On certain documents – You can usually find your National Insurance number on your payslips or P60, or on any other letters about tax, pensions or benefits from HMRC. Online – If you have a ...

But did you know that two digits in your National Insurance number indicate ... Hidden within your NI number's sequence of numbers and letters are two digits that reveal the day of the week ...

Your NI number consists of two letters, six numbers and a final letter, and remains the same throughout your life. Everyone who wants to work in the UK must have a National Insurance number.