House Bill 2421 creates a new statewide tire fee and chemical ban tied to a substance used in most vehicle tires. Starting in 2027, the bill adds a new “6PPD mitigation fee” on replacement tires: $3 per tire for smaller vehicles and $6 per tire for larger vehicles, in addition to the existing $5 tire fee Washingtonians already pay at checkout.
The bill also requires the new fee to automatically increase by 10% each year, compounding costs without additional votes by lawmakers.
In addition, the bill prohibits retailers from clearly listing this new mitigation fee as a separate line item on receipts, meaning consumers will pay more without seeing exactly what they are being charged.
Beginning in 2035, the bill bans tires containing this chemical, forcing manufacturers and retailers to overhaul supply chains on a state-mandated timeline. State agencies are given broad authority to regulate tire chemistry, approve alternatives, and impose penalties for noncompliance.
Why is this a bad policy?
Bottom line
HB 2421 creates a hidden, escalating tire tax, expands state control over consumer products, and raises the cost of everyday transportation. It increases the cost of car ownership, reduces transparency at checkout, and adds another financial burden on Washington families amid an ongoing affordability crisis.
Last updated: April 13, 2026 - 9:59 am