The Working Time Regulations 1998 (Statutory Instrument 1998/1833) brought the EU Working Time Directive into UK law one year late and with significant carve-outs. They remain in force today, post-Brexit, as retained EU law. They still bind every UK employer, with one notable difference: the European Court of Justice no longer governs how the UK courts interpret them.
This post walks through what the WTR actually require, where the UK's opt-out works in practice, and what record-keeping duties survive after Brexit.
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Quick Reference
| Rule | Limit | Reference |
|---|---|---|
| Weekly working time cap | 48 hours (average over 17 weeks; opt-out available) | Reg. 4 |
| Daily rest | 11 consecutive hours | Reg. 10 |
| Weekly rest | 24 hours every 7 days, or 48 hours every 14 days | Reg. 11 |
| Rest break | 20 minutes after 6 hours | Reg. 12 |
| Annual paid leave | 5.6 weeks (28 days incl. bank holidays for 5-day week) | Reg. 13, 13A |
| Night work limit | 8 hours per 24 (average) | Reg. 6 |
| Young workers cap | 8 hours per day, 40 per week | Reg. 5A |
The Core Rules
Regulation 4: 48-Hour Weekly Cap
The headline rule. A worker's average working time, including overtime, must not exceed 48 hours per seven-day period. The reference period is normally 17 weeks; collective agreement can extend it to 52 weeks for specific sectors.
Workers can opt out by signing a written agreement. The opt-out is individual; it cannot be imposed via the contract of employment. Workers can withdraw the opt-out with at least 7 days notice (up to 3 months if the contract specifies a longer notice period). No detriment is permitted for refusing or withdrawing.
The opt-out is the single biggest practical difference between UK employment and most of the EU. In sectors like hospitality, healthcare, and consultancy, opt-out coverage above 50 percent of staff is common.
Regulation 10: Daily Rest
11 consecutive hours between the end of one working day and the start of the next. No averaging, this is a hard floor. A worker who finishes at 22:00 cannot start before 09:00 the next day.
Exception: when the daily rest is interrupted by emergencies or for shift workers whose rotas legitimately require it, compensatory rest must be provided as soon as reasonably practicable.
Regulation 11: Weekly Rest
Two ways to comply, employer's choice:
- 24 consecutive hours in every 7-day period, or
- 48 consecutive hours in every 14-day period
For shift work, the weekly rest aligns with the rest-day cycle. The British retail and care sectors often use the fortnightly version.
Regulation 12: Rest Breaks During the Day
20 minutes of rest break if the working day exceeds 6 hours. The break must be uninterrupted, taken away from the workstation, and not split into shorter chunks.
20 minutes is the EU minimum; UK collective agreements often go further (often 30 or 45 minutes) for industries with longer days.
Regulation 13: Paid Annual Leave
5.6 weeks of paid leave per year. For a five-day worker, that's 28 days, which can include bank holidays (8 in England and Wales, 9 in Northern Ireland, 8 or 9 in Scotland depending on local arrangements).
The 5.6 weeks is statutory minimum; many employment contracts grant more. The leave entitlement accrues at 1/12th per month for the first year of employment.
Record-Keeping: What's Actually Required
The WTR require employers to keep records "adequate to show" that the 48-hour weekly limit and the night work limit are being complied with. Regulation 9 requires retention for two years.
In practice this means:
- Records of opt-out workers. Who signed, when, and when they could withdraw.
- Records of hours for non-opt-out workers. Sufficient to demonstrate compliance with the 48-hour average.
- Records of night workers. Hours and any health assessments.
The WTR do not specify a format. Spreadsheets, time tracking software, and paper records all qualify. The HSE and local authority inspectors can demand the records on request.
CCOO and the UK
The ECJ's CCOO ruling (Case C-55/18, 14 May 2019) required member states to oblige employers to record daily working time for all workers, not just those who hadn't opted out. The UK did not implement CCOO before Brexit, and the WTR's record-keeping rules remain limited to opt-out workers and night workers. Post-Brexit, the UK is not bound by CCOO going forward.
That said, UK case law since 2019 has cited CCOO as persuasive authority in several wage-and-hour claims. Employers tracking only opt-out and night workers expose themselves to claims they cannot rebut.
Special Cases
Young Workers (Regulation 5A)
Workers between school-leaving age and 18 get tighter limits:
- 8 hours per day
- 40 hours per week
- 12-hour daily rest
- 48-hour weekly rest
- 30-minute break after 4.5 hours
These rules cannot be opted out of.
Mobile Road Transport Workers
Covered by the Road Transport (Working Time) Regulations 2005, not the WTR. Drivers of vehicles over 3.5 tonnes are subject to EU drivers' hours rules.
Aviation, Sea, Inland Waterways
Sector-specific regulations apply. Pilots and aircrew, seafarers, and inland waterway workers have their own regimes.
Self-Employed
The WTR cover "workers", a category that includes employees and certain contractors. Genuinely self-employed people are outside the WTR. The "limb (b) worker" category (a 2018 Supreme Court development from the Pimlico Plumbers case) brings many gig workers within scope.
Enforcement and Penalties
Two bodies share enforcement:
- HSE (Health and Safety Executive) for the working time and rest provisions (Regulations 4 to 7 and 10 to 12)
- HMRC for the paid leave provisions, via the National Minimum Wage enforcement team
Penalties:
- Criminal prosecution under HSE enforcement: fines are unlimited on summary conviction in the Magistrates' Court (the former GBP 5,000 statutory maximum was removed by section 85 of the LASPO Act 2012, in force from 12 March 2015), as they already are in the Crown Court
- Civil claims at the Employment Tribunal: workers can claim unpaid wages or compensation for breach
- For paid leave: workers can claim unpaid holiday pay; tribunal awards can include interest and uplift
HSE enforcement actions on WTR are relatively rare; tribunal claims by workers are more common. In 2023 to 2024 the Employment Tribunal received over 8,000 working time claims.
Post-Brexit: What Has Changed
The Retained EU Law (Revocation and Reform) Act 2023 originally proposed a "sunset" clause that would have revoked retained EU law by the end of 2023. After amendment, the sunset was dropped; instead, the government can choose to revoke or amend specific provisions.
The UK government's consultation in 2023 proposed:
- Simplifying record-keeping by formally exempting non-opt-out, non-night workers (this never became law)
- Allowing the rolled-up holiday pay practice for irregular-hours workers (became law from 1 April 2024 for leave years starting after that date)
- Clarifying how leave accrues for irregular-hours workers
Substantive WTR provisions (48-hour cap, rest periods, paid leave) remain unchanged. Watch for further reform; the policy direction has been consistently in favor of business flexibility.
Practical Compliance Checklist
For employers operating in the UK today:
- Identify your opt-out workers. Get the opt-out in writing; keep the form on file.
- Track hours for everyone. Even where the WTR technically only require records for opt-out and night workers, tracking everyone closes evidence gaps in tribunal claims.
- Schedule daily and weekly rest deliberately. A six-day work week scheduled with insufficient rest is a regulatory and welfare risk.
- Honor the 20-minute break. Make sure it's actually away from the workstation and uninterrupted.
- Pay holiday correctly. This is where most claims succeed; calculation of holiday pay for irregular workers is a frequent dispute area.
- Retain records for two years. Hard requirement under Regulation 9.
Common Questions
Can I require all employees to sign the opt-out? You can ask, but you cannot require it. Refusing to sign cannot be a basis for any detriment.
Do bank holidays count toward the 5.6 weeks? Yes, unless your contract says otherwise. The 5.6 weeks is a total figure that can include bank holidays.
Does the WTR apply in Northern Ireland? Yes, with minor variations under the Working Time Regulations (Northern Ireland) 1998.
What about Scotland? WTR applies UK-wide. Some bank holiday dates differ; the 5.6-week total is the same.
Are zero-hours workers covered? Yes, as "workers" under the WTR. They accrue holiday entitlement on a pro-rata basis.
Summary
- The Working Time Regulations 1998 implement the EU Working Time Directive in UK law
- 48-hour weekly cap (with opt-out), 11-hour daily rest, weekly rest, 20-minute break after 6 hours
- 5.6 weeks paid annual leave (28 days for a 5-day worker, may include bank holidays)
- Record-keeping for two years; CCOO ruling not implemented in UK
- Enforcement split between HSE (working time) and HMRC (paid leave)
- Post-Brexit reforms have so far been limited
Sources
- Working Time Regulations 1998 SI 1998/1833 on legislation.gov.uk
- HSE Working Time Regulations guidance
- GOV.UK Working Time hub
- Retained EU Law (Revocation and Reform) Act 2023
- Pimlico Plumbers Ltd v Smith [2018] UKSC 29
Where to Go Next
- The EU Working Time Directive explained for the directive the WTR implements
- The ECJ CCOO ruling: why time tracking is mandatory for the ruling the UK did not implement
- How to keep audit-proof timesheet records for the practical record-keeping side