Get your National Insurance number
Get your National Insurance number by:
- registering and logging into your personal tax account to view a letter with it on
- filling in the online form and posting it to us, if you’re unable to register for a personal tax account
You can also find your National Insurance number on your payslip, P60, tax returns or official letters about tax, pensions or benefits.
Check your National Insurance record
Use this service to see any gaps in your National Insurance contributions.
Check your State Pension
Use this service to find out:
- how much State Pension you could get
- when you can get it
- if you can increase it
- how you can increase it
Tell HMRC you've changed name or address
If HMRC needs to contact you about anything confidential they’ll reply by phone or post.
Call this number if you have not received your National Insurance number or have lost or forgotten it.
You can also call for help and information about:
- Class 1 National Insurance rates and thresholds
- Class 2 and 3 National Insurance
- Statutory Payments
- Married Women’s Reduced Rate Election
- National Insurance statement requests
- employment histories
- Parents and Carers credits
- gaps in your National Insurance contributions
Have your National Insurance number with you, if you have one.
Contact Income Tax: general enquiries if you have a question about Class 4 National Insurance.
When you call
This helpline uses speech recognition software, so you will be asked why you are calling HMRC. Try to answer with short phrases and words, for example:
- ‘change my address’
- ‘question about National Insurance payments’
- ‘find out National Insurance rates’
If you cannot use speech recognition software, find out how to deal with HMRC if you have additional needs.
Our phone line opening hours are:
Monday to Friday: 8am to 6pm
Closed on Saturdays, Sundays and Bank Holidays.
If your call is not urgent, you can find out information in:
HMRC may ask if you want to add voice identification to your account. You can find out more in the Voice Identification Privacy Notice.
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.