The US Minted 441,000 New Millionaires Last Year. Now Comes the Tax Planning

The United States added more than 440,000 new dollar millionaires in 2025, more than any other country and roughly 1,200 a day, according to UBS's Global Wealth Report 2026, published June 30, 2026. Global personal wealth rose 10.8% in dollar terms during 2025, its strongest showing in years, with the US alone accounting for close to half of the world's newly created millionaires.

What changed

UBS counted 23.6 million dollar millionaires in the US at the end of 2025, out of roughly 60 million worldwide, cementing the country's position as home to well over a third of the global total. The report ties the surge to strong financial markets and rising home and business values rather than to income growth alone, meaning many of these new millionaires reached the threshold through asset appreciation - a portfolio, a house, a business stake - rather than through wages. Worldwide, the millionaire population grew 1.5% in 2025, or nearly one million people, according to Yahoo Finance's summary of the findings.

Who is affected

Crossing the seven-figure net worth mark for the first time often means crossing into tax exposure a household has never had to plan around. Someone who becomes a millionaire mainly because a home or a concentrated stock position appreciated has an unrealized gain that did not exist a few years earlier, and a net worth that, combined with a spouse's, can approach the range where estate planning stops being optional. The 2026 federal estate and gift tax exemption of $15 million per person, or $30 million for a married couple, still exempts most of this group from federal estate tax on its own, but state estate taxes in roughly a dozen states kick in at far lower thresholds, in some cases starting around $1 million to $2 million.

The after-tax math

Example: a household's net worth crosses $1.5 million for the first time in 2025, driven mostly by a home that appreciated from $500,000 to $900,000 and a retirement and brokerage portfolio that grew alongside the broader market UBS describes. None of that unrealized gain is taxed yet. But if the household lives in a state with its own estate tax and a $2 million exemption, and net worth keeps compounding at a similar pace, a couple could find their combined estate approaching that state threshold within a few years - a very different planning conversation than the one they were having when their net worth was under $1 million.

Moves to discuss with your advisor

• Check state estate tax exposure. Households newly over $1 million to $2 million in net worth in a state with its own estate or inheritance tax may be closer to a taxable threshold than the large federal exemption suggests.
• Track cost basis on appreciated assets. A home or investment that has driven much of a household's new wealth carries an embedded gain that matters at sale or, absent planning, at death.
• Revisit beneficiary designations and titling. Newly affluent households sometimes never updated these from when their assets were far smaller.

What to watch

UBS's report describes 2025 as an unusually strong year for wealth creation, driven by markets that may not repeat their pace in 2026. Households that crossed into millionaire status on the back of asset appreciation, rather than savings, should treat the milestone as a prompt to build a plan sized to their new balance sheet rather than as evidence that the hard part is over.

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