National Insurance: general enquiries

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Online forms

Your message using these forms is secure. If HMRC reply by email the information is not secure. If they need to contact you about anything confidential, they will reply by post or telephone.

Phone

National Insurance enquiries

  • Telephone: 0300 200 3500
  • Textphone: 0300 200 3519
  • Outside UK: + 44 191 203 7010

Call for help and information about:

  • Class 1 National Insurance rates and thresholds
  • Statutory Payments
  • Married Women’s Reduced Rate Election
  • National Insurance statement requests
  • Class 3 National Insurance

If you have a National Insurance number, have it with you when you call.

HMRC cannot give you an estimate of your State Pension but you can get a State Pension statement.

Find out about call charges

Opening times:

8am to 5pm, Monday to Friday

Closed weekends and bank holidays

Best time to call:

Phone lines are less busy after 1pm

National Insurance numbers

  • Telephone: 0300 200 3502
  • Textphone: 0300 200 3519

Call to get advice if:

  • you’re between 15 years and 9 months and 20 years old and haven’t received a National Insurance number
  • you’ve lost or can’t remember your National Insurance number
  • you need a letter confirming your National Insurance number

HMRC cannot confirm National Insurance numbers over the phone.

If you’ve lost or forgotten your National Insurance number you can also complete form CA5403 to get written confirmation of your number.

Apply for a National Insurance number if you’re over 20 years old and haven’t got one.

Find out about call charges

Opening times:

8.30am to 5pm, Monday to Friday

Closed weekends and bank holidays

Best time to call:

Phone lines are less busy after 1pm

Post

Write to HMRC with your National Insurance correspondence.

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.

National Insurance Contributions and Employer Office

HM Revenue and Customs BX9 1AN United Kingdom

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Don’t include personal or financial information, eg your National Insurance number or credit card details.