States move to limit QSBS tax break after OBBBA expanded exemption to $15 million

The One Big Beautiful Bill Act broadened the federal QSBS capital-gains exclusion for startup founders and investors, but several states are now moving to tax those gains at the state level. Last month, Maine and Oregon passed bills to decouple from the federal QSBS exemption, while similar proposals in New York and Washington state did not advance. Attorneys said the changes could influence where high-net-worth taxpayers live when they sell stock, even as planning tools such as trusts may still reduce exposure in some cases.