HM Revenue and Customs
When calling HM Revenue and Customs for National Insurance queries, you can address questions about your National Insurance number, contributions, credits, and records. The service is available Monday to Friday, from 08:00 to 18:00. Common reasons for calling include correcting records or challenging credit decisions. Be prepared for potential long wait times, especially during peak hours and tax season. It's advisable to call early in the morning or outside peak periods to avoid delays. Ensure you have your National Insurance number and personal details ready, as these are often required for verification.
Updated 15 Dec 2025
Expected outcomes
- Answer National Insurance questions
- Correct National Insurance records
- Challenge credit decisions
- Provide contribution details
- Verify National Insurance number
Call preparation
Assemble everything before you dial. These requirements are verified by our call analysts and updated as organizations change their scripts.
- National Insurance number
- Personal identification details
- Payslips
- P60
- Proof of postage
- Supporting documents
Known issues
Callers frequently experience long wait times, particularly during peak hours and tax season. To minimize delays, try calling early in the morning or outside peak periods. For complex cases, such as correcting National Insurance records or challenging credits, multiple calls or written correspondence may be necessary. It's important to keep records of all communications and send written evidence when requested. If you encounter difficulties, ensure you have all necessary documents ready and consider following up with written correspondence to expedite resolution.
