Question to the HM Treasury:

To ask the Chancellor of the Exchequer, how many enquiries have been conducted on the tax returns of self-assessment taxpayers excluding trusts, partnerships, charities in each financial year since 2008-09.

It is not possible to answer the question without incurring disproportionate costs in the time available. HMRC’s central reporting system does not hold the specific data required and therefore HMRC is unable to answer the question.

In 2018-19, HMRC generated £34.1 billion in compliance yield against its target of £30 billion. The number of compliance cases concluded in each of the last three years are shown in the table below (rounded to the nearest 5K):