Guidance

Register for Self Assessment if you are not self-employed

Use form SA1 to register for Self Assessment for any reason other than self-employment.

Who needs to register

How you register for Self Assessment depends on your circumstances. Use form SA1 if you need to register but you鈥檙e not self-employed.

For example, if you:

Before you start

Get all of your information together before you start. You will fill this form in online and you cannot save your progress.

When you fill in the form, you鈥檒l need to tell us your:

  • full name
  • postal address (this can be outside of the UK)
  • date of birth
  • daytime telephone number
  • UK National Insurance number, if you have one

You will also need to explain why you need to register for Self Assessment, and the date this started.

Fill in and send the form online

You鈥檒l need to either:

  • sign in to use this service, if you do not already have sign in details, you鈥檒l be able to create them
  • use your email address to get a confirmation code that you can use to sign in

Fill in, print and post the form

  1. Fill in .

  2. Print and post it to HMRC, using the postal address shown on the form.

This file may not be suitable if you use assistive technology (such as a screen reader). If you need a more accessible format, email [email protected] and tell us what format you need. It will help if you tell us what assistive technology you use. Read the accessibility statement for HMRC forms.

After you鈥檝e registered

We鈥檒l usually contact you within 21 days of receiving your form but may take longer during busy periods.

If you registered online, you may be able to get your Unique Taxpayer Reference (UTR) sooner using the HMRC app or your personal tax account.

If we have not contacted you after 3 weeks, you can聽check when you can expect a reply.

Updates to this page

Published 15 August 2023
Last updated 6 April 2025 show all updates
  1. The adjusted net income has been updated.

  2. The yearly income threshold for the tax year 2023 to 2024 has been updated.

  3. Information about what happens after you have registered has been added.

  4. Added translation

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