Washington State Business Owners
Advertising Services
Beginning October 1, 2025, advertising services are subject to state and local sales tax under WAC 458-20-218. This includes creative design, campaign planning, media placement, digital marketing, and related services. You’ll now see sales tax applied to invoices for advertising services in compliance with Washington State law.
Custom Software & Website Development
Under WAC 458-20-15502, charges for custom software development and website projects—including modifications, enhancements, and hosted applications—are subject to retail sales tax. This ensures consistent taxation across all types of software and digital products. Invoices will now reflect the required state and local sales tax.
Link to new taxes under the Washington Department of Revenue effective October 1, 2025 | Washington Department of Revenue
Tax Rate Look-up Tool by Address
Get a binding tax rule from the State: Request a tax ruling | Washington Department of Revenue