Washington IFTA Calculator
Washington IFTA fuel tax rates, Q3 2026
| Fuel type | Rate per gallon | Change from last quarter |
|---|---|---|
| Diesel | $0.5950 | — |
| Gasoline | $0.5650 | — |
| Propane (LPG) | N/A | — |
| LNG | N/A | — |
| CNG | N/A | — |
| Biodiesel | $0.5950 | — |
- Diesel rate rank among IFTA jurisdictions
- 5 of 57
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- State agency IFTA page
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Calculate your Washington IFTA tax
Return due Nov 2, 2026
The state that issued your IFTA license. It appears on your worksheet.
- Total miles
- 0
- Total gallons
- 0
- Fleet MPG
- —
Diesel tax in neighboring jurisdictions
| Jurisdiction | Effective rate per gallon | Compared with here |
|---|---|---|
| British Columbia (BC) | $0.4060 | -$0.1890 |
| Idaho (ID) | $0.3200 | -$0.2750 |
| Oregon (OR) | N/A | N/A |
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