Are Supply Teachers Workers or Employees?

Ask a supply teacher who their employer is and you will usually get a pause before the answer. The school books you through an agency, the agency places you with an umbrella company, and a payslip eventually appears with a name on it that is neither the school's nor the agency's. Nobody explains, at the point you sign up, which of the three basic categories of UK employment status you have actually landed in — and the difference is not academic. It decides whether you can be dismissed without notice, whether you build redundancy rights, and what you can take to an employment tribunal if something goes wrong.

This guide sets out the three-tier framework UK law actually uses, explains why the shape of agency supply teaching pushes most people into the worker category rather than employee or self-employed status, and works through what that does and does not get you — in plain English rather than case-report language, and honest about where the answer is genuinely fact-specific.

The three-tier framework: employee, worker, self-employed

UK employment law has no single test for “are you protected or not”. It has three statuses, each carrying a different bundle of rights, defined in section 230 of the Employment Rights Act 1996 and echoed with near-identical wording in the National Minimum Wage Act 1998 and the Working Time Regulations 1998.

What matters more than the labels: nobody gets to choose their own status by contract. A contract cannot simply declare someone self-employed and make it so if the underlying reality — control, personal service and mutuality of obligation — points the other way, a point covered in detail below.

Where agency supply teachers actually sit — and why

Put the framework next to how agency supply teaching is structured and two questions fall out: are you the school's employee, and are you the agency or umbrella company's employee? Usually no to both. The school is not a party to your contract at all in the standard arrangement, and a tribunal will only bridge that gap where genuinely necessary — simply returning to the same school repeatedly is not enough on its own. That is separate from the AWR 12-week rule, which gives equal pay and conditions after 12 weeks without making the school your employer. And whether you are employed by the umbrella or agency itself turns on mutuality of obligation between bookings: most arrangements are deliberately structured so neither side owes the other anything between assignments, which leaves worker status — exactly as section 230(3)(b) describes — rather than employment.

The tests a tribunal actually applies

Employment status disputes are decided case by case, applying a small number of established tests rather than a checklist. Four ideas do almost all of the work, none of the leading cases is about teaching, and all are routinely applied to it.

What worker status actually gives you

Being a worker rather than an employee is not the same as having no rights. A good deal of the anxiety around this subject rests on the wrong assumption that worker status means no protection at all.

• The National Minimum Wage or National Living Wage — the 1998 Act uses its own worker definition, near-identical to section 230(3), regardless of employee status.
• Paid annual leave under the Working Time Regulations 1998 — 5.6 weeks a year, pro-rated. How it is paid (rolled-up or accrued) depends on your booking pattern — see our rolled-up holiday pay guide.
• Rest breaks and working time limits — daily and weekly rest, and the 48-hour average week limit unless you have opted out.
• Protection from unlawful deductions from wages under Part II of the Employment Rights Act 1996, which uses the wider worker definition.
• Protection from discrimination under the Equality Act 2010.
• Whistleblowing protection, with its own extended definition covering agency workers.
• Automatic enrolment into a workplace pension — ordinarily standard defined-contribution, not the Teachers' Pension Scheme, for agency-paid work.

None of this is a consolation prize: underpayment, denied holiday pay and unlawful deductions are all tribunal claims in their own right, and the Agency Workers Regulations layer equal basic pay and conditions after 12 weeks in the same role on top.

What worker status does not give you

The gap between worker and employee status is concentrated in exactly the protections that matter most when a working relationship ends, or when you want more control over your own hours.

One exception worth naming: statutory sick pay and family-related pay depend on being an “employed earner” for National Insurance — a tax concept, not the section 230 test here. A worker can usually still claim statutory sick pay through the umbrella company that processes their PAYE.

Umbrella companies and your status

Umbrella companies sit at the centre of almost every agency supply teacher's status question, because they are usually the entity the contract of engagement names. The umbrella almost always processes your pay as though you were its employee, deducting tax and National Insurance under PAYE — reinforced by the off-payroll (IR35) rules that have applied to schools since April 2017. But whether the contract also satisfies the mutuality test for employment-law purposes is separate, and for most umbrella arrangements it does not, leaving worker status as the accurate description even though the payslip looks like an employee's. See is your umbrella company withholding holiday pay and reading your umbrella company KID line by line for the deductions and paperwork themselves, which this page does not repeat.

Local authority pools are often different

Everything above describes the standard agency-and-umbrella chain. Where a local authority, maintained school or trust engages you directly through its own supply pool, with no agency or umbrella company in the chain, the analysis changes: you now have a direct relationship with a single identifiable employer. That does not automatically make you an employee, but it removes the deliberately unbound gap between assignments that pushes agency supply into worker status, and continuing engagement with one employer is more likely to satisfy mutuality over time. Coverage varies enormously by area, with no national directory of which authorities still run a pool, and it typically also carries Teachers' Pension Scheme eligibility where available. The full comparison is at local authority supply pools versus agencies.

How to check your own status

You do not have to guess, and you should not rely on a verbal description of your status. Three sources of evidence matter, in order of weight.

If you think you have been wrongly classified

A misclassification claim is rarely brought as a freestanding question. It is almost always attached to a specific right you say you were refused — unpaid holiday, an unlawful deduction, National Minimum Wage arrears, or a dismissal you say should have been treated as one — and employment status is then decided by the tribunal as part of that substantive claim.

• Set out your case in writing to the agency or umbrella company first, naming the specific right you say you have been denied.
• If your union covers you — NEU and NASUWT both advise on status disputes — contact them before a solicitor. It is free, and they will have seen how the same agency handles similar cases.
• Acas early conciliation is a compulsory, free first step before any tribunal claim. Notifying Acas stops your time limit running while it takes place.
• Watch the time limit. As at 30 September 2026 it is three months less one day from the event complained of; from 1 October 2026, under the Employment Rights Act 2025, most tribunal time limits rise to six months less one day.
• Keep every piece of paper: booking confirmations, payslips, your Key Information Document, and any written answer about your status.

Putting it together

Most agency supply teachers are workers, not employees, of whichever agency or umbrella company pays them, and almost never employees of the school where they teach — a conclusion built on mutuality of obligation and control, not on whatever label a contract uses. Worker status is a real floor: the minimum wage, paid holiday, rest breaks and protection from unlawful deductions and discrimination all apply. It does not bring unfair dismissal protection, redundancy pay, the right to request flexible working, or statutory notice, all reserved for employees. Local authority and direct school engagement can change the answer where available. Wherever you sit, read your Key Information Document and contract for what they actually say, not the label on the front page, and get union or legal advice on your own facts before relying on anything here.