South Dakota Car Loan Laws

South Dakota lets the dealer and buyer agree on the finance charge, makes a creditor wait 30 days after a missed installment, and charges a 4% excise tax.

Updated Oct 26, 2026 By Lenditia Editorial Team 6-minute read Right to cure

In short

In South Dakota, a dealer installment contract may carry whatever finance charge you and the creditor agree to in writing, so there is no rate ceiling; the state's 36% cap on licensed money lenders does not reach these contracts. There is no cure notice, but on a dealer installment contract a creditor may not pursue its remedies until a missed installment is 30 days past due, which leaves you a window to catch up. You pay a 4% motor vehicle excise tax on the price minus your trade-in. The Division of Banking licenses money lenders.

Right to cure: Yes: 30 days past due
Rate ceiling: None on dealer contracts
Doc fee limit: No dollar cap
Vehicle sales tax: 4% excise, minus trade-in

Map of the United States with South Dakota highlighted

South Dakota car-finance rules at a glance

South Dakota Right to cure Right to catch up on missed payments and keep the car Checked Oct 26, 2026

Right to cure: Yes on dealer contracts: no remedies until an installment is 30 days past due; SDCL 54-3A-19, read as a 30-day window to catch up; no notice is required, and direct loans are not covered.
Rate ceiling: No general cap on dealer contracts; licensed money lenders' loans capped at 36%; SDCL 54-3A-3 allows the agreed rate; retail installment contracts are excluded from the 54-4-44 cap.
Doc fee limit: No dollar cap; allowed for services actually rendered
After repossession: Notice before sale; right to redeem; deficiency allowed
Vehicle sales tax: 4% motor vehicle excise tax on price minus trade-in
Regulator: South Dakota Division of Banking

What a South Dakota car contract may charge

Chapter 54-3A of the South Dakota Codified Laws governs consumer installment sales contracts, which includes a car bought on credit from a dealer for personal use. Section 54-3A-3 lets the creditor charge a finance charge at the rate agreed on in a written contract, with no maximum.

The 36% cap does not apply. South Dakota limits licensed money lenders to 36% a year (SDCL 54-4-44), but House Bill 1090, which the Division of Banking explained in a June 2017 memo, excluded retail installment contracts for vehicles from that cap when they comply with chapter 54-3A.
Late charges. A delinquency charge is allowed only if the contract provides for it and may not exceed 5% of the installment or $5, whichever is greater, once per installment (§54-3A-12).
Returned payments. A charge for a returned payment may not exceed $30 per item (§54-3A-12.1).
Overcharges. If a creditor charges more than the law allows, other than by an honest computation error, you may owe none of the principal or charges; you must make a written demand first (§§54-3A-20 to 54-3A-23).

With no ceiling, comparing offers is your main protection. Read the APR on the retail installment contract and test it in the car payment calculator.

Doc fees and the 4% excise tax

South Dakota allows a documentary or document administration fee as part of a vehicle's cash price, for services actually rendered (§54-3A-1). Chapter 54-3A sets no dollar limit on it, so ask for the amount before you negotiate.

South Dakota motor vehicle excise tax, SDCL chapter 32-5B
Rule	What it means for you
Rate	4% of the purchase price, on top of license and registration fees
Trade-in	The trade-in value the seller allows is deducted from the price
Where you pay	The county treasurer where you live, when you title the vehicle
Older cheap cars	Exempt if 11 or more model years old and sold for $2,500 or less

Falling behind and repossession in South Dakota

South Dakota does not require a cure notice before repossession. Chapter 54-3A does build in a waiting period for dealer installment contracts, and because you can bring the account current during it, we count South Dakota as a right-to-cure state for those contracts. Article 9 of the Uniform Commercial Code, codified in title 57A, governs the repossession itself.

Day 10: late notice if a penalty is charged. If an installment is still unpaid on the tenth day after it is due and the creditor imposes a late charge, it must send you a written notice before the next due date (§54-3A-11).
Deferral or refinancing. If the creditor agrees, you may defer the late installment or refinance the balance instead of paying a penalty.
Day 30: remedies open. If the installment is not deferred or refinanced within 30 days after its due date, the creditor may pursue its remedies, including repossession (§54-3A-19).
Peaceful repossession. Without a court order, the creditor may take the car only without a breach of the peace (SDCL 57A-9-609).
Notice, redemption and deficiency. Under Article 9, the creditor must notify you before selling the car, you may redeem it before the sale, and you can owe any shortfall.

Read what to do when you fall behind and our guide to the deficiency balance before the 30 days run out. If you are on active military duty, the federal Servicemembers Civil Relief Act can require a court order before repossession.

Where to check a lender and complain

The Division of Banking in the Department of Labor and Regulation licenses money lenders, including companies that buy and securitize car installment contracts. Banks and credit unions answer to their own regulators. For title loan and payday rules, see Lendmira's South Dakota page.

South Dakota Division of Banking

Licenses money lenders and takes consumer complaints through the Department of Labor and Regulation.

South Dakota Attorney General

Its consumer protection division handles complaints about deceptive dealer practices.

Consumer Financial Protection Bureau

Takes complaints about auto lenders and servicers, including banks and finance companies.

Questions people ask

Is there a maximum interest rate on car loans in South Dakota?

Not on dealer installment contracts: the rate is whatever you agree to in writing. Loans from licensed money lenders are capped at 36% a year.

How soon can my car be repossessed in South Dakota?

On a dealer installment contract, the creditor may pursue its remedies once a missed installment is 30 days past due and has not been deferred or refinanced. Paying it before then keeps the car; there is no separate cure notice.

How much tax do I pay on a car in South Dakota?

A 4% motor vehicle excise tax on the purchase price minus your trade-in, paid to the county treasurer when you title the car.

Does South Dakota cap dealer doc fees?

No dollar cap appears in the installment sales law. A doc fee is allowed in the cash price for services actually rendered.

Sources

Facts on this page were checked against these sources on October 26, 2026.