Joint and several liability is one of the most important changes to hit the UK umbrella company market in years.
For a long time, umbrella company compliance was often treated as something that sat mainly with the umbrella provider. The umbrella company employed the worker, operated PAYE, deducted tax and National Insurance, and paid the worker. Agencies and end clients often relied on umbrella preferred supplier lists, accreditation checks, commercial agreements and general due diligence.
That approach is no longer enough.
From 6 April 2026, new PAYE rules apply to labour supply chains that include umbrella companies. Where an umbrella company fails to operate PAYE correctly, HMRC can recover unpaid amounts from another party in the supply chain. In many cases, that will be the recruitment agency that has the contract with the end client. Where there is no agency, the end client may carry the liability.
This is a major shift.
The practical effect is deliberately tough. This is not the same as the off-payroll working rules, where reasonable care in making a status determination is a central concept. Under the umbrella PAYE rules, if the umbrella company does not pay the correct PAYE amount to HMRC, the relevant agency or end client may be pursued for the underpayment.
It means umbrella company risk is no longer contained inside the umbrella company. It travels up the supply chain.
Joint and several liability means more than one party can be held responsible for the same tax debt.
In the umbrella company context, it means the umbrella company remains responsible for operating PAYE correctly, but another party in the labour supply chain can also become liable if the umbrella company fails to account for the correct PAYE tax and National Insurance.
In simple terms, HMRC does not have to rely only on the umbrella company to recover the unpaid amount. It can also pursue the relevant agency or, in some cases, the end client.
That is why this change matters so much. The financial risk of umbrella non-compliance can now sit with businesses that previously saw themselves as one step removed from payroll.
The government has been concerned for years about non-compliance in the umbrella company market.
Some umbrella companies operate properly, transparently and professionally. Many contractors are paid correctly through PAYE and receive clear payslips, holiday pay information and employment rights.
However, the market has also seen serious problems, including disguised remuneration schemes, mini umbrella company fraud, unclear deductions, poor payslip transparency and arrangements that promise unusually high take-home pay.
These arrangements can damage everyone involved.
Workers can be left with unexpected tax bills. Compliant umbrella companies are undercut by providers using aggressive or unlawful models. Recruitment agencies and end clients can suffer reputational damage. HMRC loses tax that should have been paid.
Joint and several liability is designed to change the incentives in the market. Instead of allowing agencies and end clients to rely only on the umbrella company’s assurances, the rules push supply chain parties to carry out stronger checks before allowing an umbrella company into the chain.
The new rules affect labour supply chains where a worker is employed by an umbrella company.
The key parties are:
Where there is an agency in the chain, the liability will usually sit with the agency that has the contract with the end client to supply the worker.
Where there is no agency, the end client can be the relevant party.
Where the chain includes overseas agencies, connected companies or more complex arrangements, the liability position may be different and needs careful review.
This is especially important where parties in the chain are connected or based overseas. The rules are designed to stop liability being avoided simply by moving risk into a connected entity, offshore agency or more complex contractual arrangement.
The important point is that the agency or end client cannot simply assume that the umbrella company carries all the risk.
For contractors, the rules should help improve market standards, but they do not remove the need for basic checks.
A compliant umbrella company should be able to explain clearly:
Contractors should be cautious if an umbrella company promises take-home pay that appears much higher than standard PAYE calculations. High take-home pay is often the warning sign that something may be wrong.
The new rules are mainly aimed at tax compliance in the supply chain. They do not mean contractors can ignore their own payslips, tax position or payment arrangements. A contractor should still check whether PAYE is being applied properly and whether the payslip makes sense.
If a payslip is unclear, the contractor should ask questions immediately and keep written records.
This is one of the biggest practical questions.
In theory, contractors may still have a choice of umbrella company. In practice, joint and several liability is likely to make agencies and end clients much more selective.
Agencies are now financially exposed if an umbrella company in their supply chain fails to operate PAYE correctly. As a result, many agencies may restrict contractors to a smaller preferred supplier list of umbrella companies that have passed their due diligence checks.
This may feel like reduced freedom for contractors, but from the agency’s point of view, the risk has changed. An agency that allows contractors to use any umbrella company without proper checks may be taking on a tax risk it cannot control.
The best outcome is not a closed market where contractors have no meaningful choice. The best outcome is a controlled, transparent and well-governed umbrella selection process where contractors can choose from properly checked, compliant providers.
This is also relevant to inside IR35 engagements. Umbrella employment has often been seen as the straightforward PAYE route for contractors working inside IR35, but the 2026 rules mean umbrella arrangements are no longer a low-risk workaround for agencies and end clients unless the provider is properly checked, monitored and able to evidence compliance.
For recruitment agencies, joint and several liability is a governance issue, not just a payroll issue.
Agencies need to know which umbrella companies are in their supply chain, how workers are being paid, what checks have been completed, and whether those checks are refreshed regularly.
A basic preferred supplier list is no longer enough. Agencies should be able to explain why each umbrella company is approved, what evidence was reviewed, and what monitoring takes place after approval.
Good agency due diligence should include:
Agencies should also consider whether their contracts give them the right to request payroll evidence, payslip samples, PAYE payment evidence and confirmation that workers are being paid correctly.
The point is not to create paperwork for the sake of it. The point is to build a defensible audit trail.
End clients should not ignore this change.
Where an agency is involved, the agency may usually be the relevant party. However, end clients still have a commercial and reputational interest in the quality of their supply chain.
In some cases, the end client may carry direct liability, especially where it contracts directly with the umbrella company or where there are overseas or connected-party arrangements.
End clients should ask their recruitment suppliers how they manage umbrella compliance. They should also understand whether contractors working in their business are being paid through compliant providers.
This is particularly important for larger organisations, public sector bodies and businesses with high volumes of temporary labour.
End clients should be asking:
A strong agency partner should be able to answer these questions confidently.
For compliant umbrella companies, the change should be an opportunity.
The market is moving towards evidence-led compliance. Umbrella companies that can prove strong payroll controls, transparent payslips, proper holiday pay treatment and clear worker communication will be better placed than providers that rely on vague assurances.
Umbrella companies should expect more questions from agencies and end clients. They may be asked to provide evidence of PAYE processes, sample payslips, audit reports, insurance, onboarding documents, complaints handling procedures and worker communication templates.
A strong umbrella company should be able to show:
The providers that struggle will be those that cannot explain how money flows through the chain.
Payslip transparency is central to the whole issue.
A worker should be able to understand how the assignment rate becomes gross pay and how gross pay becomes net pay. The calculation should not be hidden behind vague terminology or confusing deductions.
A good umbrella payslip or reconciliation should make clear:
If contractors, agencies and end clients cannot understand the pay flow, that is a risk.
The days of treating umbrella payroll as a black box are coming to an end.
Accreditation can be useful, but it should not be treated as a complete answer.
An umbrella company may hold an accreditation and still need to demonstrate ongoing compliance. Agencies and end clients should treat accreditation as one part of due diligence, not a substitute for it.
The stronger approach is layered assurance:
The question should not be, “Does this umbrella have a badge?”
The better question is, “Can this umbrella prove, with current evidence, that workers are being paid correctly and PAYE is being operated properly?”
Contractors, agencies and end clients should be cautious where they see any of the following:
Not every issue automatically proves non-compliance, but these are warning signs that should be investigated.
Joint and several liability should not be confused with wider umbrella company regulation.
The 2026 JSL rules are mainly about PAYE and National Insurance compliance in labour supply chains.
The expected 2027 umbrella company regulation is about bringing umbrella companies within a wider employment rights regulatory framework.
They are connected because both reforms aim to improve standards in the umbrella market. However, they deal with different problems.
JSL is about tax accountability.
Umbrella regulation is about employment rights, transparency and statutory oversight.
Together, they represent a major tightening of the umbrella company market.
The practical work should already be underway.
Agencies and end clients should review existing umbrella supply chains and identify any weak points. They should check whether every umbrella company being used is approved, whether approval is evidence-based, and whether ongoing monitoring exists.
A good action plan should include:
The most important word is evidence. If a business is challenged, it will need to show what it knew, what it checked and what action it took.
Contractors should not wait for agencies or end clients to do all the work.
Before joining an umbrella company, contractors should ask for a clear illustration and compare it with standard PAYE expectations. They should check whether the umbrella company is on the agency’s approved list and ask why it has been approved.
Contractors should also keep copies of:
If something looks wrong, it should be raised quickly in writing.
A compliant umbrella company should be able to explain pay clearly. If the explanation is confusing, evasive or too good to be true, that is a reason to pause.
Joint and several liability changes the umbrella company market because it changes who carries the risk.
The umbrella company remains responsible for operating PAYE correctly, but agencies and end clients can no longer treat umbrella compliance as someone else’s problem. If the umbrella fails, the tax risk can move up the chain.
For contractors, the change should lead to better oversight, clearer payslips and fewer non-compliant providers entering the market.
For agencies, it means stronger due diligence, tighter preferred supplier controls and better evidence.
For end clients, it means asking better questions about the labour supply chain.
For umbrella companies, it means transparency is no longer optional.
The best providers and the best supply chains should welcome this. A market built on clear pay, proper PAYE, strong records and honest communication is better for everyone.
The message is simple: umbrella compliance now has to be proven, not assumed.
Important note: This article is for general information only and should not be treated as legal, tax or employment advice. Contractors, recruitment agencies, end clients and umbrella companies should seek professional advice based on their specific circumstances.