Repealing the estate tax.

HB 1666 would repeal Washington's estate tax, which applies to estates exceeding certain thresholds upon the death of an individual. This directly affects individuals and families with significant assets who would have owed tax on inherited property. The bill removes all existing estate tax laws from state code (including definitions, tax calculations, and filing requirements) and takes effect for deaths occurring on or after August 1, 2025. The legislation aims to eliminate a tax the state legislature claims discourages residency and investment.