IFTA Tax Calculator
Estimate your quarterly IFTA fuel tax by state. Enter miles and diesel gallons per jurisdiction, and we compute the taxes due using theofficial 3Q2026 IFTA tax rates for all 58 US and Canadian jurisdictions.
1. Enter your quarterly totals
Your average fuel economy (MPG) is computed automatically: total miles ÷ total gallons.
2. Miles & gallons by state
Add a row for each state you drove through. You only need miles; gallons purchased in that state are used as a tax credit.
3. Your IFTA estimate
| State | Miles | Gallons | Rate/gal | Tax due | Credit | Net |
|---|
What is IFTA and how does the tax work?
The International Fuel Tax Agreement (IFTA) is a compact among 48 US states and 10 Canadian provinces that simplifies fuel tax reporting for trucking companies and owner-operators. Instead of filing a fuel tax return in every state you drive through, you file one quarterly return with your base jurisdiction. That single return covers all member jurisdictions — but the tax owed is still calculated separately for each one.
The idea is simple: you pay tax on the fuel you buy, and you owe tax on the fuel you burn. The difference is settled quarterly:
- Miles per state — how far you drove in each jurisdiction (from your ELD or trip records).
- Average MPG — your fleet's miles per gallon (total miles ÷ total gallons purchased).
- Tax rate per state — each jurisdiction sets its own fuel tax rate, and they change every quarter.
- Credits — the tax you already paid when buying fuel in each state offsets the tax due for miles driven there.
How to read your results
For each state, the calculator computes:tax due = (miles ÷ MPG) × state rate, then subtractscredits = gallons purchased in that state × that state's rate. The net figure is what you owe (or the credit you carry forward) for that jurisdiction. The final number at the top is your total net position for the quarter — what you would pay on your IFTA return before any base-jurisdiction adjustments.
Important: this is an estimate for planning. Your actual return must be filed through your base jurisdiction's portal, and rates are finalized by each state. Always confirm against the official IFTA matrix for your filing quarter.
IFTA tax rates by state — 3Q2026
The full rate table used by this calculator, straight from the official IFTA matrix. Rates are in US dollars per gallon of diesel.
| State | Diesel rate/gal |
|---|---|
| California (CA) | $0.9790 |
| Pennsylvania (PA) | $0.7410 |
| Illinois (IL) | $0.7380 |
| Indiana (IN) | $0.6300 |
| Washington (WA) | $0.5950 |
| New Jersey (NJ) | $0.5610 |
| Michigan (MI) | $0.5240 |
| Connecticut (CT) | $0.4990 |
| Ohio (OH) | $0.4700 |
| Maryland (MD) | $0.4675 |
| North Carolina (NC) | $0.4100 |
| Florida (FL) | $0.4097 |
| Rhode Island (RI) | $0.4000 |
| New York (NY) | $0.3805 |
| Utah (UT) | $0.3790 |
| Georgia (GA) | $0.3730 |
| West Virginia (WV) | $0.3570 |
| Colorado (CO) | $0.3350 |
| Wisconsin (WI) | $0.3290 |
| Minnesota (MN) | $0.3260 |
| Iowa (IA) | $0.3250 |
| Idaho (ID) | $0.3200 |
| Nebraska (NE) | $0.3180 |
| Maine (ME) | $0.3120 |
| Alabama (AL) | $0.3100 |
| Vermont (VT) | $0.3100 |
| Montana (MT) | $0.2975 |
| Missouri (MO) | $0.2950 |
| Arkansas (AR) | $0.2850 |
| South Carolina (SC) | $0.2800 |
| South Dakota (SD) | $0.2800 |
| Nevada (NV) | $0.2700 |
| Tennessee (TN) | $0.2700 |
| Arizona (AZ) | $0.2600 |
| Kansas (KS) | $0.2600 |
| Massachusetts (MA) | $0.2400 |
| Mississippi (MS) | $0.2400 |
| Wyoming (WY) | $0.2400 |
| North Dakota (ND) | $0.2300 |
| New Hampshire (NH) | $0.2220 |
| Delaware (DE) | $0.2200 |
| New Mexico (NM) | $0.2100 |
| Louisiana (LA) | $0.2000 |
| Texas (TX) | $0.2000 |
| Oklahoma (OK) | $0.1900 |
| Virginia (VA) | $0.1430 |
| Kentucky (KY) | $0.1050 |
| Oregon (OR) | See ODOT |
Frequently asked questions
How often do I file IFTA?
IFTA returns are filed quarterly: January–March, April–June, July–September, and October–December. The deadline is the last day of the month following the end of the quarter (April 30, July 31, October 31, January 31).
What happens if I have a credit?
If your credits exceed taxes due in a jurisdiction (you bought more fuel there than you burned), the excess credit carries forward to the next quarter's return. You do not get a check from most states — it offsets future taxes.
Do I need IFTA for a truck that never leaves my state?
If you only operate within one state, you likely file that state's intrastate fuel tax instead of IFTA. IFTA applies to vehicles registered for interstate travel (typically over 26,000 lb GVW or with 3+ axles).
How do I track miles per state?
Your ELD logs record state boundaries automatically in most systems. Paper trip sheets are also accepted if they meet the requirements — the key is consistent, documented mileage per jurisdiction for the quarter.
What is the 2290 form?
Form 2290 is the IRS Heavy Highway Vehicle Use Tax return — a separate federal tax on vehicles over 55,000 lb, filed annually in July. It is not part of IFTA but is often mentioned in the same breath because both apply to heavy trucks. The rates differ and they are paid to different agencies.
Methodology & sources
Tax rates come from the IFTA, Inc. official Tax Rate Matrix (iftach.org) for 3Q2026, retrieved August 2026. Rates are per US gallon of diesel (the "special diesel" column). Where a jurisdiction leaves the rate blank in the official matrix (Oregon), the table says "See ODOT" rather than guessing.
This calculator is a planning tool, not tax advice. Filing requirements, deadlines, and rates change; always verify with your base jurisdiction's IFTA portal before filing.