Use the online form to apply for a refund of Class 4 National Insurance contributions.
To apply for a refund of Class 4 National Insurance contributions you can:
- use the online service (sign in to or set up a Government Gateway account)
- fill in the postal form on-screen, print and post it to HM Revenue and Customs.
If you use the online form, you’ll get a reference number that you can use to track the progress of your form.
Before you start using the postal form
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You’ll need to fill in the postal form fully before you can print and post it. You can’t save a partly filled in form so you should gather all your information together before you start to fill it in.