How much can a landlord charge for a security deposit in Washington?

No statutory limit (RCW 59.18.260, 59.18.270, 59.18.280).

How long does a landlord have to return a security deposit in Washington?

30 days after the rental agreement ends and the tenant moves out (or 30 days after the landlord learns of abandonment) (RCW 59.18.260, 59.18.270, 59.18.280).

Washington security deposit law

The state rules a landlord in Washington has to follow for a residential security deposit, from RCW 59.18.260, 59.18.270, 59.18.280.

Maximum deposit: No statutory limit.
Deadline to return it: 30 days after the rental agreement ends and the tenant moves out (or 30 days after the landlord learns of abandonment).
Itemized deductions: Full and specific statement of the reasons for keeping any part, with estimates or invoices for damage charges.
Interest on the deposit: Not required by state law (landlord keeps bank interest unless the parties agree otherwise in writing).
Penalty for wrongful withholding: Landlord who misses the deadline owes the full deposit; court may add up to two times the deposit for intentional refusal, plus costs and attorney fees.

Before you keep any part of a deposit

Compare the unit with the move-in inspection and photos. Normal wear and tear is generally not chargeable.
Keep receipts or written estimates for every deduction.
Send the return or the itemized list within the deadline above, to the tenant's forwarding address, and keep proof of mailing.

Working out the last month's rent? The prorated rent calculator does the partial-month math.

Source

Verification status: verified summary. Research date: November 5, 2026. Statute: RCW 59.18.260, 59.18.270, 59.18.280. Source: app.leg.wa.gov.

General information, not legal advice. Cities and counties can add stricter rules, and laws change. Check the current statute or a local attorney before you act.

Other states: Virginia · West Virginia · all states

Last updated November 5, 2026.