Read the headlines on the London UHNWI exodus, then read the numbers underneath. The two stories do not quite match. Henley and Partners forecasts a net outflow of 16,500 millionaires from the UK in 2025, the largest single-country outflow ever recorded since Henley and New World Wealth began tracking the data in 2013 (Henley and Partners, 2025). The figure is significant. It is also smaller than the public discourse suggests. First, 16,500 represents roughly 2.7 percent of the total UK millionaire population. Large, not catastrophic. Second, the underlying behaviour is rarely a clean exit. Most principals leaving structure their relocation as a partial restructuring rather than a clean break with the UK.

Two specific policy shifts drove the acceleration. The closure of the Tier 1 Investor Visa in February 2022 removed a primary entry route for inbound HNWIs (UK Home Office, 2022). The Autumn Budget of October 2024, under Chancellor Rachel Reeves, abolished the non-dom remittance basis with effect from 6 April 2025 and replaced it with a four-year Foreign Income and Gains regime available only to those non-UK resident for the previous ten tax years (HM Treasury, 2024). Inheritance tax was simultaneously moved from a domicile-based to a residence-based test, with worldwide assets within scope after ten years of UK residence and a ten-year tail after departure (KPMG, 2025). For long-resident non-doms whose families had been UK-based for decades, the reforms triggered an immediate fiscal repricing, and the rational response, for those with mobility, was to relocate.

Destination mapping is more fragmented than the standard narrative captures. Henley client data identifies the top relocation destinations for UK nationals in 2025 as the UAE, the United States, Italy, and Switzerland (Henley and Partners, 2025). Dubai has captured perhaps the largest share, with the UAE forecast for a net inflow of 9,800 millionaires in 2025, the highest global net inflow on record. Italian relocation has been disproportionately favoured by mid-career UHNWIs valuing Mediterranean lifestyle alongside fiscal certainty under the 200,000 euro flat-tax regime, rising to 300,000 euros from January 2026. Switzerland has recovered some traditional flows of principals priorising privacy and proximity to European business networks. Monaco retains its position for established family wealth but is no longer the default it was in 2010.

Roughly a quarter of departing UK millionaires disperses across smaller jurisdictions. Cyprus. Malta. Greece. Madeira. The Caribbean. Increasingly Latin America for principals seeking maximum optionality. This fragmentation is itself a fact about the new mobility geography. Where a generation ago a UHNWI’s relocation choice was usually binary (London or Switzerland, London or Monaco), today the choice is portfolio-based, with principals constructing residency optionality across three or four jurisdictions simultaneously.

The partial-exit pattern is the more interesting dimension. Many principals leaving London have not relocated their entire family. The standard structure runs: principal restructures personal tax residency to one of the lower-tax jurisdictions, often via the 90-day rule, while the family retains a UK base. The London property is held but the time spent in it is reduced below the threshold of UK tax residence under the Statutory Residence Test. Children stay in UK schools or universities. Business interests retain UK exposure. The result is measurable but moderate softening at the top end of London property, not the collapse the more dramatic predictions suggested. Ultra-prime properties take longer to liquidate. The depth of the buyer pool is shallower. But price level holds for properties that do trade.

Caroline Knowles, in her ethnography of London’s super-rich, observed before these reforms took effect how London’s plutocratic infrastructure had become globalised. Principals were already operating across multiple jurisdictions, with London as one node rather than the centre (Knowles, 2022). The non-dom reforms accelerated a trend that was already real. McKenzie and Atkinson’s work on the anchoring of international wealth chains in London documented the same dynamic from a different angle: wealth had become decoupled from any single jurisdiction, with London functioning as a node in a multi-jurisdictional architecture (McKenzie and Atkinson, 2020).

For brokerages and advisors in the London-to-elsewhere corridor, the implication is direct. The principals leaving have not severed their London exposure. They have demoted it. Advisors continuing to serve them are those operating across the principal’s full footprint, not just the legacy London base. Advisors stuck within UK borders are losing relationship share, even when the principal still owns London property. Atkinson, Burrows, and Rhodes documented the segmentation of London’s top property market between dynastic capital with permanent occupancy logic and mobile wealth with portfolio logic (Atkinson, Burrows, and Rhodes, 2016). The non-dom reforms accelerated the migration of the mobile-wealth segment out of full UK tax exposure. They did not eliminate the segment’s connection to London real estate.

Q1 2025 data captures the urgency. Henley reports a 183 percent year-on-year increase in UK applications for alternative residence and citizenship programmes (Henley and Partners, 2025). St. James’s Place, the FTSE-listed wealth manager, reported a 204 percent rise in non-UK website enquiries related to tax planning, succession structuring, and regulatory implications across the same period (St. James’s Place, 2025). These are not retirees or lifestyle migrants. They are operating principals restructuring under fiscal pressure, with their advisors helping them build the alternative architecture.

There is a quieter story underneath the headlines. UK domestic millionaire creation continues. UK wealth managers report new domestic clients at rates comparable to pre-reform years. The total UK millionaire population is not collapsing. What is happening is that the top of the stack, the principals with the most mobility and the most exposure to the non-dom regime, is rotating out of UK fiscal residence while retaining substantial UK economic exposure. The mid-tier UK millionaire base, often resident throughout careers and without comparable mobility, remains.

For European advisory firms positioning to serve relocating UK principals, the opportunity is precisely the partial-exit pattern. The relocating principal does not want a single replacement for London. The principal wants a coordinated multi-jurisdictional advisory relationship: Dubai or Italy or Switzerland for tax residence; London for legacy assets and family continuity; Mediterranean for summer; potentially Miami or New York for North American business exposure. Advisory firms able to deliver across that footprint, with documented economics and shared client management, are winning the relationships. Firms in a single jurisdiction are not.

The lesson for wealth advisors is to stop tracking the UK exit as a binary event. The new normal is multi-jurisdictional residence with London demoted from primary base to one of several.

References

• Atkinson, R., Burrows, R., and Rhodes, D. (2016) ’Capital City? London’s Housing Markets and the Super-Rich’, in I. Hay and J.V. Beaverstock (eds.) Handbook on Wealth and the Super-Rich. Cheltenham: Edward Elgar Publishing, pp. 225-243.

• Hay, I. and Beaverstock, J.V. (eds.) (2016) Handbook on Wealth and the Super-Rich. Cheltenham: Edward Elgar Publishing. ISBN 978-1-78347-403-5.

• Henley and Partners (2025) Henley Private Wealth Migration Report 2025. London: Henley and Partners and New World Wealth, June 2025.

• HM Treasury (2024) Autumn Budget 2024: Non-Domiciled Individuals: Reform Policy Document. London: HM Treasury, 30 October 2024.

• KPMG UK (2025) ’Inheritance Tax Changes from 6 April 2025: An Update.’ London: KPMG, August 2025.

• Knowles, C. (2022) Serious Money: Walking Plutocratic London. London: Allen Lane (Penguin).

• McKenzie, R. and Atkinson, R. (2020) ’Anchoring capital in place: The grounded impact of international wealth chains on housing markets in London’, Urban Studies, 57(1), pp. 21-38.

• Paris, C. (2016) ’The Residential Spaces of the Super-Rich’, in I. Hay and J.V. Beaverstock (eds.) Handbook on Wealth and the Super-Rich. Cheltenham: Edward Elgar Publishing, Chapter 12, pp. 244-263.

• St. James’s Place (2025) Quarterly Trading Update Q1 2025. London: St. James’s Place plc, April 2025.

• UK Home Office (2022) Tier 1 (Investor) Visa Route: Closure Statement, 17 February 2022. London: Home Office.