Question to the HM Treasury:

To ask the Chancellor of the Exchequer, how many (a) men and (b) women paid Class Four National Insurance contributions in each of the last five years.

HMRC does not routinely publish estimates of the number of Class 2 or Class 4 National Insurance payees in total or any of the subsets asked for in the series of questions.

HMRC only publishes total National Insurance Contributions receipts across all classes and the OBR only publishes Class 2 and Class 4 National Insurance Contribution receipts combined together for projections years and one year of outturn.

To produce a set of reliable estimates of all the different data requested would only be possible at disproportionate cost.