The number of wealthy non-domiciled taxpayers in the United Kingdom declined by approximately 1,200 in the financial year ending April 2025, according to new data from HM Revenue & Customs (HMRC). This drop reflects a broader trend of affluent individuals leaving the UK or altering their tax residency status amid ongoing tax policy changes.

HMRC figures indicate that around 9,000 non-doms either left the UK or changed their tax status during this period. Meanwhile, new arrivals claiming non-dom status fell by 14 percent to 8,600. Additionally, about 800 "deemed-domicile" taxpayers—those who previously held non-dom status but have since become fully liable for UK taxation—also exited the country, contributing to the overall net reduction.

Despite the decrease in non-dom taxpayers, the total tax revenue generated from this group rose by £1 billion compared to the previous year. Income tax receipts increased by £556 million, a 6 percent gain that brought collections to their highest level since 2017. Capital gains tax paid by this cohort also surged by 58 percent, reaching £460 million.

Industry observers have voiced concerns that the continued tightening of non-dom tax regulations could accelerate the departure of wealthy individuals from the UK. Leslie MacLeod-Miller, chief executive of Foreign Investors for Britain, warned that the nation risks losing more internationally mobile wealth if the government does not implement a more competitive tax framework. He noted that non-doms currently contribute approximately £13.6 billion annually to the public treasury, emphasizing the fiscal importance of retaining this group.

Over recent years, successive governments have introduced stricter rules governing non-dom status. The Conservative government under Prime Minister Rishi Sunak made it more difficult to qualify for non-dom status, while Labour’s former chancellor, Rachel Reeves, eliminated the status entirely. Labour’s current Foreign Income and Gains system permits new arrivals to avoid UK taxation on foreign income for the first four years of residence; after this period, individuals become liable for UK taxes on their worldwide income and gains.

These policy shifts reflect an effort to broaden the UK tax base yet have raised concerns among supporters of non-dom arrangements who argue that overly stringent measures could deter investment and entrepreneurship. The evolving landscape suggests an ongoing balancing act between tax fairness, revenue generation, and maintaining the UK's attractiveness to high-net-worth individuals.