Washington Security Deposit Law (2026): Deadlines, Interest & Penalties
If you rented in Washington, your landlord has 30 days after you move out to return your security deposit under RCW 59.18.280. The landlord is not required to pay interest on the deposit. Miss the deadline or wrongfully withhold funds, and the penalty can be up to 2x deposit for intentional noncompliance. Use the calculator above to see exactly what you are owed and when it was due.
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Washington Deposit Rules at a Glance
| Return deadline | 30 days after move-out Extended from 21 to 30 days by 2023 legislation |
|---|---|
| Interest on deposit | Not required |
| Separate account required | Yes |
| Deposit limit | No statewide limit (Seattle caps - see city row) |
| Penalty for violations | Up to 2x deposit for intentional noncompliance |
Washington Security Deposit FAQ
How long does a landlord have to return a security deposit in Washington?
In Washington, a landlord must return the security deposit within 30 days after the tenancy ends, under RCW 59.18.280. Note: Extended from 21 to 30 days by 2023 legislation.
Does my landlord owe me interest on my security deposit in Washington?
No. Washington law does not require landlords to pay interest on residential security deposits.
What is the penalty if a landlord misses the deposit deadline in Washington?
Up to 2x deposit for intentional noncompliance. The governing statute is RCW 59.18.280.
Is there a limit on how much a landlord can charge as a security deposit in Washington?
Yes. In Washington, the security deposit is limited to No statewide limit (Seattle caps - see city row).
Does a Washington landlord have to keep my deposit in a separate account?
Yes. Washington law requires landlords to hold security deposits in a separate account, per RCW 59.18.280.
Are there exceptions to the 30-day deposit deadline in Washington?
Yes — the deadline can vary: Extended from 21 to 30 days by 2023 legislation. When in doubt, check the statute itself (RCW 59.18.280) or ask a local tenant-rights organization.
What can I do if my landlord won't return my deposit in Washington?
First, send a written demand letter citing RCW 59.18.280 — our free generator creates one with your amounts filled in. If the landlord still doesn't pay, you can usually file in small claims court, where the penalty exposure is up to 2x deposit for intentional noncompliance.