This statistic illustrates the number of millionaire (HNWI, UHNWI) and billionaire individuals in the United Kingdom (UK) in selected years from 2013 to 2018 and a forecast for 2023, by wealth bracket. The high, ultra-high and billionaire's population grew steadily throughout time, with projection to increase approximately 19 percent, 21 percent and 24 percent respectively by 2023 in comparison to 2018.

In 2017, the number of individuals living in the United Kingdom (UK) with a net worth of over 30 million U.S. dollars excluding the value of their primary residence was almost 17,700 people. This number is expected to grow to over 26,000 by 2027.

Ultra-high net worth individuals (UHNWI) are typically defined as individuals who have a net worth of more than 30 million U.S. dollars. In 2022, the total value of the art and collectible wealth of UHNWI worldwide amounted to approximately 2.17 trillion U.S. dollars. That year, North America accounted for the highest share of the market, with around 873 billion U.S. dollars in UNHWI art and collectible wealth. This figure was forecast to reach an estimated 1.1 trillion U.S. dollars in 2026. The global auction market An important segment of the global art market, auctions are among the most common ways to acquire valuable artworks, antiques, and collectibles. In 2022, the sales value at public auctions of art and antiques worldwide reached nearly 27 billion U.S. dollars. When breaking down global public auction sales by country, the United States, China, and the United Kingdom emerged as the leading markets in 2022, generating together more than 75 percent of public auction sales worldwide. What are the biggest auction houses in the world? Christie's and Sotheby's, two auction houses founded in the UK in the 1700s, currently dominate the market, ranking as the auction houses with the highest sales value worldwide in 2022. That year, Heritage Auctions and Phillips, another auction house originally founded in the UK in the 18th century, followed in the ranking. In 2022, global sales of Phillips totaled 1.3 billion U.S. dollars, the highest figure reported by the company to date.

In 2023, 225,000 individuals with net assets of at least 30 million U.S. dollars were residing in the United States, by far the highest number of any country. By comparison, China, which had the second highest number of ultra high net worth individuals (UHNWIs), had less than 100,000 individuals with assets amounting to 30 million U.S. dollars or more.Place of residence of ultra high net worth individuals The residency of almost half of the world’s ultra high net worth individuals in the United States explains the dominance of North America in regard to the number of ultra high net worth individuals by region. Hong Kong was the city with the most UHNWIs in 2022, followed by New York, London, and Los Angeles. Source of wealth and gender differences A majority of the world's UHNWIs are self-made. However, looking at billionaires, there is a clear difference between men and women; whereas a majority of billionaire men were self-made, a majority of the women had inherited their fortune.

In 2023, Germany had the highest collective wealth of ultra high net worth individuals in Europe, at over 2,624 billion U.S dollars, followed by United Kingdom (UK) at 1,592 billion dollars.

The share of female ultra high net worth (UHNW) individuals increased over the past years. As of 2022, 11 percent of all ultra wealthy individuals worldwide were women. By comparison, the share was 6.5 percent in 2016.