Question to the HM Treasury:

To ask His Majesty's Government what estimate they have made of the number of high net worth individuals who have left the UK since the Autumn Budget 2024.

Taxpayers are not always required to inform HM Revenue and Customs when they leave the UK. Some taxpayers outside of Self Assessment might file a P85 form after leaving the UK, but only where they are seeking to claim a repayment of income tax.

Taxpayers in Self Assessment can indicate that they have become non-resident after leaving the UK, but tax returns for the 2024 to 2025 and the 2025 to 2026 tax years are not due to be received by HMRC until 31 January of 2026 and 2027 respectively.

HMRC does not produce statistics on high-net-worth individuals, but does, however, produce statistics on a subset of these individuals in the Non-domiciled taxpayers in the UK statistical release.[1]

[1] The latest release of the Non-domiciled taxpayers in the UK statistics can be found here for the 2022/23 tax year: https://www.gov.uk/government/statistics/statistics-on-non-domiciled-taxpayers-in-the-uk/statistical-commentary-on-non-domiciled-taxpayers-in-the-uk--2