Q4 2026 IFTA diesel rate
Massachusetts IFTA fuel tax rate, Q4 2026
MAMassachusetts · diesel$0.2400/gal
Unchanged from Q3 2026.
Checked 2026-10-14 against mass.gov, Massachusetts's own published rate.
What you owe Massachusetts
IFTA apportions your fuel by miles. Divide total miles by total gallons for fleet MPG, turn your Massachusetts miles into taxable gallons, subtract the tax-paid gallons you bought in Massachusetts, and multiply by $0.2400.
Example: 1,000 miles in Massachusetts at 6.5 MPG is 153.85 taxable gallons. With 100 tax-paid gallons bought there, 53.85 × $0.2400 = $12.92 owed to Massachusetts.
A two-month gas and diesel tax suspension was proposed on Sep 22, 2026 but was not law when we checked.
This rate is for diesel, Q4 2026. You still file with your base jurisdiction; keep your trip records and receipts.