The countdown to April 2026 has begun. As HMRC shifts the burden of PAYE liability up the supply chain, Neil Swift and Rachel Cook of Peters & Peters explain why accountants must look past the paperwork to protect clients from systemic umbrella non-compliance.
From 6 April 2026, new rules will come into force targeting non-compliance by those who market and operate umbrella companies. While these reforms sit within the Finance Act 2026, they should not be viewed as a technical adjustment to payroll or tax administration. They reflect a more fundamental shift in how HMRC approaches risk within labour supply chains.
For accountants advising businesses that engage temporary workers, the changes require careful attention. The underlying issue is not simply the use of umbrella companies, but the way in which fragmented supply chains have, in some cases, enabled significant tax non-compliance.
Umbrella companies play an important role in the modern labour market, particularly in sectors that rely heavily on temporary or contract staff, including IT, engineering, healthcare, construction and education. They typically employ workers and operate PAYE on their earnings, sitting between recruitment agencies and end clients. However, the structure of these arrangements, often involving multiple entities with differing responsibilities, has created opportunities for abuse.
HMRC has identified a range of non-compliant practices within the sector. One of the most prominent is the use of “mini umbrella company” models. In these arrangements, a workforce is split across multiple small companies, each designed to fall within thresholds for tax reliefs intended for genuine small businesses, including the Employment Allowance and, in some cases, VAT regimes such as the Flat Rate Scheme.
While each company may appear independent, HMRC has found that some apparently unconnected companies are centrally controlled. Tax liabilities may be underpaid or left unpaid altogether, with companies dissolved or replaced before HMRC is able to recover the sums due. The deliberate fragmentation of the labour supply chain, combined with the ease of creating new entities, can make enforcement particularly challenging.
HMRC has also highlighted patterns such as the movement of workers between umbrella companies without a clear commercial rationale. This can indicate that structures are being used to obscure non-compliance rather than for legitimate operational reasons.
In more serious cases, HMRC has recognised that these arrangements can be exploited by organised criminals. The scale of potential losses, particularly in relation to VAT and PAYE, has made this an area of increasing focus for its Fraud Investigation Service, which deals with the most serious cases of tax fraud.
The government has concluded that non-compliance by those who operate umbrella companies is not isolated, but systemic. It affects workers, compliant businesses and the Exchequer alike. Workers may face unexpected tax liabilities, compliant businesses are undercut by those operating non-compliant models, while the tax gap widens further.
A key difficulty has been the ability of non-compliant operators to avoid enforcement. Companies can be established and dissolved relatively quickly, with little realistic prospect of recovery. While recent reforms to the Companies House regime are intended to increase scrutiny of company formation and dissolution, and verify information about company ownership and control, these structural challenges remain.
In that context, traditional enforcement tools, whether civil or criminal, are often reactive and resource intensive. The reforms are therefore designed to directly address these systematic issues rather than target isolated instances of wrongdoing.
At the centre of the new regime is a shift in responsibility within the labour supply chain. From 6 April 2026, where an umbrella company is used, responsibility for operating PAYE may, depending on the structure of the arrangement, move away from the umbrella company and instead sit with the recruitment agency, or in some cases the end client. In practical terms, this means that those higher up the chain may become liable where PAYE is not correctly accounted for, even if the failure arises further down the chain. The intention is to ensure that ultimate responsibility rests not with entities that can easily be dissolved, but with those with a vested interest in ensuring compliance.
This represents a significant shift from the previous position, where responsibility generally sat with the umbrella company itself.
Although the reforms are framed in tax and regulatory terms, they sit against a broader enforcement backdrop.
HMRC has already identified labour supply chains as an area where civil non-compliance and criminal fraud overlap. In more serious cases, particularly those involving organised or repeated behaviour, criminal investigation is a realistic possibility.
There is also a wider legal context to consider. Under the corporate criminal offence of failure to prevent the facilitation of tax evasion, businesses may face criminal liability where associated persons within their labour supply chain facilitate tax evasion, even if the business itself was unaware. This has led to an increased focus on supply chain due diligence and risk management.
Taken together, these developments point to a more interventionist approach. The emphasis is not only on recovering lost tax, but on actively discouraging errant behaviour across the supply chain and, where necessary, pursuing those who facilitate non-compliance.
For accountants, the practical implications are significant.
First, there is a need to understand how labour is supplied, not just how it is paid for. This means looking beyond contractual arrangements to the underlying structure of the supply chain. Where umbrella companies are involved, it will be important to consider whether their use is commercially justified and whether there are any indicators of non-compliance.
Secondly, due diligence will become increasingly important. This includes understanding who is involved in the supply chain, how they operate, and what checks are in place to ensure compliance with PAYE and VAT obligations. Documentation of these processes is likely to be critical.
Thirdly, clients should be made aware that risk is no longer confined to the entity directly engaging workers. The shift in liability means that exposure may arise higher up the chain, particularly where appropriate oversight is lacking.
Finally, these changes should be understood in the context of HMRC’s broader enforcement priorities. With VAT and PAYE fraud in labour supply chains identified as a priority area, scrutiny is likely to increase as the new rules come into force.
The upcoming reforms are part of a wider shift in how HMRC approaches compliance in complex labour supply chains. By reallocating responsibility within the supply chain, the intention is to address longstanding vulnerabilities inherent in the use of umbrella companies.
For accountants, the message is clear. These changes are not simply administrative. They require a more detailed understanding of how labour supply chains operate, and a more proactive approach to identifying and managing risk.
As April 2026 approaches, those advising in this area will need to ensure that clients are not only aware of the new rules, but prepared to operate within a system where accountability is more clearly defined, and where responsibility for compliance increasingly sits with those best placed to manage the risk.
