A social insurance number (SIN) is a number to administer various government programs issued in Canada What is the serial number on a national insurance card. The number could serve as an. Mean your NI number itself? NI numbers have no serial number associated with them - they are a serial number in isolation.
Most employees have category letter A. Employees can find their category letter on their payslip.
Category letter Employee group A All employees apart from those in groups B, C, J, H, M and Z in this table B Married women and widows entitled to pay reduced National Insurance C Employees over the J Employees who can defer National Insurance because they’re already paying it in another job H Apprentice under 25 M Employees under 21 Z Employees under 21 who can defer National Insurance because they’re already paying it in another job Category letter X Employers use category letter X for employees who don’t have to pay National Insurance, for example because they’re under 16. Mariners and deep sea fishermen HMRC has detailed information on.
