Do you need to register for Self Assessment for the first time?

Check if you need to register for Self Assessment for the first time by Sunday 5 October 2025.

You must tell HM Revenue & Customs (HMRC) by Sunday 5 October 2025, if you need to complete a Self Assessment tax return for the 2024-25 tax year and you have not sent one before. The 2024-25 tax year started on 6 April 2024 and ended on 5 April 2025.

Who may need to register for Self Assessment?

You might need to register for Self Assessment for the first time if you:

• have earned more than £1,000 through a side hustle
• are self-employed
• rent out a property

If you've registered before

If you’ve registered for Self Assessment before but did not send a tax return last year, you must register again to reactivate your account.

Use HMRC's tool to check if you need to send a Self Assessment tax return.

How to register for Self Assessment

Check how to register for Self Assessment.

First published 9 September 2025