Sue Landlord for Security Deposit Missouri Small Claims

Your lease ended, you moved out, and the landlord either kept your entire deposit or sent a deduction list that makes no sense. In Missouri, you do not have to accept it. RSMo § 535.300 gives tenants real teeth — including the possibility of recovering double what was wrongfully withheld.

The 30-Day Rule

Under RSMo § 535.300, a Missouri landlord has 30 days after the date the tenancy terminates to do one of two things: return the full security deposit, or provide an itemized written statement of deductions along with whatever balance remains.

If the landlord does neither within 30 days, they are considered to have wrongfully withheld the deposit.

The 30-day period runs from the date the tenancy terminates. Give the landlord a forwarding address and document when you surrender the unit so you can track compliance and receive any notice.

Double Damages

Here is why landlords should take the 30-day deadline seriously. Under § 535.300, if a landlord wrongfully withholds all or part of the deposit, the tenant can recover twice the amount wrongfully withheld, plus court costs. So a $2,000 deposit wrongfully kept in full becomes a $4,000 claim.

To qualify for double damages, you need to show that the landlord failed to return the deposit or provide proper itemization within the 30-day window, and that the withholding was not justified. "Wrongful withholding" is the statutory language — it covers both the landlord who kept everything without explanation and the landlord who deducted for normal wear and tear.

Note the $5,000 small claims cap. If double damages on your deposit would exceed $5,000, you either waive the excess (file for $5,000 and give up the rest) or file in the regular Associate Circuit Court.

What Counts as a Legitimate Deduction

Landlords can deduct for damage beyond normal wear and tear. A hole punched in the wall — deductible. Faded paint from three years of sunlight — that is wear and tear, not damage.

They can also deduct for unpaid rent. But every deduction must be itemized in writing and mailed to your forwarding address within the 30-day window. Vague line items ("cleaning — $500") without specifics are vulnerable to challenge.

Missouri caps the initial deposit itself at two months' rent (§ 535.300). If your landlord collected more than that, the excess was unlawful from day one.

Filing the Claim

Step 1: Demand letter. Send a certified letter demanding the deposit (or the improperly deducted portion) within 10 to 14 business days. Cite RSMo § 535.300 and mention double damages. A written demand documents your request; any prejudgment-interest claim must separately qualify under RSMo § 408.020.

Step 2: Identify the defendant. If the landlord is an individual, name them personally. If a company owns the property, search the Missouri Secretary of State database for the correct legal entity name and registered agent address. "The management company" or "the landlord's LLC" is not a legal name — you need the exact one.

Step 3: File form SC40 at the Associate Circuit Clerk in the county where the rental property is located (or where the landlord resides). Claim the deposit amount times two if the 30-day period lapsed without compliance. Base filing fees run from $20.50 to $45 depending on the county, plus the surcharge where charged.

Step 4: Serve the landlord. Certified mail ($10–$15) or sheriff service ($46). For an LLC, serve the registered agent.

Evidence to Bring

At the hearing, the judge will want to see:

• Your signed lease (showing the deposit amount and move-in date)
• Written proof that you surrendered the unit and provided a forwarding address
• Any communication from the landlord about the deposit (or proof of no communication)
• Photos of the unit at move-out (timestamp matters)
• The demand letter and the certified mail return receipt

Organize everything in three identical sets — one for the judge, one for the landlord, one for yourself.

Our Missouri Small Claims Filing Guide walks through the entire process with a demand letter worksheet, a service tracker, and an evidence organizer built for security deposit cases.

See more Missouri guides →