Working Time Regulations UK: the 2026 employer guide

What are the Working Time Regulations 1998?

The Working Time Regulations 1998, usually shortened to WTR, are the main UK rules on working hours. They were introduced to implement the EU Working Time Directive and stayed in force after Brexit: they now form part of what the law calls "assimilated law" and apply in England, Scotland and Wales. Northern Ireland has its own, closely matching rules, the Working Time Regulations (Northern Ireland) 2016.

The Regulations apply to every employer, whatever its size. If you employ a single worker, they apply to you. They do three things:

• they cap working time, mainly through the 48-hour average weekly limit and the limits on night work;
• they give workers rights to rest and paid holiday: daily rest, weekly rest, rest breaks and 5.6 weeks of annual leave;
• they oblige employers to keep records that show the limits are being respected.

This guide sets out the rules as they stand in October 2026, in plain English. It is a general overview, not legal advice. For a specific situation, check the guidance on GOV.UK or ACAS, or speak to an employment adviser.

Who the Regulations cover

The WTR protect "workers", a wider group than employees. Besides staff on standard employment contracts, workers include most of the following:

• part-time and zero-hours staff, and casual or seasonal staff;
• agency workers (the agency, or whoever pays them, is usually treated as the employer for WTR purposes);
• young workers, meaning those above compulsory school age but under 18, who have stronger protections;
• some people described as "freelancers" or "contractors" who, in law, are workers because they must do the work personally and are not genuinely running their own business.

The genuinely self-employed are not covered. Some groups have their own rules or exceptions: parts of road, sea and air transport, certain activities of the armed forces and emergency services, and people whose working time is not measured or fixed because they decide it themselves, such as senior managers with full control over their hours. Domestic workers in a private household are excluded from the 48-hour limit and the night-work limits but keep their rights to rest and holiday.

Key limits and entitlements

The table below summarises the core rules. Young workers have tighter limits that cannot be averaged or opted out of.

How the 48-hour average is calculated

Add up the hours worked over the reference period, normally 17 weeks, and divide by the number of weeks. A worker can do 55 hours in some weeks and stay within the law if the average comes out at 48 or less. Days of annual leave, sick leave and maternity, paternity or parental leave do not count as zero: you leave them out and add the same number of days worked straight after the reference period.

The reference period can be extended to 26 weeks for some activities where continuity is needed, such as security, hospitals or agriculture, and to up to 52 weeks through a collective or workforce agreement for objective or technical reasons.

What counts as working time

Working time includes time spent working at the employer's disposal, job-related training, travel that is part of the job (for example between client sites) and on-call time when the worker must be at the workplace. The normal commute and unpaid lunch breaks where no work is done do not count. For workers with no fixed workplace, travel from home to the first appointment and back from the last one can count, so field teams need particular care.

Rest breaks in practice

The 20-minute break should be uninterrupted, and the worker is entitled to spend it away from their workstation if they have one. The law does not require it to be paid; that depends on the contract. Shift workers moving between shift patterns can have their daily or weekly rest adjusted, but they must then get equivalent compensatory rest. Split shifts and a late close followed by an early open are the classic way to break the 11-hour rule without noticing.

Record-keeping: what "adequate records" means

Regulation 9 requires employers to keep records that are adequate to show that the weekly working time limit, the night-work limits and the night-worker health assessment rules are being complied with, and to keep those records for two years from the date they were made.

The Regulations do not prescribe a format: paper, spreadsheets and digital systems are all acceptable, as long as the records are accurate and can be produced when needed. Since 1 January 2024, the Regulations also make clear that an employer does not have to record each worker's daily working hours if it can show compliance in another way, for example for staff on fixed hours who never work overtime.

In practice, for anyone with variable hours, overtime, shifts or more than one site, a daily record of start and finish times is still the simplest way to prove compliance. It is also what you need for other obligations: showing that you pay at least the National Minimum Wage, calculating holiday entitlement and holiday pay for irregular-hours workers, and settling a dispute about overtime.

Records for workers who have opted out

For workers who have signed an opt-out, the Regulations require you to keep an up-to-date record of who has opted out; they no longer require you to track those workers' hours against the 48-hour limit. You will still need their hours for pay, rest periods, holiday and any night work, so in practice most employers record everyone in the same way.

How long to keep records

Two years is the WTR minimum. Other rules, such as payroll and tax record requirements, often mean you keep related records for longer. Data protection law pulls the other way: do not keep personal data longer than you need it. A written retention schedule settles both, and our guide to GDPR and employee time tracking explains how to set one.

The 48-hour opt-out

The UK kept the individual opt-out from the 48-hour average limit. A worker aged 18 or over can agree to work more than 48 hours a week on average. The opt-out has conditions that are easy to overlook:

• It must be voluntary. You can ask, but a worker cannot be dismissed or treated unfairly for refusing to sign or for cancelling it. These protections come from the Employment Rights Act 1996.
• It must be in writing and agreed by the individual worker. It can cover a fixed period or run indefinitely.
• It can be cancelled. The worker can end it by giving at least 7 days' notice, or a longer period agreed in writing, up to a maximum of 3 months.
• It is not available to everyone. Young workers cannot opt out of their 40-hour limit, and some transport workers are covered by separate rules that do not allow it.
• It only covers the weekly limit. Rest periods, breaks, holiday and night-work limits still apply in full.

Keep each signed opt-out with your personnel records and review the list at least once a year. If a worker cancels, plan their rota so that their average comes back under 48 hours within the reference period.

Holiday entitlement and holiday pay

Workers are entitled to 5.6 weeks of paid holiday a year. For someone working five days a week that is 28 days, which is also the statutory maximum. Bank holidays can be counted as part of it. Part-time workers get a pro rata entitlement: someone working three days a week is entitled to 16.8 days (3 × 5.6).

Irregular-hours and part-year workers

For leave years starting on or after 1 April 2024, holiday for irregular-hours and part-year workers builds up at 12.07% of the hours worked in each pay period. For these workers only, employers may also use "rolled-up" holiday pay, paying an extra 12.07% with each payslip instead of paying when leave is taken. Both methods depend on accurate hours: without a reliable record, you cannot calculate the entitlement.

Holiday pay

For the first four weeks of leave, holiday pay must reflect normal pay, including regular overtime, commission and certain allowances. When pay varies, it is usually based on the average of the previous 52 paid weeks. A leave management app that keeps requests, approvals and balances next to the hours worked makes these calculations far less error-prone than a separate spreadsheet.

Enforcement and the risk of getting it wrong

The WTR are enforced in two different ways, depending on the rule:

• Limits and records: the weekly working time limit, night-work limits, health assessments and record-keeping are enforced by the Health and Safety Executive or the local authority, depending on the workplace. Inspectors can issue notices, and breaching these requirements can be a criminal offence punishable by a fine.
• Entitlements: rights to rest, breaks and paid holiday are enforced by the worker through an employment tribunal. Claims normally have to start within three months of the breach, after ACAS early conciliation. The tribunal can award the compensation it considers just and equitable, and unpaid holiday pay can also be claimed as an unlawful deduction from wages.

There is no fixed penalty table, and the cost of a dispute depends on the case. The practical risk for an SME is simpler: without reliable records, it is hard to show that hours, breaks and holiday were handled correctly, whether the question comes from an inspector, a tribunal or an employee who believes they were underpaid.

What is changing from 2026

The Employment Rights Act 2025 is the largest reform of UK employment law in years, and its measures are being brought in in stages from 2026. The core WTR rules described above are unchanged: the 48-hour average, the opt-out, rest periods, breaks and 5.6 weeks of holiday. Two parts of the reform are especially relevant to working time:

• A Fair Work Agency, which brings together the enforcement of several employment rights, including holiday pay, that were previously split between different bodies.
• A specific duty to keep records showing that holiday and holiday pay rules have been met.

Commencement dates can move, so check GOV.UK for which measures are in force when you read this. The safe assumption is that record-keeping expectations are going up, not down.

A six-step compliance checklist for SMEs

1. Map who is a worker. Include part-time, zero-hours, agency and young workers, and check anyone you treat as self-employed.
2. Check the averages. Pick a reference period, calculate each worker's average weekly hours and flag anyone approaching 48.
3. Review opt-outs. Make sure each one is signed, genuinely voluntary and on an up-to-date list.
4. Plan rotas around rest. Build in 11 hours between shifts, weekly rest and breaks, and watch late-close and early-open patterns.
5. Record hours reliably. Capture start and finish times when they happen rather than from memory at the end of the week, and keep them for at least two years.
6. Track holiday properly. Record entitlement, accrual for irregular-hours staff, leave taken and holiday pay.

How a digital time clock helps

Paper and spreadsheets can work for a very small team, and our free timesheet Excel template is a reasonable bridge. They become fragile once you have shifts, overtime or several sites: hours are written up later, errors creep in and nobody can see in time that someone is heading past 48 hours.

A digital time clock records the data at source. With NoBadge, employees clock in and out from their own smartphone, by GPS on building sites and field rounds or with a dynamic QR code at the entrance of a fixed site. Each record carries its time and position, hours and overtime are totalled automatically, managers get missed clock-in alerts, and leave requests and approvals sit in the same app.

NoBadge cuts attendance admin by around 70%, from about 10 hours a week to 2–3 hours, and exports the full history to Excel in one click, so the two-year WTR archive can sit with the rest of your payroll records.

No software makes you compliant on its own: you still need to plan rotas, respect rest periods and handle opt-outs correctly. What a good system does is give you accurate, timestamped records to show that you did.