South Dakota Sales Tax Calculator

Free South Dakota sales tax calculator 2026. 4.50% state + 1.90% local = 6.40% combined. Reverse calc & exemptions. No sign-up.

South Dakota Sales Tax, Explained

Midwest sales tax tends to run on rails: a clear statewide rate, predictable county add-ons, few surprises. South Dakota fits that mold with a 4.50% state rate plus about 1.90% in average local taxes, which is how the typical combined rate gets to 6.40%. Either way, $1,000 at the counter means roughly $64.00 in sales tax.

Two recurring budget lines never carry sales tax in South Dakota: groceries and prescription drugs. Clothing does — every shirt and shoe purchase rings up at the full 6.40% — but between exempt food and exempt medicine, a big share of a typical household's annual spending never touches the 6.40% rate at all.

Where does that put South Dakota nationally? Its 6.40% average combined rate ranks 32nd of the 50 states — below the 50-state average of 6.59% by 0.19 points. For context, the two states whose combined rates sit closest to South Dakota's are Vermont (6.36%) and Connecticut (6.35%).

Where in South Dakota you shop changes the math. Counties and cities layer an average of 1.90% onto the 4.50% state base, and individual jurisdictions run above or below that average. The 6.40% figure is the statewide mean — your actual register rate depends on the address.

Running the numbers is plain multiplication: price × 0.0640 = tax. Take a $500 laptop in South Dakota — $500 × 0.0640 comes to $32.00 in sales tax, bringing the register total to $532.00. The calculator above does this for any amount and any rate override in one step.

South Dakota Sales Tax by the Numbers

South Dakota State Rate

4.50%

South Dakota Avg Local Rate

1.90%

South Dakota Combined Rate

6.40%

Tax on $1,000

$64.00

US Rank (Combined)

#32 of 50

SD Clothing

Taxed

South Dakota Sales Tax: Questions & Answers

How much is sales tax in South Dakota?

South Dakota charges 4.50% at the state level and about 1.90% more on average locally, so most shoppers pay around 6.40%. Ranked 32nd of 50 states, that's below the 6.59% US average.

How do I calculate sales tax in South Dakota?

Price times rate, that's the whole formula. At South Dakota's 6.40% average combined rate, a $100 purchase adds $6.40 in tax and $106.40 at checkout. The calculator above runs the math forward and backward for any amount.

Are groceries taxed in South Dakota?

South Dakota does not tax groceries or prescription drugs. Clothing is the everyday category that doesn't escape — it rings up at the full 6.40% combined rate, along with everything else that isn't food or medicine.

Is South Dakota's sales tax higher or lower than average?

Lower — 6.40% combined versus the 6.59% national average, a 0.19-point gap. South Dakota ranks 32nd of 50 states.

Do I need my exact city's rate in South Dakota?

For precision, yes. Local taxes average 1.90% over the 4.50% state base, but jurisdictions sit on both sides of that mean — the calculator above lets you override the rate with your exact local figure.

Does South Dakota charge sales tax on online purchases?

Yes. Following the 2018 South Dakota v. Wayfair Supreme Court ruling, online retailers must collect South Dakota sales tax on purchases shipped to South Dakota residents. The rate is based on the buyer's location within South Dakota, including any applicable local portion.

Nearby State Sales Tax Calculators

All 50 States North Dakota (6.85%)Minnesota (7.49%)Iowa (6.94%)Nebraska (6.95%)Wyoming (5.36%)

Rachel MitchellCPA

Lead Tax Analyst & Editorial Director, TheTaxCalc

Rachel Mitchell is a Certified Public Accountant (CPA) licensed in Illinois with over 12 years of experience in individual and small-business taxation. She specializes in federal and state income tax compliance, FICA optimization, payroll tax strategy, and multi-state tax planning. Rachel holds an MS in Taxation from Golden Gate University and a BS in Accounting from the University of Illinois Urbana-Champaign. She is an active member of the American Institute of Certified Public Accountants (AICPA) and the Illinois CPA Society. Before joining TheTaxCalc, Rachel spent 8 years at a Big Four accounting firm advising high-net-worth clients on tax-efficient wealth strategies.

Reviewed: January 2026Tax data verified against IRS Publication 15-T & state revenue departments