On page 7, after line 21, insert the following:
"(4)(a) For estates of decedents dying in calendar year 2026 and each calendar year thereafter, the Washington taxable estate amounts in the table in subsection (2)(a)(ii) of this section must be adjusted annually. The annual adjustments are determined by multiplying the Washington taxable estate amounts by the sum of one and the percentage by which the most recent October consumer price index exceeds the consumer price index for October 2024, and rounding the result to the nearest $1,000. No adjustments to the Washington taxable estate amounts are made for a calendar year if the adjustments would result in the same or lesser applicable Washington taxable estate amounts than the Washington taxable estate amounts for the immediately preceding calendar year.
(b) For purposes of this subsection (4), "consumer price index" means the consumer price index for all urban consumers, all items, for the Seattle metropolitan area as calculated by the United States bureau of labor statistics. For the purposes of this subsection (4), "Seattle metropolitan area" means the geographic area sample that includes Seattle and surrounding areas."