Question to the HM Treasury:

To ask the Chancellor of the Exchequer, whether she has made an estimate of the value of increased national insurance contributions from public sector organisations included within the StatsWales definition of public sector but omitted from the definition used by the Office of National Statistics.

The Treasury routinely uses the Office for National Statistics (ONS) classification of the public sector boundary, for example in relation to public sector spending, public sector borrowing and public sector debt.

The latest forecasts for tax revenues were published alongside the Office for Budget Responsibility’s (OBR) October Economic and Fiscal Outlook. These forecasts are based on economic determinants, including wage growth and employment levels. Detailed tax receipts forecasts can be found here: Economic and fiscal outlook – October 2024 - Office for Budget Responsibility.

A Tax Information and Impact Note that covers the employer NICs changes was published by HMRC on 13 November.