No, Washington Didn't Just Pass a Wealth Tax. Here's What It Did Pass.

Key Takeaways

• ESSB 6346 taxes household income over $1 million at 9.9% starting 2028
• Prior wealth‑tax bills (SB 5797, HB 1319) failed; thresholds were $50 M/$100 M
• Washington already levies 9.9% on long‑term capital gains above $1 M
• High‑earners have until end of 2027 to restructure for tax efficiency

Pulse Analysis

Washington’s tax landscape has been in flux for years, but the most visible change came from a graphic promoting a so‑called "Capital Assets Ownership Tax" that never became law. The proposal, split between SB 5797 and HB 1319, sought to tax intangible assets—stocks, bonds, ETFs—once holdings exceeded $50 million or $100 million. Both bills stalled in committee during the 2026 short session, reflecting the political reality that wealth taxes attract fierce opposition and risk capital flight, as seen in France and other jurisdictions that rolled back similar measures.

The legislation that did pass, ESSB 6346, imposes a flat 9.9% rate on any household taxable income above $1 million, using federal adjusted gross income as the baseline. It takes effect in 2028, with the Department of Revenue projecting roughly 21,000 filers in the first year, concentrated in affluent Seattle‑area districts. Importantly, Washington already levies a 9.9% tax on long‑term capital gains over $1 million (SB 5813, 2025). ESSB 6346 layers an income‑tax component on top of that, but includes a credit to avoid double‑taxing the same gain. For founders with large private‑company stock holdings, the tax only bites when they realize income—through RSU vesting, bonuses, or a liquidity event—making early planning essential.

The broader implication is a clear policy trajectory: Washington is moving from a pure consumption‑tax model toward a hybrid system that captures high earners’ income while keeping the door open for future wealth‑tax adjustments. Stakeholders should use the 2026‑27 window to reassess entity structures, domicile choices, and QSBS eligibility, as these decisions have lasting tax consequences. Compared with neighboring states that still lack an income tax, Washington’s new regime may affect talent attraction and corporate location strategies, prompting businesses to weigh the cost of relocation against the benefits of operating in a traditionally tax‑friendly environment.