Understanding Your Supply Teacher Payslip: PAYE vs Umbrella Company Explained

If you started supply teaching this September, your first few pay packets have probably landed by now. And if the numbers don't quite match what you expected, you're not alone. Understanding your supply teacher payslip is one of the most common sources of confusion for educators working through an agency, particularly once umbrella company margins, National Insurance and pension deductions all appear on the same slip. This guide breaks down what should be on your payslip, the real difference between PAYE and umbrella company arrangements, and the rights that build up the longer you work in the same role.

Why Your Supply Teacher Payslip Can Look Confusing This Term

By late September, most supply teachers have settled into a rhythm of bookings and received two or three payslips. That's usually when questions start: why does the take-home pay look lower than the daily rate advertised for the role? Why is there a deduction labelled "margin" or "assignment rate"? What exactly is a "KID"?

Part of the confusion comes from how supply pay actually works. The rate a school pays for your booking usually covers more than your wages. It also has to account for the agency's costs and, in some arrangements, an umbrella company's fee. None of this should be hidden from you. Since April 2020, employment businesses have had to provide a Key Information Document (KID) before you start work, setting out how you'll be paid, who pays you, and what deductions to expect. If you were never given one, it's worth asking your agency for it. You're entitled to see it.

PAYE vs Umbrella Company: What's Actually Different

There are generally two ways supply teachers are paid through an agency: directly on PAYE, or through an umbrella company.

On agency PAYE, the agency itself is your employer for tax purposes. It deducts Income Tax and your National Insurance contributions and pays the rest to you directly. Much like being paid by a school.

With an umbrella company, a separate company sits between you and the agency and becomes your legal employer instead. The agency pays the umbrella company an assignment rate that already includes employer's National Insurance and the umbrella's own fee. Once those are taken out, along with your Income Tax, employee National Insurance and pension contribution, what's left is your net pay. Some umbrella arrangements also hold back an amount for holiday pay, which is meant to be paid out later. So it's worth checking how and when you'll actually receive it.

You are not automatically required to use an umbrella company. Many supply teachers can ask to be paid on agency PAYE instead, and agencies will often agree rather than lose a reliable teacher to another agency.

What Should Be on Your Payslip

Whichever way you're paid, your supply teacher payslip should clearly show your gross pay, every deduction, and your net pay. With nothing bundled together or left unexplained. If you're with an umbrella company, look out for the assignment rate the agency paid, the umbrella's margin, employer's and employee's National Insurance, pension contributions, and any holiday pay that's been withheld.

If a payslip shows only part of your earnings going through payroll, or your pay is split into confusing categories like a small "basic" amount plus a large "bonus," it's worth asking questions. These structures are sometimes used to make take-home pay look higher than it really is once deductions are accounted for properly.

Your Rights: The 12-Week Rule and Claiming Mileage

Two protections are especially relevant once you've been working for a few weeks. The first is the Agency Workers Regulations 12-week rule: after 12 continuous weeks in the same role with the same school (or "hirer"), you become entitled to the same basic pay and working conditions you'd have received if the school had employed you directly. The clock generally keeps running if you move between schools within the same local authority or multi-academy trust, but it usually resets if you switch to a genuinely different employer.

The second is mileage. If you don't have a single fixed school and travel between different placements, you may be able to claim Mileage Allowance Relief on your work journeys, provided you keep a log of dates, mileage and postcodes. If you're engaged through an umbrella company or agency under the school's direction and supervision. Which is true for most classroom supply work. You generally cannot claim tax relief on ordinary home-to-work travel to a single regular placement.

What to Do If Something Doesn't Add Up

If your payslip doesn't make sense, the first step is simple: ask. A compliant umbrella company or agency should be able to explain every deduction in plain terms, and should never ask you to sign anything that waives your rights. It's also worth checking whether the umbrella company belongs to a recognised trade body with a compliance code, and keeping every payslip and your KID somewhere safe in case you need to query something later in the year.

None of this means umbrella company arrangements are automatically a problem. Many are run properly and clearly. But knowing what should be on your supply teacher payslip, and what rights apply after 12 weeks, means you can ask the right questions with confidence rather than guessing.