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Compressed Hours Contract UK: Guide for Employers

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Part ofUK Employment Law Guide for Employers (2025)

Updated June 2026 · England & Wales
Flexible working has moved from a fringe perk to a mainstream expectation, and the way employers structure working patterns has had to catch up. One arrangement that keeps coming up in conversations with business owners is the compressed hours contract, where someone works their full weekly hours but fits them into fewer days. Done well, it can suit both sides: the employee gets a longer weekend or a weekday to themselves, and the business keeps the same output without changing headcount. Done badly, it causes confusion about overtime, holiday entitlement, rest breaks and pay. This page walks through what a compressed hours employment contract actually is under English law, what it needs to cover, and the practical issues that tend to trip people up when they set one up for the first time.

What this document is

A compressed hours employment contract is a written agreement where an employee works their contractual weekly hours across fewer working days than the standard five. A typical example is someone working 37.5 hours across four longer days instead of five shorter ones, or a nine-day fortnight where they get every other Friday off.

The total paid hours stay the same, and so does the salary. It is a form of flexible working, not a reduction in hours or pay. Like any contract of employment in England and Wales, it has to meet the written statement requirements in section 1 of the Employment Rights Act 1996, which sets out what terms must be given to the employee on or before day one.

It also needs to work alongside the Working Time Regulations 1998, which govern daily rest, weekly rest, and maximum weekly hours. The distinctive feature is the working pattern clause, which sets out exactly which days are worked, the start and finish times, and how breaks fit around longer shifts. Everything else, holiday, notice, sick pay, conduct, tends to mirror a standard employment contract.

How to use this document

  1. Work out the weekly hours and how they will be distributed. Before drafting anything, decide how many total hours the role requires each week and which days the employee will work. A 40-hour week compressed into four days means ten-hour days, which has knock-on effects for rest breaks and energy levels. Map the pattern on paper first and check it works operationally.
  2. Check the pattern against the Working Time Regulations. Employees are entitled to 11 hours of uninterrupted rest between working days and at least one full day off per week. Longer shifts also trigger longer in-shift rest breaks. If the compressed pattern pushes close to these limits, adjust the schedule before you put it in writing rather than after.
  3. Draft the written statement and working pattern clause. Prepare the section 1 written statement covering job title, pay, hours, holiday, notice, place of work and the rest. Add a specific working pattern clause that spells out the compressed schedule in detail, including what happens on bank holidays that fall on a non-working day and how overtime is treated.
  4. Recalculate holiday entitlement in hours, not days. This is where many employers slip up. If someone works four ten-hour days, a day of annual leave uses ten hours of entitlement, not eight. Converting the statutory 5.6 weeks into hours avoids arguments later and keeps the arithmetic clean when the pattern changes or the person leaves.
  5. Issue the contract, get it signed, and diarise a review. Give the employee the contract before or on their first day and keep a signed copy. Set a review point, often three to six months in, to check the pattern is working for both sides. Compressed hours look great on paper but can be tiring in practice, so an honest check-in helps catch problems early.

Common questions

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Common questions

Q Is a compressed hours contract the same as part-time working?
No. Part-time working means fewer total hours than a full-time role. Compressed hours keeps the total weekly hours the same as a full-time contract, but fits them into fewer days. Pay and holiday entitlement stay at full-time levels, which is an important distinction both for payroll and for how the role is described in job adverts and internal documents.
Q Does an employee have a right to compressed hours?
Employees with the relevant qualifying service can make a statutory flexible working request, and compressed hours is one of the patterns they can ask for. The employer has to consider the request reasonably and can only refuse on specified business grounds. That is a right to ask and have the request properly handled, not an automatic right to the arrangement itself.
Q How does holiday work when someone works longer days?
The cleanest approach is to calculate and record annual leave in hours rather than days. That way, a day off always uses the same number of hours as the person would have worked that day. If you stick to counting in days, longer working days can quickly create disputes about whether leave is being used fairly, especially around bank holidays.
Q What happens if a bank holiday falls on a non-working day?
This needs to be dealt with in the contract, because the default position is not obvious. Many employers give a pro-rata bank holiday entitlement in hours, so the employee gets the same proportion of paid bank holidays as a five-day worker. Writing the method into the working pattern clause avoids awkward conversations every December.
Q Can the employer change the working pattern later?
Changing contractual terms generally needs the employee's agreement, and the working pattern in a compressed hours contract is contractual. You can build in a limited flexibility clause allowing temporary changes for business needs, but a permanent switch back to a standard five-day week usually requires consultation and consent, or a formal change process if consent is not given.
Q Are there health and safety considerations with longer shifts?
Yes. Longer working days can increase fatigue, particularly in physically demanding roles or where concentration matters, such as driving or using machinery. Employers should think about whether the compressed pattern is genuinely safe for the role, build in proper rest breaks, and be willing to revisit the arrangement if it is not working in practice.
Q Does overtime work differently under a compressed hours contract?
The core contractual hours are higher on each working day, so the threshold for anything counting as overtime is reached later in the day. The contract should make clear whether overtime is paid, taken as time off in lieu, or not available at all, and how it is calculated on non-working days. Clarity upfront saves arguments later.
If you're dealing with this kind of situation, speak to an experienced legal adviser who can walk you through it — from £89.

Sources

This guide is based on primary UK law and official guidance.

Brad Askew, Solicitor (non-practising)

Written & reviewed by

Brad Askew Solicitor (non-practising)

Brad is on the roll of solicitors of England & Wales but does not hold a practising certificate and does not provide legal advice. LegalDocuments.co.uk is not a law firm and does not provide regulated legal advice.

Legal disclaimer
This article is for general information only. It is a tool to help you find your way — not legal advice, and not a substitute for speaking to a qualified adviser about your situation.