by Asim Abbas
12 November 2026 
HMRC online accounts: the app, Government Gateway and One Login
HMRC online accounts: the app, Government Gateway and One Login
Most of your dealings with HMRC can now be done online, through the HMRC app or your personal tax account.
- Check tax codes, income and refunds online
- Find your UTR and NI number in the app
- HMRC is moving to GOV.UK One Login
- Keep your sign-in details safe
HMRC is gradually moving sign-in from Government Gateway to GOV.UK One Login, which can cause confusion.
This guide explains what you can do online and how to manage your sign-in.
What you can do online
- Check your tax code and estimated income
- See your P60 and employment history
- Claim a refund from a P800
- Find your UTR and National Insurance number
- File and pay Self Assessment
- Set up a Time to Pay arrangement
- Check your State Pension forecast and NI record
- Claim job expenses and Marriage Allowance
Tax code checker
Compare with your HMRC app.
Government Gateway and One Login
Historically, HMRC used Government Gateway user IDs. HMRC is moving services to GOV.UK One Login, which uses your email address and identity checks. You may be asked to create a One Login and link your existing records.
Sara needs her UTR to register with a new accountant. She opens the HMRC app, signs in with her face ID, and finds her UTR under Self Assessment in seconds, rather than waiting for a letter.
Fixed-fee accountancy support
Transparent monthly packages for sole traders, landlords and limited companies. Fixed fees agreed upfront, VAT included.
Get a fixed-fee quoteCall 0161 531 4179Accountants
Accountants use separate agent services accounts and can act for you once you approve the authorisation. You should never share your personal sign-in details with anyone, including your accountant.
If you’re locked out
Use the recovery options on GOV.UK to recover your user ID or reset your password. If identity checks fail, you can verify by post or phone, which takes longer.
Security
- Use a strong, unique password
- Turn on two-step verification
- Never click links in texts claiming to be from HMRC
Download the HMRC app, and see our HMRC scams guide and UTR guide.
What should I do next?
From official stores.
If asked.
Security.
Frequently Asked Questions
Where do I find my UTR?
In the HMRC app or your personal tax account.
What is GOV.UK One Login?
The new government sign-in replacing Government Gateway.
Should I share my login with my accountant?
No. Accountants use their own agent accounts.
Can I check my State Pension online?
Yes, your forecast and NI record.
What if I’m locked out?
Use the GOV.UK recovery options.
Need help with this? Wingate Accountants offers fixed-fee online accountancy support across the UK. Call 0161 531 4179 or request a quote at wingateaccountants.co.uk.
About the Author
Stephen Reynold
I’m Stephen Reynold, an accountant at Wingate Accountants. I work with sole traders and small companies, turning tax rules into clear, practical next steps.
