Free IFTA Calculator
Enter your miles and fuel by state and see what you owe or get back from each jurisdiction, using the official Q3 2026 rates. No signup needed.
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How IFTA fuel tax is calculated
Every jurisdiction taxes the fuel your trucks burn on its roads. IFTA works that out from your fleet's average MPG, then credits the tax you already paid at the pump.
Total miles from all qualified trucks divided by total gallons. Example: 30,000 mi ÷ 5,000 gal = 6.00 MPG.
Miles driven in each state divided by fleet MPG. Example: 12,000 mi ÷ 6.00 = 2,000 gal.
Taxable gallons minus gallons bought there, times that state's rate. A positive number is tax due. A negative number is a credit.
Example: 2 trucks, 2 states
Combined Q3 2026 diesel numbers for a small fleet based in Illinois.
| State | Miles | Taxable gal | Bought | Rate | Result |
|---|---|---|---|---|---|
| Illinois | 12,000 | 2,000 | 3,000 | $0.738 | ($738.00) |
| Indiana | 18,000 | 3,000 | 2,000 | $0.630 | $630.00 |
| Net | 30,000 | 5,000 | 5,000 | ($108.00) |
They bought more fuel in Illinois than they burned there, so Illinois owes them a credit that more than covers what they owe Indiana.
Q3 2026 IFTA tax rates by state
Final rates for July 1 to September 30, 2026, in US dollars per gallon. Canadian rates are converted at the quarter's exchange rate of 1.3984. Rates change every quarter, so this table is updated when the new matrix is final.
| Jurisdiction | Diesel | Gasoline | Surcharge / note |
|---|---|---|---|
| United States | |||
| Alabama (AL) | $0.31 | $0.30 | |
| Arizona (AZ) | $0.26 | $0.18 | |
| Arkansas (AR) | $0.285 | $0.247 | |
| California (CA) | $0.979 | Not taxed | |
| Colorado (CO) | $0.335 | $0.28 | |
| Connecticut (CT) | $0.499 | $0.25 | |
| Delaware (DE) | $0.22 | $0.23 | |
| Florida (FL) | $0.4097 | $0.411 | |
| Georgia (GA) | $0.373 | $0.333 | |
| Idaho (ID) | $0.32 | Not taxed | |
| Illinois (IL) | $0.738 | $0.653 | |
| Indiana (IN) | $0.63 | Not taxed | |
| Iowa (IA) | $0.325 | $0.30 | |
| Kansas (KS) | $0.26 | $0.24 | |
| Kentucky (KY) | $0.22 | $0.25 | Diesel +$0.105, gas +$0.045 |
| Louisiana (LA) | $0.20 | $0.20 | |
| Maine (ME) | $0.312 | Not taxed | |
| Maryland (MD) | $0.4745 | $0.466 | |
| Massachusetts (MA) | $0.24 | $0.24 | |
| Michigan (MI) | $0.524 | $0.524 | |
| Minnesota (MN) | $0.326 | $0.326 | |
| Mississippi (MS) | $0.24 | $0.24 | |
| Missouri (MO) | $0.295 | $0.295 | |
| Montana (MT) | $0.2975 | Not taxed | |
| Nebraska (NE) | $0.318 | $0.318 | |
| Nevada (NV) | $0.27 | $0.23 | |
| New Hampshire (NH) | $0.222 | Not taxed | |
| New Jersey (NJ) | $0.561 | $0.491 | |
| New Mexico (NM) | $0.21 | $0.12 | |
| New York (NY) | $0.3805 | $0.398 | |
| North Carolina (NC) | $0.41 | $0.41 | |
| North Dakota (ND) | $0.23 | $0.23 | |
| Ohio (OH) | $0.47 | $0.385 | |
| Oklahoma (OK) | $0.19 | $0.19 | |
| Oregon (OR) | $0.00 | $0.00 | Weight-mile tax state |
| Pennsylvania (PA) | $0.741 | $0.576 | |
| Rhode Island (RI) | $0.40 | $0.40 | |
| South Carolina (SC) | $0.28 | $0.28 | |
| South Dakota (SD) | $0.28 | $0.28 | |
| Tennessee (TN) | $0.27 | $0.26 | |
| Texas (TX) | $0.20 | $0.20 | |
| Utah (UT) | $0.379 | $0.319 | |
| Vermont (VT) | $0.31 | Not taxed | |
| Virginia (VA) | $0.336 | $0.326 | Diesel +$0.143, gas +$0.153 |
| Washington (WA) | $0.595 | $0.565 | |
| West Virginia (WV) | $0.357 | $0.357 | |
| Wisconsin (WI) | $0.329 | $0.329 | |
| Wyoming (WY) | $0.24 | $0.24 | |
| Canada (converted to USD per US gallon) | |||
| Alberta (AB) | $0.3519 | $0.3519 | |
| British Columbia (BC) | $0.406 | $0.3924 | |
| Manitoba (MB) | $0.3383 | $0.3383 | |
| New Brunswick (NB) | $0.4182 | $0.2942 | |
| Newfoundland and Labrador (NL) | $0.2572 | $0.203 | |
| Nova Scotia (NS) | $0.4168 | $0.4196 | |
| Ontario (ON) | $0.2436 | $0.2436 | |
| Prince Edward Island (PE) | $0.383 | $0.2293 | |
| Quebec (QC) | $0.5468 | $0.5197 | |
| Saskatchewan (SK) | $0.406 | $0.406 | |
Source: IFTA, Inc. final 3rd quarter 2026 fuel tax rate matrix. Always confirm rates with your base jurisdiction before filing.
IFTA due dates 2026 to 2027
IFTA returns are due on the last day of the month after each quarter ends. If that day falls on a weekend or holiday, some jurisdictions accept the return on the next business day, so check with your base jurisdiction. The safest plan is to file by the last day of the month.
| Quarter | Period | Due date |
|---|---|---|
| Q3 2026 Due now | Jul to Sep | October 31, 2026 |
| Q4 2026 | Oct to Dec | January 31, 2027 |
| Q1 2027 | Jan to Mar | April 30, 2027 |
| Q2 2027 | Apr to Jun | July 31, 2027 |
| Q3 2027 | Jul to Sep | October 31, 2027 |
File late and it costs more
Late returns usually bring a penalty plus monthly interest on any tax due, and you have to file even if you owe nothing. Sign up for reminders in the calculator above and we'll email you two weeks before each deadline.
Surcharges and special cases
Kentucky and Virginia surcharges
Both add a surcharge on every taxable gallon used there, on top of the regular rate. Fuel you bought in the state doesn't reduce it. This quarter it's $0.105 per gallon of diesel in Kentucky and $0.143 in Virginia. The calculator adds it for you.
Oregon
Oregon is an IFTA member but charges a weight-mile tax instead of fuel tax on most trucks. You still report your Oregon miles, at a rate of $0.00.
Alaska, Hawaii and Washington, DC
None of these is an IFTA member, so leave their miles out. Your total miles should only include IFTA jurisdictions.
Canadian provinces
All 10 provinces are members. The rates here are already converted to US dollars per gallon, so enter Canadian miles and gallons in US units.
Gasoline in some states
California, Idaho, Indiana, Maine, Montana, New Hampshire and Vermont don't tax gasoline through IFTA. Their gasoline rate shows as $0.00 in the calculator.
Reefer fuel
Fuel that runs a reefer unit from a separate tank isn't motor fuel for the truck, so don't include it in your IFTA gallons.
Other mileage taxes besides IFTA
Five states charge their own weight-distance or highway use tax on top of IFTA. You file these directly with each state, no matter where your base jurisdiction is, and you need the state's permit or decal before you drive there. Most are quarterly and due the same day as IFTA, the last day of the month after the quarter ends. You also have to file for a quarter even if you had no miles in that state.
| State | Tax | Applies to | How often you file |
|---|---|---|---|
| Kentucky | KYU weight-distance tax | 60,000 lbs or more | Quarterly |
| Connecticut | Highway Use Fee | 26,000 lbs or more | Quarterly |
| New Mexico | Weight-distance tax | Over 26,000 lbs | Quarterly |
| New York | Highway Use Tax (HUT) | Over 18,000 lbs | Quarterly (some annual) |
| Oregon | Weight-mile tax | Over 26,000 lbs | Monthly or quarterly |
New York sets your schedule from last year's HUT bill: annual if it was $1,200 or less, monthly if it was over $12,000, quarterly for everyone else. Oregon starts carriers on monthly filing and allows quarterly once approved. Running through Kentucky, New Mexico, New York or Oregon only now and then? Each sells trip permits so you can skip the regular filings. Confirm current rules with each state before you file.
IFTA Calculator FAQs
Answers to the questions carriers ask most about quarterly IFTA returns.
Keep Your IFTA Paperwork in One Place
Digital Permit Book keeps your IFTA license on your device, and reminds you before every renewal and filing date.
