Class 2 and Class 3 NIC reference checker

When making a Class 2 or Class 3 National Insurance contributions payment you’ll need your reference number, which is shown on the payslip HMRC sends you.

The reference number is 18 characters long, for example:

Class 2 – 110036202016230614 (first two characters are always ‘11’ and the final character can be an ‘ X’
Class 3 quarterly payments – 112345678936985214 (first two characters are always ‘11’ and the final character can be an ‘X’
Class 3 deficiency payments – 602345678974125890 (first two characters are always ‘60’ and the final character can be an ‘X’

To check that your reference number is correct, please enter it below then click on the ‘Check reference’ button. Press 'Clear' to clear the number and start again.

Reference number

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