You're on your fourth night in a row, your rota just changed again, and you're wondering whether any of this is actually allowed.
In the UK and across the EU, a lot of it is regulated. Night workers get specific protections on hours, health checks, and rest that day workers don't. What most people don't get, by law at least, is extra pay. That comes from your contract, not the statute book.
Here's how the rules work, in plain English. It's general information, not legal advice, and there are exceptions for some jobs, so check the specifics with your HR team, union, or an adviser.
Are You a "Night Worker"?
The protections below only apply if you legally count as a night worker, so start here.
In the UK, night time is 11pm to 6am unless your contract sets a different period. Any agreed period has to be at least 7 hours long and include midnight to 5am. You're a night worker if you regularly work at least 3 hours during that window (Acas, night workers).
In the EU, the Working Time Directive uses the same idea: night time is at least 7 hours, set by each country, and always includes midnight to 5am. A night worker normally works at least 3 hours of their working day in that period (Working Time Directive 2003/88/EC).
In practice, if you work a standard night shift like 10pm-6am or 7pm-7am, you almost certainly qualify. If you occasionally do a late shift that finishes at 1am, you might not.
How Many Hours Can a Night Worker Work?
This is the rule that surprises most people.
UK night workers shouldn't work more than an average of 8 hours in any 24-hour period, usually averaged over 17 weeks. It's an average, not a cap on each shift, which is how 12-hour night rotas stay legal: three 12-hour nights and four days off averages out well under 8 hours a day.
Two details matter:
- You can't opt out of the night work limit. You can opt out of the separate 48-hour weekly maximum in the UK, but not out of the 8-hour night average.
- Hazardous or heavy work gets a hard cap. If your night work involves special hazards or heavy physical or mental strain, you can't work more than 8 hours in any 24 hours in which you do night work. No averaging.
The EU rule is the same in principle: night workers' normal hours can't exceed an average of 8 hours in 24, with a strict 8-hour limit for hazardous or heavy work. Each country sets the details, including the averaging period.
Free Health Assessments
Night work is hard on the body, so the law builds in check-ups.
In the UK, your employer must offer you a free health assessment before you start working nights, and then at regular intervals, to check you're fit for night work (Acas). It's usually a questionnaire, sometimes followed by a proper medical if something comes up. You don't have to take it, but it has to be offered.
Across the EU, night workers are likewise entitled to a free health assessment before starting and at regular intervals afterward.
If Night Work Is Making You Ill
If a doctor confirms you have health problems connected to night work, your employer should transfer you to suitable day work where possible. That applies in the UK and under the EU directive.
"Where possible" is doing a lot of work in that sentence. Not every employer has day roles you can move to. But it's a real protection, and it starts with a letter from your doctor linking your symptoms to night work.
If you're struggling but haven't reached that point, it's worth looking at whether the problem is the shift pattern or the way your sleep is set up around it. Our guide to shift work sleep disorder covers the symptoms and treatment, and the night shift sleep schedule calculator can help you build a better sleep window around your actual rota.
Pregnancy and Night Work
In the UK, if your doctor or midwife gives you a certificate saying night work is a risk to you or your baby, your employer must offer you suitable day work on the same terms. If there isn't any, they must suspend you on full pay for as long as necessary (GOV.UK, pregnant employees' rights).
EU countries have similar protections for pregnant and breastfeeding workers, though the exact process varies by country.
Rest Breaks and Time Off Between Shifts
Night workers get the same rest rights as everyone else, which is easy to forget when you're used to working around the clock:
- A 20-minute break if you work more than 6 hours (UK). EU countries set their own minimum break length.
- 11 hours' rest between working days. Finish at 7am and you shouldn't start again before 6pm.
- Weekly rest of 24 hours in each 7 days, or 48 hours in each 14 days in the UK. The EU minimum is 24 hours plus the 11-hour daily rest.
- A 48-hour average working week, which UK workers can opt out of in writing and EU countries apply with varying flexibility.
These can be varied for some jobs and by collective agreement, often in exchange for "compensatory rest" later. If your rota regularly leaves you with less than 11 hours between shifts, it's worth asking which exception your employer is relying on.
Do You Get Paid More for Working Nights?
In the UK, not by law. There's no statutory night premium. You must be paid at least the National Minimum Wage for every hour, but anything above that for night work comes from your contract, a collective agreement, or established practice at your workplace (Acas).
That said, plenty of employers pay extra, as a shift allowance, a percentage premium, or an "unsocial hours" payment. And once it's in your contract, it's legally enforceable like the rest of your pay.
In the EU, the directive itself doesn't require a night premium either, but some countries do. Germany is a good example: if there's no collective agreement covering it, employers must give night workers an appropriate pay supplement or an appropriate number of paid days off (Arbeitszeitgesetz, section 6). Germany's Federal Labor Court has treated around 25% of gross hourly pay as the benchmark for an appropriate supplement, and more for permanent night work.
If you're negotiating night pay, it helps to know what the premium is actually worth over a year. The shift differential calculator turns a percentage or flat premium into weekly, monthly, and yearly figures, and our guide to negotiating shift differential pay covers how to ask for more.
Can Your Employer Make You Work Nights?
It depends on your contract. If it says you can be required to work nights or rotating shifts, then generally yes. If it doesn't, moving you onto nights is a change to your terms, which usually needs your agreement.
In the UK, you can also make a flexible working request to change your hours, including moving off nights, from your first day in a job. Your employer has to consider it properly and can only refuse for specific business reasons.
Workers under 18 have extra protection: in the UK they generally can't work late at night, with limited exceptions in certain sectors.
What to Do If the Rules Aren't Being Followed
Start with a conversation or an email, since plenty of rota problems are mistakes rather than policy. If that doesn't work:
- Keep a record of your actual start and finish times, breaks, and rest periods.
- Check your contract and any staff handbook or collective agreement.
- Talk to your union rep, if you have one.
- Get free advice. In the UK, Acas has a free helpline. In EU countries, your national labor inspectorate or a trade union is usually the place to start.
Night work is legal and common, but it isn't a free-for-all. Knowing where the lines are makes it much easier to push back on a rota that crosses them.