If you're training for a career in payroll, you'll run into the words "IR35" and "umbrella company" fairly quickly. Both sound more complicated than they...
If you’re training for a career in payroll, you’ll run into the words “IR35” and “umbrella company” fairly quickly. Both sound more complicated than they are.
Both matter more than ever from 6 April 2026, when new rules changed who is legally on the hook if PAYE tax goes unpaid.
This guide explains what IR35 actually means, how umbrella companies work, and what the 2026 changes mean for anyone handling payroll for contractors. No jargon, just the practical detail you need.
If you haven’t covered the basics of UK payroll yet, our beginner’s guide to how UK payroll works is a good place to start before this one.
What Is IR35, in Plain Terms?
IR35 is the common name for the UK’s off-payroll working rules. It exists to stop someone doing a job that is, in substance, employment, while being paid through their own limited company to avoid employee-level tax and National Insurance.
The rules don’t ban contracting through a limited company. They simply require that the working relationship be assessed honestly.
Where that relationship looks like employment, the worker pays broadly the same tax as an employee would, as set out in HMRC’s own guidance on off-payroll working.
How Employment Status for Tax Is Decided
Status is assessed contract by contract, not person by person. The same contractor could be inside IR35 on one engagement and outside it on another, depending on how that specific contract actually works in practice.
For medium and large private sector clients, the client decides status, not the contractor. HMRC’s Check Employment Status for Tax (CEST) tool is often used to help make that call.
The client must issue a status determination statement explaining its reasoning. Small clients are the exception, since responsibility there stays with the worker’s own intermediary.
If You Disagree with a Status Determination
A worker or fee-payer who disagrees with a status determination can raise it formally with the client through the client-led status disagreement process, before HMRC gets involved.
The client must respond within 45 days, either standing by its original decision with reasons or issuing a new determination.
What Happens If a Contract Is Inside IR35
If a contract is inside IR35, the fee-payer (usually the agency or client paying the contractor’s company) must treat the fee like a salary for tax purposes.
- Income Tax and employee National Insurance are deducted from the fee before it reaches the worker’s company.
- The fee-payer separately pays employer National Insurance and, where it applies, the Apprenticeship Levy to HMRC.
- Student or postgraduate loan repayments are not deducted at this stage. The worker reports and pays these themselves through Self Assessment, unlike the standard payroll deduction process that applies to employees.
IR35 doesn’t stop anyone contracting through a limited company. It just means that when the work genuinely looks like employment, the tax has to look like employment tax too.
What Is an Umbrella Company?
An umbrella company is a UK limited company that takes on the role of employer for a contractor’s payroll. The contractor works through it on a PAYE basis instead of running their own limited company.
Many agencies use umbrella companies specifically because the engagement is inside IR35, or because the agency has no payroll facility of its own for temporary or contract staff.
How the Money Flows
The chain usually runs: end client pays the agency, the agency pays the umbrella company, and the umbrella company runs PAYE on the worker’s pay and pays the worker net.
The rate the agency pays the umbrella is higher than the worker’s take-home pay target, because it already has to cover the umbrella’s margin and the employer-side costs below.
What Comes Out of Your Pay
From the gross pay the umbrella receives, several things come off before the worker sees any money. Understanding this breakdown is one of the most common things payroll trainees are asked to explain.
- The umbrella’s margin or admin fee, typically somewhere between £10 and £25 or more a week, taken off before tax is calculated.
- Income Tax, deducted through PAYE using the worker’s tax code, exactly as covered in our guide to PAYE and National Insurance.
- Employee National Insurance, deducted the same way it would be for any employee.
- Student loan repayments and pension contributions, where they apply.
Employer National Insurance and the Apprenticeship Levy are not deducted from the worker’s payslip. They’re built into the higher umbrella rate the agency is billed, so the worker doesn’t pay them twice.
Holiday pay must be shown on every payslip. It isn’t extra money from the umbrella. It’s a reallocation of the worker’s own earnings, so the worker is no better or worse off either way.
How It Compares to Agency PAYE or a Limited Company
The table below sets out the three main ways a contractor in the UK is typically paid, and how each one handles tax, National Insurance and admin.
| Route | Who is “employer” for tax | Admin for the worker | Typical fit |
|---|---|---|---|
| Agency PAYE | The recruitment agency | Lowest. The agency runs payroll directly. | Short-term or lower-rate roles where the agency has its own payroll. |
| Umbrella company | The umbrella company | Low. One umbrella margin, one payslip per assignment. | Inside-IR35 contracts, or agencies without their own payroll. |
| Own limited company | The worker’s own company | Highest. Company accounts, VAT (if registered), Corporation Tax. | Genuinely self-employed-style contracts, usually outside IR35. |
An umbrella company doesn’t change how much tax a contractor pays. It changes who runs the payroll and takes on the compliance risk of getting it right.
The New Rules From 6 April 2026
From 6 April 2026, following the Autumn Budget 2025, end clients carry direct responsibility for making sure PAYE and National Insurance are correctly operated on pay that reaches a worker through an umbrella company.
This wasn’t a sudden change. HMRC consulted on umbrella company regulation back in 2023, published draft legislation in 2025, and confirmed the final rules at the Autumn Budget 2025 before they took effect.
Joint and Several Liability, Explained
Where an umbrella company fails to account for PAYE or National Insurance properly, the client and the umbrella can both be pursued by HMRC for the full amount owed, not just a share of it.
Whichever party HMRC collects from can then seek a contribution back from the other. Where an agency sits between the client and the umbrella, the agency is generally the party jointly liable rather than the end client.
The rules also cover employers of record, since the legislation treats them as falling within the definition of an umbrella company for this purpose.
Anti-avoidance provisions apply where a worker isn’t formally employed by the umbrella but the relationship is, in substance, employment.
What Agencies and End Clients Must Now Do
Businesses using contractors through umbrella companies now need to take compliance seriously rather than treating it as the umbrella’s problem alone.
- Map the full supply chain to identify exactly where liability could land if something goes wrong.
- Check that every intermediary, including any employer of record, is properly registered with HMRC and meeting its PAYE and NIC obligations.
- Carry out proper due diligence before using a new umbrella company, not just after a problem appears.
- Review and strengthen contractual protections with agencies and umbrella providers.
- Keep monitoring arrangements on an ongoing basis, including periodic checks of payroll records and HMRC remittances.
These rules sit alongside the existing IR35 off-payroll working rules, not instead of them. A contract can be fully compliant with IR35 and still expose a client to risk if the umbrella itself isn’t paying HMRC correctly.
Why This Matters If You’re Training for a Career in Payroll
Payroll administrators increasingly need to understand contractor pay, not just standard employee pay. Umbrella company payslips, IR35 status and joint liability are now realistic topics in a payroll role, not niche specialisms.
A UK payroll administrator typically earns around £27,000 a year, rising to roughly £29,000 in London, with progression towards senior payroll administrator or payroll officer roles over time.
Alongside contractor pay, a well-rounded payroll professional also understands other deduction types, such as attachment of earnings orders, and how roles are changing as AI is used in payroll.
If you’re assessing or querying an umbrella arrangement as part of a payroll or finance role, a sensible working order looks like this:
- Confirm whether the contract has been assessed as inside or outside IR35, and ask to see the status determination statement if it’s inside.
- Check the umbrella company is registered with HMRC for PAYE and is actually operating it, not just claiming to.
- Ask for a clear breakdown of the umbrella’s margin, so it’s separated from tax, National Insurance and pension deductions on the payslip.
- Confirm how holiday pay is being handled and shown, since this must appear on every payslip.
- Flag anything that looks like a disguised remuneration scheme rather than straightforward PAYE, since these carry real risk for everyone in the chain.
Understanding umbrella company payroll and the 2026 liability rules is now a genuinely useful, practical skill for anyone starting out in UK payroll, not just a compliance footnote.
Common Mistakes and Misconceptions About Umbrella Companies
A few misunderstandings come up again and again, both from workers and from people new to payroll. Clearing these up early avoids real problems later.
The first is assuming an umbrella company can offer noticeably higher take-home pay than straightforward PAYE for the same rate. Genuine UK PAYE umbrellas should produce broadly similar take-home pay, aside from the margin.
If a provider promises take-home pay well above what standard PAYE deductions would allow, that’s a warning sign rather than a selling point. It usually means tax and National Insurance aren’t being correctly accounted for somewhere in the chain.
The second is treating holiday pay shown on an umbrella payslip as a bonus. It is the worker’s own money, reallocated and shown separately, not extra pay from the umbrella.
The third, especially relevant after April 2026, is assuming liability for a non-compliant umbrella stops with the umbrella itself. Agencies and end clients can now be pursued directly.
Disguised Remuneration: Why It’s a Red Flag
Some non-compliant schemes try to route part of a worker’s pay as something other than salary, such as a loan or a grant, specifically to avoid Income Tax and National Insurance. HMRC treats this as disguised remuneration.
These schemes carry real risk for the worker, the umbrella and anyone else in the contractual chain. HMRC has pursued both workers and businesses over disguised remuneration arrangements that ran for years before being challenged.
A payroll professional checking an unfamiliar umbrella arrangement should treat any pay structure split into multiple unusual payment types as something to investigate, not accept at face value.
None of this is as complicated as it first sounds once you’ve seen the money flow through from end client, to agency, to umbrella, to worker.
It’s the kind of practical, real-world detail that separates someone who’s memorised payroll theory from someone who can actually run it.
If this is the sort of thing you want to get properly comfortable with, PC Training’s Advanced Payroll Training course covers contractor pay and compliance, alongside guaranteed recruitment support once you’re ready to apply it.
Frequently Asked Questions
Is being paid through an umbrella company the same as being self-employed?
No. An umbrella company employs you for tax purposes and runs PAYE on your pay, deducting Income Tax and National Insurance the same way a normal employer would. You are not self-employed in this arrangement.
Who decides if a contract is inside or outside IR35?
For medium and large private sector clients, the end client decides and must issue a status determination statement. For small clients, the worker’s own intermediary makes the decision instead.
What changed for umbrella companies on 6 April 2026?
End clients became directly responsible for ensuring PAYE and National Insurance are correctly operated on umbrella company pay, with the client and umbrella jointly and severally liable if something goes wrong.
Does an umbrella company’s margin get taxed?
No. The umbrella’s margin, or admin fee, is taken off the gross pay before Income Tax and National Insurance are calculated on the remaining amount.
Can a payroll career involve working with umbrella companies and IR35?
Yes. Many payroll and finance roles now involve checking contractor pay arrangements, understanding status determinations, and reading umbrella company payslips correctly, particularly since the 2026 liability changes.
What should I check before trusting an umbrella company’s payslip?
Check the margin is shown separately from tax and National Insurance, that holiday pay is itemised rather than hidden, and that the deductions match a standard PAYE calculation for the worker’s tax code.
