by Asim Abbas
11 November 2026 
Employed or self-employed? How employment status is decided
Employed or self-employed? How employment status is decided
Whether someone is employed or self-employed affects how they’re taxed, their rights and the business’s obligations. The label in a contract doesn’t decide it.
- Status depends on the reality, not the label
- Key tests: control, substitution, mutuality
- HMRC’s CEST tool gives a view
- Businesses can be liable for unpaid PAYE
HMRC and the courts look at how the working relationship actually operates. Getting it wrong can mean back tax, NI and penalties for the business.
This guide explains the key tests and what businesses and workers should check.
Why it matters
| Employed | Self-employed | |
|---|---|---|
| Tax | PAYE through payroll | Self Assessment |
| National Insurance | Class 1, employer pays 15% | Class 4 |
| Holiday and sick pay | Yes | No |
| Pension auto-enrolment | Yes, if eligible | No |
| Expenses | Limited | Wider range |
The key tests
- Control: who decides what, how, when and where the work is done?
- Personal service: can the worker send a substitute?
- Mutuality of obligation: is there an obligation to offer and accept work?
- Financial risk: does the worker risk their own money?
- Equipment: who provides tools and equipment?
- Integration: is the worker part of the organisation?
- Multiple clients: does the worker work for others?
Salary after tax calculator
Compare employed take-home.
A café pays a “freelance” barista who works fixed shifts set by the manager, wears the café’s uniform, uses its equipment and can’t send someone else. Despite the contract, HMRC would almost certainly treat her as an employee. The café could owe PAYE, employee and employer NI, and holiday pay arrears.
Check Employment Status for Tax
HMRC’s CEST tool asks questions about the engagement and gives a view. HMRC will stand by the result if the answers are accurate and match practice. It doesn’t cover employment rights.
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Get a fixed-fee quoteCall 0161 531 4179The “worker” category
Employment law also has a middle category of worker, with rights such as minimum wage and holiday pay, but tax law only recognises employed or self-employed. Platform workers are often in this area.
What businesses should do
- Review each engagement, not just the contract
- Keep evidence of substitution, control and risk
- Revisit status when roles change
- Put genuine employees on payroll
For contractors using their own company, see our IR35 guide. Check HMRC’s CEST tool, or our payroll services.
What should I do next?
Employees and freelancers.
Control, substitution, risk.
Keep the result.
Frequently Asked Questions
Does a contract decide if I’m self-employed?
No. HMRC looks at how the work actually happens.
What is the substitution test?
Whether the worker can genuinely send someone else to do the work.
What is CEST?
HMRC’s online tool for checking employment status for tax.
What happens if a business gets status wrong?
It can owe PAYE, NI, interest and penalties.
Can I be employed and self-employed at the same time?
Yes, for different work.
Need help with this? Wingate Accountants offers fixed-fee online accountancy support across the UK. Call 0161 531 4179 or request a quote at wingateaccountants.co.uk.
About the Author
Asim Abbas
I’m Asim Abbas, founder of Wingate Accountants and a Chartered Certified Accountant. I help sole traders, landlords and directors stay on top of their tax with fixed fees and plain-English advice.
