National Insurance: enquiries
Source: gov.uk (2025-06-03)

Contact HMRC for changes of details, rates, credits, Statutory Payments, online statements and for help with gaps in your National Insurance contributions.

Online

Ask HMRC’s digital assistant (https://www.tax.service.gov.uk/ask-hmrc/chat/national-insurance) to find information about:
- checking your contributions
- getting your employment history
If the digital assistant cannot help you, you can ask to transfer to an HMRC adviser if they’re available.

Find your lost National Insurance number (https://www.gov.uk/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 (https://www.gov.uk/apply-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 (https://www.gov.uk/check-national-insurance-record) Find out:
- if you’ll benefit from paying voluntary contributions (https://www.gov.uk/voluntary-national-insurance-contributions) to fill any gaps in your National Insurance record
- how your State Pension forecast will change if you decide to pay voluntary contributions
- if you can pay voluntary contributions online and how much this will cost
Check your State Pension forecast (https://www.gov.uk/check-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 (https://www.gov.uk/tell-hmrc-change-of-details)

Tell HMRC if you’ve stopped being self-employed (https://www.gov.uk/stop-being-self-employed)

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

You can also find out information in:
- the official HMRC app (https://www.gov.uk/guidance/download-the-hmrc-app)
- your personal tax account (https://www.gov.uk/personal-tax-account) or business tax account (https://www.gov.uk/guidance/sign-in-to-your-hmrc-business-tax-account)
Phone

Confirming your National Insurance number

You can quickly get confirmation of your National Insurance number in your personal tax account (https://www.gov.uk/personal-tax-account) or on the HMRC app (https://www.gov.uk/guidance/download-the-hmrc-app).

You will not be given your National Insurance number over the phone. It will be posted to you and can take up to 10 working days to arrive.

Class 1, 2 and 3 National Insurance enquiries

Call HMRC for help and information with:
- 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
- refunds for National Insurance contributions
- if you should pay National Insurance abroad — including certificate of coverage (also known as a PDA1 or A1) queries
- certificates for healthcare abroad
- your National Insurance number
If you’re calling about a possible National Insurance number scam, report the suspicious phone call, email or text to HMRC (https://www.gov.uk/guidance/identify-hmrc-related-scam-phone-calls-emails-and-text-messages).

You can use Relay UK if you cannot hear or speak on the phone, dial 18001 then xx-xxxx-xxxx. Find out more on the Relay UK website (https://www.relayuk.bt.com/).

Telephone: xx-xxxx-xxxx

Textphone: xx-xxxx-xxxx

Outside UK: xx-xxxx-xxxx

Opening times: Monday to Friday, 8am to 6pm. Closed bank holidays (https://www.gov.uk/bank-holidays).

Class 4 National Insurance enquiries

Call HMRC for help with Class 4 National Insurance queries.

You can use Relay UK if you cannot hear or speak on the phone, dial 18001 then xx-xxxx-xxxx. Find out more on the Relay UK website (https://www.relayuk.bt.com/).

Telephone: xx-xxxx-xxxx

Opening times: Monday to Friday, 8am to 6pm. Closed bank holidays (https://www.gov.uk/bank-holidays).

Before you call

Before you call, check if you can can find the information you need in the official HMRC app (https://www.gov.uk/guidance/download-the-hmrc-app).

If you have contacted us already, check when you can expect a reply (https://www.gov.uk/guidance/check-when-you-can-expect-a-reply-from-hmrc).

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

If you have a personal tax account (https://www.gov.uk/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.

These helplines uses speech recognition software. If you cannot use speech recognition software or need other help, find out how to get help from HMRC if you need extra support (https://www.gov.uk/dealing-hmrc-additional-needs/overview).

We may ask if you want to add voice identification to your account. You can find out more in the Voice Identification Privacy Notice (https://www.gov.uk/government/publications/voice-identification-privacy-notice).

Find out about call charges (https://www.gov.uk/call-charges)

Post

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

There is a different way to:
- make a complaint about HMRC (https://www.gov.uk/government/organisations/hm-revenue-customs/contact/complain-about-hmrc)
- report tax fraud (https://www.gov.uk/report-tax-fraud)
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 (https://www.gov.uk/government/organisations/hm-revenue-customs/contact/couriers).

PT Operations North East EnglandHM Revenue and CustomsBX9 1ANUnited Kingdom

Related content

Guidance
- National Insurance: introduction (https://www.gov.uk/national-insurance)
- National Insurance if you work abroad (https://www.gov.uk/national-insurance-if-you-go-abroad)
- Contact the Future Pension Centre (https://www.gov.uk/future-pension-centre)
HMRC contacts
- Treth Incwm, Hunanasesiad a mwy (https://www.gov.uk/government/organisations/hm-revenue-customs/contact/welsh-language-helplines)