How Can I Register for Self-Assessment?
To register for Self-Assessment with HMRC, an individual must first determine if they need to complete a tax return. This typically applies to self-employed individuals, those with additional income outside of their salary, or individuals who have received a notice from HMRC requiring them to file a return.
Once it has been established that registration is necessary, the process begins by visiting the official HMRC website. There, one can find detailed guidance on how to register for Self-Assessment online. The online registration process usually requires basic personal information such as name, address, and National Insurance number.
After registering, HMRC will issue a Unique Taxpayer Reference (UTR) number, which is essential for filing tax returns. It is important to complete the registration before the deadline, which is often 5 October in the tax year for which the individual needs to file.
For those who prefer a paper form, HMRC also provides options to register by post, and that information can be found on their website as well. For the most accurate and current information, visiting the HMRC website is advisable.

Answered Jul 2, 2025
Need further help?
Type out your followup or related question and we will get you an answer right away.
Need to contact HMRC?
If you need to talk to HMRC customer service, now that you have the answers
that you needed, click the button below.
Contact HMRC