IFTA Fuel Tax Calculator (Simplified)

Get a quick, simplified estimate of your quarterly IFTA position. Enter your total miles driven, fleet average MPG, total gallons purchased, and an average fuel tax rate — this calculator estimates whether you're likely to owe or be credited, using one blended rate instead of a full per-jurisdiction breakdown.

Estimate Your Quarterly IFTA Position

Total Miles Driven (Quarter)

Fleet Average MPG

Total Gallons Purchased (Quarter)

Average Fuel Tax Rate ($/gallon)

Estimated Gallons Consumed0

Tax Owed on Miles Driven$0.00

Tax Credit from Fuel Purchased$0.00

Net IFTA Due (negative = refund)$0.00

TruckingToolCalc calculators are for informational and educational purposes only. Results are estimates based on the inputs you provide and should not be relied upon as financial, legal, or professional advice. Always verify figures with a qualified accountant or business advisor before making pricing or business decisions. TruckingToolCalc accepts no liability for decisions made based on calculator outputs.

Free — No sign-up required

Don't lose
your numbers.

Close this tab and your breakdown is gone. We'll email it to you — every figure, line by line — ready to drop into a quote or hand to your accountant.

Your results by email. No spam, ever.

We’ll occasionally send useful trucking tools and tips. Unsubscribe anytime.

Delivered to your inbox
Save or forward for your records
Your email stays private

We use your email to send your results and occasional trucking tools and tips. Every email includes an unsubscribe link. Privacy Policy.

One quick check.

If you see a checkbox below, click it to confirm you're human — this is what sends your results. If nothing appears, you're already done.

Once you see a confirmation message above, your results are on the way.

Sent! Check your inbox.

We've emailed your results to your inbox. Check spam if it's not there in a minute.

Something went wrong.

We couldn't send your results. Please try again.

↓Take Your Numbers Further

3 Products for Owner-Operators & Fleets

$47 each

Small Fleet Edition, Truck Purchase & Lease Decision Calculator, and Fuel Card & Telematics/ELD Comparison — three focused workbooks, each $47, invoice-based.

Explore All 3 Products →

IFTA Fuel Tax Calculator — Frequently Asked Questions

This is a simplified estimate built for a fast gut-check, not a filing — actual IFTA rates vary by jurisdiction and change quarterly. A full IFTA filing works from per-jurisdiction miles and rates - which is exactly the record-keeping this simplified free version deliberately skips.

You rarely buy fuel in exactly the jurisdictions where you burn it, and your tank level at the start and end of the quarter differs — that mismatch between miles-implied consumption and actual purchases is exactly what IFTA reconciles, and exactly what creates a due or credit balance.

It means your estimated tax liability based on miles driven is higher than the tax you've already paid at the pump on fuel purchased this quarter — so you'd likely owe money on your actual IFTA return, though the real number depends on per-jurisdiction detail this simplified version doesn't capture.

No — treat this strictly as a planning estimate. Real IFTA filing requires mileage and fuel purchase records broken out by jurisdiction, which this simplified free calculator intentionally doesn't attempt.

Add up the per-gallon fuel tax rates for the states or provinces you ran through most this quarter and average them, weighted roughly by miles driven in each. Your prior quarter's IFTA return, if you have one, is usually the fastest source for a realistic blended number.