Pennsylvania IFTA Tax Rate — 2026

How Pennsylvania IFTA tax is calculated

For every gallon of diesel your truck "burned" inside Pennsylvania during the quarter, you owe $0.7410 in IFTA tax. The number of taxable gallons isn't the gallons you bought there — it's the miles you drove inside Pennsylvania divided by your fleet's average miles-per-gallon for the whole quarter.

Your IFTA return then nets that against the Pennsylvania fuel-tax you already paid at the pump on gallons purchased inside the state. If you ran more Pennsylvania miles than you bought Pennsylvania fuel, you owe the difference. If you bought more Pennsylvania fuel than you ran Pennsylvania miles, you get a refund or credit.

Pennsylvania-specific notes

Pennsylvania has the second-highest IFTA diesel rate after California. Carriers running heavy I-80 / I-76 corridors usually owe a meaningful Pennsylvania balance even with full PA fuel buys.

Common Pennsylvania IFTA filing questions

• Do I file IFTA in Pennsylvania if my home base is here? If your IFTA base jurisdiction is Pennsylvania, you file your quarterly return with the Pennsylvania Department of Revenue (or equivalent). Your filing covers every IFTA jurisdiction you ran in, not just Pennsylvania.
• What if I only drove a few miles through Pennsylvania? Every IFTA mile counts, even if you only crossed the state. Track them on your trip sheet or ELD report — you'll owe (or get refunded) Pennsylvania's share whether you bought fuel here or not.
• What if Pennsylvania fuel is cheaper than the IFTA tax? The IFTA rate above is what you owe per gallon "consumed" in Pennsylvania. The pump price already includes Pennsylvania's state fuel tax — that's what gets credited on your return. If you bought all your fuel in a low-tax state and drove all your miles in Pennsylvania, you'll owe the full Pennsylvania rate on those gallons at filing time.

Pennsylvania IFTA filing deadlines

IFTA returns are due quarterly across all 48 contiguous U.S. states, including Pennsylvania:

• Q1 (Jan–Mar): due April 30
• Q2 (Apr–Jun): due July 31
• Q3 (Jul–Sep): due October 31
• Q4 (Oct–Dec): due January 31

Late filings collect penalties even if you owe nothing — some states charge $50 minimum per late return. File on time even if your net due is $0.