Pennsylvania IFTA Calculator

Pennsylvania has the highest diesel tax rate in the country by a significant margin at $0.746 per gallon — more than triple the national average and nearly $0.50 more than its neighbor Ohio. This rate is not a typo. It reflects Pennsylvania's Constitutional dedication of all motor fuel tax revenue to transportation infrastructure through a funding formula that results in the highest effective fuel tax in the nation. Every neighboring state — New York at $0.4395, New Jersey at $0.4215, Ohio at $0.470, West Virginia at $0.3575, Maryland at $0.369, and Delaware at $0.220 — is dramatically cheaper.

The fuel purchase strategy in Pennsylvania is absolute: fill your tank completely in any adjacent state before entering Pennsylvania, and if possible, exit Pennsylvania and refuel before re-entering. On a 150-gallon fill, the difference between Pennsylvania's $0.746 and Delaware's $0.220 is $78.90 per fill. For a carrier running daily deliveries in the Delaware Valley area, this difference could represent $1,000+ per month in fuel tax cost.

Pennsylvania's highway system is centered on the Pennsylvania Turnpike (I-76), which runs from New Jersey through Philadelphia, Harrisburg, and Pittsburgh to Ohio — it is a toll road with per-axle commercial vehicle rates. I-78 crosses the southeast corner. I-80 runs across the northern tier from New Jersey to Ohio. I-81 runs north-south through the Lehigh Valley and Harrisburg region. I-376 connects Pittsburgh to the Ohio border.

Standard weight limits are 80,000 lbs. Weigh stations on the Turnpike are integrated into toll plazas. PennDOT runs active commercial vehicle enforcement. For IFTA compliance, Pennsylvania's extremely high rate means any gallons purchased outside Pennsylvania but burned in the state create a substantial tax liability — accurate mileage records are critical and Pennsylvania IFTA auditors scrutinize returns carefully.