As a self-employed freelancer in the United Kingdom, you are liable for two main taxes. Income Tax is charged on your taxable profits, and National Insurance Contributions (Class 4 NICs) are also calculated on your profits and collected alongside your Self Assessment.
If your annual turnover exceeds £90,000, you will also need to register for VAT. The keyword here is profits, not turnover. This is precisely why keeping accurate records of your expenses is essential for managing your self-employed tax obligations.
Income Tax Rates for 2025/26
Income Tax in England, Wales and Northern Ireland is calculated using a system of tax bands:
- Personal Allowance: Up to £12,570 at 0%
- Basic Rate: £12,571 to £50,270 at 20%
- Higher Rate: £50,271 to £125,140 at 40%
- Additional Rate: Over £125,140 at 45%
If your income exceeds £100,000, your Personal Allowance is gradually reduced by £1 for every £2 earned above that threshold, disappearing entirely at £125,140.
National Insurance: The Tax Freelancers Often Overlook
Many new freelancers focus solely on Income Tax and forget about National Insurance.
Class 2 NICs
Since April 2024, mandatory Class 2 NICs have been abolished for most self-employed individuals. If your profits exceed £6,845, you are automatically treated as having paid Class 2 contributions. If your profits fall below this threshold, you may choose to pay voluntary contributions at £3.50 per week.
Class 4 NICs (2025/26)
- 6% on profits between £12,570 and £50,270
- 2% on profits above £50,270
How Much Tax Should a UK Freelancer Set Aside?
Our recommended savings rule:
- Up to £30,000 profit: Set aside 20% of your income
- £30,001 to £50,000: Set aside 25% of your income
- £50,001 to £100,000: Set aside 30-35% of your income
- Over £100,000: Set aside 35-40% of your income
These percentages include a comfortable buffer. It is always better to have a little extra in your tax savings account than to find yourself short when the bill arrives.
Payments on Account: The January Surprise
If your Self Assessment tax bill exceeds £1,000, HMRC will require you to make Payments on Account. This is the most common shock in freelancer tax, particularly in your second year of trading.
HMRC assumes your next year's tax bill will be roughly the same as the current year's, so they ask you to pay half of it in advance. On 31 January, you are not just paying your previous year's tax but also the first instalment towards next year's bill.
VAT: When Does It Kick In?
You must register for VAT if your taxable turnover exceeds £90,000 in any rolling 12-month period. Once registered, you will charge VAT at 20% on top of your invoices and submit quarterly VAT returns.
If your turnover is below the threshold, you can still register voluntarily. This can be advantageous if most of your clients are VAT-registered businesses.
5 Practical Tips to Manage Your Freelancer Tax
1. Open a Separate Tax Savings Account
Every time you get paid, transfer your set-aside percentage into a dedicated savings account. This single habit prevents the vast majority of tax payment crises among UK freelancers.
2. Track Your Expenses Religiously
Every legitimate business expense reduces your taxable profit. Common allowable expenses include software subscriptions, office supplies, professional development, travel costs, and home office costs. You can claim £6 per week (£312 per year) for working from home without needing receipts.
3. Use Cloud Accounting Software
Tools like Xero, FreeAgent, or QuickBooks automate much of the bookkeeping and estimate your tax liability in real time. This is especially important as Making Tax Digital for Income Tax launches in April 2026.
4. File Early, Pay on Time
You can submit your Self Assessment return as soon as the tax year ends on 5 April, even though the deadline is 31 January. Filing early gives you months to plan how to pay your bill.
5. Get Professional Advice
A good accountant does not just file your return. They help you plan ahead, claim every allowance you are entitled to, and avoid costly mistakes.
Key Tax Dates Every UK Freelancer Should Know
- 5 April: End of the tax year
- 5 October: Deadline to register for Self Assessment (first year)
- 31 October: Paper tax return deadline
- 31 January: Online Self Assessment deadline + tax payment + 1st Payment on Account
- 31 July: 2nd Payment on Account
Missing these deadlines can result in automatic penalties. HMRC charges a £100 late filing penalty if your return is even one day late.
How Ollen Services Can Help
At Ollen Services, we specialise in supporting self-employed professionals and freelancers across the United Kingdom. From registering for Self Assessment and bookkeeping to tax planning and filing your return, we take the complexity out of your finances so you can focus on what you do best.
Get in touch today for a free consultation, and let us make sure you are never caught off guard by a tax bill again. Contact us at hello@ollenservices.co.uk or call 07513 491 259.