Side hustle tax in the UK
The £1,000 trading allowance, when you must tell HMRC and what you might pay.
The short answer
You can earn up to £1,000 a year from side work, selling things as a business or casual services before you need to tell HMRC. This is the trading allowance. If your gross income from it is more than £1,000, you need to register for Self Assessment and report it.
The trading allowance
- It covers income, not profit. The test is your gross income before costs.
- Under £1,000 and you generally do not need to tell HMRC or pay tax on it.
- Over £1,000, you can either deduct your real expenses or deduct the £1,000 allowance instead, whichever is better. You cannot do both.
- It does not apply to income from your own company, a partnership, or from your employer.
What tax you would pay
Profit from side work is added to your other income, so it is taxed at your usual rates. You may also pay Class 4 National Insurance at 6% on profits between £12,570 and £50,270, and 2% above that. The self-employed tax calculator estimates this for you.
When to register
If your gross trading income goes over £1,000, you must register for Self Assessment by 5 October after the end of the tax year. For 2025/26 that is 5 October 2026. See Self Assessment deadlines for the other dates.
Selling things online
Selling a few unwanted personal items, like old clothes, is usually not trading. Buying things to resell, or making items to sell, can count as a trade. Online platforms such as eBay, Vinted and Airbnb now report seller information to HMRC, so it is worth getting it right.
Where to learn more
- GOV.UK: Tax-free allowances on property and trading income
- GOV.UK: Check if you need to send a tax return
This guide is for information only and is not tax or financial advice.