Side Hustle Tax Calculator 2026/27
Last updated: March 2026 — Rates for the 2026/27 tax year
Calculate how much tax you owe on your side hustle income. Covers the HMRC trading allowance, income tax, and National Insurance for self-employed earners.
Frequently Asked Questions
What is the £1,000 trading allowance?▾
The trading allowance lets you earn up to £1,000 per year from self-employment without paying tax or registering for Self Assessment. If your income exceeds £1,000, you can deduct the allowance instead of tracking actual expenses.
Do I need to register for Self Assessment?▾
If your gross side hustle income exceeds £1,000 per year, you need to register for Self Assessment with HMRC by 5 October following the end of the tax year.
What expenses can I claim on my side hustle?▾
You can deduct business expenses such as equipment, mileage (45p/mile for the first 10,000 miles), phone costs, software subscriptions, materials, and a proportion of home office costs.