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Why It Matters
Washington drivers are already paying some of the highest fuel prices in the country, and a new tax increase taking effect July 1 will push the state’s gas tax to the third-highest in the nation. At the same time, transportation officials are projecting a significant revenue shortfall — meaning taxpayers will pay more at the pump while the state has less money than expected to maintain its roads and infrastructure.
What Happened
Washington’s gas tax rises 1.1 cents per gallon on July 1, moving from 55.4 cents to 56.5 cents per gallon. The diesel tax increases by the same 2% rate, climbing from 58.4 cents to 59.5 cents. The adjustment is required under a 2025 law that built annual inflationary increases into the state’s transportation funding structure.
The July 1 changes go beyond fuel taxes. Truck weight fees are also rising 2%, the retail sales tax on boats and recreational vessels is increasing half a percentage point to 7%, and the vehicle title and registration fee for out-of-state transfers jumps from $50 to $75.
With Washington’s average price for regular unleaded gasoline sitting at $5.32 per gallon, drivers in the state already face some of the steepest pump prices in the country. The updated gas tax rate will trail only California and Pennsylvania nationally.
By the Numbers
- $5.32 — average price per gallon for regular unleaded in Washington as of this week
- 56.5 cents — state gas tax rate per gallon after July 1, third-highest in the nation
- $435 million — total transportation revenue shortfall projected across three budget cycles
- $36 million — revenue gap in the current transportation budget alone
- $130 million — projected shortfall for the 2027–29 transportation budget
- $200 million — additional highway maintenance funding the legislature committed over three budget cycles
Revenue Falling Despite Higher Taxes
Even with the rate increases, Washington’s transportation revenue forecast has dropped considerably from earlier projections. Over three consecutive budget cycles, collections are expected to come in $435 million below previous estimates. The current budget faces a $36 million gap, the next budget a $130 million shortfall, and the 2029–31 biennium is forecast at $10 billion — down from earlier projections.
The decline is being driven by lower-than-expected receipts from gas taxes, vehicle registration fees, and rental car taxes. Gasoline taxes make up nearly 40% of transportation revenues, making the category especially sensitive to shifts in fuel consumption and vehicle trends. Licenses, permits, and other fees account for roughly 25% of transportation revenues, while Climate Commitment Act accounts contribute about 8.3%.
Washington State Ferries fares, tolls, and other miscellaneous sources make up just over a quarter of the overall revenue picture.
Zoom Out
The revenue squeeze in Washington reflects a broader challenge facing transportation budgets across the Mountain West and Pacific Northwest as fuel-efficient and electric vehicles reduce per-mile gas tax collections. States that have increasingly relied on gas tax revenue are finding the funding base eroding even as infrastructure needs grow.
Washington’s 2025 legislative transportation package included a 6-cent increase in the gas tax and a 9-cent increase for diesel — part of a broader effort to shore up long-term infrastructure funding. But those increases are now running headlong into a weakening revenue forecast, putting lawmakers in the difficult position of having raised taxes on drivers while still coming up short on projected collections.
What’s Next
The new rates and fees take effect July 1. Lawmakers have already committed an additional $200 million toward highway maintenance over three budget cycles, but the $435 million cumulative shortfall is likely to force further budget decisions in coming legislative sessions. Transportation officials will continue monitoring collections as the inflationary adjustment mechanism works through successive years.
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