Wealth Gains and Potential Approximate Prop. 40 Tax for Select California Billionaires

Table showing the increase in net worth from 2017 to 2026 for several California billionaires, as reported by Forbes, and hypothetical calculations of the tax they could owe under Prop. 40.

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Note: Potential tax calculated as 5% of 2026 Forbes net worth estimate. Because Prop. 40 would tax billionaires on their net worth as of December 31, 2026 and would exclude real property, retirement savings, and certain other assets, these estimates do not reflect the actual tax that these individuals would owe under Prop. 40, but serve as illustrative examples.

Source: Forbes Billionaires List data, 2017 - 2026Download image