South Dakota Gas Tax Calculator

The South Dakota state gas tax is about 30.0¢/gallon. Calculate your total gas tax (state + federal) below.

South Dakota Total Gas Tax Paid
$7.26
State Gas Tax Rate30.0¢/gal
State Tax Amount$0
Federal Tax Amount (18.4¢/gal)$0
Total Tax on This Purchase$0

What is the gas tax in South Dakota?

The South Dakota state gas tax is approximately 30.0 cents per gallon, which is below the rough national average of around 32 cents per gallon. The federal gas tax still adds a flat 18.4 cents per gallon on top, but overall drivers in South Dakota pay less gas tax than the typical US driver.

How much gas tax will I pay in South Dakota?

Use the calculator above to enter how many gallons you're purchasing and see the exact breakdown of South Dakota state tax, federal tax, and total tax on that fill-up.

This is an approximate combined state gas tax rate for estimation purposes — actual rates change periodically and may include additional local taxes not reflected here.

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Frequently Asked Questions

What is the gas tax rate in South Dakota?

The South Dakota state gas tax is approximately 30.0 cents per gallon. Combined with the federal gas tax of 18.4 cents per gallon, use the calculator above to see the total tax on your fill-up.

Is South Dakota's gas tax above or below the national average?

South Dakota's gas tax of about 30.0 cents per gallon is below the rough national average of around 32 cents per gallon, putting South Dakota among the lower gas-tax states.

How much federal gas tax do I pay in South Dakota?

The federal gas tax is a flat 18.4 cents per gallon in every state, including South Dakota. This is added on top of South Dakota's own state gas tax of about 30.0 cents per gallon.

How much tax will I pay on 15 gallons of gas in South Dakota?

On 15 gallons in South Dakota, you'd pay roughly $4.50 in state gas tax and $2.76 in federal gas tax, for a total of about $7.26. Adjust the gallons in the calculator above for your own fill-up.

Why do gas prices vary within South Dakota?

Beyond the state gas tax, local factors like distribution costs, competition among stations, and proximity to refineries or terminals can cause gas prices to vary from city to city within South Dakota, even though the state and federal tax rate stays the same everywhere.

Does South Dakota's gas tax change often?

It depends on state law — some states adjust their gas tax rate periodically based on inflation or fuel price formulas, while others require new legislation to change the rate. Check South Dakota's department of transportation or revenue for the latest updates.

What is gas tax revenue used for in South Dakota?

Gas tax revenue in South Dakota, like most states, primarily funds road and bridge construction and maintenance, with some states also directing a portion toward public transit projects.