Washington State has enacted a new 'millionaire's tax,' imposing a 9.9% levy on annual income exceeding $1 million for individuals or households, marking a significant departure from its longstanding policy of no personal income tax [1]. The bill, championed by State Sen. Jamie Pedersen (D-Seattle) and signed into law by Gov. Bob Ferguson in March 2026, will take effect on January 1, 2028, with the first payments due in 2029. The delayed implementation is intended to allow the Department of Revenue to establish collection systems and to accommodate anticipated constitutional challenges [1].
Sen. Pedersen has dismissed concerns that the tax will trigger an exodus of wealthy residents and businesses, stating, 'The reality is the millionaire tax is not likely to result in businesses leaving,' and emphasizing that business feedback focused more on sales and estate taxes, which the legislature has recently addressed [1]. However, the regional business landscape is already showing signs of strain. Starbucks announced it will relocate 2,000 corporate jobs, mainly in IT and supply chain management, to Nashville, Tennessee—a state with no personal income tax. While Starbucks insists it is not abandoning Seattle, the move has heightened fears of 'tax flight' among local stakeholders [1].
Additionally, several local business owners reported closures due to the expanded retail sales tax on services. In response, the legislature has moved to scale back these expansions and is expected to roll back certain retail taxes within three years [1]. The legal foundation of the tax is contentious, as Washington's Supreme Court has historically classified income as 'property,' which must be taxed at a uniform rate of no more than 1%. To circumvent this, Democrats have labeled the millionaire's tax as an 'excise tax,' a strategy previously used to uphold the state's capital gains tax in 2023 [1]. Sen. Pedersen has expressed his intention to challenge and overturn this longstanding legal precedent [1].
CONCLUSION
Washington's new millionaire's tax represents a major policy shift, sparking debate over its potential impact on business retention and wealth migration. While legislative leaders downplay the risk of an exodus, high-profile moves like Starbucks' job relocation and local business closures suggest significant market disruption. The delayed rollout and ongoing legal challenges will be critical factors to watch as the state navigates this controversial tax reform.