HMRC continues its aggressive pursuit of businesses that engage temporary or contract workers, particularly those supplying services through Limited Company Contractors (LCCs) or personal service companies. The recent tax case of K5K Limited v HMRC serves as a stark warning to employment agencies and businesses operating in highly regulated sectors, such as healthcare, that fail to properly assess their tax obligations under agency worker legislation.
The First-tier Tribunal’s decision, which upheld significant tax assessments for unpaid PAYE and National Insurance Contributions (NICs), demonstrates how HMRC is using Section 44 of the Income Tax (Earnings and Pensions) Act 2003 (ITEPA) to treat contractors as employees for tax purposes even where personal service companies are involved.
If your business uses contractors, agency workers or LCCs, this case highlights the real risk of facing retrospective tax assessments, penalties, and reputational damage. Our specialist tax dispute solicitors and barristers have a proven track record in defending businesses against HMRC investigations, including Section 44 ITEPA, IR35, PAYE, and NIC claims.
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HMRC’s Agency Worker Crackdown
K5K Limited, trading as 247 Professional Health, operated as an employment business supplying healthcare workers to clients across the UK. Like many in the sector, K5K engaged a significant proportion of its workforce through personal service companies commonly referred to as LCCs.
In July 2018, HMRC issued K5K with 18 decision notices covering three tax years from 2014 to 2017. The assessments totalled nearly £261,000 in unpaid income tax and NICs, arising from HMRC’s conclusion that K5K had incorrectly treated workers as self-employed contractors when, in reality, they should have been taxed as employees under Section 44 ITEPA.
K5K appealed the assessments to the First-tier Tribunal (Tax Chamber), arguing that HMRC had misapplied the legislation and that the assessments were invalid on procedural grounds. However, the Tribunal ultimately ruled in HMRC’s favour, providing crucial insight into how courts interpret agency worker rules and contractor arrangements.
What is Section 44 ITEPA 2003 and Why Does It Matter?
Section 44 ITEPA, often referred to as the “agency legislation,” is designed to prevent tax avoidance where workers provide services via intermediaries, such as employment agencies or personal service companies, but in substance operate as employees.
The legislation applies where:
- An individual personally provides services to a client;
- There is a contract between the client and an intermediary (such as an agency); and
- The individual is subject to supervision, direction, or control in how the work is carried out.
If these conditions are met, the intermediary (the agency) is responsible for operating PAYE and paying Class 1 NICs as if the worker were an employee.
Section 44 is particularly significant in sectors like healthcare, construction, and logistics, where agencies often engage workers through LCCs or umbrella companies, believing this distances them from employment tax liabilities.
Common Reasons Businesses Lose PAYE and NIC Appeals Against HMRC
The recent Tax Tribunal decision serves as a clear warning to businesses that rely on Limited Company Contractors (LCCs) or personal service companies without properly considering their tax obligations. Below are some of the key reasons businesses fail in defending PAYE and National Insurance Contributions (NIC) appeals brought by HMRC under Section 44 of the Income Tax (Earnings and Pensions) Act 2003 (ITEPA).
1. Personal Service, Regardless of Corporate Structures
A common misconception is that by engaging workers through personal service companies or LCCs, businesses can avoid employment tax liabilities. However, the Tribunal made it clear that if the individual themselves personally performs the services, the presence of an intermediary company does not shield the business from PAYE and NIC obligations.
In practice, if a worker personally provides services to a client, the business may still be caught by Section 44 ITEPA, regardless of any company structure in place.
2. Inadequate or Missing Contractual Documentation
Tribunals place significant weight on the quality and timing of contractual documentation. Where businesses fail to produce clear, contemporaneous contracts that accurately reflect the working arrangements, HMRC’s interpretation is more likely to prevail.
In some cases, documents produced after the fact to “regularise” the situation have been rejected as unreliable. Without robust contracts in place, businesses risk being unable to defend themselves and may find that workers are treated as employees for tax purposes by default.
3. Supervision, Direction, and Control by End Clients
The existence of supervision, direction, or control (SDC) over the worker by the client is a key condition that triggers Section 44 ITEPA. This is especially common and often unavoidable in regulated industries such as healthcare, construction, and logistics.
Where workers are subject to instructions on how, when, or where work is performed, businesses are exposed to PAYE and NIC liabilities, even if the engagement is via a personal service company.
4. Weak Procedural Defences and Misunderstanding of Assessment Requirements
Businesses sometimes attempt to challenge HMRC assessments by arguing procedural defects, such as a failure to expressly cite the relevant tax provisions within the assessments themselves. However, tribunals consistently find that there is no statutory requirement for HMRC to set out detailed legal references within assessments.
Moreover, correspondence between HMRC and the business prior to the assessments often demonstrates that the business was aware of the legal issues, undermining any procedural defence.
What This Means for Your Business:
This case should serve as a wake-up call for businesses that rely on agency workers, contractors, or LCCs without fully considering their tax obligations under agency legislation.
HMRC is increasingly focused on ensuring the correct application of PAYE and NICs for workers who, despite operating through intermediaries, are in practice treated as employees. Where businesses fail to comply, HMRC will pursue assessments for unpaid tax and as K5K discovered, tribunals are unlikely to accept weak contractual arrangements or procedural defences.
Please find the detailed judgment below:
How Our Tax Lawyers Can Help
If your business is facing an HMRC investigation under Section 44 ITEPA, IR35, or agency worker legislation, early, specialist legal advice is essential. Our team of tax solicitors and barristers has extensive experience advising and defending businesses in complex PAYE, NIC, and employment status disputes.
We provide:
- Strategic legal advice to assess risk and exposure;
- Contract reviews and compliance support to reduce liability;
- Robust representation in HMRC negotiations;
- Expert advocacy before Tax Tribunals where necessary.
We have successfully defended businesses facing multi-million-pound tax assessments, negotiated favourable settlements with HMRC, and guided clients through complex legal frameworks to safeguard their operations.
Contact Our Leading Tax Dispute Lawyers Today
The consequences of getting agency worker arrangements wrong can be severe, including crippling tax liabilities, penalties, and reputational damage. Do not wait for HMRC to act. Our specialist tax team is ready to provide immediate, practical advice tailored to your circumstances.
We are a specialised firm and also provide:
Urgent Advice and Representation: Our unique expert team includes leading (ex-HMRC and Big Four) tax litigation counsel.
Defence Against Winding-Up Petitions: We can help you negotiate with HMRC for a Time to Pay Arrangement (TTP) or explore options like a Company Voluntary Arrangement (CVA) to rescue your business.
Preventing Bank Account Freezes: We assist companies in avoiding the advertisement of winding-up petition notices or obtaining a validation order to unfreeze accounts.
Expert Legal Advice on HMRC Investigations: This includes tax avoidance schemes, tax evasion, offshore tax evasion, VAT evasion, and cryptoassets tax investigations.
HMRC Tax Appeals: From Notice of Appeal to HMRC to First Tier Tax Tribunal representation and Judicial Review applications against HMRC.
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Frequently Asked Questions
What is Section 44 ITEPA 2003?
Section 44 of the Income Tax (Earnings and Pensions) Act 2003, often called the “agency legislation,” is designed to prevent tax avoidance where workers are supplied through intermediaries like agencies or personal service companies, but in reality, operate as employees. Where the conditions apply, the agency or intermediary is responsible for operating PAYE and paying National Insurance Contributions (NICs) as if the worker were directly employed.
Who is affected by Section 44 ITEPA?
Section 44 applies to employment agencies, businesses, and any organisation that supplies workers to end clients through intermediaries, such as Limited Company Contractors (LCCs) or personal service companies. It is particularly relevant in industries like healthcare, construction, logistics, and other sectors that rely on temporary or contract workers.
When does Section 44 ITEPA apply?
Section 44 applies when:
✔ An individual personally provides services to an end client;
✔ There is a contract between the client and an intermediary (e.g., an agency);
✔ The individual is subject to supervision, direction, or control (SDC) in how the work is carried out.
If these conditions are met, the intermediary must treat the individual as an employee for tax purposes.
Why are HMRC targeting employment agencies and contractors?
HMRC is actively cracking down on businesses that use contractors, agency workers, or LCCs to avoid employment tax liabilities. The agency worker legislation ensures that, where workers are effectively treated as employees, PAYE and NICs must be correctly operated. HMRC uses Section 44 ITEPA as a powerful tool to enforce compliance, especially in regulated industries.
What are common reasons businesses lose PAYE and NIC appeals?
Tribunals often side with HMRC where businesses:
- Rely on weak procedural arguments against HMRC assessments.
- Engage workers personally, despite corporate structures;
- Fail to produce clear, contemporaneous contracts;
- Allow end clients to exercise supervision, direction, or control over workers;
What are the risks of getting agency worker arrangements wrong?
Businesses that fail to comply with agency legislation risk:
- Potential enforcement action by HMRC, including winding-up petitions or frozen bank accounts.
- Retrospective PAYE and NIC assessments;
- Penalties and interest charges;
- Reputational damage;
How can your firm help with HMRC investigations and Section 44 ITEPA disputes?
Our team of specialist tax solicitors and barristers can:
- Assist with urgent matters such as HMRC enforcement action, winding-up petitions, or frozen accounts.
- Review your contractor and agency worker arrangements;
- Provide strategic advice to minimise tax risks;
- Represent you in negotiations with HMRC;
- Defend you in Tax Tribunal appeals or Judicial Review proceedings;