A First-Year Tax Guide for UK Freelancers and Self-Employed Business Owners
Updated: Aug 1
Registering with HMRC
Starting out as a freelancer or sole trader in the UK comes with a learning curve, and tax is usually top of the list of things new business owners feel unsure about. The good news is that once you understand the basic obligations, staying compliant becomes far more manageable.
Your first step is registering with HMRC. You need to do this by 5 October following the end of the tax year in which you started freelancing. For example, if you started freelancing during the 2026/27 tax year (6 April 2026 to 5 April 2027), you'll need to register by 5 October 2027. HMRC will then post you a Unique Taxpayer Reference (UTR), which can take a couple of weeks to arrive, so it's worth registering as early as possible.
Understanding Self Assessment
If you earn more than £1,000 a year from self-employment, you'll need to file a Self Assessment tax return each year, reporting your income and expenses to HMRC. Returns are filed online and due by 31 January following the end of the tax year. Keeping organised records throughout the year, rather than scrambling in January, makes this process far less stressful.
Income tax and National Insurance
As a self-employed individual, you'll pay income tax on your profits above your personal tax-free allowance (£12,570 for 2026/27), with rates starting at 20% and rising to 45% for higher earners. You'll also pay Class 4 National Insurance: 6% on profits between £12,570 and £50,270, and 2% above that. Understanding how these figures apply to your own income helps you budget accurately throughout the year, rather than facing a surprise bill.
Keeping an eye on the VAT threshold
As your freelance business grows, it's worth keeping an eye on your turnover against the VAT registration threshold, currently £90,000 for 2026/27. If you cross this threshold, you're required to register for VAT, which changes how you invoice and file with HMRC. Planning ahead, rather than being caught out, makes the transition much smoother.
Staying on top of payment deadlines
Beyond your Self Assessment return, most freelancers also make 'payments on account', advance payments towards next year's tax bill. These are typically due on 31 January (alongside your balancing payment) and 31 July. Missing these deadlines can result in interest and penalties, so it's worth building them into your financial planning from day one.
Get in touch
Freelancing brings a lot of freedom, but also a lot of new responsibility when it comes to tax. MSE Accounting supports freelancers and self-employed business owners across the UK with clear, practical guidance so you can focus on your work with confidence. Get in touch to make sure your first year gets off to the right start.
