Working at night
Working at night can pose particular problems for workers. It is important to know the extra legal protection for night workers, what the exceptions are and what you can do if you're unhappy with your rights as a night worker.
Restrictions on night work
There are limits on how long you can work at night. Under the Working Time Regulations, night time is described as the period between 11.00 pm and 6.00 am. You're a night worker if you regularly work for at least three hours during this period. The regulations also give you rights to paid holiday, rest breaks and limits on your working week.
- Holiday entitlements - find out more
- Rest breaks - find out more
- Working time limits - find out more
- Advice for employers on working hours, rest breaks and the working week (NI Businessinfo)
There are separate special rules for mobile workers in air, sea and road transport.
- Working time rules for workers in Air Transport - find out more (Department for Transport website)
- Working time rules for workers in road transport in Northern Ireland - find out more (PDF 551 KB)
- More on working time rules for workers in Sea Transport (PDF 208 KB)
- Help with PDF files
As a night worker, you shouldn't work more than an average of eight hours in each 24-hour period (excluding overtime). This average is calculated over a 17-week period. You can't opt out of the night working limit. If your night work involves special hazards or heavy physical or mental strain, you can't be made to work more than eight hours in any 24-hour period. This includes overtime.
Young workers
If you're under 18 years-old, but over school leaving age (you're under school leaving age until the end of summer term of the school year in which you turn 16) you're classed as a young worker. Under the law you're not allowed to work at night (normally this is 10.00 pm to 6.00 am but you can agree to change this to 11.00 pm to 7.00 am). There are some exceptions to this, if you work in a hospital or hotel, for example. You can have 30 minutes rest break if you work longer than four and a half hours at a stretch.
- Night working rules for young workers - find out more (nibusinessinfo website)
- More about rest breaks
Exceptions
Limits on night work don't apply if:
- you have to travel a long distance from your home to get to work or you constantly work in different places
- you're doing security or surveillance-based work
- you're working in an industry with busy peak periods, like agriculture, retail or tourism
- there's an emergency or there might be an accident
- the job needs round-the-clock staffing (for example, hospital work)
- you're employed in the rail industry and you work on board trains or your activities are irregular or linked to seeing that trains run on time.
If you're a night worker in any of these situations, you have the right to take rest breaks to make up for your extra time at work.
Will you receive extra pay if you work at night?
Your employer might decide to reward you for working anti-social hours, for example, you may get free transport, food or extra pay. You only have a legal right to any of these if your contract says you do, but it's good practice for employers to offer them.
Changes to your contract
If you don't have to do night work under your contract, your employer will normally need your agreement to make you change your hours. A contract can be in writing or a verbal agreement.
- Contracts - find out more
- More about changes to employment conditions
- Advice for employers on contracts of employment (nibusinessinfo.co.uk website)
Your health rights as a night worker
Because there are health risks linked with night work, your employer must offer you a free health assessment before you start working at night and on a regular basis after that. If you fill in a questionnaire and your answers cause concern, your employer should refer you to a doctor. If a doctor tells you that you have health problems caused by night work, your employer must transfer you to daytime work - if this is possible.
Night work and pregnancy
If you fall pregnant, or are a new mother and are worried about the risks of night-time work, you should speak to your employer about being moved to daytime work.
- Pregnancy at work - find out more (parents section)
- Advice for employers on pregnancy at work (nibusinessinfo)
What do you need to do next?
If you feel you're exceeding the night work limits:
- your employer may be in breach of contract
- the Health and Safety Executive for Northern Ireland could take action against your employer
If you think you're not receiving any other rights as a night worker you can:
- talk to your manager to try to sort matters quickly, be aware that your employer must keep records of the hours you've worked
- contact your trade union or health and safety representative (if you have one) for advice
- approach matters informally, or follow the contractual grievance procedure
- Resolving problems at work - find out more
- Read more about breach of contract
- More about health and safety
Where can you get help?
The Labour Relations Agency (LRA) offers free, confidential and impartial advice on all employment rights issues.
Your local Citizens Advice Bureau (CAB) can provide free and impartial advice. You can find your local CAB office in the phone book or online.
You can get more information on Health and Safety issues from the Health and Safety Executive for Northern Ireland (HSENI). You can also call the HSENI freephone helpline on 0800 0320121.
If you are a member of a trade union, you can get help, advice and support from them.

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