Self-employed: National Insurance


Tell HMRC about a change to your personal details

Tell HMRC if you have stopped being self-employed

If HMRC needs to contact you about anything confidential they’ll reply by phone or post.

You’ll need to apply for a National Insurance number if you’re moving to the UK to set up a business.


Call HMRC:

  • if you’re self-employed and have a National Insurance enquiry or need to report changes to your personal details
  • to register for National Insurance, Income Tax and VAT if you’ve recently become self-employed

Contact Income Tax: general enquiries if you have a question about Class 4 National Insurance.

0300 200 3500

Outside UK:
+44 191 203 7010

Opening times:

Monday to Friday: 8am to 6pm

Closed on Saturdays, Sundays and bank holidays.

You can also find out information in:

You can use NGT text relay if you cannot hear or speak on the phone: dial 18001 then 0300 200 3100.

Find out about call charges