This page provides general legal information and calculation tools, not legal advice. DocketMath is not a law firm and does not provide legal representation, and using this site does not create an attorney-client relationship. Laws change and exceptions apply, so deadlines and amounts specific to your situation should be confirmed with a licensed attorney in your jurisdiction.

Interest in Missouri

In Missouri, the post-judgment interest rate on a money judgment is set by statute at 9% per annum. This rate is established under Mo. Rev. Stat. § 408.040, which governs interest on judgments, and is distinct from the pre-judgment rate found in § 408.020. The 9% figure applies from the date the judgment is entered until it is satisfied, and it is calculated on the total amount of the judgment, including any awarded costs. The official statute at revisor.mo.gov contains the exact rule and any applicable exceptions. The worked example below demonstrates how this rate is applied to a judgment amount over time. For an estimate specific to a case, the DocketMath calculator can compute the total interest owed.

Interest calculation example

For a Missouri this interest calculation, use the verified rate from the current rule packet: 9%. The verified packet cites Mo. Rev. Stat. § 408.040, § 408.020 (https://revisor.mo.gov/main/OneSection.aspx?section=408.040).

Example inputs:

• Principal: $10,000
• Days in calculation period: 365

Calculation:

• Convert the rate to a decimal: 9% = 0.09
• Multiply principal by the rate and the day fraction.
• Example interest: $900.00

This example is generated from verified packet facts. Confirm compounding, judgment date, and case-specific accrual before relying on the amount.

Interest calculation example

For a Missouri this interest calculation, use the verified rate from the current rule packet: 9%. The verified packet cites Mo. Rev. Stat. § 408.040, § 408.020 (https://revisor.mo.gov/main/OneSection.aspx?section=408.040).

Example inputs:

• Principal: $10,000
• Days in calculation period: 365

Calculation:

• Convert the rate to a decimal: 9% = 0.09
• Multiply principal by the rate and the day fraction.
• Example interest: $900.00

This example is generated from verified packet facts. Confirm compounding, judgment date, and case-specific accrual before relying on the amount.

Estimate your own result: every situation has exceptions that can change the outcome. Use the interest calculator to estimate your specific figure.

This page provides general legal information and calculation tools, not legal advice. DocketMath is not a law firm and does not provide legal representation, and using this site does not create an attorney-client relationship. Laws change and exceptions apply, so deadlines and amounts specific to your situation should be confirmed with a licensed attorney in your jurisdiction.