Self employment and the minimum wage explained

One of the most persistent myths in the contracting world is that working outside of employment means pay protections simply don't apply to you. It's more complicated than that, and getting it wrong can create serious problems, whether you're a contractor choosing how to work or a recruitment business that places them.

Here's what the rules actually say.

Does the self employed minimum wage exist in UK law?

The National Minimum Wage and the National Living Wage apply to employees and workers in UK law. They do not apply to people who are genuinely self-employed. A sole trader invoicing for their services, setting their own hours, and taking on financial risk from their own business has no statutory minimum on what they can charge or earn. The market decides that, not legislation.

But the key word there is "genuinely." 

Employment status in the UK isn't determined by what a contract says, or by what a contractor calls themselves, or by how HMRC registers them for tax purposes. It's determined by the real-world nature of the working relationship. Courts and tribunals have been consistent on this for years. It’s down to the details of the work you do and how you do it. 

The tests that tend to matter most are whether the contractor has genuine control over how and when work gets done, whether they can send someone else in their place, whether they bear financial risk, and whether they work across multiple clients rather than one. If those things are true, self-employed status is likely to hold. If they're not, a tribunal might well find that the individual is actually a worker or even an employee, regardless of how the arrangement has been presented on paper.

What the courts have said: three legal cases worth knowing

Three cases in recent years make this clearer than any amount of theory.

The first is Pimlico Plumbers v Smith, decided by the Supreme Court in 2018. Gary Smith had worked for Pimlico Plumbers for six years as a heating engineer. His contract described him as an independent contractor. He filed his own tax returns as self-employed. 

But the Supreme Court looked past all of that and found he was a worker, because of how the work actually operated day to day. He was required to work a minimum 40-hour week, drive a branded van fitted with a tracker, wear a uniform and carry a company identity card, and he couldn't simply send someone else in his place. 

The contract said one thing; reality said another. The court made clear that the actual day-to-day arrangement with an individual is what matters most, not what is written into a contract.

The second is the Uber case, which reached the Supreme Court in 2021. Uber drivers were found to be workers rather than self-employed, which meant they became entitled to the National Minimum Wage, holiday pay, sick pay and automatic pension enrolment. Uber had argued that because drivers could log off the app whenever they chose, they were running their own businesses. 

The court disagreed, because Uber set the fares, controlled the ratings system, and imposed conditions that left drivers with very little actual independence. The ruling made clear that where a high degree of control is exercised by a business over the individuals working for it, this is a strong indicator that those individuals may be workers with significantly more legal rights.

The third case goes the other way, and it's just as telling`. In November 2023, the Supreme Court ruled on the status of Deliveroo riders, and this time found that they were genuinely self-employed. The court found that riders were free to reject offers of work, make themselves unavailable, and work for competitors, and that these features were fundamentally inconsistent with any notion of an employment relationship. 

Crucially, Deliveroo did not require riders to carry out deliveries personally and allowed them to appoint another person to conduct their work. That genuine right of substitution was decisive.

Taken together, those three cases tell a consistent story. The ability to send a substitute, work for multiple clients, and operate with genuine independence points toward self-employment. Close control, set hours, uniforms, branded vehicles, and no real right to say no points toward worker status, whatever the paperwork says.

Why this matters for contractors and the businesses that engage them

This distinction matters because workers are entitled to the minimum wage. If a contractor has been working in conditions that amount to worker status and has been paid below the minimum wage, there is potential liability for back pay. HMRC can investigate, and the reputational damage for a business caught underpaying someone they called self-employed can be significant.

For recruitment businesses and end hirers, the risk of misclassification isn’t only an issue for the contractor. Under the off-payroll working rules and the joint and several liability provisions that have applied since 2021, incorrect status determinations can create tax liability that travels up the supply chain.

Umbrella employment removes the uncertainty

This is part of why the umbrella model exists and why, when it works properly, it provides clarity that other arrangements don't. A contractor paid through a compliant umbrella company is an employee of that umbrella. They're on payroll. They receive at least the National Living Wage. Holiday pay is calculated and either paid in real time or accrued. There's no ambiguity about status because the employment relationship is explicit and properly documented.

The confusion tends to arise not within umbrella arrangements but around them. Contractors who move between umbrella and direct engagement, or who are pushed into self-employed arrangements by engagers trying to avoid umbrella costs, can find themselves in genuine grey areas. And with the Fair Work Agency coming into force under the Employment Rights Act 2025, the enforcement environment is going to become more active, not less.

If you're a contractor working through an umbrella, you are an employee of that umbrella and you are covered by minimum wage law. A compliant umbrella will be paying you correctly, and you can verify this through your payslips. If something doesn't look right, ask the question. At BoostPay, all payroll is independently verified through SafeRec in real time, which means contractors can see exactly how their pay has been calculated and confirm it's correct before it even hits their account.

If you're a contractor working on a self-employed basis, the minimum wage doesn't apply to the rates you charge clients. But if the way you actually work starts to look more like employment, that self-employed status may not protect you or the people engaging you in the way you might assume.

Employment law has been moving in one direction for some time. The Employment Rights Act 2025 will add further momentum. Status, pay, and compliance are areas where getting proper advice early is considerably less expensive than dealing with the consequences later.