Mississippi IFTA Fuel Tax Rate, 4th Quarter 2025
Mississippi's IFTA diesel rate for the 4th quarter of 2025 is $0.2100 per gallon, unchanged from Q3 2025.
Mississippi rate for Q4 2025
Special diesel, Q4 2025
$0.2100
per US gallon, unchanged from Q3 2025
- Diesel tax rate
- $0.2100/gal
- Surcharge
- None listed
- Quarter
- Q4 2025, from Oct 1, 2025
- Change vs last quarter
- unchanged
Notes from the source
Matrix footnote #2 (MISSISSIPPI): LNG is taxed per Diesel Gallon Equivalent beginning July 1, 2015. The tax rate was set by the 2014 Legislative Session to be taxed at $.18 per Diesel Gallon Equivalent. A Diesel Gallon Equivalent of LNG is measured at 6.06 lbs. CNG is sold to consumers on the Gasoline Gallon Equivalent of 5.660 lbs. However, the tax rate is still on the measurement of $.18 cents per hundred cubic foot. The above tax rate converts CCF to GGE.
Worked example: the Mississippi line of your IFTA return
Change the numbers to match your quarter. Prefilled with 10,000 total miles on 1,550 gallons, 1,200 of those miles in Mississippi, and 100 gallons bought there.
Mississippi vs. its neighbors, Q4 2025
| Jurisdiction | Diesel + surcharge | vs. MS |
|---|---|---|
| Alabama | $0.3100 | +$0.1000 |
| Arkansas | $0.2850 | +$0.0750 |
| Tennessee | $0.2700 | +$0.0600 |
| Mississippi | $0.2100 | — |
| Louisiana | $0.2000 | −$0.0100 |
On an IFTA return, a higher rate doesn't mean you pay more overall. Fuel you buy in a high-rate state earns a bigger credit. What matters is where you burn the fuel versus where you buy it.
Mississippi rate, last 4 quarters
Source: IFTA, Inc. Fuel Tax Rate Matrix, 4th Quarter 2025 · Effective Oct 1, 2025 · Last verified Sep 28, 2026
IFTA, Inc. publishes the rates each member jurisdiction reports. Mississippi's tax agency is the final word on its rate.
Estimates for planning. Confirm with your tax pro or your base jurisdiction's IFTA office before filing.