How long does ni number take after mailing back

The processing time for a National Insurance number (NI number) application can vary depending on several factors, including the complexity of the application, the workload of the HM Revenue & Customs (HMRC) office, and the method of application.

If you apply for a National Insurance number by post, it usually takes around 6-8 weeks to receive your NI number after mailing back the application form. However, it can take longer in some cases, such as:

  1. Complex applications: If your application is complex or requires additional information, it may take longer to process.
  2. High volume of applications: During peak periods, HMRC may take longer to process applications due to a high volume of requests.
  3. Postal delays: Delays in the postal service can also affect the processing time.

Here's a general outline of what you can expect:

If you haven't received your NI number after 8 weeks, you can contact HMRC to check the status of your application. You can do this by:

  1. Calling the HMRC National Insurance number helpline: 0300 200 3500 (Monday to Friday, 8am to 6pm).
  2. Visiting the HMRC website and using the online chat service.
  3. Writing to HMRC at the following address: HMRC National Insurance Number Helpline PO Box 219 Newport NP10 9AF

Remember to quote your application reference number and provide any additional information requested by HMRC to help them locate your application.