National Insurance: general enquiries


Ask HMRC online

Ask HMRC’s digital assistant to find information about:

  • checking your contributions
  • getting your employment history

Find a lost National Insurance number

Get your National Insurance number online, find out where else you can find it, or request it to be sent to you by post.

Apply for a National Insurance number

Check if you can apply for a National Insurance number online if you have never had one.

Check your National Insurance record

Check for gaps in your National Insurance contributions.

Check your State Pension

Find out how much State Pension you could get, when you can get it and if you can increase it.

Tell HMRC if you’ve changed name or address

Tell HMRC if you’ve stopped being self-employed

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


You can call for help and information about:

  • Class 1, 2 and 3 National Insurance rates and thresholds
  • registering for National Insurance, Income Tax and VAT if you’ve recently become self employed
  • statutory payments
  • reduced rate National Insurance for married women
  • National Insurance statement requests
  • employment histories
  • National Insurance credits if you’re a parent or carer
  • gaps in your National Insurance contributions
  • if you should pay National Insurance abroad
  • certificates for healthcare abroad
  • your National Insurance number

You will not be given your National Insurance number over the phone. It will be posted to you and can take up to 15 days to arrive.

The quickest way to get your National Insurance number is through your personal tax account.

If your question is about Class 4 National Insurance, contact Income Tax: general enquiries.

If you’re calling about a possible National Insurance number scam, report the suspicious phone call, email or text to HMRC.

Before you call

Before you call, check if you can can find the information you need in the official HMRC app.

If you have contacted us already, check when you can expect a reply.

Be ready to give us your National Insurance number if you have one.

If you have a personal tax account, make sure your details are up to date or you could fail telephone security. If you do not have a personal tax account, check if you can create one.

This helpline uses speech recognition software. If you cannot use speech recognition software, or you need extra support, find out how to deal with HMRC if you have additional needs.

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

We may ask if you want to add voice identification to your account. You can find out more in the Voice Identification Privacy Notice.

0300 200 3500

0300 200 3519

Outside UK:
+ 44 191 203 7010

Opening times:

Our phone line opening hours are:

Monday to Friday: 8am to 6pm

Closed on Saturdays, Sundays and Bank Holidays.

Find out about call charges


Write to HMRC at this address with all National Insurance queries except complaints.

You do not need to include a street name, city name or PO box when writing to this address.

Couriers should use a different address.

PT Operations North East England
HM Revenue and Customs
United Kingdom