South Carolina IFTA Fuel Tax Rate, 3rd Quarter 2025
South Carolina's IFTA diesel rate for the 3rd quarter of 2025 is $0.2800 per gallon, unchanged from Q2 2025.
South Carolina rate for Q3 2025
Special diesel, Q3 2025
$0.2800
per US gallon, unchanged from Q2 2025
- Diesel tax rate
- $0.2800/gal
- Surcharge
- None listed
- Quarter
- Q3 2025, from Jul 1, 2025
- Change vs last quarter
- unchanged
Notes from the source
Matrix footnote #22 (SOUTH CAROLINA): LNG is measured in Diesel Gallons equivalents of 6.06 pounds of liquefied natural gas and CNG is measured in Gasoline Gallons equivalents of 5.660 pounds of compressed natural gas.
Worked example: the South Carolina 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 South Carolina, and 100 gallons bought there.
South Carolina vs. its neighbors, Q3 2025
| Jurisdiction | Diesel + surcharge | vs. SC |
|---|---|---|
| North Carolina | $0.4030 | +$0.1230 |
| Georgia | $0.3710 | +$0.0910 |
| South Carolina | $0.2800 | — |
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.
South Carolina rate, last 4 quarters
Source: IFTA, Inc. Fuel Tax Rate Matrix, 3rd Quarter 2025 · Effective Jul 1, 2025 · Last verified Sep 28, 2026
IFTA, Inc. publishes the rates each member jurisdiction reports. South Carolina'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.