Part-time and fixed-term workers: what equal treatment actually means

Part-time and fixed-term status doesn’t lower the bar for how your employer can treat you. They still can’t treat you worse than a comparable full-time or permanent colleague, just because of that status. That protection has a specific legal test, and it has limits too. This page sets out who counts as a part-time workerA legal category that sits between employee and self-employed. Workers are entitled to certain rights including national minimum wage, paid holiday, and protection from unlawful deduction from wages, ... or fixed-term employee, what equal treatment actually requires, and the real rule on how long a fixed-term contract can run before it becomes permanent. If you think you’re being treated less favourably right now, the last section here covers exactly what to do next.

Are you covered?

The law calls you a part-time worker simply because you work fewer hours than a comparable full-time worker in the same or a similar role, for the same employer. There’s no minimum number of hours that triggers protection, and it applies whether you work two days a week or four.

A fixed-term employee is someone whose contract is built to end on its own, whether that’s a set date, a finished task, or a defined event such as covering a colleague’s absence. It’s distinct from both a permanent contract and casual or zero-hours arrangements, which zero-hours contracts covers separately.

The right to equal treatment

Two separate sets of regulations cover this, and they work the same way. Working part-time doesn’t give your employer a free pass on pay or conditions. The Part-time Workers Regulations 2000 stop them treating you worse than a comparable full-time colleague doing broadly similar work for the same employer, purely because of your hours. The Fixed-term Employees Regulations 2002 say the same thing for fixed-term employees against a comparable permanent employee.

In both cases, “equal treatment” means pro rata where that makes sense. Employers should calculate pay, holiday entitlement, and access to benefits in proportion to your hours or contract length, not withhold them outright. It doesn’t mean identical treatment in every respect, since some things (a full relocation package tied to a permanent role, for example) may not sensibly convert to a part-time or fixed-term equivalent. What it does mean is your employer needs an objective, non-status-based justification for any real difference in treatment.

This is the same underlying legal model used in agency worker rights, just triggered by a different status rather than a 12-week qualifying periodThe length of continuous employment you need before you can bring certain claims, most importantly unfair dismissal. The qualifying period for unfair dismissal is currently two years, though some righ....

Common examples of less favourable treatment

A bonus scheme, training opportunities, or a promotion round that full-time or permanent colleagues can access, but you can’t. A lower hourly rate for doing the same job. RedundancyA dismissal that occurs when your employer no longer needs the work you do, either because the business is closing, a workplace is closing, or the requirement for employees to carry out that kind of w... consultationA process your employer is required to carry out before making significant decisions that affect you, most commonly redundancy. It must be genuine, meaning your employer must listen and consider what ... you’re left out of, or redundancy selection that falls on part-time or fixed-term staff more than genuine business need explains. Holiday or sick pay that doesn’t properly reflect a pro-rata entitlement. Staff events, appraisals, or internal job postings you never get invited to.

None of this means every difference is unlawful. A part-time worker genuinely accruing less holiday in absolute terms, because it’s calculated pro rata, isn’t less favourable treatment. What matters is whether the difference reflects your hours or contract length proportionately. If it doesn’t, it’s a penalty for your status itself.

Fixed-term contracts: the four-year rule

A common misconception is that fixed-term status ends automatically after two years. It doesn’t. What matters is whether continuous employment on successive fixed-term contracts has run for four years or more. When it has, the employee becomes permanent by law under the Fixed-term Employees Regulations 2002, unless the employer can objectively justify continuing the fixed-term arrangement, for example because the role is genuinely tied to a fixed external funding period or a specific project end date.

If you’ve been on rolling fixed-term contracts for four years or more and your employer hasn’t confirmed you as permanent, ask them in writing for a statement confirming your status. Disagree with their answer, and you can challenge it at tribunal.

What about young workers?

Workers under 18 sit under a different, age-based protection that applies regardless of whether they’re part-time, fixed-term, or permanent. It’s here for completeness. The legal framework is different from the rest of this page.

The law caps a young worker’s hours at 8 a day or 40 a week, and a shift over 4.5 hours entitles them to a 30-minute uninterrupted break. Night work is restricted too, normally between 10pm and 6am, or 11pm to 7am if the contract specifically allows work after 10pm. Whatever the contract says, no one under 18 can work between midnight and 4am. National Minimum WageThe legal minimum hourly rate for workers under 21. From 1 April 2026, it's £10.85 for 18 to 20-year-olds, and £8.00 for under-18s and apprentices. Tips, in any form, do not count towards it. These ... also applies in age bands, with a separate, lower rate for under-18s than the rates that apply from age 18 upward.

How to challenge less favourable treatment

Start by asking your employer, ideally in writing, for the reason behind the difference in treatment. Under both sets of regulations, you’re entitled to a written explanation, and their response (or refusal to give one) can itself be used as evidence later.

If that doesn’t resolve things, raising a grievance at work covers the formal route. Claims under either set of regulations require contacting AcasThe Advisory, Conciliation and Arbitration Service. A public body that provides free, impartial guidance on workplace rights and disputes, and runs the mandatory early conciliation process before any ... for Early ConciliationA free process run by ACAS that you must go through before you can submit a claim to an employment tribunal. ACAS contacts your employer to see if a settlement can be reached, and the process pauses y... before a tribunal claim. The time limitThe deadline by which you must submit a claim to an employment tribunal. For most claims the limit is three months less one day from the act you are complaining about, and it is strictly enforced. Mis... is three monthsThe standard time limit for bringing most employment tribunal claims, running from the date of the act complained of. Because the limit is three months less one day, you should not wait until what fee... less one day from the treatment you’re complaining about, and it does not pause while you decide what to do.

Where this fits with pay and hours more broadly

This page covers status-based equal treatment specifically. For the underlying entitlements themselves, holiday accrual mechanics sets out how paid holiday builds up. checking your pay against the minimum wage walks through pay checks. what your employer has to give you in writing explains what your contract or written statement should confirm regardless of your status.