Switzerland collects a centuries-old wealth tax while maintaining its status as a global financial hub because its rates remain modest enough to prevent capital flight, according to a recent Washington Post op-ed by Warren Gorlick, a retired policy adviser at the Treasury Department.
Switzerland Taxes Wealth Without Driving Away Billionaires
Switzerland ranks as the fourth wealthiest country globally on a per-capita GDP basis at $126,177, trailing only Liechtenstein, Luxembourg, and Ireland, according to data cited by Gorlick. Despite its cantons levying wealth taxes for more than a century, the jurisdiction continues to attract international fortunes. Gorlick noted that the number of adults possessing between $5 million and $10 million in assets expanded at an annual rate of 7.4% from 2000 to 2025.
Cantonal rates remain low even at higher brackets. In Zurich, a married couple holding a net worth of $2.5 million incurs an effective tax rate of 0.24%, equating to approximately $6,000 annually. For an individual possessing a net worth of $1 billion, the effective rate sits at 0.7%, or $7 million per year.
California Prop 40 Sparks Exodus and Political Battle
In contrast to the Swiss model, California’s Proposition 40 ballot initiative proposes a one-time tax equal to 5% of assets for residents holding a net worth exceeding $1 billion. While polls indicate a close contest, the proposal has already prompted high-profile departures. Sergey Brin relocated to Nevada and contributed over $100 million to oppose the billionaire tax, while Travis Kalanick confirmed his move to Texas.
Supporters of Proposition 40 argue that California’s ultra-rich would retain immense wealth amid the ongoing artificial intelligence boom. Conversely, opponents caution that the tax is unlikely to be a one-time levy and that startup founders could face forced sales of controlling stakes to satisfy tax liabilities stemming from asset valuations. A group of Nobel laureate economists backing the measure stated that it could kickstart a movement
spreading to other states and nations.
U.S. Lawmakers Propose Sweeping Federal Wealth Levies
Federal lawmakers and executives have advanced competing proposals for nationwide taxation of ultra-high-net-worth individuals. Elizabeth Warren has proposed a 2% tax on wealth above $50 million and a 3% tax on wealth exceeding $1 billion. Additionally, Bernie Sanders and Representative Ro Khanna have introduced legislation calling for a 5% tax on billionaires. Scott Kirby has also expressed support for a national wealth tax, while California Gavin Newsom opposes Proposition 40 while backing a federal wealth tax framework.
Gorlick Advocates for a Swiss-Style U.S. Levy
Gorlick argued that a 5% levy on a $1 billion asset base generates a $50 million annual bill, forcing asset sales because wealth does not consistently yield liquid income. He wrote that a wealth tax that assumes capital can be taxed indefinitely at a high rate is a wealth tax that ultimately won’t be paid, because the wealth — or its owner — will simply be gone.
Gorlick recommended that the United States adopt a Swiss-style rate capped at 0.5% for a $1 billion fortune, which would require an annual payment of $5 million. Applying this 0.5% rate to the richest 1% of U.S. households could generate $200 billion annually, providing a partial offset to federal spending and a $40 trillion national debt.
Frequently Asked Questions About Wealth Taxes
How do Swiss cantons calculate wealth tax rates for residents?
Each individual Swiss canton sets its own specific tax rates. Even at the highest cantonal brackets, effective rates remain modest, such as 0.7% for a $1 billion net worth in Zurich.
Why did Sergey Brin and Travis Kalanick leave California?
Both individuals relocated following the introduction of Proposition 40, which proposes a 5% one-time tax on residents with a net worth exceeding $1 billion. Sergey Brin moved to Nevada, and Travis Kalanick relocated to Texas.
What revenue could a Swiss-style U.S. wealth tax generate?
A hypothetical 0.5% levy applied to the richest 1% of U.S. households could generate $200 billion annually, according to estimates by former Treasury policy adviser Warren Gorlick.