Everything freelancers and small businesses need to know about charging late fees, interest rates, and collecting overdue invoices in Missouri.
This information is provided for general educational purposes only and does not constitute legal advice. Laws change frequently. Consult a licensed attorney in Missouri for advice on your specific situation. Last reviewed: 2026.
Usury laws cap the maximum interest rate that can be charged on overdue payments in Missouri.
10% per annum
Missouri caps interest at 10% per annum (Mo. Rev. Stat. § 408.030). Default rate is 9%.
Banks, licensed lenders, and business loans over $5,000 are exempt.
Understanding what you can and cannot charge for late payments in Missouri.
Late fees are allowed when contractually agreed. Business loans over $5,000 are exempt from the 10% cap.
No specific cap for exempt business transactions. Otherwise limited to 10%.
Standard liquidated damages test.
Missouri Prompt Payment Act sets deadlines and penalties for late payments in Missouri.
30 days for state contracts.
Interest at 1.5% per month.
Mo. Rev. Stat. § 34.057 requires state agencies to pay within 30 days. Construction has specific provisions.
Certain industries in Missouri have additional rules around payment timelines, liens, and collection procedures.
Construction: Mo. Rev. Stat. § 429.010 requires mechanics' lien filing within 6 months.
Government contracts: Mo. Rev. Stat. § 34.057 mandates 30-day payment with 1.5% monthly interest.
Agriculture: Missouri's farming sector follows standard commercial terms.
Use this compliant wording on your invoices to clearly communicate your late fee policy in accordance with Missouri law.
Payment is due within 30 days. A late fee of 1.5% per month (18% per annum) will be assessed on unpaid invoices. Per Mo. Rev. Stat. § 408.030, business loans over $5,000 are exempt from the 10% cap.
This wording works because it clearly states the rate, when it applies, and references Missouri legal standards. Always ensure your stated rate complies with Missouri's usury limits.
Practical tips for invoicing within Missouri's legal framework.
Before you can charge a late fee in Missouri, your client needs to have agreed to the terms. Include your late fee clause directly on your invoice and in your contract.
Missouri caps interest rates at 10% (statutory). 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 Missouri, documented reminder history strengthens your position. Automated systems keep logs automatically.
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Compare Missouri's rules with neighboring and commonly referenced states.
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