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Register your household

National Insurance Number Checker

National Insurance Check

To begin, please enter the National Insurance number of the primary applicant, and if applicable, the joint applicant.

We use your NI number to prevent duplicate applications being created. If you do not know your NI number, you can obtain it via the .gov website www.gov.uk/lost-national-insurance-number or by calling 0300 200 3500 for assistance.