Do I actually need to file a tax return?

If you've picked up some self-employed work, started renting out a room, or your income has crept up, you might be wondering whether HMRC now expects a tax return from you. Here's how to tell — in plain English.

Most employed people never touch a tax return, because tax comes straight out of their wages through PAYE. A Self Assessment return is HMRC's way of collecting tax on income that isn't taxed at source. So the real question is: do you have any of that kind of income?

You'll usually need to file if…

• You're self-employed (a sole trader) and earned more than £1,000 from it in the tax year. That £1,000 is the "trading allowance" — earn less and you generally don't need to declare it.
• You rent out property and your rental income is more than £1,000 (there's a separate £1,000 property allowance too).
• You had to pay the High Income Child Benefit Charge, or your income was over £100,000.
• You made capital gains — for example selling a second property, shares or crypto at a profit above the annual allowance.
• You had untaxed income from savings, dividends, tips, commission or income from abroad.

What's changing from April 2026

If you're self-employed or a landlord, the way you report is changing under Making Tax Digital for Income Tax. Instead of one return a year, you'll send HMRC digital updates every quarter. It's being phased in by income level — over £50,000 from April 2026, over £30,000 from April 2027, and over £20,000 from April 2028. We've written a full plain-English guide to Making Tax Digital if you'd like the detail.

Not sure where you stand?

You don't have to work it out alone. Our free 30-second check asks a few simple questions and tells you roughly whether — and when — you need to file. No sign-up, no catch.

This guide is general information, not personal tax advice, and thresholds and allowances can change at each Budget — always confirm the current figures on GOV.UK or ask us to check your exact position. Figures quoted reflect the 2025/26 tax year.