## US-MO interest rules

This source-backed guide covers US-MO interest authority (Mo. Rev. Stat. § 408.040, § 408.020). It certifies only the quoted source-backed rules below; related interest categories remain outside this page unless they are expressly listed in the receipt.

## Mo. Rev. Stat. § 408.040, § 408.020

US-MO interest controlling authority under Mo. Rev. Stat. § 408.040, § 408.020.

> **408.040.** Missouri Revisor of Statutes - Revised Statutes of Missouri, RSMo Section 408.040 &emsp;☰&emsp;Revisor of Missouri Constitution Committee Publications Other Links Help / FAQ Appendices and Tables Words Section &thinsp; &thinsp; None Or And Not Near &thinsp; Do search Help &thinsp; This chapter only Title XXVI TRADE AND COMMERCE Chapter 408 < > • Effective - 15 Jan 2015, 2 histories , see footnote 408.040. Interest on judgments, how regulated — prejudgment interest allowed when, procedure. — 1. Judgments shall accru

## Use the calculator

DocketMath's interest calculator can model interest scenarios once you identify the controlling jurisdiction, amount, rate type, and accrual date. Use the source panel for the verified source-backed rule.

[Open the Interest calculator](/tools/interest)

## Sources

- [408.040 — Mo. Rev. Stat. § 408.040, § 408.020](https://revisor.mo.gov/main/OneSection.aspx?section=408.040)

All sources are official primary law published by `revisor.mo.gov`.

**Corroboration method:** government_primary_source_direct_fetch.


DocketMath’s Judgment Interest Calculator (Missouri) helps you estimate interest on a Missouri judgment under the state’s general post-judgment framewor...

Judgment Interest Calculator Guide for Missouri

ANO-831 fabrication sweep 2026-04-24: removed 6 fabrications — § 442.200 escrow misclassification, § 408.030 judgment-accrual fabrication, § 408.030 monthly-compounding fabrication, § 408.020(2) consumer-goods 18% cap fabrication, § 408.080 12% judgment-cap fabrication, Fed Funds vs. 52-week T-bill error. Stale § 408.020 6% contractual rate updated to 9%. § 535.300 fabricated interest rate cleared.

A civil action may be brought by a participant or beneficiary...

Interest shall be allowed on any money judgment in a civil case recovered in a district court... calculated... at a rate equal to the weekly average 1-year constant maturity Treasury yield...

Interest shall be allowed on all money due upon any judgment or order of any court from the day of rendering the same until satisfaction be made... at the rate of nine percent per annum, except in tort actions, where the rate is the higher of nine percent or the federally established rate for fifty-two-week treasury bills plus five percent.

In tort actions, interest shall be allowed... at a rate per annum equal to the intended Federal Funds Rate, as established by the Federal Reserve Board, plus five percent, but in no event shall the rate exceed nine percent.

Creditors shall be allowed to receive nine percent per annum, when no other rate is agreed upon, for all moneys after they become due and payable, on written contracts, and on accounts after they become due and demand of payment is made...

Creditors shall be allowed to receive nine percent per annum, when no other rate is agreed upon...

A landlord may not demand a security deposit in excess of two months' rent... Within thirty days after the date of termination of the tenancy, the landlord shall return the full amount of the security deposit...

Interest shall be allowed on all money due upon any judgment or order of any court...

interest in US-MO is governed by Mo. Rev. Stat. § 408.040, § 408.020.