Idaho IFTA Calculator
Idaho IFTA fuel tax rates, Q3 2026
| Fuel type | Rate per gallon | Change from last quarter |
|---|---|---|
| Diesel | $0.3200 | No change |
| Gasoline | N/A | — |
| Propane (LPG) | $0.2320 | No change |
| LNG | $0.3490 | No change |
| CNG | $0.3200 | No change |
| Biodiesel | $0.3200 | No change |
- Diesel rate rank among IFTA jurisdictions
- 32 of 57
- Administered by
- Idaho State Tax Commission
- State agency IFTA page
- tax.idaho.gov
Calculate your Idaho 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 | +$0.0860 |
| Montana (MT) | $0.2975 | -$0.0225 |
| Nevada (NV) | $0.2700 | -$0.0500 |
| Oregon (OR) | N/A | N/A |
| Utah (UT) | $0.3790 | +$0.0590 |
| Washington (WA) | $0.5950 | +$0.2750 |
| Wyoming (WY) | $0.2400 | -$0.0800 |
Diesel rate by quarter
| Quarter | Rate per gallon |
|---|---|
| Q3 2026 | $0.3200 |
| Q2 2026 | $0.3200 |
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