Free IFTA Calculator
Enter your miles and fuel purchases by state, and get your quarterly IFTA fuel tax — or credit — instantly. Official Q2 2026 rates for all 58 jurisdictions, Kentucky and Virginia surcharges included.
Q2 2026 returns are due July 31, 2026
Quarterly IFTA Estimate
Q2 2026 rates · updated 2026-04-01 · all math runs in your browser
Total miles
0
Total gallons
0
Fleet MPG
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How IFTA Tax Is Calculated
This tool follows the same method as the official IFTA-101 return, so the estimate matches what your base jurisdiction expects.
- 1
Fleet MPG
Total miles in all jurisdictions ÷ total gallons purchased everywhere. IFTA rounds this to 2 decimal places.
- 2
Taxable gallons per state
Miles driven in the state ÷ your fleet MPG — the fuel you burned there, regardless of where you bought it.
- 3
Net taxable gallons
Taxable gallons − tax-paid gallons you purchased in that state. Buy more than you burned and it goes negative.
- 4
Tax or credit
Net taxable gallons × the state's rate. Positive = you owe; negative = credit. Kentucky and Virginia add a surcharge on all taxable gallons that purchases never offset.
- 5
Net return
Sum every state's tax and credit. That single number — due or refund — is what you settle with your base jurisdiction.
IFTA Filing Deadlines
January 1 – March 31
April 1 – June 30
July 1 – September 30
October 1 – December 31
| Quarter | Reporting period | Due date |
|---|---|---|
| Q1 | January 1 – March 31 | April 30 |
| Q2 | April 1 – June 30 | July 31 |
| Q3 | July 1 – September 30 | October 31 |
| Q4 | October 1 – December 31 | January 31 |
Deadlines falling on a weekend or holiday move to the next business day. Late filings face a penalty of $50 or 10% of the net tax due (whichever is greater), plus interest.
IFTA Diesel Tax Rates by State — Q2 2026
The current diesel (special fuel) rate for every IFTA jurisdiction, from the official IFTA, Inc. tax rate matrix. These are the same rates the calculator above uses.
Rates in USD per gallon. Amounts marked in amber are the Kentucky and Virginia surcharges, charged on all taxable gallons. Oregon shows $0.0000 because it collects a weight-mile tax outside IFTA. Canadian province rates are the official USD-per-gallon conversions.
IFTA Calculator FAQ
How is IFTA tax calculated?+
Divide your total miles by total gallons to get your fleet MPG. For each jurisdiction, divide the miles you drove there by that MPG to get taxable gallons, subtract the tax-paid gallons you purchased there, and multiply the difference by the jurisdiction's tax rate. Negative results are credits. Kentucky and Virginia also charge a surcharge on all taxable gallons, which is never offset by fuel purchases. Your net IFTA liability is the sum across all jurisdictions.
When are IFTA quarterly returns due?+
Q1 (January–March) is due April 30, Q2 (April–June) is due July 31, Q3 (July–September) is due October 31, and Q4 (October–December) is due January 31. If the deadline falls on a weekend or holiday, it moves to the next business day.
Are these the official IFTA tax rates?+
Yes — rates come from the official IFTA, Inc. quarterly tax rate matrix (iftach.org) for the quarter shown, using the Special Diesel column. Rates for Canadian provinces are the matrix's own U.S. dollar-per-gallon conversions. Rates occasionally change mid-quarter, so always verify against the official matrix before filing.
Why does Oregon show a $0.00 rate?+
Oregon doesn't collect fuel tax through IFTA. Instead it runs its own weight-mile tax program that carriers file directly with the state. You still report Oregon miles on your IFTA return (they count toward your fleet MPG), but no IFTA fuel tax is due to Oregon.
What are the Kentucky and Virginia surcharges?+
Kentucky and Virginia charge an extra per-gallon surcharge on every taxable gallon attributed to the state, on top of the base fuel tax. Unlike the base tax, the surcharge can't be reduced by fuel purchases in the state — it's always owed. This calculator adds it automatically. (Indiana's old diesel surcharge was repealed and folded into its base rate.)
Which jurisdictions are part of IFTA?+
The 48 contiguous U.S. states and 10 Canadian provinces (Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland and Labrador, Nova Scotia, Ontario, Prince Edward Island, Quebec, Saskatchewan). Alaska, Hawaii, Washington D.C., the northern territories, and Mexico are not IFTA members.
Is my data saved anywhere?+
No. Every calculation runs entirely in your browser — no miles, gallons, or results are ever sent to our servers, stored, or shared. Close the tab and it's gone.
Can this file my IFTA return for me?+
This free tool gives you an accurate estimate of what you'll owe. You still file with your base jurisdiction. If you want your state-by-state miles tracked automatically from your ELD and your quarterly report generated for you, that's exactly what Truck Command does — it's $20/month with a 14-day free trial.
IFTA that fills itself out
Truck Command pulls state-by-state miles from your ELD, logs fuel as you buy it, and has this whole report waiting for you at the end of the quarter.
No credit card required · 14-day free trial · $20/month
Rates sourced from the official IFTA, Inc. tax rate matrix (iftach.org) for Q2 2026, Special Diesel column; Canadian rates are the matrix's USD-per-gallon conversions. This calculator provides estimates for informational purposes only and is not tax, legal, or accounting advice. Rates can change mid-quarter and split rates may apply in some jurisdictions. Always verify rates with the official matrix and file your return with your base jurisdiction. Truck Command is not affiliated with IFTA, Inc.