Washington security deposit rules
Washington sets no statutory limit on the size of a security deposit. The deposit must be returned full and specific statement of deductions (with estimates or invoices) and any refund within 30 days after termination of the rental agreement and vacation of the premises, with an itemised list of any deductions. No interest is owed on the deposit under state law.
What the law requires
No statutory limit. Returned Full and specific statement of deductions (with estimates or invoices) and any refund within 30 days after termination of the rental agreement and vacation of the premises. Deposits must be held in a trust account with a written checklist of the unit's condition (RCW 59.18.260, 59.18.270); no deposit may be collected without a written rental agreement. Tenants may pay deposits and last month's rent in installments on request (RCW 59.18.283). 2025 HB 1217 (c. 209) did not cap deposit amounts.
- Deductions: unpaid rent and damage beyond normal wear and tear, itemised in writing. Cleaning and repainting after ordinary use are normal wear in most states.
- Deadline: the 30-day clock usually starts when the tenant moves out and, in many states, when a forwarding address is provided. Missing it typically forfeits the landlord’s right to keep any of the deposit and can add statutory damages.
- Interest: none required under state law. Cities in some no-interest states have their own ordinances, so check the municipal code where you rent.
Move-out checklist
- Give written notice of the move-out date and a forwarding address; many deadlines only start when the landlord has the address.
- Photograph every room after cleaning, with a timestamp. Request a joint inspection where the state allows one.
- If the deadline passes, send a written demand citing RCW 59.18.280. Small-claims court handles deposit disputes in every state and most cap the claim well above a typical deposit.
Related Washington rules
- Late fees: No statutory cap on late fees, but no late fee may be charged for rent paid within five days after the due date; if rent is more than five days late, fees may run from the first day after the due date. In an eviction, a tenant may reinstate the tenancy by paying rent plus late fees of no more than $75 total (RCW 59.18.410). Late fee calculator.
- Notice to end a tenancy: Landlord may not end a month-to-month or periodic tenancy without one of the causes listed in RCW 59.18.650; notice depends on the cause: 90 days for owner or family move-in or sale of a single-family home, 120 days for demolition, substantial rehab or change of use (RCW 59.18.200(2)(c)), 60 days for another legitimate business reason, and 60 days to decline renewal at the end of an initial 6-12 month lease. Tenant: at least 20 days before the end of the rental period (RCW 59.18.200). Notice calculator.
- All rules on one page: Washington landlord and tenant law.
Frequently asked questions
How much can a landlord charge for a security deposit in Washington?
There is no statutory cap in Washington; the market and the lease decide. Deposits must be held in a trust account with a written checklist of the unit's condition (RCW 59.18.260, 59.18.270); no deposit may be collected without a written rental agreement. Tenants may pay deposits and last month's rent in installments on request (RCW 59.18.283). 2025 HB 1217 (c. 209) did not cap deposit amounts.
How long does a landlord have to return a security deposit in Washington?
Full and specific statement of deductions (with estimates or invoices) and any refund within 30 days after termination of the rental agreement and vacation of the premises. The statute is RCW 59.18.280.
Does a Washington landlord have to pay interest on the security deposit?
No. Washington law does not require interest on residential security deposits.