NIM39130 | National Insurance Numbers (NINOs): Format and Security: Not entitled to a NINO
From HM Revenue & Customs · National Insurance Manual
Not everyone who wants a NINo will get one. Some people do not fall into the category of needing a NINo, including:
people over pension age who are neither:
working, nor
claiming benefit, credits or tax credits, or need one for other HMRC/DWP purposes
children under age 16.
For reasons why people need a NINO, see NIM39125.
For legislation see NIM39330.
Further information on the NINo Application process can be found at https://www.gov.uk/government/publications/national-insurance-number-allocations-staff-guide
(This content has been withheld because of exemptions in the Freedom of Information Act 2000)