IFTA diesel tax rates

State diesel tax rates for each quarter, with surcharges, in one table per quarter.

Rates by quarter

Rates by state

One page per jurisdiction with the current Q4 2026 diesel rate, every past quarter loaded here, and how that state’s rate lands on your return.

* plus surcharge. n/a: no IFTA diesel tax (weight-mile tax instead).

What IFTA is

The International Fuel Tax Agreement lets a carrier running qualified motor vehicles in more than one jurisdiction file a single fuel tax return with its base state. Each quarter you report miles driven and gallons bought in every state. The return works out the tax owed on fuel burned in each state, subtracts the tax you already paid at the pump there, and your base state settles the difference with the others.

Rates can change every quarter, so use the table for the quarter you are filing. Returns are due on the last day of the month after the quarter ends:

Q1 (January–March): April 30
Q2 (April–June): July 31
Q3 (July–September): October 31
Q4 (October–December): January 31 of the next year

If a due date falls on a weekend or legal holiday, the return is due the next business day. Exact dates and the next deadline are on the IFTA due dates page.

Email me 7 days before each IFTA deadline

Four emails a year, one per quarter. Your address is used only for these reminders. Unsubscribe in one click.

Estimate your return

Enter miles and gallons by state in the free IFTA calculator to see the estimated tax, credit and net amount per state. It is an estimate, not a filing.

Verify with your base jurisdiction before filing.

freightline does this automatically from your ELD miles and fuel receipts

Miles by state come from your loads and ELD, gallons from fuel-card imports and receipts, and the quarter’s rates are already loaded. Try it on your own trucks free for 30 days, no credit card.

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