Maine diesel tax rate is 31.2¢ per gallon for 2026. Calculate your quarterly IFTA fuel tax liability for Maine routes and compare to neighboring states.
Maine at 31.2¢/gal is slightly below average for the Northeast — a region known for high diesel rates. Maine is the northernmost US IFTA state and borders only New Hampshire to the south and Canada to the north. Most Maine-based carriers run the I-95 corridor to Boston and southern New England, where rates climb sharply (CT 49.2¢, RI 34.0¢).
I-95 (Portsmouth NH–Portland–Bangor–Houlton, primary north-south), I-295 (Portland–Brunswick, coastal spur), US-2 (Bangor–Bethel, east-west secondary), I-195 (Biddeford/Saco spur)
Portland is Maine's primary freight market and port city. Bangor serves as the commercial hub for northern Maine's logging, paper, and agricultural freight. The border crossing at Houlton (I-95 into New Brunswick, Canada) is the major commercial entry point for Canadian freight. New Hampshire to the south at 22.2¢ is meaningfully cheaper — fuel before entering Maine from the south.