Calculate Washington state sales tax and final price on a purchase.
This applies Washington's base state sales tax plus any local rate you enter. Many cities and counties add a local sales tax on top of the state base, so the real rate in a specific location may be higher.
Total
Total = price × (1 + combined rate / 100)
Base rate is approximate; check official state and local rates for a precise figure.
Only the state base is built in; add your city/county rate in the local rate field.
The base rate is approximate and changes; confirm with the official state department of revenue.