Late Fees on Invoices in South Dakota
What South Dakota contractors and small businesses need to know about charging late fees, interest rates, prompt payment laws, and mechanics lien deadlines.
Max Interest Rate
12% per annum (default legal rate); 18% maximum by contract
Small Claims Limit
$12,000
Small Claims Court (Magistrate Court)
Mechanics Lien Deadline
120 days from the last day of furnishing labor or materials
South Dakota Prompt Payment Act
South Dakota Prompt Payment Act, SDCL § 5-26-1 et seq.
South Dakota requires state agencies to pay within 45 days. Private construction follows contract terms with mechanics lien enforcement under SDCL Chapter 44-9.
Late fee rules for South Dakota invoices
South Dakota allows contractual late fees up to the 18% usury cap. The $12,000 small claims limit covers most trade invoices.
South Dakota's default legal interest rate is 12% per annum. Written contracts may specify up to 18% per annum. Rates above this are usurious.
Important disclaimer
This page provides general information about South Dakota late fee rules. It is not legal advice. Laws change, and your specific situation may have unique factors. For disputes involving significant amounts, consult a licensed attorney in South Dakota.
Demand letters and mechanics liens in South Dakota
South Dakota does not require a demand letter. A pre-lien notice must be sent within 45 days of first furnishing for those without a direct contract.
Mechanics lien deadline: 120 days from the last day of furnishing labor or materials. A lien statement must be filed with the register of deeds.
Sample late fee clause for South Dakota invoices
“Payment is due within the terms specified above. A late fee of 1.5% per month (12% per annum (default legal rate); 18% maximum by contract maximum per South Dakota law) will be applied to all balances remaining unpaid after the due date. Pursuant to South Dakota Codified Laws § 44-9-1 et seq. (Mechanics' Liens), the undersigned reserves all rights to pursue collection including but not limited to mechanics lien filing, small claims action (up to $12,000 in Small Claims Court (Magistrate Court)), and referral to collections.”
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Start Free TrialFrequently asked questions — South Dakota
What is the maximum late fee I can charge on an invoice in South Dakota?▾
In South Dakota, South Dakota's default legal interest rate is 12% per annum. Written contracts may specify up to 18% per annum. Rates above this are usurious. Always disclose late fee terms in your contract or invoice before work begins.
Does South Dakota have a prompt payment act?▾
Yes. South Dakota requires state agencies to pay within 45 days. Private construction follows contract terms with mechanics lien enforcement under SDCL Chapter 44-9.
What is the small claims court limit in South Dakota?▾
The small claims court limit in South Dakota is $12,000. Claims are filed in Small Claims Court (Magistrate Court). You generally do not need an attorney for small claims.
How long do I have to file a mechanics lien in South Dakota?▾
In South Dakota, 120 days from the last day of furnishing labor or materials. A lien statement must be filed with the register of deeds.
Do I need to send a demand letter before filing a lien in South Dakota?▾
South Dakota does not require a demand letter. A pre-lien notice must be sent within 45 days of first furnishing for those without a direct contract.