Short summaries of the rules that shape Missouri leases, notices, and deposit papers on LeaseGen.io. Last reviewed 2026-08-15. Not legal advice.
Security deposits
Cap
2× rent
Return clock
30 days after the tenancy ends
A security deposit generally may not exceed two months’ rent (Mo. Rev. Stat. § 535.300). Unused deposit plus an itemized list is generally due within 30 days. Wrongful withholding can cost twice the amount kept.
Missouri does not prescribe a statewide 24-hour entry statute. Put a reasonable-notice entry clause in the lease. Emergency entry is customary.
A Missouri rent increase should be in writing. Many landlords use at least the same notice they would use to end a month-to-month tenancy. A month-to-month tenancy generally takes one month’s written notice (Mo. Rev. Stat. § 441.060). The lease may require more. Local rent-control rules can cap the amount even when the notice period is met.
Missouri landlords usually serve a written demand, then file. There is no single statewide 3-day or 7-day rent notice.
Missouri does not set a uniform pay-or-quit clock. A written demand for rent and possession is the usual first step before an unlawful-detainer or rent-and-possession case (Mo. Rev. Stat. ch. 441, 534, 535).
Pay-or-quit deadline: Varies
Serve the demand, then use the correct court action (rent and possession vs. unlawful detainer).