Maryland IFTA Tax Rate — 2026

How Maryland IFTA tax is calculated

For every gallon of diesel your truck "burned" inside Maryland during the quarter, you owe $0.4675 in IFTA tax. The number of taxable gallons isn't the gallons you bought there — it's the miles you drove inside Maryland divided by your fleet's average miles-per-gallon for the whole quarter.

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

Common Maryland IFTA filing questions

• Do I file IFTA in Maryland if my home base is here? If your IFTA base jurisdiction is Maryland, you file your quarterly return with the Maryland Department of Revenue (or equivalent). Your filing covers every IFTA jurisdiction you ran in, not just Maryland.
• What if I only drove a few miles through Maryland? 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) Maryland's share whether you bought fuel here or not.
• What if Maryland fuel is cheaper than the IFTA tax? The IFTA rate above is what you owe per gallon "consumed" in Maryland. The pump price already includes Maryland'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 Maryland, you'll owe the full Maryland rate on those gallons at filing time.

Maryland IFTA filing deadlines

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

• 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.