Security Deposits

Can a landlord increase the deposit after move-in?

Missouri rental guidance and tenant-landlord operational information.
Published February 12, 2026 State-specific rental guidance Update This Question
Reviewed by Tenants & Landlords Editorial Team

This rental guidance was reviewed by the Tenants & Landlords Intelligence Team, specializing in lease agreements, notices, rent disputes, deposits, evictions, and tenant-landlord operational procedures.

Asked 110 days ago · Missouri

Security Deposit Increase After Move-In in Missouri: What Tenants Need to Know

In Missouri, tenants often have questions about security deposits, including whether a landlord can increase the amount after the tenant has already moved in. Understanding Missouri’s specific rules regarding security deposits is essential for tenants to protect their rights and maintain a smooth rental experience.

Can a Landlord Increase the Security Deposit After Move-In?

In Missouri, a landlord generally cannot increase the security deposit amount after the lease term has started unless both parties agree to a new arrangement. Here are some important details to consider:

  • Initial Agreement: The security deposit amount is typically established and agreed upon in the lease or rental agreement before move-in. Once set, this amount remains fixed for the duration of the lease.
  • Lease Terms: If the lease is for a fixed term (e.g., one year), the landlord cannot unilaterally increase the security deposit during that period without the tenant’s consent.
  • Renewals and Extensions: If the tenant and landlord agree to renew or extend the lease, the landlord may request a higher security deposit as part of the new lease terms. However, this must be agreed upon in writing.
  • Month-to-Month Tenancies: For tenants renting on a month-to-month basis, landlords may have somewhat more flexibility to renegotiate terms, including security deposits, but changes usually require proper notice and tenant consent.
Important Missouri Tenant Protections Regarding Security Deposits

Missouri law provides certain protections and rules regarding security deposits that tenants should be aware of:

  • Maximum Security Deposit Amount: Missouri does not place a statutory limit on the amount a landlord can charge for a security deposit, leaving it to be determined by the lease agreement. However, any increase must be agreed upon by the tenant.
  • Written Receipt: Landlords are required to provide written notice of the receipt and terms of a security deposit.
  • Return of Deposit: Upon moving out, landlords must return the security deposit, minus any lawful deductions for damages or unpaid rent, within 30 days.
  • Itemized Deductions: If any amount is withheld, landlords must provide an itemized list of damages and expenses.
Procedures if a Landlord Attempts to Increase the Deposit After Move-In

If a landlord tries to increase a security deposit mid-lease without tenant agreement in Missouri, tenants can take the following steps:

  1. Review the Lease: Confirm the terms regarding security deposits and any clauses about changes during the lease.
  2. Communicate with the Landlord: Politely request clarification and explain that the current lease does not allow for an increase without mutual consent.
  3. Negotiate if Desired: If comfortable, tenants may negotiate changes for lease renewal or adjust terms accordingly.
  4. Seek Assistance: If the landlord insists on an unauthorized increase, tenants can consult local tenant advocacy groups or legal counsel familiar with Missouri landlord-tenant laws.
Best Practices for Tenants Regarding Security Deposits in Missouri

To avoid confusion or disputes about security deposits:

  • Get Everything in Writing: Ensure all deposit terms, including amount, conditions, and refund processes, are clearly stated in the written lease.
  • Document Property Condition: Conduct a thorough move-in inspection with the landlord and keep a copy of the condition report for reference when moving out.
  • Keep Records: Save receipts, communications, and any agreements related to deposits.
  • Understand Your Lease: Carefully read and understand the lease before signing, paying attention to clauses on deposits and changes.
  • Communicate Promptly: Address concerns with the landlord as soon as possible to prevent escalation.

Summary

In Missouri, a landlord cannot unilaterally increase a security deposit after move-in under the terms of an existing lease without the tenant’s written agreement. Any increase generally must be part of a lease renewal or renegotiated agreement. Tenants should know their rights, review lease provisions carefully, and maintain clear communication with landlords regarding deposits. Following these principles helps ensure a fair and lawful rental experience.

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