Why do I need a HMRC Gateway ID to file using my tax return?

Why do I need a HMRC Gateway ID to file using my tax return?

With the introduction of Making Tax Digital (MTD) by HMRC from April 2026 we have taken the decision to introduce the need for all users to file their self assessment tax returns using their own Gateway ID and password from March 2024 onwards.

In addition to this HMRC have recently announced a move to restrict access to their self assessment telephone helpline with the aim of moving more support to digital channels online, for some of these you will need a Gateway ID to access them.

Whilst the vast majority of users already have a Gateway ID and will not be affected by this change we appreciate this may impact some users so we have put together a number of help articles.

By making this change in March 2024 it will give those users without a Gateway ID to apply for one well in advance of the 31 January 2025 self assessment deadline. 

Once you have a Gateway ID and use this for making your self assessment submission then you will receive email confirmation direct from HMRC, you will be able to login to HMRC and also see key information about your tax affairs. 

Below is a list of HMRC services that can be accessed with your Gateway ID via the HMRC website or mobile app.
  • check your Income Tax estimate and tax code
  • check your income from work in the previous 5 years
  • check how much Income Tax you paid in the previous 5 years
  • check and manage your tax credits
  • check your State Pension forecast
  • track tax forms that you’ve submitted online
  • check or update your Marriage Allowance
  • tell HMRC about a change of name or address
  • check or update benefits you get from work, for example company car details and medical insurance
  • find your National Insurance number
  • find your Unique Taxpayer Reference (UTR) number
  • check your Simple Assessment tax bill


 

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