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How to start freelancing in the UK: registration and tax basics explained

By FastBuySale Newsroom · 9 Nov 2026 · 14m ago

What freelancing means in tax terms

Freelancing in the UK usually means working for several clients on your own terms, invoicing for each job and being responsible for your own tax. In law, most freelancers are self-employed. They are not on a client's payroll, so no tax or National Insurance is taken off their payments, and they do not get employment rights such as holiday pay or statutory sick pay from clients.

This guide explains how to get started properly, using the rules HMRC publishes. It covers the 2026 to 2027 tax year, which runs from 6 April 2026 to 5 April 2027. Thresholds and rates change, so check the current figures before you rely on them.

Step 1: choose a business structure

There are three common options. A sole trader is the default for most freelancers: you and the business are legally the same, you keep all profits after tax and you are personally responsible for debts. A limited company is a separate legal entity that you set up with Companies House; you become a director, the company pays Corporation Tax on its profits and you take money out as salary or dividends. A partnership is for two or more people running a business together.

For most people starting out, sole trader is simpler and cheaper to run. A limited company can make sense later, for example when profits are high, when clients insist on it or when you want to separate business liabilities from personal ones. Switching from sole trader to company is possible, so you do not need to decide forever on day one.

Step 2: check whether the trading allowance covers you

The trading allowance lets you earn up to £1,000 a year in gross trading income tax-free without registering. It is aimed at small, occasional income, such as a few design jobs or a weekend of tutoring. If your gross income is above £1,000, you can either deduct the £1,000 allowance instead of actual expenses or deduct your real expenses, whichever gives the better result. You cannot do both.

Step 3: register for Self Assessment

If you are a sole trader with more than £1,000 of gross trading income, you must register for Self Assessment as self-employed. You need to register by 5 October following the end of the tax year in which you started. HMRC then sends a Unique Taxpayer Reference, and you set up an online account to file returns.

The online return for each tax year is due by 31 January after the year ends, and that is also when any tax owed is paid. Missing the deadline brings an automatic £100 penalty, with more if the delay continues.

Step 4: understand what you will pay

Your profit is your income minus allowable expenses. Income Tax is charged on your total income, including any salary, after the personal allowance, which is £12,570 for most people. Class 4 National Insurance applies to self-employed profits: for 2026 to 2027 it is 6% on profits between £12,570 and £50,270 and 2% on profits above that. Class 2 contributions are no longer compulsory, although people with low profits can pay voluntarily to protect their State Pension record.

Once your tax bill passes a set level, HMRC also asks for payments on account, which are advance payments toward the next year's bill made in January and July. This often surprises new freelancers in their second year, when they pay last year's balance and half of next year's estimate at the same time.

Worked example: a first-year freelancer

Priya leaves a job in May 2026 and starts freelancing as a copywriter. By 5 April 2027 she has invoiced £34,000 and has £4,000 of allowable expenses, so her profit is £30,000. She has no other income. Her personal allowance covers the first £12,570. Income Tax at 20% on the remaining £17,430 is about £3,486. Class 4 National Insurance at 6% on profits between £12,570 and £30,000 is about £1,046. Her total is roughly £4,532, due by 31 January 2028, plus a first payment on account for the next year.

Priya registers by 5 October 2027 at the latest, but she does it in her first month so she gets her reference early. She moves 25% of every invoice into a savings account, which leaves a buffer above the bill. The salary calculator on this site can help compare employed pay with freelance profit.

Step 5: expenses you can claim

Allowable expenses are costs incurred wholly and exclusively for the business. Common examples include equipment and software, a share of home running costs if you work from home, business travel, professional subscriptions, training to update existing skills, insurance and accountancy fees. Personal costs, everyday commuting and entertaining clients are not allowable. You can use simplified flat rates for vehicle mileage and working from home instead of working out actual costs.

Step 6: VAT, invoices and records

VAT registration is compulsory once your taxable turnover goes over £90,000 in any rolling 12-month period, or if you expect it to exceed that in the next 30 days. You can register voluntarily below the threshold, which can help when most clients are VAT-registered businesses.

Each invoice should show your name, a unique number, the date, the client's details, a description of the work, the amount and payment terms. Keep records of income, expenses and receipts for at least five years after the 31 January filing deadline. Making Tax Digital for Income Tax is being phased in for sole traders with higher incomes, starting from April 2026 for qualifying income over £50,000, so check whether it applies to you.

Step 7: protect yourself and your clients

Consider professional indemnity insurance if you give advice or produce work clients rely on, and public liability insurance if you visit client premises. Use a written contract or terms that set out scope, fees, deadlines, ownership of work and how disputes are handled. If you handle personal data for clients, the UK GDPR applies to you too.

If you work through an agency or for one main client in a way that looks like employment, the off-payroll working rules, often called IR35, may apply. Under these rules, medium and large clients decide whether a contractor working through their own company is, in reality, an employee for tax purposes.

Common mistakes new freelancers make

- Waiting until January to think about tax, then being short of cash.

- Forgetting payments on account in the second year.

- Mixing personal and business spending in one account.

- Charging rates that do not cover tax, pension, holidays and unbilled time.

- Not chasing late invoices; businesses can claim statutory interest on late payments from other businesses.

Setting your rates realistically

An employee's salary is not comparable with a freelance day rate. As a freelancer you pay for your own holidays, sick days, pension, equipment and the hours spent finding work. A common approach is to start from the annual income you want, add your expected business costs, and divide by the number of days you realistically expect to bill, often 150 to 200 days rather than 260. The percentage calculator linked on this page can help check how much of each invoice to set aside.

Sole trader or limited company: a quick comparison

As a sole trader, registration is free and quick, your accounts can be simple and your profit is taxed through Self Assessment. As a limited company director, you file annual accounts and a confirmation statement with Companies House, run payroll if you pay yourself a salary and file a Corporation Tax return, but your personal assets are generally protected from business debts. Some larger clients prefer to contract with companies. The right choice depends on profit level, risk and how much administration you are willing to handle, which is why many people start as sole traders and review the decision after a year or two.

Getting started this week

Write a short list of services and target clients, set a starting rate, open a separate bank account, register with HMRC if you expect income above £1,000, create a simple spreadsheet for income and expenses and draft a standard contract. Then tell people what you do. Most freelancers find early work through former colleagues, clients and personal networks before marketplaces or adverts.

This article is general information about UK rules and is not tax, legal or financial advice. For complex situations, such as a limited company, foreign income or high earnings, speak to an accountant or check HMRC's guidance.

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