U.S. states move to tax QSBS gains, narrowing a federal break for wealthy investors

Several U.S. states are moving to tax gains from qualified small business stock (QSBS), a change that could affect high-net-worth investors and startup founders who rely on the federal incentive to reduce capital gains taxes on startup exits.

The federal QSBS exemption—enhanced by the One Big Beautiful Bill Act—allows eligible investors to exclude up to $15 million in capital gains from federal taxes if certain conditions are met, including holding the stock for more than five years and buying shares directly from a qualifying C corporation.

However, states including Maine and Oregon have recently passed legislation to decouple their tax codes from the federal QSBS rules, meaning taxpayers may still owe state income taxes on QSBS gains. Alabama, Mississippi, Pennsylvania and California already tax QSBS gains.

According to research cited from the U.S. Department of the Treasury, taxpayers earning more than $1 million account for nearly 75% of excluded QSBS gains, suggesting the largest benefits accrue to higher-income households.

The state-level changes are prompting some wealthy individuals to consider relocating or restructuring holdings—such as through trusts in states viewed as more tax-friendly, including Delaware, Nevada and Wyoming—in an effort to reduce state income tax exposure. Lawyers quoted in the source said the shisourcesing patchwork of state rules could influence where founders and investors choose to live, especially ahead of a large liquidity event.