Why Is Hong Kong Still the World’s No. 2 Billionaire City?

Hong Kong had two fewer billionaires at the end of 2025 than a year earlier, according to Altrata's Billionaire Census 2026, released this week — 106, down from 108, though their combined wealth rose 4% to $319 billion. It still ranked second globally, behind only New York's 164. The interesting question isn't the ranking itself, which Hong Kong has held for years. It's what is actually filling that spot given the headcount is shrinking.

The short answer, according to separate data and multiple analysts, is that Hong Kong isn't creating billionaires so much as importing wealth that already exists. The city's advantages for that job are structural and long-standing: a common-law legal system, no capital-gains or estate tax, free movement of capital, and a currency pegged to the US dollar, layered on top of geographic and political proximity to mainland China's wealthiest families. "The city's long-term sweet spots — a safe and steady investment environment, access to global markets and abundant investment options — appear more valuable to global investors at a time of geopolitical tension," Liu Yang, associate professor of finance at the University of Hong Kong Business School, told Xinhua, describing what is luring Asian high-net-worth clients to move money back into the city.

That inflow shows up most clearly in a different metric than the billionaire count. Boston Consulting Group's 2026 Global Wealth Report found Hong Kong overtook Switzerland last year to become the world's largest cross-border wealth hub, with offshore assets booked in the city rising 10.7% to $2.9 trillion — 59% of it originating from mainland China. BCG expects that gap with Switzerland to widen to nearly $600 billion by 2030. Anthony Lau, Deloitte China's Hong Kong tax and business advisory leader, told Xinhua that overseas clients who set up family offices in the city tend to go on to expand their broader family businesses there too — evidence the inflow is not just parked cash but increasingly rooted activity. More than 3,380 single-family offices now operate in Hong Kong, up more than 25% over two years, according to local data cited in the same report.

Set against that backdrop, Altrata's own numbers make more sense. Its separate World Ultra Wealth Report 2026, published in June, found Hong Kong's population of people worth $30 million or more — a much wider band than the billionaire threshold — grew 26.4% in 2025 to 18,290, the fastest rate of any of the world's 12 largest wealth cities, with combined wealth of $2.1 trillion. Altrata attributed the jump directly to "a recent resurgence in cross-border wealth inflows" tied to "deepening integration with mainland Chinese capital flows." No outlet appears to have read that alongside this week's billionaire figures, but the pattern lines up: the very top of Hong Kong's wealth pyramid is thinning even as the layer just beneath it — freshly arrived capital that hasn't yet compounded into ten-figure fortunes, or belongs to families who prefer to stay under the billionaire spotlight — expands rapidly. More than 60% of Hong Kong's billionaires were born overseas, per a Hong Kong media report carried by China News Service, a figure IBTimes could not independently verify beyond that single account but which fits the same import-driven picture.

That model now faces its first real test. In late July, Beijing announced that offshore trusts would become subject to mainland personal income tax, closing a loophole wealthy Chinese families had used for years to shield assets routed through Hong Kong structures, the South China Morning Post reported. Assets held in Hong Kong trusts reached $667 billion in 2023, with 55% of the underlying investments in mainland China and Hong Kong itself, according to KPMG and the Hong Kong Trustees' Association. Whether the new rules divert that flow or simply formalize it, analysts told the Post, will shape whether Hong Kong's wealth-import machine keeps running at the same pace.

For now, the ranking Altrata published this week is less a story about billionaires being made in Hong Kong than about where money made elsewhere ends up. The city's legal, tax and market infrastructure was built over decades specifically to be a landing pad for outside wealth — and on that measure, a shrinking billionaire count sitting atop a swelling base of new arrivals is not a contradiction. It's the system working as designed.