HMRC Name Change & National Insurance Guide

3 Ways to Change Your Name with HMRC

Option 1: Online via Government Gateway (Fastest)

The quickest way to change your name on your National Insurance record and tax account is online:

1. Log in to your Personal Tax Account via GOV.UK using your Government Gateway ID.
2. Navigate to "Profile" and select "Change legal name".
3. Enter your new legal name details and upload a photo/scan of your signed Deed Poll or Marriage Certificate.
4. HMRC typically processes online name change requests within 3–5 working days.

Option 2: Via the HMRC Official Mobile App

You can download the official HMRC App on iOS or Android, authenticate with Face ID / Touch ID, and update your personal details directly within the app settings.

Option 3: By Post

If you do not have online access, send a written letter specifying your old name, new name, date of birth, and National Insurance number along with an original or certified copy of your Deed Poll to:

Special Tax Considerations

• Self Assessment: If you file a UK tax return, your Self Assessment name will automatically update once your central HMRC profile is updated.
• Tax Credits & Child Benefit: If you receive Tax Credits or Child Benefit, notify the Tax Credit Helpline separately on 0345 300 3900 to ensure payments are not delayed.
• Marriage & Civil Partnership: If you are changing your surname after marriage, a Marriage Certificate is sufficient. If you are double-barrelling or choosing a new surname, a Deed Poll is required.

Frequently Asked Questions