Acas Code of Practice
The formal standard, published by Acas, setting out what a fair disciplinary and grievance process should look like, which employment tribunals are required to take into account when deciding related claims.
The Code sets out the basic shape of a fair process for both discipline and grievance: investigate first, tell the person clearly what is being looked at, hold a proper meeting or hearing, allow them to be accompanied, and give a right of appeal, applied to both a disciplinary case against an employee and a grievance raised by one.
The Code is deliberately written as a statement of good practice rather than a rigid rulebook, recognising that a small business and a large one, or a minor issue and a very serious one, may reasonably be handled with different levels of formality, provided the basic fairness principles are still respected.
What gives the Code its real force is what happens when it is ignored: an employment tribunal can adjust the compensation awarded in a related claim, up or down, depending on whether the employer or the employee unreasonably failed to follow it, which means a technically fair reason for dismissal can still end up costing an employer more if the process around it fell short of the Code.
Because the Code is a living document, reviewed and updated by Acas from time to time, checking the current version before relying on it is safer than assuming a previously read summary still reflects it exactly. Acas publishes the current Code directly.
Advisory, Conciliation and Arbitration Service (Acas)
An independent, publicly funded United Kingdom body that provides free workplace relations advice, runs conciliation between employers and employees, and publishes the codes of practice tribunals use to judge fairness at work.
Acas offers a free advice helpline and guidance library covering essentially every everyday employment relations question, from how to run a disciplinary hearing to what a settlement agreement should contain, making it one of the first places both employers and employees turn to before a dispute becomes formal.
For most prospective employment tribunal claims, contacting Acas for early conciliation is a mandatory first step, giving both sides a genuine, structured opportunity to resolve the dispute without a hearing at all. Acas also offers collective conciliation for disputes between an employer and a recognised trade union, and a voluntary arbitration scheme as an alternative to a tribunal hearing for certain kinds of claim.
Acas is independent of both government and any particular side of industry, which is central to its credibility: it does not represent employers or employees as a class, it exists to help both sides resolve disputes and to set out what fair practice generally looks like.
Acas’s own codes of practice, most importantly the one covering discipline and grievance, are not themselves the law, but employment tribunals must take them into account, which in practice makes them the working standard nearly every disciplinary and grievance process in the country is measured against.
Apprenticeship Levy
A charge on larger United Kingdom employers, calculated on their total pay bill, paid into a digital account that can then be drawn on to fund apprenticeship training.
Employers whose total pay bill rises above a defined annual threshold pay the levy automatically through PAYE, alongside their other payroll liabilities, with the amount collected building up in a dedicated digital apprenticeship service account rather than disappearing into general taxation untracked.
Funds in the account can be spent on approved apprenticeship training and assessment costs for the employer’s own staff, covering new apprentices as well as existing employees taking on a recognised apprenticeship standard, though the funds cannot generally be used to cover an apprentice’s wages themselves.
Unused funds in the account do not sit there indefinitely: they generally expire after a set window from when they entered the account unless spent, or unless the employer chooses to transfer a portion of unused funds to another employer, including smaller businesses in its own supply chain.
Employers below the pay bill threshold do not pay the levy directly, but can still access government co-funding toward apprenticeship training costs, generally covering the large majority of the cost with the employer contributing a smaller share themselves. GOV.UK publishes the current pay bill threshold, funding rules and co-funding rates.
Attachment of Earnings Order (AEO)
An order from a court or another authorised body requiring a United Kingdom employer to deduct a set amount from an employee’s wages and pay it toward a debt the employee owes, such as unpaid fines, council tax or maintenance.
Once served with a valid order, the employer must generally start making the required deduction from the employee’s next available pay run, calculated using a set table or formula tied to the employee’s earnings, and continue until the debt is cleared or the order is discharged.
The rules generally protect a minimum share of the employee’s earnings, sometimes called protected earnings, so that a deduction cannot reduce someone’s take home pay below a basic protected level in a given pay period, even where the outstanding debt is large.
An employee can be subject to more than one order at once, in which case the law sets out a priority between them, since orders are not simply applied in whatever sequence they happen to arrive.
Employers who receive an order are legally required to comply and to keep accurate records of what has been deducted and paid over, and failing to operate a valid order correctly can expose the employer itself to penalties. GOV.UK publishes the current deduction tables and the process for handling these orders.
Benefits in Kind (BIK)
Non cash perks or advantages an employer provides to an employee, such as a company car, private medical insurance or an interest free loan, that generally have a taxable value beyond ordinary salary.
A benefit in kind is anything of real value provided because of employment rather than being available to the general public on the same terms, which is why it needs to be identified, valued and reported even though no cash actually changes hands as part of providing it.
Some benefits are specifically exempt or given favourable treatment, such as modest trivial benefits given occasionally, or certain work related training and equipment, while other, superficially similar perks are fully taxable, which is why the correct treatment of a given benefit needs to be checked rather than assumed from general intuition about what feels fair.
Providing a benefit in kind can affect an employee’s tax position noticeably, sometimes changing the rate of tax they pay overall, which is why total reward conversations that focus purely on cash salary can understate what an employee is genuinely receiving, and why employees are not always aware of the tax effect of a benefit until it shows up on their annual reporting.
Employers generally have to report benefits in kind either through an annual Expenses and Benefits Return, or in real time through payrolling if they have registered to do so in advance. HM Revenue and Customs (HMRC) publishes the current valuation rules for each type of benefit.
Constructive Dismissal
A situation where an employee resigns because their employer’s conduct amounted to a fundamental breach of the employment contract, allowing the resignation to be treated in law as a dismissal.
The legal hook is a breach of the implied duty of mutual trust and confidence, or some other fundamental term of the contract, serious enough that the employee cannot reasonably be expected to carry on working under it. A single sufficiently serious act, or a pattern of smaller incidents culminating in one final straw, can both potentially amount to this kind of breach.
The employee must resign in response to the breach, and generally without an unreasonable delay after it happens, since carrying on working for too long without objecting can be read as accepting the changed situation rather than treating the contract as at an end.
Once a resignation is accepted as a constructive dismissal, the employee can generally pursue the same unfair dismissal remedies they would have had if the employer had dismissed them outright, provided they otherwise meet the usual qualifying conditions for a claim.
Because constructive dismissal claims turn heavily on the specific facts and on how a reasonable person would view the employer’s conduct, they are notoriously fact dependent, which is why employers considering a significant change to someone’s role, pay or working conditions are well advised to think through how it might be read before making it. Acas publishes current guidance on the boundary between a difficult workplace and a genuine breach of contract.
Contract of Employment
The legal relationship formed once someone agrees to work for an employer in exchange for pay, made up of express terms actually agreed plus a body of implied terms the law adds regardless of what was said.
A contract of employment does not need to be a single signed document to exist. It forms as soon as someone starts work under agreed terms, whether those terms were negotiated in detail, offered on a standard template, or simply understood from how the parties behaved, though a clear written contract makes what was agreed far easier to prove later.
On top of whatever the parties expressly agreed, such as pay, hours and job title, the law adds a set of implied terms that apply regardless of whether anyone wrote them down, including a duty of mutual trust and confidence, a duty of reasonable care for health and safety, and a duty to pay agreed wages for work done.
The terms of the contract, express and implied together, are what most disputes ultimately turn on, whether the question is whether a change to someone’s role amounted to a constructive dismissal, whether a deduction from pay was lawful, or what notice is actually owed on either side.
A written statement of particulars is a distinct statutory document that sits alongside the contract, summarising its key terms, but the underlying contract itself can, and often does, contain more than that statement alone sets out. Acas publishes current guidance on what a compliant contract of employment should cover.
Data Protection Act (DPA)
The United Kingdom statute that works alongside the UK GDPR, adding domestic detail such as specific exemptions, criminal offences connected to personal data, and the formal powers of the data protection regulator.
Where the UK GDPR sets out the core principles and rights, the Data Protection Act fills in detail that sits underneath and around it, including specific exemptions from some GDPR obligations in defined circumstances, and rules for types of processing, such as certain law enforcement and national security activity, that fall partly outside the regulation’s own scope.
The Act also creates specific criminal offences, including unlawfully obtaining or disclosing personal data without the data controller’s consent, which gives data protection law a sharper edge than a purely regulatory, fines only regime.
It is the Act that formally establishes the Information Commissioner’s Office, setting out its powers to investigate, to issue enforcement notices, and to fine organisations that breach data protection law, so the ICO’s authority to act ultimately traces back to this statute rather than to the UK GDPR alone.
In practice, the two work as a single package: an employer handling HR data needs to satisfy both the principles and rights set out in the UK GDPR and the domestic detail and offences set out in the Act, rather than treating either as optional once the other is satisfied. The Information Commissioner’s Office (ICO) publishes current guidance covering both together.
Details of Employee Leaving Work (P45)
The standard form a United Kingdom employer issues when someone leaves a job, showing their pay and tax deducted so far in that tax year and the tax code they were on, so the next employer or the tax authority can pick up where the last one left off.
A P45 exists to close the loop cleanly: it tells whoever needs to know, a new employer, a benefits office, or the person themselves, exactly how much the leaver was paid and how much tax had been taken from them in that tax year up to their last day, plus the tax code that applied.
A new employer uses the figures on a P45 to carry on the correct tax treatment from day one, rather than starting the person from scratch on a temporary basis. Someone who cannot produce a P45, because they lost it or because their previous employer was slow to issue one, is generally set up on an emergency or temporary basis until the position is confirmed another way.
The P45 also matters for someone who is not moving straight into another job: it is commonly needed to claim certain benefits, to support a tax refund claim, or simply as evidence of earnings and tax paid for that part of the year.
Issuing a P45 promptly is a standing employer duty on every leaver, not an optional courtesy, since delay can genuinely hold up someone’s next payslip being taxed correctly or a benefit claim being processed. HM Revenue and Customs (HMRC) publishes the current guidance on how and when the form should be produced.
Disciplinary Procedure
The formal, structured process a United Kingdom employer follows when addressing a concern about an employee’s conduct or performance, running from investigation through to a decision and a right of appeal.
A fair disciplinary procedure generally starts with a proper investigation, gathering the facts and relevant evidence before any decision is made about whether there is a case to answer at all, rather than moving straight to a hearing on the strength of an initial complaint alone.
Where a case does proceed, the employee is generally given clear written notice of the allegation, a hearing at which they can respond, and the right to be accompanied by a colleague or a trade union representative. The outcome can range from no action, through a tiered set of warnings of increasing seriousness, up to dismissal, depending on what the evidence actually supports.
Whatever the outcome, the employee generally has a right of appeal, heard so far as possible by someone who was not directly involved in the original decision, giving a genuine opportunity for the outcome to be reconsidered rather than being purely a formality.
Skipping or rushing these steps is one of the most common reasons a dismissal that might otherwise have been justified is found to be an unfair dismissal, since UK tribunals judge the process almost as closely as the underlying reason. Acas publishes the Code of Practice that sets the minimum standard for a fair disciplinary procedure.
Disclosure and Barring Service check (DBS check)
A criminal record check administered by the Disclosure and Barring Service, used by United Kingdom employers to screen candidates for roles that involve a defined level of trust, such as working with children or vulnerable adults.
Checks come in different levels: a basic check, available for any role, shows unspent convictions and cautions only; a standard check adds spent convictions and cautions for roles with a specific legal exemption; and an enhanced check, generally reserved for the most sensitive roles, adds relevant local police information and, where relevant, a check against the barred lists for working with children or adults.
Not every previous conviction or caution appears on a check indefinitely. Certain older or minor items can be subject to filtering, meaning they are not disclosed at all once they meet the filtering rules, reflecting the idea that a check should be proportionate rather than a permanent record of every past incident regardless of relevance.
An individual can subscribe to the DBS update service, keeping their certificate current so that a new employer can, with consent, check its status online rather than requiring an entirely fresh application every time someone moves role, which can meaningfully speed up onboarding into a regulated role.
Employers must have a genuine, lawful basis for requesting a given check level, since requesting a higher level check than a role actually justifies is not permitted. The Disclosure and Barring Service and GOV.UK publish the current eligibility rules for each check level.
Employment Status
The legal category a working relationship falls into, generally employee, worker, or genuinely self employed, which determines which statutory rights and protections actually apply to that person.
An employee sits at the fullest end of protection: someone working under a contract of employment, subject to a real degree of control over how, when and where the work is done, who typically qualifies for rights such as protection from unfair dismissal and statutory redundancy pay once they meet any relevant qualifying period.
A worker sits in a narrower but still genuinely protected middle category, someone who personally does work for another party without that party being a client of their own independent business, entitled to rights such as the National Minimum Wage, paid holiday and protection from discrimination, without necessarily holding the fuller set of rights an employee has.
Someone genuinely self employed, running their own business and taking on the client relationship as a matter of business to business dealing rather than personal service, generally sits outside employment protection altogether, responsible for their own tax and National Insurance rather than having it deducted at source.
What the contract is labelled is not decisive: tribunals and HMRC look at the reality of how the relationship actually operates, including control, personal service and mutuality of obligation, so a person genuinely working as an employee cannot be moved outside employment protection purely by being called something else on paper. This same substance over label question underpins the off payroll working rules.
Employment Tribunal
The specialist judicial body that hears disputes between employers and workers in the United Kingdom, such as claims of unfair dismissal, discrimination or unpaid wages.
Employment tribunals are designed to be more accessible than the ordinary civil courts: proceedings are generally less formal, individuals can represent themselves rather than needing a lawyer, though many choose to be represented, and costs are generally not awarded against the losing side except in limited circumstances such as clearly unreasonable conduct of the case.
Before most claims can be brought, the claimant generally has to go through Acas early conciliation first, giving both sides a chance to settle without a hearing. Claims must usually be brought within a short statutory time limit from the event complained of, which tribunals apply strictly except in limited, genuinely exceptional circumstances.
Hearings and decisions are generally public, and written decisions are published, which means a tribunal outcome can carry a reputational dimension for an employer well beyond whatever compensation is ultimately ordered.
Remedies vary by claim type, from compensation calculated against actual financial loss, through awards specifically for discrimination, to reinstatement or re-engagement orders in dismissal cases, though compensation is by far the most common practical outcome. GOV.UK and Acas publish the current claim time limits, fees position and procedural rules.
End of Year Certificate (P60)
The annual summary a United Kingdom employer must give every employee still on its payroll at the end of the tax year, showing their total pay and the tax and National Insurance deducted from it across that year.
Where a P45 closes out an employment part way through a tax year, the P60 is the equivalent summary for anyone still employed when the tax year ends, drawing together everything paid and deducted for that person across the whole year into one certificate.
Employees rely on their P60 as proof of income and tax paid for a given year, commonly needed for a mortgage application, a loan, a tax credit or benefit claim, or simply to check that the tax taken over the year matches what they expected based on their payslips.
Because a P60 is meant to reconcile a full year of payroll activity into one figure set, it is only accurate if every pay run through that year was itself accurate, which is why experienced payroll teams treat year end P60 preparation less as a fresh task and more as confirmation that the year’s ongoing discipline held up.
Employers must issue a P60 to every relevant employee by a set point shortly after the tax year ends, and HM Revenue and Customs (HMRC) publishes the current deadline along with the accepted formats for providing it.
Equality Act
The United Kingdom law that brings together protection against discrimination, harassment and victimisation at work into one place, built around a defined list of protected characteristics.
The Act consolidated what had previously been a scattered set of separate discrimination laws into a single framework, applying consistent concepts, direct discrimination, indirect discrimination, harassment and victimisation, across every protected characteristic rather than each having its own separate rulebook.
Direct discrimination means treating someone worse specifically because of a protected characteristic. Indirect discrimination covers a rule or practice that applies to everyone but disadvantages people who share a particular characteristic, and cannot usually be justified unless the employer can show a genuine, proportionate reason for it. Harassment covers unwanted conduct related to a characteristic that violates someone’s dignity or creates an intimidating, hostile or offensive environment, and victimisation covers being treated badly because someone made or supported a complaint.
For disability specifically, the Act adds a positive duty to make reasonable adjustments, changing a workplace, role or process so that a disabled worker is not put at a substantial disadvantage compared with others, rather than simply avoiding obviously discriminatory treatment.
The Act reaches across the whole employment relationship, from job adverts and recruitment through pay, promotion, discipline and dismissal, so discrimination risk needs to be considered at every one of those stages rather than only at the point someone is actually let go. Acas publishes current guidance on applying the Act in practice.
Expenses and Benefits Return (P11D)
The annual return a United Kingdom employer submits for each relevant employee, reporting the benefits in kind and certain expenses provided during the tax year that were not already taxed through payroll.
A P11D pulls together everything reportable that a specific employee received in a tax year, such as private medical insurance, a company car, or a taxable expense payment, so that HMRC can adjust that employee’s tax position to reflect the real value of what they received beyond salary.
Alongside the individual returns, the employer generally pays a separate Class 1A National Insurance charge on the total value of the benefits reported, which is an employer only cost, distinct from the employee’s own income tax on the same benefits.
Employers can instead choose to payroll benefits, registering with HMRC in advance to tax most benefits in kind through the payroll in real time across the year, rather than reporting them after the fact on a P11D, which can reduce the year end workload and give employees a more accurate in year tax position.
A P11D must be submitted, and a copy given to the employee, by a set deadline shortly after the tax year ends, and HM Revenue and Customs (HMRC) publishes the current filing deadline and the valuation method for each benefit type.
Flexible Working Request
The statutory right of an employee to formally ask their employer to change their hours, working pattern or place of work, which the employer must consider properly and can only refuse for specified business reasons.
Any employee can make a statutory flexible working request from the start of their employment, covering changes such as working part time, compressing hours into fewer days, job sharing, or working remotely for some or all of the time, rather than the right being reserved for people with caring responsibilities alone.
An employer receiving a request must consider it in a reasonable manner, which generally means genuinely engaging with whether the change could work rather than issuing an automatic refusal, and can only turn it down for one of a defined list of business reasons set out in law, such as an inability to reorganise work among existing staff or a negative effect on quality or performance.
The process runs to a statutory timetable: the employer must respond within a set, legally defined period, and an employee is generally limited to a set number of statutory requests within a defined period, which is why an informal conversation about a one off temporary change is often handled outside the formal statutory process entirely.
Handling a request badly, whether by ignoring the statutory process, refusing for a reason not on the permitted list, or applying inconsistent reasoning between similar requests, can expose an employer to a claim at the employment tribunal. Acas publishes the current statutory process and a code of practice on handling requests.
Gender Pay Gap Reporting
The requirement for larger United Kingdom employers to calculate and publish, once a year, the difference in average pay and bonuses between the men and women they employ.
Employers above a defined headcount threshold must publish a set of figures each year, including the mean and median difference in hourly pay between male and female employees, an equivalent mean and median gap in bonus pay, the proportion of men and women who received a bonus, and the split of men and women across four equal sized pay bands from lowest to highest paid.
The gender pay gap is a genuinely different measure from equal pay: it does not, by itself, show whether a man and a woman doing the same or equivalent work are paid the same, it shows the overall average gap across an entire workforce, which can exist even where every individual role is paid fairly, if men and women are simply not evenly distributed across more and less senior, or more and less well paid, roles.
Because the figures are published on a public government service and are simple to compare year on year, gender pay gap reporting has become as much a reputational and talent facing exercise as a compliance one, with many employers publishing a narrative alongside the raw figures to explain what is driving their gap and what they are doing about it.
The requirement applies to the employer as a whole rather than to individual departments or sites, so getting the underlying data right, correctly identifying who counts as a relevant employee and what counts as ordinary pay and bonus pay, is the real work behind an accurate submission. GOV.UK publishes the current reporting threshold and the online service used to submit the figures.
Grievance Procedure
The formal process an employee can use to raise a concern or complaint about their employment, giving the employer a structured way to investigate and respond before the matter escalates further.
A grievance procedure generally lets an employee raise a concern in writing, have it properly looked into, attend a meeting to discuss it with the right to be accompanied by a colleague or trade union representative, and receive a written outcome explaining the decision reached.
Many workplace concerns are, and should be, resolved through an informal conversation long before a formal grievance is ever raised, but where informal resolution genuinely is not working, or the concern is serious enough to warrant it, the formal procedure exists precisely so the employee is not left with no structured way to be heard.
As with a disciplinary outcome, the employee is generally entitled to appeal the outcome of a grievance if they are not satisfied, ideally to someone more senior who was not involved in the original decision, so the process retains a genuine second look rather than being decided once and closed.
An employer that has no grievance procedure at all, or that fails to follow its own procedure properly, risks both a poorly resolved underlying issue and an increased compensation award if the matter later reaches an employment tribunal. Acas publishes the Code of Practice that sets the minimum standard for handling grievances fairly.
Gross Misconduct
Behaviour serious enough to justify dismissing an employee immediately, without notice or payment in lieu of notice, because it is fundamentally incompatible with continuing the employment relationship.
Classic examples generally include theft or serious dishonesty, violence, serious breaches of health and safety, serious insubordination, and being seriously under the influence of drink or drugs at work, though what actually counts depends on the nature of the job and is often set out, non exhaustively, in a company’s own disciplinary policy.
Even in a case that looks like clear gross misconduct, the employer is still expected to carry out a fair investigation and a fair disciplinary procedure before dismissing, rather than treating the seriousness of the allegation as a reason to skip process altogether. Dismissing without a fair process, even for something that turns out to be genuine gross misconduct, can still result in a successful unfair dismissal claim on process grounds alone.
An employer who dismisses summarily for gross misconduct but cannot actually support that finding on the evidence is exposed twice over: the dismissal is likely to be found unfair, and the employee may also have a claim for the notice pay that gross misconduct would otherwise have removed their right to.
Because of this risk, gross misconduct dismissals are generally treated as requiring the most careful investigation and the clearest record keeping of any disciplinary outcome. Acas publishes current guidance, through its code of practice, on investigating and handling misconduct fairly.
HM Revenue and Customs (HMRC)
The United Kingdom’s tax authority, responsible for administering income tax and National Insurance, including the amounts employers deduct from pay, and for enforcing the rules behind most of the country’s payroll obligations.
For payroll and HR purposes, HMRC is the counterpart nearly every employer deals with directly: it sets the tax codes and National Insurance thresholds used in PAYE, receives Real Time Information submissions on or before every payday, and is the destination for filings on benefits in kind, the Apprenticeship Levy and student loan deductions alike.
HMRC’s reach goes beyond simply collecting money. It publishes detailed guidance and calculators that payroll software relies on, decides how specific pay elements and benefits should be treated for tax and National Insurance, and runs compliance checks that can look back across previous periods if something appears to have been under withheld.
HMRC is also the practical first stop when a specific payroll question does not have an obvious answer, whether that is how to treat an unusual benefit, how to correct a mistaken deduction, or how the off payroll working rules apply to a particular engagement.
Because HMRC’s guidance, rates and thresholds are reviewed and updated regularly, treating an HMRC facing configuration as a living setting, checked at the start of each tax year and whenever a change is announced, is safer than assuming it never needs revisiting.
Holiday Entitlement
The statutory minimum amount of paid annual leave a United Kingdom worker is entitled to each year, building up from the first day of work and applying regardless of how many hours someone works.
Every worker, not only employees in the narrower legal sense, builds up a right to a set number of weeks of paid leave each year under the Working Time Regulations, intended to guarantee genuine time away from work rather than simply extra pay for staying at the job.
Someone who works part time, or who joins or leaves partway through the year, does not lose out proportionally: entitlement is calculated on a pro rata basis, scaled to the pattern and length of time actually worked, rather than assuming everyone earns the same full year entitlement regardless of circumstance.
Carrying leave over into the next year is generally restricted, on the logic that the entitlement exists to be used as time off rather than banked indefinitely, though special protection generally applies to someone who could not reasonably take their leave because of a long absence such as extended sick leave or a period of family related leave.
When employment ends, any statutory leave built up but not yet taken must be paid out as part of final pay, which is why accurate, ongoing leave tracking matters well beyond the immediate booking of time off. Acas publishes current practical guidance on calculating and managing holiday entitlement.
Holiday Pay
The amount a worker must actually be paid while taking their statutory holiday, calculated to reflect what they would normally have earned rather than simply their basic contracted rate.
Holiday pay is meant to leave a worker no worse off financially for having taken time off, which is why the calculation looks at normal remuneration rather than stopping at basic pay: regularly worked overtime, certain commission, and other payments that form part of someone’s usual earnings can all need to be reflected in what they are paid while on leave.
For workers with a regular, fixed pattern the calculation is relatively simple, but for those with genuinely irregular hours or part year working, holiday pay is generally worked out as an average over a reference period looking back across recent weeks actually worked, smoothing out weeks with little or no work rather than distorting the average downward.
For irregular hours and part year workers specifically, an accepted alternative method calculates holiday pay as a small statutory uplift added to pay for each period actually worked, rather than requiring leave to be booked and paid separately in the usual way, provided it is calculated and shown transparently rather than simply folded invisibly into a headline hourly rate.
Getting holiday pay wrong, for example by paying only basic pay to someone whose normal earnings regularly include overtime or commission, is one of the more common and costly United Kingdom payroll errors, since it can create a running liability across every affected pay period rather than a single one off mistake. Acas publishes current guidance on the correct method for different working patterns.
Information Commissioner’s Office (ICO)
The independent regulator responsible for enforcing data protection law in the United Kingdom, including how employers handle personal data about their staff and candidates.
The ICO handles complaints from individuals who believe their personal data has been mishandled, which for an employer can mean a current or former employee, or even an unsuccessful job candidate, raising a concern about how their information was collected, used or shared.
Where a complaint or its own investigation reveals a genuine problem, the ICO can issue an enforcement notice requiring specific changes, and can impose a financial penalty for serious breaches, giving data protection law real consequences beyond a simple written warning.
A personal data breach that meets the legal threshold generally has to be reported to the ICO within a short statutory window of the organisation becoming aware of it, and in more serious cases the affected individuals may need to be told directly as well, rather than the organisation quietly handling it internally.
Beyond enforcement, the ICO publishes extensive practical guidance and codes of practice covering everyday HR situations, such as handling a subject access request, using workplace monitoring or CCTV, and running background checks, making it the natural first stop for a data protection question that does not have an obvious answer. The Information Commissioner’s Office (ICO) itself is the source for its current guidance and enforcement approach.
National Insurance Contributions (NIC)
Payments deducted from an employee’s wages and added by the employer, calculated on earnings, that fund the state pension and a range of other contributory benefits, alongside a separate charge that self employed people pay directly.
For most employees, National Insurance is collected as Class 1 contributions: a primary share taken from the employee’s pay, and a secondary share the employer pays on top, calculated on earnings above a starting point up to an upper limit. Neither share is optional once earnings clear the starting point, and both are calculated and reported through the same payroll run as income tax.
Unlike a straightforward tax, National Insurance is explicitly contributory: a person’s National Insurance record, built up over a working life, determines their eventual entitlement to the state pension and to certain other benefits, which is why gaps in someone’s contribution history can matter well beyond the pay period in which they occur.
Self employed people pay National Insurance directly rather than through an employer, generally through a class linked to their profits, reported alongside their own tax return rather than deducted from wages, which is one of several practical differences that flow from the underlying employment status question.
HM Revenue and Customs (HMRC) publishes the current National Insurance classes, thresholds and rates, and reviews them periodically, so a payroll configuration should be treated as something to refresh rather than a fixed setting carried forward unchanged.
National Living Wage (NLW)
The highest band of the National Minimum Wage, applying to workers from a qualifying age onward, functioning as the top statutory pay floor for adult workers in the United Kingdom.
The National Living Wage is not a separate scheme from the National Minimum Wage, it is that same statutory structure’s top age band, paid to workers once they reach the qualifying age, so an employer’s minimum wage compliance work covers both under one umbrella rather than as two different systems.
Because the National Living Wage sits at the top of the age banded scale, it is generally the highest statutory figure an employer has to plan payroll and budget increases around each year, and it is the rate most often referenced in public discussion of low pay.
The same practical traps that catch out National Minimum Wage compliance apply here too: unlawful deductions, unpaid working time, and required costs a worker bears themselves can all pull effective pay below the legal floor even if the contracted hourly rate looks correct on paper.
The Low Pay Commission recommends the rate and the qualifying age, and the government publishes the current figures on GOV.UK, with HM Revenue and Customs (HMRC) enforcing compliance in the same way it does across the rest of the minimum wage structure.
National Minimum Wage (NMW)
The lowest hourly rate United Kingdom employers may legally pay most workers, set by government and reviewed regularly, with different bands depending on the worker’s age and status.
The National Minimum Wage sets a statutory floor on pay per hour actually worked, calculated across a defined pay reference period rather than simply glanced at on a single shift. Several distinct age based bands exist below the top rate, along with a separate lower band for apprentices in the early part of their training.
Working out whether someone is genuinely being paid at or above the minimum is not always as simple as dividing pay by hours: certain deductions, unpaid trial shifts, mandatory uniform costs the worker has to fund themselves, and unpaid travelling time between assignments can all effectively drag real pay below the legal floor even when the headline hourly figure looks compliant.
Enforcement is active rather than purely complaint driven: HM Revenue and Customs (HMRC) can investigate any employer, order arrears to be paid going back across the affected period, issue financial penalties, and in serious cases see the employer publicly named as having underpaid staff.
The Low Pay Commission recommends the rates each year, and the government publishes the current age bands and figures on GOV.UK, so payroll and HR need to check that source directly rather than relying on a rate remembered from an earlier period.
Notice Period
The amount of warning either an employer or an employee must give before ending employment, made up of a statutory minimum that lengthens with service and any longer period agreed in the contract.
The law sets a statutory minimum notice period that increases the longer someone has worked for an employer, up to a capped maximum, applying however the contract itself is silent or tries to offer something shorter. A contract can lawfully agree to a longer notice period than the statutory minimum, but not a shorter one.
Employers can choose to have someone work through their notice, place them on garden leave where they remain employed and paid but are not required to attend work, or make a payment in lieu of notice ending the relationship immediately while paying out what the notice period would have been worth.
Payment in lieu of notice is treated as employment income for tax and National Insurance purposes in broadly the same way as regular pay, regardless of whether the contract specifically allowed for it, which is a point worth checking carefully when calculating a final payment.
Failing to give proper notice, on either side, is itself a breach of contract, separate from whatever reason prompted the departure, which is why notice is worth getting right procedurally even when the underlying decision to leave or dismiss is not in question. Acas publishes current guidance on notice periods and pay in lieu.
Off-Payroll Working Rules (IR35)
United Kingdom tax rules that decide whether someone providing services through their own company should be taxed broadly as if they were an employee of the organisation actually receiving their work.
The rules exist to stop genuine employment relationships being routed through a personal service company purely to reduce tax and National Insurance, comparing the reality of how the work is done, control over how, when and where it happens, whether the person can send a substitute, and whether there is an ongoing obligation to offer and accept work, against how a genuinely independent contractor would typically operate.
For medium and large private sector clients, and for public sector clients generally, it is the client receiving the services, not the contractor’s own company, that must assess status and issue a formal status determination. Where the engagement is found to sit inside the rules, whoever pays the contractor’s company becomes responsible for deducting tax and National Insurance as if the payment were a salary.
A small company exemption means that some smaller private sector clients are not required to make this determination themselves, in which case the responsibility for assessing status generally falls back to the contractor’s own company instead, which is why the same contractor can face a different practical process depending on the size of the client engaging them.
Getting the determination wrong carries real financial risk, since the client or fee payer can become liable for unpaid tax and National Insurance if a contractor is later found to have been taxed incorrectly. HM Revenue and Customs (HMRC) publishes current guidance and an online tool to help assess status.
Pay As You Earn (PAYE)
The system through which a United Kingdom employer deducts income tax directly from an employee’s wages each pay period and pays it across to the tax authority, rather than leaving the employee to settle a bill once the year ends.
PAYE works from a tax code, a short reference that tells payroll how much of an employee’s pay is tax free before the remaining balance is taxed at the applicable bands. Because the code is applied every single pay run, tax is collected in small, regular instalments spread across the year rather than as one large demand after the event.
The employer is not a bystander in this system, it is the withholding agent: calculating the deduction correctly, applying any change of tax code promptly, and paying over what has been deducted on the required schedule are all employer duties, not employee ones. A new starter who cannot immediately provide their previous pay and tax details is generally set up on a temporary or emergency basis until the correct code catches up, which can mean too much or too little is taken for a short period before it self corrects.
Because PAYE and National Insurance contributions are calculated and reported together on the same pay run, the two are best understood as a single combined deduction process rather than two unrelated systems that happen to share a payslip line.
HM Revenue and Customs (HMRC) publishes the current tax codes, bands and thresholds that PAYE calculations must use, and updates them from time to time, so payroll systems and finance teams need to keep that configuration current rather than assuming a setting from a previous period still applies.
Pension Auto Enrolment
The United Kingdom legal duty on employers to automatically place eligible staff into a workplace pension and to contribute to it, without waiting for the employee to ask to join.
Auto enrolment flips the old assumption on its head: instead of an employee having to opt in to a pension, eligible workers are enrolled automatically once they meet age and earnings conditions, and it is the employee, if they wish, who has to actively opt out. Left alone, saving into a workplace pension is the default outcome of simply being employed.
Both employer and employee generally contribute, calculated on a defined band of the employee’s earnings, with the combined total required to reach at least a minimum overall level set by law. An employee who opts out is not necessarily gone for good: employers are required to periodically re enrol eligible staff who previously opted out, giving them a fresh opportunity to reconsider.
Employer duties do not end at enrolment. Contributions must continue every pay period for as long as someone remains eligible and enrolled, new starters must be assessed on the same basis as everyone else, and records of who was assessed, enrolled, contributed for, or opted out have to be kept and be ready to show if asked.
The Pensions Regulator (TPR) publishes the current age and earnings criteria, the minimum contribution levels, and the re enrolment timetable that employers must apply.
Protected Characteristics
The specific personal characteristics that United Kingdom equality law protects against discrimination, harassment and victimisation, including age, disability, gender reassignment, marriage and civil partnership, pregnancy and maternity, race, religion or belief, sex, and sexual orientation.
A protected characteristic is not simply a demographic label, it is the legal hook that a discrimination claim has to attach to: someone alleging unfair treatment generally needs to show it was connected to one of these defined characteristics, rather than unfairness or unkindness in general, however real that unfairness might otherwise be.
Several characteristics cover more ground than their everyday names might suggest. Sex and race both extend to comparisons and stereotyping well beyond an individual’s own identity, religion or belief extends to genuinely held philosophical beliefs as well as organised religion, and gender reassignment protects a person’s status while undergoing, having undergone, or proposing to undergo a process to change their sex.
Discrimination law generally works by comparison: someone claiming direct discrimination is usually compared with how someone without their characteristic was, or would have been, treated in a similar situation, which is why documenting the genuine reason behind a decision matters as much as the decision itself.
A single decision can potentially touch more than one protected characteristic at once, sometimes called intersectional discrimination, which is one reason employers are encouraged to look at the real substance of a decision and its effects rather than checking characteristics off a list one at a time. Acas publishes current guidance on how the characteristics apply in everyday employment situations.
Real Living Wage
A voluntary hourly rate, higher than the legal minimum, calculated to reflect the actual cost of living, that employers can choose to sign up to and be accredited against.
Unlike the National Minimum Wage and National Living Wage, which are legal floors that every employer must meet, the Real Living Wage is entirely voluntary: no employer is required to pay it, and choosing to do so is a reputational and recruitment decision rather than a compliance one.
The rate is calculated independently, based on modelling of what people actually need to spend to cover a decent standard of living, which is why it is generally higher than the statutory minimum and is recalculated periodically as living costs change.
Employers who commit to it can seek formal accreditation, publicly signalling that every directly employed member of staff, and often contracted staff working regularly on their premises too, are paid at or above the current Real Living Wage rather than just the legal minimum.
The Living Wage Foundation calculates and publishes the current voluntary rates, along with the accreditation process for employers who want to be formally recognised against them.
Real Time Information (RTI)
The United Kingdom requirement for employers to report pay and deductions to the tax authority on or before each payday, rather than gathering the same information into a single annual return.
Before Real Time Information, payroll figures were largely reported to government once a year, well after the pay had actually been made. RTI changed that by requiring a Full Payment Submission for essentially every pay run, sent at or before the moment employees are paid, so the tax authority holds a near live picture of what every employer is paying and deducting.
A related filing, generally called an Employer Payment Summary, covers information that a per payday submission cannot, such as recovering statutory payments already made or reporting a period with no employees paid at all. Between the two, RTI is meant to leave no gap in the ongoing record.
RTI’s immediacy is also what makes several other systems work: benefit assessments, student loan and other deduction plans, and year end reconciliation all lean on the fact that pay and deduction data is already sitting with government almost as soon as it happens, rather than being reconstructed from a once a year filing.
Because RTI submissions are expected on time, every time, a missed or late submission is treated as a compliance failure in its own right, separate from whether the underlying pay and tax were calculated correctly. HM Revenue and Customs (HMRC) publishes the current submission deadlines and the penalty approach for missed filings.
Redundancy
Ending someone’s employment because their role, or the work it involves, is genuinely no longer needed, rather than because of anything the person did, treated in law as a distinct fair reason for dismissal with its own process.
For a dismissal to be a genuine redundancy, there generally needs to be a real reduction in the need for employees to do work of a particular kind, whether because the business is closing, a site is closing, or fewer people are simply needed to do the same kind of work as before, rather than the label being used to cover what is actually a performance or conduct dismissal.
A fair redundancy process generally involves identifying an appropriate selection pool of employees whose roles could be affected, applying fair and objectively scored selection criteria across that pool, and carrying out genuine, meaningful consultation with affected employees before any final decision is made. Where a large enough number of redundancies are proposed at one establishment within a short period, additional collective consultation obligations with employee representatives generally apply on top of individual consultation.
Employers are generally expected to consider whether suitable alternative employment exists elsewhere in the organisation before dismissing someone for redundancy, and an employee who accepts a trial period in an alternative role does not lose their redundancy rights simply by trying it and later deciding it is not suitable.
A redundancy process that skips fair selection or genuine consultation can turn what might otherwise be a lawful redundancy into an unfair dismissal, even where the underlying business reason for reducing headcount was entirely genuine. Acas publishes current guidance on running a fair redundancy process.
Right to Work Check
The legal requirement for a United Kingdom employer to confirm that someone is permitted to work in the country before they start, and to keep evidence of that check on file.
A right to work check can generally be carried out in one of a few accepted ways: examining original physical documents in the presence of the holder, an online check using a share code the individual generates themselves, or a check performed through a certified digital identity service provider, with the correct method depending on the individual’s nationality and immigration status.
Carrying out the check correctly, before employment starts, and keeping the required evidence on file gives the employer a statutory excuse against a civil penalty even if it later turns out the person did not actually have the right to work, provided the check was genuinely done properly in the first place.
Where someone’s permission to work is time limited, the employer generally has to repeat the check before that permission expires, rather than treating the original check as a one time task, since continuing to employ someone whose right to work has lapsed removes the protection the original check gave.
Knowingly employing someone without the right to work can expose an employer to both a substantial civil penalty and, in serious cases, criminal liability, regardless of how well qualified or valuable that person otherwise is to the business. GOV.UK and the Home Office publish the current accepted document lists and checking process.
Salary Sacrifice
An arrangement in which an employee agrees to give up part of their cash salary in exchange for a non cash benefit, commonly a pension contribution, in a way that can reduce the tax and National Insurance both sides pay.
Because the sacrificed amount is no longer paid as cash salary, it generally falls outside the earnings that income tax and National Insurance are calculated on, which is why salary sacrifice is commonly used for pension contributions, and is also seen for benefits such as cycle to work schemes and certain car arrangements.
For the arrangement to work as intended, it needs to be a genuine contractual variation, properly documented and communicated, changing the employee’s actual contractual salary going forward rather than simply relabelling an existing payment on the payslip without anything really changing.
A salary sacrifice arrangement must not reduce an employee’s cash pay below the National Minimum Wage or National Living Wage, which limits how much lower paid employees can sacrifice compared with more highly paid colleagues, regardless of how attractive the underlying benefit might otherwise be.
The favourable tax and National Insurance treatment does not automatically apply to every benefit offered this way, and which benefits qualify has changed over time, so it is worth confirming the current treatment of a specific benefit before assuming it still qualifies. HM Revenue and Customs (HMRC) publishes the current rules on which benefits retain favourable tax treatment under salary sacrifice.
Settlement Agreement
A legally binding agreement between an employer and an employee, usually made in exchange for a payment, in which the employee agrees to give up their right to bring specified claims relating to their employment.
A settlement agreement is generally used to bring an employment relationship to a clean, negotiated end, or to resolve a specific dispute, in a way that gives the employer certainty against a future tribunal claim in exchange for a payment or other terms agreed with the employee.
For a settlement agreement to be legally valid, the employee must have received independent legal advice on its terms and effect from a relevant, qualified adviser, which is why an employer offering one will typically contribute toward the employee’s reasonable legal costs of getting that advice.
Discussions that lead up to a settlement agreement are often protected as without prejudice or as a protected conversation, meaning they generally cannot be used as evidence in a later unfair dismissal claim, though that protection is not absolute and does not extend to conduct such as harassment or discrimination during the discussion itself.
Once properly signed, a settlement agreement is difficult to unpick, which is exactly its point: both sides are meant to be able to rely on the matter being genuinely closed. Acas publishes current guidance on how settlement agreements work and what they should contain.
Shared Parental Leave (ShPL)
A scheme that lets eligible parents divide most of the leave and pay otherwise reserved for maternity leave between them, taken together, alternately, or in separate blocks across the child’s first period of life.
Rather than one parent using a single continuous block of leave, Shared Parental Leave lets eligible parents effectively convert the bulk of an unused maternity entitlement into a shared pool, then split it between them in whatever pattern their employers can accommodate: at the same time, one after the other, or in several separate blocks rather than one unbroken stretch.
The associated pay, generally called Statutory Shared Parental Pay, mirrors the flat rate stage of Statutory Maternity Pay and is subject to similar continuity of employment and earnings tests for whichever parent is claiming it at a given time.
Taking up shared parental leave depends on the birth mother or primary adopter first curtailing, or committing to curtail, their own maternity or adoption leave and pay, since the whole scheme works by reallocating time and money that would otherwise sit inside that single entitlement rather than creating an entirely new pot from scratch.
Notice requirements are more involved than for ordinary maternity or paternity leave, since both parents’ employers need enough advance information to plan around a pattern that can change over the period. GOV.UK publishes the current eligibility conditions, notice rules and pay rates.
Statutory Maternity Pay (SMP)
The minimum amount a United Kingdom employer must pay an eligible employee during maternity leave, structured as an earnings related rate for an initial period followed by a flat statutory rate for the remainder.
SMP is paid across a defined statutory duration once maternity leave begins, structured in two parts: an initial stretch paid at a share of the employee’s average earnings, followed by a longer stretch paid at a flat statutory rate, whichever of the two figures is lower once the flat rate applies.
Eligibility depends on meeting a minimum period of continuous service with the employer by a set point in the pregnancy, and on average earnings reaching a minimum threshold, so not every pregnant employee automatically qualifies for SMP even though maternity leave itself is a broader right that applies regardless.
Many employers pay enhanced maternity pay, topping up the statutory amount, sometimes with conditions such as returning to work for a minimum period afterwards. Where no such scheme exists, SMP is the legal floor the employer must still meet in full.
Employers can generally recover most, and small employers effectively all, of what they pay out in SMP from HM Revenue and Customs (HMRC), which also publishes the current rates, qualifying earnings threshold and statutory duration.
Statutory Paternity Pay (SPP)
The minimum amount a United Kingdom employer must pay an eligible employee taking paternity leave around the birth or adoption of a child, paid at a flat statutory rate for a short defined period.
SPP is paid over a shorter statutory window than Statutory Maternity Pay, reflecting paternity leave’s narrower scope, and can generally be taken either as one continuous block or split into two shorter blocks depending on the rules in force, rather than only as a single unbroken period.
Eligibility again depends on a minimum period of continuous service and a minimum average earnings level, tested at set points relative to the expected birth or placement for adoption, mirroring the structure used for SMP even though the amounts and duration differ.
Paternity leave and pay sit alongside, and increasingly overlap with, shared parental leave, which lets eligible parents divide a much larger pool of leave and pay between them rather than each drawing only from their own separate entitlement.
Employers can generally recover what they pay out in SPP in the same way as SMP, and HM Revenue and Customs (HMRC) publishes the current flat rate, qualifying conditions and duration.
Statutory Redundancy Pay
The minimum lump sum a United Kingdom employer must pay an eligible employee dismissed for redundancy, calculated from their age, length of service and capped weekly pay.
Eligibility generally requires the employee to have built up a minimum period of continuous service, so someone who has been with the employer for only a short time can be made redundant without a statutory redundancy payment, even though other obligations, such as fair process and notice, still apply.
The amount owed is worked out through a set formula: a number of weeks’ pay for each complete year of service, with the weekly amount used in the calculation increasing by age band and capped at a maximum figure, and the total number of years counted itself subject to an overall cap.
Statutory redundancy pay is paid on top of, not instead of, any notice pay or accrued but untaken holiday owed at the same time, and many employers choose to offer an enhanced redundancy scheme that pays more generously than the statutory minimum, particularly for longer serving staff.
Because the calculation depends on figures that are reviewed periodically, GOV.UK publishes the current weekly pay cap, the age band multipliers and the maximum number of years counted, alongside an official calculator.
Statutory Sick Pay (SSP)
The minimum amount a United Kingdom employer must pay an eligible employee who is off work through illness, paid at a flat weekly rate for a defined maximum period.
SSP is a floor, not a ceiling: it sets the minimum an eligible employee off sick must receive, but many employers offer a more generous contractual sick pay scheme on top of, or instead of, relying purely on the statutory minimum. Where a company scheme exists, SSP is often simply absorbed into it rather than paid as a separate, visible amount.
Eligibility depends on meeting an earnings threshold and being incapable of work for a long enough run of days to count as a period of incapacity for work. A short run of unpaid waiting days generally applies at the very start of an absence, though closely spaced periods of sickness can link together so that waiting days are not repeated every time.
SSP is paid for a maximum statutory duration within a single period, or a connected series of periods, of incapacity, after which entitlement to SSP itself ends even though the employee may still be off sick and covered by other arrangements or benefits.
GOV.UK publishes the current weekly rate, the earnings threshold for eligibility and the maximum duration, since all three are reviewed and can change.
Student Loan Deductions
The requirement for a United Kingdom employer to deduct student loan repayments from an employee’s pay once their earnings cross a plan specific threshold, and to pay those deductions across to the tax authority.
Several different loan plan types exist, reflecting when and where someone studied, each with its own repayment threshold and repayment rate, alongside a separate plan for postgraduate loans that generally runs independently of, and can apply on top of, an undergraduate plan.
A new employee declares which plan type, if any, applies to them, typically through a starter checklist completed when they join, and HMRC can also formally notify an employer directly to start or stop making deductions for a given employee, which the employer must then act on.
The employer has no discretion in the calculation itself: once told which plan applies, the deduction is calculated mechanically on earnings above that plan’s threshold and paid across through the normal PAYE process, alongside income tax and National Insurance, rather than being something the employer or employee can vary.
Because deductions are based on the specific plan type and its own threshold, applying the wrong plan is a genuine risk when an employee is unsure which one applies to them. HM Revenue and Customs (HMRC) publishes the current thresholds and deduction rates for each plan type.
The Pensions Regulator (TPR)
The public body responsible for regulating United Kingdom workplace pensions, including making sure employers meet their auto enrolment duties and run any pension scheme they operate properly.
TPR is the authority behind pension auto enrolment in practice: it sets out who must be enrolled and when, what the minimum contribution levels are, and how re enrolment should work, and it can investigate and take action against an employer that fails to comply.
Its remit extends beyond auto enrolment to the wider health of workplace pension schemes generally, including how trustees and scheme managers run defined benefit and defined contribution arrangements, aiming to protect the retirement savings building up inside them.
For most employers the practical relationship with TPR is administrative rather than adversarial: registering a scheme, keeping declaration of compliance filings current, and responding to routine correspondence, but non compliance can escalate quickly, from statutory notices through to financial penalties for employers that persistently fail to meet their duties.
The Pensions Regulator (TPR) itself publishes the current thresholds, minimum contribution levels and compliance guidance that every auto enrolment duty in this glossary ultimately traces back to.
Transfer of Undertakings (Protection of Employment) regulations (TUPE)
United Kingdom regulations that protect employees’ jobs, terms and continuity of service when the business, part of a business, or service they work for transfers to a new employer.
Under TUPE, affected employees generally transfer automatically to the new employer on their existing terms and conditions, carrying their continuity of service with them as if they had always worked for the new employer, rather than their old contract simply ending and a new one beginning.
The regulations cover more than a straightforward sale of a business: they also generally apply to a service provision change, such as when a contract to provide a particular service moves from one contractor to another, or is brought in house, which is why TUPE is a routine consideration in outsourcing and re-tendering decisions, not only in mergers and acquisitions.
Both the outgoing and incoming employer generally have a duty to inform and, where relevant, consult with affected employees’ representatives about the transfer, covering matters such as its timing, reasons and likely effect on those employees, well before it actually happens.
Dismissing someone, or trying to change their terms, because of the transfer itself is generally automatically unfair unless it is for a genuine economic, technical or organisational reason involving changes to the workforce, which is why harmonising the new and old employees’ terms straight after a transfer is a far more restricted exercise than it might first appear. Acas publishes current guidance on running a TUPE transfer fairly.
UK General Data Protection Regulation (UK GDPR)
The United Kingdom’s own version of the European Union’s data protection regulation, retained in the country’s domestic law after leaving the European Union, setting out the core rules for how personal data, including HR data, must be handled.
The regulation is built around a small set of core principles: personal data must be processed lawfully, fairly and transparently, collected for specified purposes and not used incompatibly with them, kept accurate and no more than necessary, retained no longer than needed, and kept secure, with the organisation able to demonstrate its own compliance under a broader accountability principle.
Individuals, including employees, hold a defined set of rights over their own data, including the right to see what is held about them, to have inaccurate data corrected, to have data erased in some circumstances, to restrict or object to certain processing, and to receive their data in a portable format, all of which HR systems need to be able to support in practice, not only in policy.
Special category data, a more sensitive tier that includes health information and, in an HR context, things like sickness absence detail or trade union membership, needs an extra, specific lawful basis beyond the ordinary conditions that apply to routine personal data.
HR data sits squarely inside this framework across the whole employee lifecycle, from recruitment records and right to work checks through performance, disciplinary and payroll data, which is why data protection has to be built into HR process design rather than treated as a separate compliance layer bolted on afterwards. The Information Commissioner’s Office (ICO) publishes current guidance on applying the regulation to employment data specifically.
Unfair Dismissal
Dismissing an employee without a fair reason, or without following a fair process, giving them the right to challenge the dismissal at an employment tribunal once they meet any qualifying conditions.
Most employees need a minimum period of continuous service before they can bring an ordinary unfair dismissal claim, but a defined set of reasons are treated as automatically unfair regardless of length of service, including dismissal connected to pregnancy, whistleblowing, asserting a statutory right, or several other specifically protected situations.
A dismissal generally needs both a fair reason, commonly conduct, capability, redundancy, a legal restriction that makes continued employment unlawful, or some other substantial reason, and a fair process appropriate to that reason. A fair reason handled through an unfair process, for example dismissing someone for poor performance without ever raising the concerns or giving them a chance to improve, can still lose at tribunal.
Remedies if a claim succeeds generally include reinstatement or re-engagement, restoring the person to their old job or a comparable one, though compensation is the far more common practical outcome, made up of a basic award reflecting age and service similar to redundancy pay, plus a compensatory award reflecting the employee’s actual losses, subject to a statutory cap.
A claim must generally be brought to the employment tribunal within a short statutory time limit from the dismissal, almost always after first going through Acas early conciliation, and GOV.UK publishes the current time limits and compensation caps that apply.
Where to Find United Kingdom Employment Rules
A short guide to which body actually publishes the current, figure specific detail behind United Kingdom employment rules, since the concepts in this glossary are explained in general terms while the numbers behind them are set, and regularly revised, by specific authorities.
For payroll, tax and National Insurance detail, the rates and thresholds behind PAYE, statutory payments, student loan deductions, the Apprenticeship Levy and benefits in kind, HM Revenue and Customs (HMRC) is the source to check, alongside the wider practical guidance published on GOV.UK.
For workplace relations questions, fair process, disciplinary and grievance handling, redundancy, and the standards a dismissal or a flexible working request is judged against, Acas publishes the current codes of practice and guidance that employers and employees alike are expected to follow.
For workplace pensions specifically, The Pensions Regulator publishes the current auto enrolment thresholds, minimum contribution levels and re enrolment timetable that every employer duty in this area is built on.
Where a dispute cannot be resolved directly or through Acas conciliation, the Employment Tribunal is the forum that ultimately decides it, and publishes its own current procedural rules, time limits and compensation limits. The practical habit worth building is to check the specific authority that owns a given figure or rule directly, rather than relying on a number remembered from earlier training that may since have changed.
Whistleblowing
The act of a worker raising a genuine concern about wrongdoing they have witnessed at work, protected in law as making a qualifying protected disclosure so long as it is made in the public interest through an appropriate channel.
The law protects disclosures about a defined set of wrongdoing categories, generally including a criminal offence, a breach of a legal obligation, a danger to health and safety, damage to the environment, a miscarriage of justice, or the deliberate concealment of any of these, rather than protecting complaints about purely personal grievances.
To count as a protected disclosure, the worker generally needs a reasonable belief that the information tends to show one of these categories of wrongdoing, and a reasonable belief that raising it is in the public interest, not simply a private dispute dressed up as a wider concern.
Protection applies most straightforwardly when the concern is raised internally through the employer’s own whistleblowing or grievance channel, or to a relevant prescribed regulator, with protection for wider disclosures, such as to the media, generally reserved for more limited circumstances.
A worker who suffers detriment, or is dismissed, because they made a protected disclosure can bring a claim regardless of length of service, reflecting how seriously the law treats retaliation against genuine whistleblowing. Acas publishes current guidance on running a whistleblowing policy and handling a disclosure fairly.
Working Time Regulations (WTR)
The United Kingdom rules that set limits on average working hours and guarantee minimum rest breaks, daily and weekly rest periods, and paid annual leave for workers.
At the centre of the regulations sits an average weekly working time limit, calculated over a reference period rather than judged shift by shift, so an occasional long week does not by itself breach the rules provided the average across the period stays within the limit. Workers can individually agree in writing to opt out of this average limit, but the opt out must be genuinely voluntary and can be withdrawn later.
Alongside the weekly limit, the regulations guarantee minimum daily and weekly rest periods between and across shifts, plus a minimum in work rest break once a shift runs beyond a set length, intended to protect against fatigue rather than simply being a paperwork formality.
Night workers receive extra protection, including limits on average night working hours and a right to a free health assessment before starting night work and periodically afterwards, reflecting the particular health and safety risks associated with working through the night on a regular basis.
The regulations are also the legal source of holiday entitlement, so questions about rest, maximum hours and paid leave are best understood as different faces of the same underlying framework rather than separate, unconnected rules. Acas and GOV.UK publish current practical guidance on applying the regulations.
Written Statement of Particulars
The statutory document a United Kingdom employer must give a worker setting out the core terms of their engagement, including pay, hours, holiday and notice, from the very first day of work.
The written statement exists so that nobody starts a job genuinely unsure of the basics: it must set out core terms such as pay and how often it is paid, normal working hours and days, job title or a description of the work, holiday entitlement, and where the job is based, among other required items.
It must also point the worker toward the employer’s disciplinary and grievance procedures, either by summarising them or by clearly signposting where the full versions can be found, so that nobody is left without a route to raise a concern or respond to one.
This is a day one right: it applies to workers as well as employees, and it does not depend on length of service the way some other statutory rights do, reflecting the basic principle that everyone is entitled to know the core terms of what they have agreed to from the outset rather than finding out later.
A written statement is evidence of what was agreed, but it is not the whole of the contract of employment itself, since other express and implied terms can exist alongside it. Acas publishes a current model statement and guidance on what must be included.
Zero Hours Contract
A United Kingdom working arrangement with no guaranteed minimum hours, under which an employer offers work as and when it is available and the individual is generally free to accept or turn it down.
A zero hours arrangement flexes in both directions: the employer is not committed to offering any set amount of work, and in most cases the individual is not committed to accepting whatever is offered, which is why it is commonly used in sectors with genuinely unpredictable demand such as hospitality, care and retail.
Working on a zero hours basis does not strip away statutory protections. Depending on their employment status, someone on this kind of contract can still be entitled to the National Minimum Wage or National Living Wage for hours actually worked, to paid holiday building up in proportion to time worked, and to protection from discrimination.
Exclusivity clauses, terms that try to stop someone on a zero hours arrangement from working for another employer even though they are offered no guaranteed hours themselves, are not permitted, on the basis that it is unfair to restrict someone’s ability to earn a living elsewhere while offering them no certainty of work at all.
This area continues to evolve, generally moving toward stronger rights around reasonable notice of offered shifts and some compensation when a shift is cancelled at short notice. Acas publishes current guidance on zero hours rights and good practice.