Is the document alone sufficient? How HMRC assesses self-employment
In business, it's commonly believed that if something is written in a contract, it serves as a reference point for authorities. If a collaboration is termed "self-employment" and the other party issues invoices as self-employed, many entrepreneurs assume the matter is settled. The document exists, the form has been maintained, and therefore the relationship is compliant with the law.
The British tax authority views this entirely differently. For HMRC, the name of the contract is neither conclusive nor particularly relevant. The document can be a starting point, but never the end point of an analysis. How the authority assesses the relationship between a company and a person performing work is determined not by what is written on paper, but by how that relationship functions in practice.
HMRC doesn't ask "what did you call it," but "how does it work"
In the British tax system, the status of a person performing work does not automatically stem from the contract's content. HMRC does not rely on the parties' declarations or how they perceive their collaboration. The key factors are who actually controls how the work is performed, who bears the risk, and who benefits from its outcomes.
The authority analyzes, among other things, whether the person performing the work has real freedom in accepting assignments, whether they can send a substitute, whether they work according to a fixed schedule, and whether they provide services exclusively for one company. These elements tell HMRC much more than any clause in a contract.
From the authority's perspective, it is therefore possible for a situation where all documents indicate self-employment, yet the relationship is deemed to be an employment relationship.
When everything is "formally in order"
Our client Anna runs a service business in the UK. She operates as self-employed, and four people permanently, plus one occasionally, help her with assignments. Each of them is formally self-employed. They issue invoices, do not have employment contracts, and are not on the payroll.
On paper, everything looks correct. The problem only arises when you look at the company's day-to-day operations. The individuals working for Anna perform tasks according to a set schedule, work exclusively for her, do not have their own clients, and do not bear the risks associated with running a business. Anna organizes the work, sets the rules, and is responsible for client relationships.
We pointed out to Anna that, from HMRC's perspective, such a model begins to resemble traditional employment, regardless of how it has been named.
The moment when paper stops protecting
For an entrepreneur, a key surprise is often that intentions don't hold much weight here. The fact that both parties considered the collaboration to be self-employment and had no intention of circumventing regulations does not change how the authority assesses it.
If HMRC determines that the actual nature of the collaboration meets the criteria for employment, it can challenge the existing payment model. In such a situation, responsibility for overdue taxes and contributions falls on the person running the business, and not on the individuals performing the work. The authority does not correct documents "for the future," but rather analyzes past periods.
Another risk concerns insurance – if the person performing the work suffers an accident or makes a claim, the insurer may refuse to pay compensation if the working arrangement does not reflect its true nature. In such a situation, claims could be made directly against the business owner as an individual, posing a significant risk to their personal assets.
It is then that it becomes clear that the contract, while formally correct, offers no protection.
Why the tax authority has the final say
UK regulations clearly state, that employment status is determined by the actual way work is performed. HMRC does not negotiate this assessment with the taxpayer, nor does it take their word for it. If an operational analysis indicates a dependency typical of an employment relationship, the authority can base its decisions on its own determinations.
For business owners, this means one thing: security doesn't stem from the contract's title, but from the overall structure of the company's operating model. A document not supported by practice not only fails to help, but can also provide a false sense of security.
This mechanism is a cornerstone of the UK's approach to tax and employment. HMRC doesn't dispute documents for the sake of it; instead, it compares them with operational reality. The greater the discrepancy between these two worlds, the less weight is given to what's written on paper.
So, the question worth asking isn't, "What did I call the contract?", but rather: can the way my business operates be defended regardless of that title.
