NEW LAW: Washington’s 9.9% income tax on households earning over $1M takes effect January 1, 2028 — planning windows are closing.
Washington State Tax Planning · 2026
Washington just changed the rules for high-net-worth families.
Senate Bill 6346 introduces the state’s first-ever personal income tax — a 9.9% levy on household income above $1 million. Combined with Washington’s capital gains excise tax and one of the nation’s lowest estate tax exemptions, the cost of staying in Washington is rising fast. Run your numbers before 2028 arrives
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