Guides
Guides
One page per question, with the numbers already worked out for the common cases. Every table is produced by the same formulas as the tools, so you can open the tool and change any figure.
IFTA tax calculator
Open the tool- How to calculate IFTA tax, step by step (with a worked example)Fleet MPG, taxable gallons per state, tax-paid credit, net gallons, rate and surcharge: the IFTA return worked through one sample quarter with 3Q2026 rates.IFTA tax calculator
- IFTA fuel tax rates, 3rd quarter 2026: diesel and gasoline by stateDiesel and gasoline rates for all 58 IFTA jurisdictions in 3Q2026 from the IFTA, Inc. matrix, with the Kentucky and Virginia surcharges and the top 10.IFTA tax calculator