The Biden administration’s 2023 budget proposal includes a “billionaire minimum income tax” that would impose a 20 % minimum tax rate on any U.S. household with a net worth exceeding $100 million. The measure is framed as an unrealized‑capital‑gains tax, meaning it would tax wealth based on its market value rather than on cash income alone.
How the tax would work
- Threshold: Net‑worth > $100 million (including assets such as businesses, real estate, art, collectibles, and cryptocurrency holdings).
- Rate: A minimum effective tax rate of 20 % on the household’s total income, which the proposal says includes both realized and unrealized gains.
- Scope: The tax would apply to the full income of qualifying households, not just to the portion of income that is actually realized in cash.
Potential reach
- The proposal is presented as targeting the “richest 0.2 %,” but analysts suggest it could affect far more than the roughly 700 families traditionally classified as billionaires.
- Valuations of privately held businesses are rising; high multiples in venture‑capital and tech sectors could push the market value of many entrepreneurs above the $100 million threshold even if their cash flow is modest.
- Crypto investors who have seen rapid appreciation could also cross the threshold, as examples of portfolios growing from $50 k to $20 million illustrate the volatility of asset‑based wealth.
Historical context
- Between 2010 and 2018, the 400 wealthiest U.S. families paid an effective federal tax rate of about 8 % on their income, according to the White House Office of Management and Budget and the Council of Economic Advisers.
- By contrast, the proposed 20 % minimum would place the wealthiest taxpayers on a comparable footing with public‑sector workers such as teachers and firefighters, who typically face higher marginal rates.
Implications for business owners and investors
- Business valuations: If a company is valued at $80 million based on current market multiples, it could be counted toward the $100 million threshold even if the owner draws only a modest salary.
- Unrealized gains: Assets that have not been sold could still be taxed, creating cash‑flow pressures for owners who need liquidity to meet the tax bill.
- Crypto exposure: Rapid appreciation in digital assets could trigger the tax without a corresponding cash event, forcing investors to liquidate or seek alternative tax‑efficient structures.
Strategic considerations
- Residency planning: Establishing tax residency in a jurisdiction with lower or no wealth taxes can mitigate exposure.
- Second passport: Holding citizenship or residency in another country provides flexibility to relocate if U.S. tax policy becomes prohibitive.
- Asset diversification: Spreading wealth across jurisdictions and asset classes can reduce the concentration of taxable value in any single tax regime.
- Valuation monitoring: Regularly assess the market value of private holdings, especially when using high‑multiple valuations, to anticipate potential tax liabilities.
Practical steps
- Review all assets—including private business equity, real estate, collectibles, and crypto—for current fair‑market values.
- Model cash‑flow scenarios under a 20 % minimum tax to determine liquidity needs.
- Consult tax professionals experienced in cross‑border wealth planning to explore residency options and treaty benefits.
- Consider establishing holding structures (e.g., foreign corporations or trusts) that may provide deferral or reduction of U.S. tax exposure, while remaining compliant with reporting obligations.
The proposal underscores a broader political trend toward taxing wealth rather than just income. Even if the legislation does not pass in its current form, the discussion signals a potential “slippery slope” that could expand tax obligations for high‑net‑worth individuals in the United States. Staying informed and preparing an international diversification strategy can help mitigate future tax risks.
