Going freelance in the UK: the rules and what to expect

Freelancing means running a business, even a small one. GOV.UK says you are probably running a business if you:

• take responsibility for its success or failure
• have several customers at the same time
• can decide how, where and when you do your work
• can hire other people at your own expense to help or to do the work for you
• provide the main equipment you need
• have to fix unsatisfactory work in your own time
• charge an agreed fixed price for your work

If a single client sets your hours, supplies your equipment and treats you like staff, check your employment status before you rely on being self-employed. HMRC's Check employment status for tax (CEST) tool gives its view, and HMRC says it will stand by the result as long as the information you give is accurate. Read the full list on GOV.UK's working for yourself page.

GOV.UK says most people start out as a sole trader, the simplest business structure. The main rules, all from GOV.UK:

• Registering. You can start trading without registering, but you must register for Self Assessment as a sole trader if you earn more than £1,000 in a tax year. The deadline is 5 October after the tax year ends, so 5 October 2026 for the year to 5 April 2026, and you could get a penalty if you are late (GOV.UK).
• The £1,000 trading allowance. If your gross trading income is £1,000 or less, it is tax-free. If it is more, you can deduct the £1,000 allowance instead of your actual expenses, but not both. You cannot use it at all in a year when you have trading income from your employer, or from a company or partnership you or someone connected to you owns or controls (HMRC guidance).
• Income Tax. The standard Personal Allowance is £12,570. Above it, the basic rate of 20% applies up to £50,270, the higher rate of 40% up to £125,140 and 45% above that. Scotland has different bands (GOV.UK).
• National Insurance. Class 4 is 6% on profits between £12,570 and £50,270 and 2% above that. If your profits are £7,105 or more, Class 2 is treated as paid, which protects your National Insurance record without you paying it. Below that you can choose to pay voluntary Class 2 at £3.65 a week (GOV.UK).
• Payments on account. Once your yearly Self Assessment bill is £1,000 or more, and you paid no more than 80% of your tax at source, HMRC asks for two advance payments towards next year's bill, due by 31 January and 31 July, each half of last year's tax. In the first year this applies, the January bill can include both the balance for last year and the first advance payment (GOV.UK).
• Making Tax Digital. Sole traders and landlords whose qualifying income for 2024 to 2025 was over £50,000 should have started using Making Tax Digital for Income Tax from 6 April 2026. The threshold falls to £30,000 (2025 to 2026 income) from 6 April 2027 and £20,000 (2026 to 2027 income) from 6 April 2028 (HMRC).

You may also need to register for VAT once your turnover is high enough, and some work needs a licence, insurance or a criminal record check. GOV.UK's sole trader guide lists what to check.

Some freelancers work through their own limited company rather than as a sole trader. The off-payroll working rules, known as IR35, make sure that if you would be an employee were you working for the client directly, you pay broadly the same Income Tax and National Insurance as an employee would.

• For public sector clients, and for clients outside the public sector that are not small, the client decides whether the rules apply and should give you a status determination statement with its reasons.
• For a small client outside the public sector, your own company makes that decision.
• The rules apply contract by contract, so one contract can be inside IR35 and another outside.
• They are unlikely to apply if you are employed by an umbrella company.

HMRC warns that some schemes wrongly claim to get around these rules. If an arrangement promises you will keep far more of your pay than an employee would, get independent advice first.

Self-employed people are also far more likely to work only from home. In the ONS survey for April to June 2026, 35% of self-employed people worked only from home, compared with 12% of employees (ONS, July 2026). If home working is what you want and you would rather stay employed, see our guide to home and hybrid jobs.

• Start on the side if you can. GOV.UK says you can be employed and run a business at the same time. A few paying clients before you resign tell you more than any forecast. Check your contract for rules on outside work first.
• Keep records from the first job. HMRC says you must keep a record of your income even if you use the trading allowance. Its examples include copies of invoices and a spreadsheet of income received.
• Plan for gaps. Nobody pays you when you are ill, on holiday or between clients, and your tax bill arrives months after you earn the money. Build savings before you rely on freelance income alone.
• Try it at low cost first. Smaller gigs are covered in our side hustles guide, including when online platforms report your sales to HMRC.