Interest rate tables

Contact DORStatistics@dor.wa.gov for periods not listed on this table. 

Excise tax

Calendar year

Assessment rate 

Refund rate

2025 7% 7%
2024 6% 6%
2023 3% 3%
2022 2% 2%
2021 3% 3%
2020 4% 4%
2019 4% 4%
2018 3% 3%
2017 3% 3%
2016 2% 2%
2015 2% 2%