NINO Generator (UK)

Generate valid National Insurance Number (NINO) codes for testing purposes. Follows the official UK format: 2 letters, 6 digits, 1 letter.

international.disclaimer

This tool generates fictitious data intended exclusively for software testing and development purposes. The data does not correspond to real people or entities and must not be used for illegal, fraudulent purposes, or in ways that violate the privacy of others. Compliant with LGPD (Brazilian Data Protection Law).

See also:

Color Picker
AIH Validator
CNS Generator
Steuer-ID (Germany)
Testing Best Practices
Codice Fiscale Validator (Italy)
EIN (USA)
Base64 Encode/Decode

About NI Number (United Kingdom)

What is the NI Number?

The National Insurance Number is the UK's tax and social security identifier, issued by HMRC. Format: AA-XX-XX-XX-C (2 letters, 6 digits, 1 letter), used for social security contributions and taxes.

Formation rules

The first two letters cannot be BG, GB, NK, KN, TN, NT, ZZ and cannot start with D, F, I, Q, U, V. The suffix (last letter) is A, B, C, or D. The generator respects all these restrictions.

Use in development

International HR systems, British payroll platforms, and fiscal compliance applications in the UK require the NI Number. Use fictitious numbers to test forms and integrations.