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

Under RCW 59.18.280, a Washington landlord has 30 days to return the deposit and provide any required written itemization of deductions.

Do I have to sue to get my security deposit back?

Usually not. Most landlords pay once they receive a formal written demand sent by certified mail that cites the statute and the penalties for withholding. Small claims court is the fallback if they ignore it.

Washington security deposit law

What your landlord is legally required to do after you move out, how long they have, and what it costs them if they get it wrong.

Deadline to return

30 days

Governing statute

RCW 59.18.280

The deadline

Under RCW 59.18.280, a landlord in Washington must return your security deposit — together with any required written itemization of deductions — within 30 days. Once that window closes without payment or a proper itemization, the landlord is in violation of the statute.

The deadline moved from 21 to 30 days by 2023 c 331 s 4.

What it costs your landlord

Under RCW 59.18.280, a landlord who wrongfully withholds a deposit in Washington may be liable for up to twice the deposit where the refusal was intentional, plus costs and reasonable attorney's fees to the prevailing party. That exposure is the reason a formal demand letter works: it is usually cheaper for a landlord to pay you than to argue about it.

How to get your deposit back in Washington

1. Confirm the deadline has passed. Count from the day you moved out and returned possession. In Washington that's 30 days.
2. Put your forwarding address in writing. In several states a landlord has no obligation until they have it, and having sent it protects your claim.
3. Gather your evidence. The lease, proof you paid the deposit, move-in and move-out photos, and any itemization they sent.
4. Send a written demand by certified mail. Cite RCW 59.18.280, state the amount owed, and give a deadline to pay. Certified mail creates the delivery record a judge will want to see.
5. File in small claims if they ignore you.You don't need a lawyer. File in the county where the property is located.

Generate your Washington demand letter — free

Answer a few questions and get a formal letter citing RCW 59.18.280, the deadline your landlord missed, and the penalty they now face. Free to generate and download.

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Common questions

How long does a landlord have to return a security deposit in Washington?: Under RCW 59.18.280, a Washington landlord has 30 days to return the deposit and provide any required written itemization of deductions.
What is the penalty if my landlord keeps my deposit in Washington?: Under RCW 59.18.280, a landlord who wrongfully withholds may be liable for up to twice the deposit where the refusal was intentional, plus costs and reasonable attorney's fees to the prevailing party.
Do I have to sue to get my security deposit back?: Usually not. Most landlords pay once they receive a formal written demand sent by certified mail that cites the statute and the penalties for withholding. Small claims court is the fallback if they ignore it.

Statute text verified against the published source on July 29, 2026. Laws change — confirm the current text before relying on it. This page is general information, not legal advice.