UK Working Time Regulations (2026/27): 48-Hour Cap, Rest Breaks, Opt-Out
UK Working Time Regulations 1998 (WTR) for 2026/27: 48-hour average weekly working cap, individual opt-out (revocable on 7 days notice), 11-hour daily rest, 24-hour weekly rest, 20-minute breaks for shifts over 6 hours, exclusions, night worker rules, post-Brexit retained EU law status + Employment Rights Bill reforms.
Overview
Practical guide to UK Working Time Regulations 1998 for 2026/27: 48-hour average weekly working cap, individual opt-out (revocable on 7 days notice), 11-hour daily rest, 24-hour weekly rest, 20-minute breaks for shifts over 6 hours, exclusions, night worker rules, what counts as "working time" post-Tyco + Matzak, and post-Brexit retained EU law status.
2026/27 working time limits at a glance
| Right | Limit | Notes |
|---|---|---|
| Maximum average weekly hours | 48 hours | Averaged over 17-week reference period (longer for some sectors). Can opt out individually. |
| Daily rest break | 11 consecutive hours | Between end of one working day + start of next. Workers under 18: 12 hours. |
| Weekly rest break | 24 consecutive hours per 7 days | Or 48 hours per 14 days. Workers under 18: 48 hours per 7 days. |
| In-shift break | 20 minutes | For shifts longer than 6 hours. Workers under 18: 30 minutes for shifts over 4.5 hours. |
| Night worker average | 8 hours per 24 | Averaged over 17 weeks. "Night worker" = ≥3 hours of normal work between 11pm-6am most days. |
| Annual leave | 5.6 weeks (28 days for 5-day week) | See separate Working Time Regulations holiday pay guide. |
What counts as working time
Counts
- Compulsory training
- Business travel between client sites
- Mobile workers\' travel from home to first job + last to home (Tyco 2015)
- On-call at workplace
- On-call at home if heavily constrained (Matzak 2018)
- Working through breaks if required
Doesn\'t count
- Normal commute to a fixed workplace
- Unpaid lunch breaks away from work duties
- Voluntary training in own time
- On-call at home with full freedom to use time
- Sleep-in care where rest is the primary purpose (Royal Mencap Society v Tomlinson-Blake 2021)
The individual opt-out
- In writing, voluntary, revocable - the opt-out form must be signed by the worker, not imposed as a condition of employment.
- 7 days notice to revoke (or longer if contractually agreed up to 3 months). Revocation doesn\'t need employer agreement.
- Cannot opt out of rest breaks - only the 48-hour weekly cap.
- Detriment for refusing to opt out is automatically unfair - no service requirement (Section 101A ERA 1996).
- Employer must keep an opt-out list - retained for 2 years.
- Some sectors prohibit opt-out - notably mobile workers in road transport under Road Transport (Working Time) Regulations 2005.
Related guides
- UK Holiday Pay Calculation 2026/27 - 5.6 weeks + pay components.
- UK Employment Contract Red Flags 2026/27 - unpaid overtime clauses.
- UK Flexible Working Request 2026/27 - reducing hours.
- UK National Minimum Wage 2026/27 - hours × pay floor.
Frequently asked questions
How is the 48-hour week calculated?
Averaged over a 17-week "reference period" (extendable to 26 weeks by collective agreement, 52 weeks for some sectors). All working time counts - including overtime, training, business travel between client sites (not commute to first/last site), on-call time when required to be at workplace. Excluded: commute, unpaid lunch breaks, time on call but at home + free to use as you wish. The 48-hour average applies per employer - working 50 hours one week + 46 the next is fine if the 17-week average is ≤48.
What counts as "working time"?
Section 1(2) WTR + EU case law. Working time = time during which (a) the worker is at the employer's disposal + (b) carrying out activity or duties for the employer + (c) any periods of compulsory training. Includes: training, business travel between client sites, on-call when required to remain at workplace (Sindicato de Médicos v Conselleria de Sanidad [2000]), some forms of on-call at-home (post-Matzak [2018] - depends on constraint). Excludes: lunch breaks (unless required to remain at desk), commute (Tyco Integrated Security 2015 changed this for mobile workers without a fixed workplace).
Can I opt out of the 48-hour limit?
Yes, individually + in writing. The "individual opt-out" must be (a) voluntary - the employer cannot make it a condition of employment, (b) in writing, (c) revocable on 7 days notice (or longer if contractually agreed up to 3 months). You cannot opt out of the rest break provisions - only the weekly hour cap. Some sectors prohibit opt-out (e.g. mobile workers in road transport under separate rules). Some EU jurisdictions are eliminating opt-outs; UK has retained them post-Brexit.
What about rest breaks within the working day?
Regulation 12 WTR: 20 minutes uninterrupted break for any shift longer than 6 hours. The break must be AWAY from the workstation - eating at your desk while still responsible for the work doesn't count. Cannot be at the start or end of the shift (must break it up). Break can be unpaid. Some collective agreements specify longer or paid breaks. Workers under 18: 30 minutes break for shifts over 4.5 hours.
What about night workers?
A "night worker" works at least 3 hours during the "night period" (11pm-6am by default, can be modified by agreement) on the majority of working days. Specific protections: (a) Average 8 hours per 24-hour period over 17 weeks. (b) Free health assessment offered before starting + at regular intervals. (c) Right to transfer to day work where medical reasons require. (d) Special hazardous work (Regulation 6(7)) - the 8-hour limit is absolute, not averaged. Common night worker sectors: healthcare, hospitality, security, manufacturing shift work, logistics.
What sectors are excluded?
Partial or full exclusions apply to: (a) Senior management with "autonomous decision-making powers" - excluded from the 48-hour cap but still entitled to rest breaks + holiday. (b) Sea, air, road, inland waterway transport - covered by sector-specific rules (Driver Hours, Road Transport (Working Time) Regulations 2005). (c) Doctors in training - now covered (was previously excluded). (d) Armed forces, police, certain emergency services - partial. (e) Workers with unmeasured working time who choose their own hours. Many "excluded" workers still retain some WTR protections - check the specific exclusion regulation.
How do I enforce my rights?
Two enforcement routes: (a) HSE (Health + Safety Executive) for the weekly hours + night worker provisions - criminal offence + improvement / prohibition notices. (b) Employment Tribunal for individual rights - rest breaks, paid leave, refusal of opt-out coercion. Time limit 3 months less 1 day. Compensation: "just + equitable" - typically uplift on lost wages + injury to feelings for serious cases. Detriment for refusing to opt out is automatically unfair (Section 101A ERA 1996) - no service requirement.
Is WTR going to be replaced after Brexit?
The Retained EU Law (Revocation + Reform) Act 2023 initially threatened to sunset WTR end of 2023 but the government withdrew the sunset clause for most employment law. The Working Time (Amendment) Regulations 2023 (effective April 2024) trimmed some recording requirements + introduced rolled-up holiday pay for irregular hours workers. The 48-hour cap + opt-out + rest breaks remain. The Employment Rights Bill 2024 doesn't propose to repeal them but does add other employment protections. Practical: WTR core protections are stable; technical changes around holiday + recording continue.