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Chart showing progression of gas tax increase of 2 cents per gallon each year. The rate for July 1, 2020 to June 30, 2021 is 24 cents per gallon. The table is repeated in the article content.For the fourth consecutive year, South Carolina's Motor Fuel User Fee, which helps support road, bridge, and infrastructure construction in South Carolina, will increase from $0.22 to $0.24 per gallon beginning July 1.

The increase is part of the South Carolina Infrastructure and Economic Development Reform Act ("Act") passed by the General Assembly in 2017, which raises the fee by $0.02 each July until 2022.


Motor Fuel User Fee Rate Changes
Effective DatesFee Per Gallon*
July 1, 2017 – June 30, 2018$0.18
July 1, 2018 – June 30, 2019$0.20
July 1, 2019 – June 30, 2020$0.22
July 1, 2020 – June 30, 2021$0.24
July 1, 2021 – June 30, 2022$0.26
July 1, 2022 and after$0.28

*This number does not include the inspection fee ($0.0025) and the environmental impact fee ($0.005) which have not changed and are still applied to motor fuel.


From July 1, 2017, when the Motor Fuel User Fee first increased, through April 2020, approximately $364 million in increased Motor Fuel User Fee revenues have been deposited into the state Infrastructure Maintenance Trust Fund in order to help support more than $1.3 billion in road and bridge work, according to figures from the South Carolina Department of Transportation.


Motor Fuel Income Tax Credit

South Carolina taxpayers can claim a credit to help offset increases in the Motor Fuel User Fee. The credit equals the lesser of the vehicle maintenance fees paid during the year or what was paid in the increased Motor Fuel User Fees.

Preliminary SCDOR data shows that so far in the 2020 tax season, this credit has been claimed on 65,638 South Carolina returns, with an average credit of $42.41 per return, almost double the average in the 2019 tax season. The available credit cap was increased from $40 million last year to $65 million for the 2020 tax season. So far, $2,783,770 of the available credit for the 2020 tax season has been claimed.


More Information

Review Revenue Ruling 17-6 for more information about the Motor Fuel Income Tax Credit. For more details on the Motor Fuel User Fee and Income Tax Credit, visit

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