Washington State has enacted a '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 legislation, signed by Gov. Bob Ferguson in March 2026, will take effect on January 1, 2028, with the first payments due in 2029. The delay is intended to allow the Department of Revenue to establish collection infrastructure and to accommodate anticipated constitutional challenges [1].
State Sen. Jamie Pedersen (D-Seattle), the bill's architect and Senate Majority Leader, 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' [1]. Pedersen emphasized that business concerns are more focused on the sales tax on services and the estate tax, both of which the legislature addressed in the last session [1]. He asserted, 'I do not have any indication that the millionaire's tax is going to cause some significant exodus' [1].
Despite Pedersen's optimism, the business community has shown signs of strain. Starbucks recently announced the relocation of 2,000 corporate jobs, primarily in IT and supply chain management, to Nashville, Tennessee—a state with no personal income tax. While Starbucks maintains its commitment to Seattle, the move has heightened fears of 'tax flight' among local businesses [1]. Additionally, several local business owners reported closures due to the expanded retail sales tax on services, prompting the legislature to scale back these expansions and plan further rollbacks within three years [1].
The legal foundation of the tax is contentious. Since the 1930s, the Washington State Supreme Court has classified income as 'property,' which must be taxed at a uniform rate no higher 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]. Pedersen has expressed a desire to overturn this longstanding case law [1].
CONCLUSION
Washington's new millionaire tax has ignited debate over its potential impact on business and wealth migration, with Starbucks' job relocation underscoring concerns. While legislative leaders remain confident the tax will not drive significant exodus, early business reactions and legal challenges suggest ongoing uncertainty. The market is watching closely as the state prepares for implementation and possible court battles.