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Can my boss keep changing my hours?
Published 17 July 2026
The idea of a traditional 9‑to‑5 job feels like something from the distant past because times have changed - but does that really mean your employer can keep changing your hours?
It’s said the standard 8-hour working day and 40-hour work week were largely pioneered by Henry Ford, founder of the Ford Motor Company, and implemented for his factory workers back in 1926 (1) [cited 17.7.26]
The specific phrase "working 9 to 5, what a way to make a living" was made famous in the 1980 Dolly Parton song.
Times have moved on. Workplace demands have changed, and technology has reshaped how many of us work. For a lot of employees, some level of flexibility in their hours is now required, if not expected.
Your hours of work are typically agreed in your contract. You cannot work more than 48 hours a week on average, normally averaged over 17 weeks (2) [cited17.7.26].
So if your boss keeps changing, or wants to change, your hours, or suddenly tells you your shift pattern is being “reviewed,” it’s natural to stop and wonder whether they can actually do that. And more importantly, whether it’s even fair.
To answer that, let’s give you some clear explanations, real examples, and the latest updates under the Employment Rights Act 2025 (ERA) (3) [cited 17.7.26]
- The quick answer
Your employer can change your hours but to do so it must follow a fair process, consult you properly, and act reasonably.
However, there are sometimes when your employer absolutely cannot change your working hours, especially if your contract is clear or the change is unfair, discriminatory, or just forced on you without any meaningful consultation.
The long answer really depends on what is in your contract, your working pattern and the new rules being introduced in under the ERA.
- What your contract says is crucial
Your contract is the starting point. It should tell you:
- Your normal working hours.
- Your shift pattern.
- Whether your hours can change.
- How much notice you should get.
- Whether flexibility is part of the role.
Your contract could say your hours are fixed, or that they may vary.
If it makes clear that your hours are fixed, then your employer cannot keep changing them without your agreement.
On the other hand, if your contract says your hours “may vary,” it must still act reasonably and consult you. The agreement does not mean they can be changed as and when your employer wants to do so.
Your contract might be vague, unclear, or doesn’t mention hours at all, if this is the case then your employer must still follow a fair process and consider your personal circumstances before making changes.
- What counts as a “reasonable” change?
What is reasonable is often debatable but in this situation it can be considered a change that is:
- Discussed with you first.
- Takes your personal circumstances into account.
- Gives you proper notice.
- Doesn’t cause serious hardship.
- Isn’t discriminatory.
- Isn’t used as punishment.
The clearest sign a change is unreasonable is when it causes disruption in your life in a way your employer should be aware of e.g. affecting childcare, medical needs, religious commitments, or travel arrangements.
If your boss keeps changing your hours without notice, or uses rota changes to pressure you, punish you, or push you out, that is not reasonable.
- Your employer must consult you
Consultation means:
- Talking to you.
- Asking for your views.
- Considering your situation.
- Exploring alternatives.
- Giving you time to respond.
It does not mean, as can happen:
- Telling you the decision is already made.
- Giving you a rota change with no discussion.
- Pressuring you to accept.
- Ignoring your concerns.
If any change is put in place, and it has not been meaningfully discussed with you or done with your agreement, that’s perhaps the clearest sign it is unfair.
- Can my boss change my hours at short notice?
This can, and does happen a lot, short‑notice changes are one of the biggest complaints workers have. It does seem to be a particular issue in some sectors such as health and social care, retail, hospitality and zero‑hours roles.
Under current law, short‑notice changes are not automatically illegal, but they must still be reasonable. However, the ERA introduces new protections that make short‑notice changes much harder for employers to justify.
- What ERA 2025 changes
As we have covered in this space previously the ERA brings in significant changes to working hours, especially for those on zero‑hours or low‑hours contracts. The changes will stop what has for a long time been seen as “one‑sided flexibility,” where employers take all the flexibility and workers take all the risk.
Here are the key changes relevant to working hours:
Guaranteed hours contracts
Employers will have a legal duty to offer guaranteed hours to workers who regularly work above their contracted hours over a set reference period.
Reasonable notice of shifts
Employers will have to give reasonable notice of shifts.
Compensation for cancelled shifts
If your shift is cancelled, moved, or cut at short notice, you will be entitled to compensation.
Protection against exploitative zero‑hours arrangements
The government has committed to ending “one‑sided flexibility” and banning exploitative zero‑hours contracts.
Stronger flexible working rights
The ERA strengthens the day‑one right to request flexible working. Employers must explain their reasons clearly and reasonably if they refuse.
The Fair Work Agency (FWA)
FWA will act to protect workers, support fair competition and ensure employers comply with the law. This includes tackling exploitation, ensuring tribunal awards are paid, and using its legal powers to investigate, penalise and prosecute where needed (4) [cited 17.7.26]
This will mean that your employer cannot simply change your hours as and when it feels like it. It will need to:
- Give you proper notice.
- Offer guaranteed hours if you regularly work them.
- Pay compensation for last‑minute changes.
- Justify any refusal of flexible working.
- Follow fair procedures.
These changes are designed to give workers more stability, predictability, and protection.
- When changing your hours becomes unlawful
If a change to your job breaches your contract, is discriminatory, feels like retaliation for raising concerns, is used to push you out, causes serious hardship that your employer ignores, or is made without proper consultation or notice, then you may be being treated unlawfully. This could also be the case if your employer disregards your flexible working rights. If any of these apply, you may have grounds explore a legal claim, but first you should raise a grievance (5) [cited 17.7.26].
- What to do if your hours keep changing
The best way to deal with this is to first check your contract for anything about hours, flexibility or notice, keep a record of every change and how it affects you, and in the first instance raise the issue informally with your manager.
If nothing changes or you feel ignored, put your concerns in writing and consider making a flexible working request, which is now a day‑one right under the ERA (6) [cited 17.7.26].
If any changes are unfair, discriminatory or causing harm, you may need to raise a grievance. You can also seek support from ACAS or a trade union.
- FAQs
Can my boss change my hours without asking me?
They must consult you. Sudden changes without discussion are not fair.
Can I refuse new hours?
Yes, if the change is unreasonable, discriminatory, or breaches your contract.
Can they reduce my hours?
Only with consultation and a fair reason. Cutting hours to punish you is unlawful.
Can they increase my hours?
Not without agreement, unless your contract allows it and they act reasonably.
Does ERA protect me if I’m on a zero‑hours contract?
Yes. You will gain rights to guaranteed hours, reasonable notice, and compensation for cancelled shifts.
- Finally
You may feel powerless and as if you have no choice if your boss wants to keep changing your hours whenever they want, but they cannot do it. This is because they must act reasonably, consult you properly, and follow the law. The good news is the ERA strengthens your rights even further, especially around predictable hours, fair notice and protection from exploitative practices.
If your hours keep changing and it’s affecting your life, you’re not being difficult. You’re asking for basic fairness and the law is increasingly on your side.
