IFTA fuel tax estimate
Net fuel tax owed or credited per jurisdiction for a quarter, from miles, gallons bought and tax rates.
Get this tool with its role plan
This is a premium tool. It comes with its role's plan: sign in, then add the role in Billing.
Comes with the fleet and rental manager plan: every tool for the role, from $10.20 a month at the launch price.
- Your own numbers, worked out as often as you like
- The full worksheet you can print or save to My work
- 4 cited sources, linked, with the checks to make
- Every other tool for the same role, in the same plan
- A plain-words read of your result (a fuller AI read with the Bifrost AI add-on)
Included in these role plans
Example result · fictional numbers
What you get: worksheet
Worked out by this tool from its default inputs. Its role plan lets you run your own numbers, print the sheet and save it.
Q3 2026: owe $45.38 across 3 jurisdictions, due Monday, November 2, 2026
- Fleet average mpg
- 6.79
- Jurisdiction A
- 619 taxable gal; credit $59.75
- Jurisdiction B
- 457 taxable gal; owe $3.22
- Jurisdiction C
- 324 taxable gal; owe $101.91
- Net for the quarter
- Owe $45.38
Quarterly worksheet (all jurisdictions)
- Fleet
- 9,500 miles, 1,400 gallons, 6.79 mpg
- IL
- 4,200 mi · 618.95 taxable gal − 800 tax-paid = -181.05 gal × $0.33 = credit $59.75
- IN
- 3,100 mi · 456.84 taxable gal − 450 tax-paid = 6.84 gal × $0.47 = owe $3.22
- OH
- 2,200 mi · 324.21 taxable gal − 150 tax-paid = 174.21 gal × $0.585 = owe $101.91
- Net for the quarter
- Owe $45.38
- Rounding
- Uses the unrounded fleet mpg, like the base tool. A return that rounds mpg to two decimals can differ by a few cents.
Also on the sheet
- Filing · 5 lines, starting with “Quarter”
- Records to keep · 3 lines, starting with “Trip records”
The plain-words read of this example
For Q3 2026, 9,500 miles and 1,400 gallons across 3 jurisdictions give 6.79 mpg, and you owe $45.38 in total. The biggest line is OH: 2,200 miles need 324 taxable gallons against 150 bought there, so you owe $101.91. The return is due Monday, November 2, 2026; filing or paying late costs at least $50 or 10% of the tax due. The rates are the ones you entered, so check them against this quarter's IFTA matrix, and keep trip and fuel records for four years.
4 cited sources
- IFTA Articles of Agreement, Procedures Manual and quarterly tax rate matrix (IFTA, Inc.)
- IFTA record keeping requirements (Iowa Department of Transportation)
- When are the IFTA returns due to be filed? (Nebraska Department of Motor Vehicles)
- Am I subject to interest or penalties if I fail to timely file an IFTA return? (Michigan Department of Treasury)
Plus 4 step-by-step checks, a print layout and a link that reopens it with your numbers.