Apply for Marriage Allowance online

You can apply for Marriage Allowance online, however there are different ways to apply if: 

• you are registered for Self Assessment 
• you want to backdate your claim

If your husband, wife or civil partner was born before 6 April 1935, you might pay less tax as a couple by applying for Married Couple’s Allowance instead.

This service is also available in Welsh (Cymraeg).

Before you apply

To use this service, you’ll need your National Insurance number and your partner’s National Insurance number.

If you have come to the UK and you do not plan to work or study, you cannot get a National Insurance number. Phone the Income Tax helpline to apply for Marriage Allowance.

You’ll need to sign in to use this service. If you do not already have sign in details, you’ll be able to create them.

You’ll be told when you sign in if you need to prove your identity. This is to keep your details safe and usually involves using photo ID like a passport or driving licence.

Apply online

The quickest way to apply for Marriage Allowance is online. You’ll get an email confirming your application within 24 hours.