Washington's security deposit framework, codified at RCW 59.18.260 through 59.18.285, is one of the most procedurally demanding in the country. While the state does not cap the deposit amount statewide, it mandates a rigid chain of compliance procedures—from trust accounts to mandatory move-in checklists—that a landlord must follow to retain legal authority to withhold deductions.

1. Deposit Limits

• No Statewide Cap: Washington state law does not impose a maximum dollar amount or percentage of rent for security deposits.
• Local Caps Apply: Several municipalities impose their own restrictions. Most notably, the city of Seattle caps security deposits at one month's rent (under SMC 7.24). Other cities may impose similar local ordinances.
• Non-Refundable Fees: Washington law allows landlords to charge separately identified "non-refundable fees" (such as cleaning fees), but these must be clearly designated as non-refundable in the written rental agreement. If a fee is not explicitly labeled "non-refundable," it is legally considered a refundable deposit.

2. Trust Account Requirement

All security deposits collected from residential tenants in Washington must be deposited in a trust account at a bank, savings and loan association, or licensed escrow company within the state.

• The landlord must provide the tenant with the name and address of the financial institution and the account number where the deposit is being held.
• This information must be given to the tenant in writing at the inception of the tenancy.
• Failure to properly deposit the funds in a trust account can result in the landlord forfeiting the right to retain any portion of the deposit.

3. The Mandatory Move-In Condition Checklist

This is a critical compliance requirement that is unique in its rigidity. Under RCW 59.18.260, a landlord is required to provide a comprehensive written checklist documenting the condition and cleanliness of the property at the time of move-in.

• The checklist must be signed by both the landlord and the tenant.
• Without a properly executed move-in checklist, the landlord has effectively waived their right to make any deductions from the security deposit at the end of the tenancy—even for legitimate property damage.

4. The 30-Day Return Deadline

When the tenant vacates the property, the landlord has exactly 30 days to either:

1. Return the full security deposit to the tenant, or
2. Provide the tenant with a detailed, written itemized statement explaining every deduction, along with a check for the remaining balance.

• The 30-day window begins when the tenancy terminates and the tenant surrenders the premises.
• Permitted Deductions: Unpaid rent, damages beyond normal wear and tear (as documented by the move-in checklist comparison), and unpaid utilities that the tenant was contractually responsible for.
• No Interest Requirement: Unlike some states, Washington law does not require landlords to pay interest on security deposits.

The Severe Penalty for Non-Compliance

If a landlord fails to return the deposit and/or fails to provide a proper itemized statement within the 30-day deadline, the tenant can sue the landlord for up to double the amount of the deposit, plus court costs and reasonable attorney's fees. This penalty also applies if the landlord makes deductions in bad faith (e.g., charging for pre-existing damage that the move-in checklist already documented).

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How Landager Helps

Managing Washington properties requires precision, especially with Seattle's strict security deposit caps and the statewide 30-day return deadline. Landager automates the mandatory move-in checklist process, tracks the 14-day "pay or vacate" notices, and ensures rent increases are delivered with the required 90-day notice. From managing installment payment requests to staying compliant with Just Cause eviction requirements, Landager helps you navigate the complex RCW 59.18 landscape.