South Dakota Sales Tax Calculator
The average combined sales tax rate in South Dakota is 6.11% in 2026 — a 4.2% state rate plus about 1.91% in local taxes. On a $100 purchase that's $6.11 in tax for a $106.11 total. Enter any amount below to add or remove South Dakota sales tax instantly.
$100.00 total
Before tax: $100.00 · Sales tax: $0.00 (0%)
State & average combined rates: Tax Foundation 2026. Local rates vary by city/county — adjust the rate for an exact figure. How we calculate →
South Dakota sales tax rate in 2026
South Dakota's statewide base sales tax rate is 4.2%. On top of that, counties, cities and special districts add local taxes that average about 1.91%, for an average combined rate of 6.11%. These figures come from the Tax Foundation's 2026 state and local sales-tax data.
Because local rates differ from city to city, the auto-filled 6.11% is the population-weighted state average. For an exact figure at a specific address, adjust the rate in the calculator to your local combined rate.
How much is sales tax on a purchase in South Dakota?
At South Dakota's average combined rate of 6.11%, here's the tax and total on common amounts:
$10 → $0.61 tax, $10.61 total · $50 → $3.06 tax, $53.05 total · $100 → $6.11 tax, $106.11 total · $1,000 → $61.10 tax, $1061.10 total.
Enter your own amount in the calculator above for an exact figure, or switch to reverse mode to find the pre-tax price from a total.
How South Dakota sales tax is calculated
Sales tax is the price multiplied by the rate as a decimal. Using South Dakota's 6.11% combined rate, a $100 item is 100 × 0.0611 = $6.11 in tax, for a $106.11 total. To work backwards from a total that already includes tax, divide by one plus the rate — the calculator's Remove tax mode does this in one step.
South Dakota sales tax — frequently asked questions
What is the sales tax in South Dakota?
South Dakota's statewide sales tax rate is 4.2% in 2026. With local taxes, the average combined rate is 6.11%.
How much is sales tax on $100 in South Dakota?
At South Dakota's average combined rate of 6.11%, sales tax on a $100 purchase is $6.11, for a total of $106.11. Enter any amount in the calculator above for an exact figure.
How do I calculate South Dakota sales tax?
Multiply the price by 6.11% as a decimal (0.0611). For example, $50 × 0.0611 = $3.06 tax, for a $53.05 total. The calculator above fills in the rate and does it instantly.
Does South Dakota have local sales taxes?
Yes. On top of the 4.2% state rate, South Dakota localities add an average of about 1.91%, which is why the combined rate averages 6.11% and varies by city and county.
How do I remove sales tax from a total in South Dakota?
Divide the total by one plus the rate. On a $106.11 total at 6.11%, the pre-tax price is $100.00 and the tax was $6.11. Use the “Remove tax” mode above to do this automatically.
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