Missouri late fee laws for rent: a late fee is not rent in a possession case

What does RSMo 535.020 say about late fees?

The section lets a landlord file a verified statement for unpaid rent with an associate circuit judge once rent is due, payment has been demanded and it has not been made. It adds that the landlord may join a claim in the same action for any other unpaid sums, other than property damages, "regardless of how denominated or defined in the lease," to be paid for any purpose set forth in the lease.

Then the key limit. Those other sums are not considered rent for purposes of the chapter, and a judgment for them does not by itself entitle the landlord to an order for recovery of possession. Put plainly, a late fee in your lease can be claimed in court with the rent, but it cannot be the reason a Missouri judge gives you the keys back.

Example a made-up owner in Kansas City rents a house for $1,250 with a $60 late fee in the lease. The tenant pays the $1,250 after the owner files, but never pays the $60. The owner can ask for the $60 as part of the claim, but the unpaid fee alone does not support an order for possession.

Does Missouri cap the amount?

Sections 535.010, 535.020 and 535.300 name no dollar or percentage ceiling for a late fee. Section 535.010 refers to default "in the payment of the rents at the time or times agreed upon by the parties," which points back to the lease for timing. With no statutory number in these sections, the lease clause and its reasonableness carry the weight, so a modest flat fee is the safer choice.

Can the deposit cover a late fee?

Section 535.300(4) lets a landlord withhold from the security deposit only amounts reasonably necessary for stated reasons, and the first is to remedy a tenant's default in the payment of rent due to the landlord, pursuant to the rental agreement. The deposit is capped at two months' rent under subsection (1), and the landlord has 30 days after the tenancy ends to return it or send an itemized list of damages.

Whether a late fee falls inside that first reason is not spelled out in the text read here, so treat a late fee deduction from a deposit as a question for a Missouri attorney.

What does that mean for how you bill?

• Keep rent and late fees on separate ledger lines from day one.
• State only the unpaid rent as rent in any demand, and list fees as separate sums.
• Expect to collect an unpaid fee as a money claim, not as grounds for possession.
• Write the fee as a flat amount in the lease so there is no argument about the number.

How should a Missouri owner word the demand?

Because a late fee is not rent for the possession chapter, the demand for rent should state the unpaid rent as its own number. A late fee, a utility charge or any other lease sum goes on a separate line labeled as what it is.

That also helps your own accounting. When the tenant pays, apply the payment to rent first, so the part that supports a possession case is cleared before anything else is. If you need to collect the fees, a money claim joined to the rent action is the route the statute names. Ask a Missouri attorney to review your demand form once, and then use it every time.

How DoorKeeping handles it in Missouri

DoorKeeping posts the late fee you approved from your lease as its own line, never blended into the rent balance, and sends the tenant a reminder first. Rent and payments stay in your own bank accounts. DoorKeeping never holds your money and sends a payment only when you approve it. This is general information, not legal advice. Confirm your lease and any demand with your own Missouri attorney.

Sources

1. RSMo 535.020, Procedure to recover possession (Missouri Revisor of Statutes), read Oct 30, 2026
2. RSMo 535.010, If rent be not paid as agreed, landlord may recover possession (Missouri Revisor of Statutes), read Oct 30, 2026
3. RSMo 535.300, Security deposits (Missouri Revisor of Statutes), read Oct 30, 2026

Questions

Is there a maximum late fee in Missouri?

The sections read here, 535.010, 535.020 and 535.300, name no dollar or percentage cap on a late fee.

Can a Missouri landlord evict a tenant for an unpaid late fee alone?

Under 535.020, other sums such as a late fee are not rent for the chapter, and a judgment for them does not by itself entitle the landlord to possession.

Can a Missouri landlord claim a late fee in court?

Section 535.020 lets the landlord join a claim for other unpaid sums, other than property damages, in the unpaid-rent action.