Can my employer force me to work 12-hour shifts?

If your shift ran through your break, your rota keeps you past a safe finish, or holiday pay is missing, start with the dates and records. Your employer owes you separate rights to rest and paid leave. Write down what happened today, save the rota and payslip, then use the steps below before a deadline runs out.

The 48-hour week is an average

The Working Time Regulations protect the worker, not the employer’s rota. Yet a zero-hours care worker, a warehouse picker or a hotel housekeeper can be pressured to accept long weeks just to keep shifts. If that is you, check the separate rules below and keep evidence before asking for a change.

The Working Time Regulations 1998 apply in England, Wales and Scotland to workers. That includes employees, agency, casual and zero-hours workers and apprentices. The weekly limit is usually averaged over any 17-week period, not applied separately to each week. Special cases, including trainee doctors, use a 26-week period. An applicable agreement or offshore rules may allow a longer period of up to 52 weeks. If you have worked there for less than 17 weeks, use the period since you started.

Count working time whether or not it is paid. Job-related training, required overtime, travel between clients and time on call at the workplace generally count. A normal commute to a fixed workplace and a lunch break with no work do not. A sleep-in at work may count even if you sleep. On-call time at home depends on the restrictions and on time actually spent working. See Acas on call and sleep-in shifts.

Two jobs count together. Working 35 hours for one employer and 20 for another produces a 55-hour weekly average if that pattern continues. Discuss the combined hours with both employers. Reduce them or, if eligible, agree a written opt-out. An employer must take reasonable steps to comply with the limit. Do not assume a second job is invisible. GOV.UK explains the calculation and second jobs.

The opt-out lifts one limit, not every safeguard

Adults can agree individually, voluntarily and in writing to work beyond the 48-hour average. Your employer may ask but cannot dismiss or disadvantage you for refusing. The opt-out does not cancel daily or weekly rest, breaks, night-work restrictions or paid holiday. Some workers in aviation, shipping, road transport and security on vehicles carrying high-value goods cannot use this opt-out; GOV.UK lists the sector exceptions.

1. Find your agreement. It may be a signed document or an agreed written contract term. An oral conversation is not enough.
2. Check the notice term. You can cancel even if you signed it as part of your contract. Give at least seven days’ written notice, or the longer period the agreement specifies, up to three months.
3. Keep a dated copy. Email is useful evidence. After the notice expires, the weekly limit applies again. Ask how the rota will change.

Breaks during shifts and between them

An adult working more than six hours is entitled to a single uninterrupted 20-minute break, taken during the working day, away from the workstation. It need not be paid unless the contract says otherwise. You cannot bank it to leave 20 minutes early, and a break interrupted by a call to work does not count. If the till queue, care call bell or warehouse target keeps pulling you back, note the time and who called you back. GOV.UK sets out when a break counts.

Finish at 8pm and, under the ordinary adult rule, the next shift cannot begin before 7am. Hospital cover, shift changes and genuine emergencies can fall within exceptions with equivalent compensatory rest. These exceptions do not give your employer standing permission to deny rest. Young workers have narrower exceptions, including a requirement that exceptional missed rest be made up within three weeks. See our guide to rest breaks.

Night work has a separate limit

You are normally a night worker if you regularly work at least three hours during the night period. The default is 11pm to 6am. A written agreement can set another period of at least seven hours that includes midnight to 5am; a relevant collective agreement can also define night work. One late finish does not normally qualify.

Regulation 6 limits a night worker’s normal hours to an average of eight per 24-hour period, usually calculated over 17 weeks. A relevant agreement can extend the reference period, up to 52 weeks. Weekly rest periods are deducted from the divisor; it is not a simple total divided by the number of shifts. Regular overtime may be included. You cannot opt out of this limit. If risk assessment or an agreement identifies special hazards or heavy physical or mental strain, the limit is eight hours in any 24-hour period in which night work is done. That limit is not averaged.

Employers must offer a free health assessment before night work starts and regularly afterwards. A worker can decline it. If night work causes health problems, the employer must transfer the worker to suitable day work where possible. GOV.UK explains the night-work rules; our shift-work and fatigue guide covers the health risks.

Holiday: 5.6 weeks of paid leave

A worker with a regular five-day week gets 28 days of statutory leave; a regular three-day week gives 5.6 × 3 = 16.8 days. An employer cannot round 16.8 down to 16. A six-day week would yield 33.6 days before the statutory 28-day cap. Your contract can give you more leave. Bank holidays can be included in the minimum: if an employer closes on eight bank holidays in England and counts them as leave, a five-day worker has 20 days left to book. There is no automatic right to take bank holidays off.

Holiday continues to accrue during sickness and statutory family leave. In Great Britain, for leave years starting on or after 1 April 2024, special rules for irregular-hours and part-year workers calculate statutory leave at 12.07% of actual hours worked in each pay period. The classification depends on the contract, not simply on being an agency worker or having a changing rota. Sickness and family leave have a separate look-back calculation.

Worker status and sector exceptions

A senior job title alone does not remove a managing executive’s protection. The exemption concerns work whose duration is unmeasured or genuinely self-determined. It affects weekly, night and rest limits, not the statutory right to paid leave. Other limited exceptions apply to domestic service and some emergency work. If your contract says “freelancer” but you must perform the work personally under substantial control, check your actual status. Worker status explained.

Agency workers generally receive working-time rights from day one. Separate equal-treatment rules on basic conditions normally start after 12 weeks in the same role. Ask whether you qualify for the special irregular-hours holiday method. Do not assume every agency placement uses it. Read the agency-worker guide.

Under-18s: tighter rules

For workers above school leaving age but under 18, the normal maximum is eight hours a day and 40 hours a week. Hours cannot be averaged over 17 weeks and there is no adult opt-out. They normally get 12 hours of daily rest, 48 hours of weekly rest and a 30-minute break when working more than 4½ hours. Limited exceptional-work provisions exist; the adult figures in the diagram are not their entitlements.

Night work is generally prohibited between 10pm and 6am, or between 11pm and 7am if the contract provides for that period. Specified sectors and exceptional circumstances permit limited exceptions, but work between midnight and 4am remains prohibited. GOV.UK covers young workers’ rest.

Scotland, Wales and Northern Ireland

The 1998 Regulations cover England, Wales and Scotland. The statutory minimum leave is the same in all three; the local calendar of bank holidays does not add days to the 28-day cap. Northern Ireland’s Working Time Regulations 2016 have broadly similar headline limits but are a different legal instrument. Do not apply the Great Britain-specific 12.07% accrual or rolled-up holiday-pay permission to a Northern Ireland contract.

Northern Ireland enacted its own 2023 working-time amendments, including normal-remuneration rules for holiday pay. Some reforms associated with 2024 therefore apply there too. For problems there, consult nidirect and the Labour Relations Agency. Hours enforcement can involve HSENI or local councils. The 2025 Employment Rights Act reforms described below concern Great Britain, not NI.

If your employer breaks the rules

Employers must keep adequate records for two years to show compliance with the weekly and night limits and other specified duties. They do not have to log every minute of every daily rest break, but they still have to give the break. Records of opt-outs and night-worker health-assessment offers also matter. Acas explains record-keeping and enforcement.

Since 6 April 2026, employers in England, Wales and Scotland must also keep adequate records showing compliance with statutory annual-leave and holiday-pay rules, including irregular-hours and part-year entitlements, payments for untaken leave when a worker leaves, and rolled-up holiday pay. They must retain these holiday records for six years from the date they are made, in any reasonably suitable format. This separate duty comes from regulation 16B, inserted by section 35 of the Employment Rights Act 2025 and commenced by SI 2026/323, regulation 3(1), read with regulation 3(8). Failure to comply is a criminal offence. In England and Wales, the Secretary of State, through the Fair Work Agency, can bring prosecutions for this record-keeping offence; that is separate from the planned holiday-pay enforcement powers below. Acas explains the holiday-record duty.

1. Write it down today. Keep rotas, clock-in records, payslips, messages and any opt-out or cancellation notice. Note the date, hours worked, break missed or holiday pay shortfall. Photograph or email records to yourself if access to the rota may disappear.
2. Raise it in writing. Ask your employer to correct the rota or pay and keep the reply. A grievance does not pause a tribunal deadline. Do not wait for the grievance outcome before getting advice.
3. Get support and choose the route. Ask your union: Unite or UNISON for care and health, USDAW for retail, or GMB for hospitality, logistics and cleaning. Citizens Advice, a law centre or Acas can explain next steps. Contact Acas for early conciliation before the tribunal deadline. For a minimum-wage shortfall, use the HMRC minimum-wage complaint form. That form also accepts working-time, gangmaster and labour-abuse reports; the Fair Work Agency replaced the GLAA on 7 April 2026. Report working-time health and safety breaches to the HSE or relevant local authority. For discrimination, including pregnancy-related treatment, get advice from Acas or Citizens Advice and contact the EHRC for information.

In Great Britain, most tribunal claims arising from a problem on or after 1 October 2026 must be started within six months minus one day; for a problem before that date, most retain three months minus one day. Acas notification within time can pause the clock. Scottish breach-of-contract claims do not move to the longer period until problems arising on or after 9 November 2026. Mark your deadline now and get advice before it expires. Our view: leaving workers alone to enforce missing holiday pay rewards employers who withhold it.

In force now, and still to come

The Employment Rights Act 2025 has not removed the weekly cap, the opt-out or rest rights. Its changes to tribunal deadlines and enforcement do affect how a worker can act when those rights are denied. The Fair Work Agency launched on 7 April 2026 for functions including minimum-wage and Great Britain agency regulation; it is not yet enforcing statutory holiday pay.

1. 1 Jan 2024GB holiday legislation changes

   Normal-remuneration and records rules change. The 12.07% accrual method and rolled-up holiday pay for eligible workers apply only to leave years starting on or after 1 April 2024.

2. 6 Apr 2026Holiday records, sick pay and family leave changes

   Employers in Great Britain must keep adequate statutory holiday records for six years from creation. Statutory Sick Pay waiting days and the lower earnings limit are removed; day-one paternity and unpaid parental leave start. Holiday still accrues during sickness.

3. 7 Apr 2026Fair Work Agency launches

   Its current functions include minimum-wage and employment-agency regulation; statutory holiday-pay enforcement is not yet in force.

4. 1 Oct 2026Most GB tribunal deadlines lengthen

   Six months minus one day for most problems arising from today; earlier problems generally keep their previous deadline. Scottish contract claims have a later start date.