Important!

Our Tumwater office is moving. The office will be closed on Friday, October 2, and will reopen at our new location on October 5 at 1 p.m.

Nuestra oficina en Tumwater se está mudando. La oficina se cerrará el viernes 2 de octubre y reabrirá en nuestra nueva ubicación el 5 de octubre a la 1 p. m.  

Compliance studies

This study focuses exclusively on taxpayers registered with the Washington State Department of Revenue. Using the results of a stratified random sample of audits, this report estimates taxpayer noncompliance for state taxes included on the Department's combined excise tax return. Drawing on multiple years of sample data requires statistically projecting the assessments to a single mid year to account for inflation factors and to create measurable and comparable information.