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Drive the Highway 99 tunnel? It’ll cost you a bit more starting Tuesday
As explained by the state Transportation Commission, which sets rates for charges such as ferry fares and highway tolls, you’ll pay a bit more to use the Highway 99 tunnel starting Tuesday:
When toll rates were initially set on the SR 99 tunnel in 2018, the Commission included a plan for 3% toll rate increases to take effect every three years, subject to review and possible adjustment by the Commission (WAC 468-270-073 & WAC 468-270-040). The purpose of these planned toll rate increases is to manage ongoing cost inflation and ensure the facility generated the necessary revenue to meet legal requirements.
On May 13, 2025, the Commission approved the next 3% toll rate increase, which will take effect on July 1, 2025.
As summarized here, “Tolls will increase by 5 cents during off-peak and morning hours. Toll rates will increase by 10 cents during evening peak hours.” You can see the current and new rates in tables on this page. Again, the changes kick in on Tuesday (July 1).