South Dakota used car dealer paperwork and sales tax guide
How South Dakota sales tax works on a used-car deal, how trade-ins and dealer fees are treated, and the title forms and notices a South Dakota dealer prints.
Last checked November 14, 2026
This is a plain-language summary of how a used-car deal works out in South Dakota: the sales tax, what happens to a trade-in, how dealer fees are treated, and the paperwork a dealer prints. DMS Apex uses these same rules to work out each South Dakota deal.
South Dakota tax and fees at a glance
| Item | South Dakota |
|---|---|
| State tax | 4% state rate |
| Who pays it | Buyer, at titling or registration |
| Trade-in | Reduces the tax |
| Documentary fee | Part of the taxable amount |
| Service contract | Taxed |
| Starting title fee in DMS Apex | $10 |
How South Dakota sales tax is worked out
South Dakota: the buyer pays the 4% motor vehicle excise tax to the county treasurer at titling on the price less the trade-in, so the amount shown is an estimate and is not added to what is due now. A document fee included in the price and a service contract bought with the vehicle are part of the taxable price. Title fee starts at $10. A vehicle 11 or more model years old sold for $2,500 or less is exempt. A documentary fee stated outside the price is subject to sales tax, not the excise tax.
South Dakota paperwork a dealer prints
DMS Apex prints these documents for a South Dakota deal, all in black and white:
- Buyer's Order
- Buyers Guide
This is general information, not legal or tax advice. South Dakota rules change: confirm current requirements with the South Dakota Department of Revenue.
Common questions
How much is sales tax on a used car in South Dakota?
4% state rate. A trade-in reduces the taxable amount. See the table above and confirm the current rate with the South Dakota Department of Revenue.
Does a trade-in lower the tax in South Dakota?
Yes. In South Dakota the trade-in allowance reduces the amount the tax is figured on.
Is the dealer fee taxed in South Dakota?
Yes. In DMS Apex the documentary fee is part of the taxable amount for South Dakota.
Does DMS Apex print South Dakota dealer forms?
Yes. It prints Buyer's Order, Buyers Guide.
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