Question to the HM Treasury:

To ask the Chancellor of the Exchequer, what estimate she has made of the costs to HMRC of processing changes to rates of National Insurance contributions.

Tax Information and Impact Notes (TIINs) covering recent changes to rates of National Insurance contributions (NICs) are available on GOV.UK and include information about estimated costs associated with these measures.

A TIIN covering employer NICs changes announced at Autumn Budget was published by HMRC on 13 November. These changes included a change in the rate of employers’ National Insurance. The TIIN confirmed that HMRC would need to make IT changes to implement this package of measures, and that the total cost of changes required was estimated to be circa £900,000.