Everything freelancers and small businesses need to know about charging late fees, interest rates, and collecting overdue invoices in South Dakota.
This information is provided for general educational purposes only and does not constitute legal advice. Laws change frequently. Consult a licensed attorney in South Dakota for advice on your specific situation. Last reviewed: 2026.
Usury laws cap the maximum interest rate that can be charged on overdue payments in South Dakota.
No general usury cap
South Dakota has no general usury cap. Parties may agree to any rate. This is why many credit card companies are headquartered here.
No cap, so exemptions are unnecessary.
Understanding what you can and cannot charge for late payments in South Dakota.
Late fees are allowed when contractually agreed. No usury cap provides maximum flexibility.
No statutory cap.
Standard contract law. Fees must not be unconscionable.
South Dakota Prompt Payment Act sets deadlines and penalties for late payments in South Dakota.
30 days for state contracts.
Interest on late payments.
South Dakota requires state agencies to pay within 30 days. SDCL § 5-26-1.
Certain industries in South Dakota have additional rules around payment timelines, liens, and collection procedures.
Construction: SDCL § 44-9-10 requires mechanics' lien filing within 120 days.
Government contracts: SDCL § 5-26-1 mandates 30-day payment.
Financial services: South Dakota's lack of usury cap has attracted major credit card companies (Citibank, etc.).
Use this compliant wording on your invoices to clearly communicate your late fee policy in accordance with South Dakota law.
Payment is due within 30 days. A late fee of 1.5% per month (18% per annum) will be assessed on unpaid invoices. South Dakota does not impose a usury cap.
This wording works because it clearly states the rate, when it applies, and references South Dakota legal standards. Always ensure your stated rate complies with South Dakota's usury limits.
Practical tips for invoicing within South Dakota's legal framework.
Before you can charge a late fee in South Dakota, your client needs to have agreed to the terms. Include your late fee clause directly on your invoice and in your contract.
South Dakota caps interest rates at No general cap. Charging above this limit can void your right to collect interest entirely and may expose you to penalties.
A reminder 3 days before the due date and a follow-up the day after dramatically reduces late payments. Automated reminders ensure nothing slips through the cracks.
If you ever need to escalate collection efforts in South Dakota, documented reminder history strengthens your position. Automated systems keep logs automatically.
ChaseBot handles the math, the timing, and the follow-ups so you can focus on your work.
Set compliant rates and let ChaseBot handle the math. Never accidentally exceed state limits.
98% open rate. Reminders that actually get seen. Automatic escalation sequences built in.
Stop sending reminders for already-paid invoices. ChaseBot syncs with Xero in real time.
Free tier: 5 invoices/month. No credit card required.
Compare South Dakota's rules with neighboring and commonly referenced states.
Get industry-specific invoice reminder templates and strategies.
ChaseBot automates invoice reminders with built-in compliance tools. Free plan, no credit card, 30-second setup.