Pay voluntary Class 3 National Insurance
Send a cheque through the post
You can pay by sending a cheque to:
HM Revenue and Customs
National Insurance Contributions and Employer Office
BX5 5BD
You must make sure your payment reaches HMRC by the 5 April deadline.
What to include
HMRC’s payment request to you will include a payslip with an 18-digit reference number on it. Send the payslip along with your cheque.
Write your 18-digit reference number on the back of the cheque.
If you use the wrong reference number your payment may be delayed or used to pay a different tax bill that you owe. If your payment has paid the wrong tax bill, you can contact National Insurance enquiries to ask for your payment to be moved.
Do not fold the payslip or cheque, or fasten them together.
If you want a receipt, include a note asking for one.
If you do not have an HMRC payslip
Include a note with:
- your name, address and phone number
- how much you’re paying
- the period you’re paying for
- your 18-digit reference number or National Insurance number
If you do not have an 18-digit reference number, you can:
- ask HMRC online
- phone the National Insurance enquiries line if you cannot ask HMRC online
After you’ve paid
Your National Insurance record and personal tax account will be updated after HMRC gets the payment. This can take up to 8 weeks.