Zero-Hours Contracts: What Do They Actually Mean?

Zero-hours contracts tend to have a negative reputation, especially among students and people working in hospitality, retail or other jobs where shifts can change from week to week.

A zero-hours contract is an arrangement where the employer does not guarantee a minimum number of working hours. This means someone might receive several shifts one week and very few, or none, the next. The arrangement is designed to give the business flexibility when the amount of work available changes. Depending on the contract, the person may also have the flexibility to accept or reject shifts. However, the way this works in practice can vary between workplaces.

Is someone on a zero-hours contract an employee?

Not necessarily. Someone on a zero-hours contract could be legally classed as a worker or an employee. Their status depends on the reality of the relationship, including whether the employer is expected to offer work, whether the individual must accept it and what happens between assignments. This difference matters because employees normally have some rights that workers do not, including certain dismissal and redundancy rights when the relevant conditions are met.

Do zero-hours staff have employment rights?

Yes.

Being on a zero-hours contract does not mean someone has no workplace rights.

Where the person is legally classed as an employee or worker, their rights can include the National Minimum Wage, paid holiday, rest breaks, payslips and protection from unlawful discrimination.

The exact range of rights will depend partly on whether they are an employee or a worker. Holiday entitlement can be particularly confusing because someone may not work the same number of hours each week. However, irregular working hours do not remove the right to statutory paid holiday. The amount and method of payment may need to be calculated according to the rules applying to irregular-hours or part-year workers. The same basic principle applies to minimum wage. An employer cannot avoid paying it simply because the person has no guaranteed hours.

Can you reject a shift?

This depends on what has genuinely been agreed. Many zero-hours arrangements allow the individual to accept or reject work as it is offered. However, people should check their contract rather than automatically assuming that this applies in exactly the same way to them. There can also be a difference between what the contract technically allows and how the workplace behaves. Someone might officially be allowed to reject shifts but find that their hours are suddenly reduced whenever they do. Situations involving punishment or unfair treatment for asserting a legal right may need to be considered more carefully. A genuinely flexible arrangement should not rely on making someone feel that they must always be available despite receiving no guarantee of work.

Can the employer suddenly stop offering hours?

A zero-hours arrangement means that there may be no guaranteed minimum number of shifts. As a result, the employer may sometimes offer fewer hours or none at all. However, this does not mean that every decision to remove someone's hours is automatically lawful. The reason can matter. Reducing someone's hours because of unlawful discrimination, because they raised certain protected concerns or because they asserted a statutory right could create a separate legal issue.

The person's employment status and the structure of their contract also matter. Some zero-hours contracts operate as one continuing agreement, while others may be treated as a series of shorter contracts each time work is accepted. This can affect continuity of employment and rights connected to it. This is one of the more complicated areas and probably not something that can be decided only by reading the phrase "zero-hours."

Can you work somewhere else?

Zero-hours workers are generally not supposed to be prevented from working for another employer simply because their main contract does not guarantee them any work. Terms that attempt to prohibit someone on a zero-hours contract from working elsewhere are generally unenforceable. There are also protections covering certain low-income workers whose contracts contain similar exclusivity restrictions.

Practically, this makes sense. It would be difficult for someone to support themselves if one employer offered no guaranteed income while also preventing them from accepting work elsewhere. There could still be reasonable restrictions concerning matters such as confidentiality or genuine conflicts of interest. That is different from a general rule saying that the person cannot have another job at all.

What about notice?

This is another area where employment status and the wording of the contract become important.

If someone is legally an employee and has been employed for at least one month, statutory notice rules may apply. A contract can also create a right to notice. Workers do not always have the same statutory notice rights as employees, although their contract may still require either side to give notice. When a zero-hours arrangement ends, the employer should still pay outstanding wages and any holiday that has been built up but not taken, unless the person has lawfully received rolled-up holiday pay. Notice pay may also be due depending on the person's status and contract.

This is why telling someone that they can "just leave" because they are on zero hours can be misleading. They should still check what type of contract they have and what it says about ending the arrangement.

When are zero-hours contracts useful?

Zero-hours contracts are not automatically bad. They can suit people who genuinely want flexibility, such as students who need to fit work around classes or people who only want occasional shifts. They can also help businesses deal with seasonal demand, events, staff absence or periods when the amount of available work changes.

The problem is when all the flexibility benefits the business while all the uncertainty falls on the individual.

Someone may technically be free to reject work, but that freedom is less meaningful if refusing one shift means they are not offered another for weeks. Similarly, being available at short notice can affect someone's ability to study, arrange childcare or accept another job. Acas advises that zero-hours contracts may be inappropriate when someone is needed for regular hours over a continuous period, when the arrangement is used to avoid giving employment rights, or when the role is required to run the core business rather than deal with temporary changes in demand. The main point I have taken from researching this is that zero-hours contracts should involve genuine flexibility rather than disguised insecurity. They can work well in the right circumstances, but the person accepting the contract should understand that their income may change significantly from week to week. They should also know that having no guaranteed hours does not mean having no rights.

A quick note: this post is for general information and education rather than legal advice. Employment rights can depend on someone's status, contract, location and individual circumstances, so current official guidance or professional support should be used for specific situations.

Last checked: August 2026. This series focuses on England, Scotland and Wales.