Why It Matters
Washington state’s first-ever personal income tax, signed into law this spring, is generating significant pushback from the business community — raising questions about the state’s economic competitiveness and the long-term fiscal consequences of taxing high earners at a rate approaching 10 percent.
What Happened
Seattle Mayor Katie Wilson dismissed concerns that wealthy residents will flee the city in response to a new statewide income tax, calling warnings of a significant departure “overblown.” Her remarks came after Washington enacted a 9.9% tax on households earning over $1 million annually — the first income tax in state history — which Democratic Governor Bob Ferguson signed on March 30, 2026.
In her own words, Wilson said: “I still think that claims of a large exodus of rich people due to our statewide millionaire tax that the legislature passed this year are overblown.”
The mayor’s dismissal stands in contrast to survey data from the Association of Washington Business, which found that 44 percent of business leaders in the state are weighing a move of their personal residence out of Washington. The same survey found those leaders are twice as likely to pursue business expansion outside the state as within it.
By the Numbers
- 9.9% — the income tax rate applied to households earning more than $1 million per year
- March 30, 2026 — date Governor Ferguson signed the measure into law
- 44% — share of Washington business leaders considering relocating their personal residence out of state
- 2x — how much more likely business leaders said they are to expand operations outside Washington rather than within it
- 90 units — size of the tiny house village in Seattle’s South Park neighborhood, funded in part by Starbucks, T-Mobile, and Microsoft, scheduled to open later this summer
Zoom Out
Washington’s new millionaire tax arrives as several high-tax states confront an accelerating pattern of high-income residents and businesses reconsidering their locations. The concern is not unique to the Pacific Northwest — states such as California, New York, and Illinois have faced similar debates over whether steep levies on top earners generate sustainable revenue or accelerate outmigration of capital and talent.
The state’s fiscal pressures provide important context. Governor Ferguson has already put state agencies on notice as Washington faces a third consecutive budget deficit, signaling that the income tax was introduced against a backdrop of structural revenue challenges rather than surplus conditions. The political dynamics surrounding the tax also intersect with ongoing leadership battles in the state legislature, where the policy direction for the coming session remains unsettled.
Meanwhile, Seattle’s homelessness challenges remain a parallel concern. Major corporations including Starbucks, T-Mobile, and Microsoft are jointly funding a 90-unit tiny house village in the city’s South Park neighborhood, with an opening expected later this summer — an indicator that the private sector continues to engage on social issues even as its relationship with state tax policy grows more contentious.
What’s Next
Whether the millionaire tax produces the business departures that critics predict — or the stable revenue stream supporters expect — will likely become clearer over the coming months as the 2026 tax year progresses and relocation decisions are made. The Association of Washington Business survey results are expected to add pressure on state lawmakers to monitor economic indicators tied to the new levy. Mayor Wilson, who did not respond to a request for comment on the broader business survey findings, will face continued scrutiny as Seattle’s economic health intersects with both state tax policy and the city’s ongoing efforts to address homelessness and housing affordability.