Washington state's legislature has approved a new income tax specifically targeting millionaires, with the measure now heading to Governor Jay Inslee's desk for signature. The tax represents a significant policy shift for a state historically without a personal income tax. The legislation passed despite concerns from critics about potential wealthy resident exodus.

The "millionaires tax" comes as several states nationwide are reviving efforts to increase taxes on high earners amid growing wealth inequality debates. Washington joins other states exploring similar measures to generate revenue from affluent residents. The policy shift reflects broader discussions about tax equity and state revenue generation.

Specific tax rates and implementation details remain to be finalized as the governor is expected to sign the legislation into law. The measure targets individuals with substantial income, though exact thresholds have not been fully detailed in available reports. Revenue projections and affected population estimates are still being calculated.

The new tax could influence wealthy residents' decisions about state residency, with some potentially relocating to avoid the levy. State officials will monitor implementation effects on both revenue generation and resident migration patterns. The policy may serve as a model for other states considering similar wealth-targeting tax measures.