Security Deposits

Can a landlord increase the deposit after move-in?

Washington rental guidance and tenant-landlord operational information.
Published May 7, 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 26 days ago · Washington

Washington Tenant Rights: Can a Landlord Increase the Security Deposit After Move-In?

In Washington, security deposits play a critical role in the landlord-tenant relationship by protecting landlords against damages or unpaid rent, while also safeguarding tenants’ paid funds. Understanding the rules around security deposits, especially whether a landlord can increase a deposit after a tenant has already moved in, is essential for tenants to protect their rights and plan their finances.

Initial Security Deposit Requirements in Washington

Under Washington state law, security deposits are regulated to ensure fairness and transparency between landlords and tenants. At the beginning of a tenancy, landlords commonly require a security deposit, which is usually outlined in the rental agreement.

  • Deposit limit: Washington law does not cap the amount a landlord can request as a security deposit; however, it is generally customary for the deposit to equal one month’s rent.
  • Written agreement: The amount of the deposit and the terms of its use should be clearly stated in the lease or rental agreement.
  • Receipt and documentation: Landlords must provide a receipt for the security deposit and, if requested, documentation such as the condition checklist of the unit.

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

The central question is whether a landlord in Washington can raise the security deposit after move-in. The answer depends largely on the terms written in the lease and the nature of tenancy:

Fixed-Term Lease Agreements

Most fixed-term leases (e.g., six months, one year) specify the security deposit amount at the lease start.

  • No automatic increase: The landlord cannot unilaterally demand an increased security deposit during the fixed term if the lease is silent on such provisions.
  • Lease amendment required: To increase the deposit, the landlord would need the tenant’s written consent to modify the lease terms, which typically involves signing an addendum or new lease.
  • Tenant’s discretion: Tenants are not obligated to agree to an increased deposit mid-lease.

Month-to-Month Tenancies

For month-to-month or periodic tenancies, the landlord has more flexibility to modify terms with proper notice.

  • Proper advance notice: Washington law requires landlords to provide at least 30 days’ written notice before changing rental terms such as rent or deposit amounts.
  • Deposit increase possible: A landlord may request an increased security deposit with appropriate notice before the next rental period starts.
  • Tenant options: Tenants can accept the increase, negotiate, or choose to terminate the tenancy.

Important Points for Tenants Regarding Deposit Increases

  • No retroactive increases: Landlords cannot demand an increased deposit for the current rental period without notice or proper agreement.
  • Rental agreement controls: The lease terms guide what can be required regarding deposits. Review your lease carefully to understand if increases are allowed.
  • Written documentation: Always request any deposit increase be put in writing and reflected as an official lease amendment or addendum.
  • Separate from rent increases: Deposit increases and rent increases are different issues; both may require notice but have different rules.
  • Deposit refunds and deductions: At the end of tenancy, landlords must return security deposits minus any lawful deductions within 21 days, regardless of any prior increase.

Actions Tenants Can Take If Facing a Deposit Increase

If a landlord notifies you of a security deposit increase after move-in, consider these steps:

  • Review lease terms: Check if your lease allows deposit increases during the term or under month-to-month tenancy.
  • Ask for written notice: Request all deposit increase notices be in writing with clear explanations.
  • Know your rights to refuse: If you are in a fixed-term lease, you may refuse an increase unless you agree in writing.
  • Negotiate: Discuss with your landlord if the increase is burdensome or unreasonable.
  • Seek advice: Washington tenants can contact local tenant advocacy groups or legal aid organizations to understand their rights and get assistance.

Summary

In Washington, a landlord generally cannot increase the security deposit after move-in during a fixed-term lease unless the tenant agrees to a lease modification in writing. For month-to-month tenancies, landlords can increase the deposit with proper 30-day written notice before the next rental period. Tenants should carefully review their lease agreements, require written documentation, and understand their rights to negotiate or refuse unlawful increases. Protecting yourself with knowledge and clear communication ensures a fair and transparent landlord-tenant relationship regarding security deposits.


If you need further clarification or assistance with your lease or security deposit issues, consider reaching out to the Washington State Attorney General’s Office or local tenant support organizations.

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