Updated for 2026

Washington Security Deposit Laws & Calculator

Washington state landlords must return your security deposit within 21 calendar days of move-out — along with a detailed written statement of any deductions. Miss that tight deadline and they could owe you twice the withheld amount plus attorney fees. Use our free calculator to see exactly what you're owed.

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Washington State Security Deposit — Quick Facts

Return Deadline
21 Days
Calendar days from move-out
Maximum Deposit
No Statewide Cap
Any agreed amount
Penalty
2× Withheld
Plus attorney fees
Interest Required
✗ No (statewide)
Some cities may require it
Statute
RCW 59.18.280
Small Claims Limit
$10,000
District court
Move-In Checklist Required: Washington law requires landlords to provide tenants with a written move-in checklist describing the condition of the unit. Deductions at move-out can only be made for damage not noted on the original checklist. If your landlord didn't provide one, their ability to deduct is severely limited.

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Enter your deposit amount and move-out date to instantly see your landlord's 21-day deadline and any penalties owed.

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Washington Security Deposit Law — Explained

The 21-Day Return Deadline

Washington's Residential Landlord-Tenant Act (RCW 59.18.280) requires landlords to return the security deposit — or provide a written itemized statement of deductions and any remaining balance — within 21 calendar days of the tenant vacating. This is one of the shorter deadlines in the western US, meaning landlords have less than three weeks from your move-out date to act. Providing your forwarding address in writing on move-out day is essential to ensure timely delivery.

Washington courts have consistently held that the 21-day deadline is strict. Landlords who miss it — even by one day — can be found liable for the double-damage penalty regardless of whether their underlying deductions were legitimate.

Move-In Checklist Requirement

Washington law requires landlords to provide a written move-in checklist detailing the condition of the rental unit at the start of the tenancy. This checklist must be signed by both parties. At move-out, landlords can only deduct for damage that is not noted on the original checklist. If your landlord failed to provide a move-in checklist, they have significantly hampered their ability to make legitimate deductions — document this fact at move-out.

Allowable Deductions

Under RCW 59.18.280, Washington landlords may deduct for unpaid rent, late charges specified in the rental agreement, costs of damage beyond normal wear and tear, and costs to restore items described in the move-in checklist. Normal wear and tear — minor scuffs, small nail holes, routine carpet wear, faded paint — is not deductible. Every deduction must be specifically itemized in the written statement sent within 21 days.

The Double-Damage Penalty

A landlord who wrongfully withholds any portion of a security deposit — or who fails to provide the required written statement within 21 days — is liable to the tenant for twice the amount wrongfully withheld, plus court costs and reasonable attorney fees under RCW 59.18.280. Washington courts apply this penalty broadly: procedural failures alone (missing the deadline, inadequate itemization) can trigger double damages even without overt bad faith.

Small Claims Court in Washington

Washington's small claims division within the district court handles disputes up to $10,000. Filing is straightforward, attorneys are not permitted to represent parties in small claims court (except for appeals), and hearings are typically scheduled within 30–60 days. For most security deposit disputes, small claims is the ideal venue.

What to Do If Your Washington Landlord Is Late

  1. 1
    Locate your move-in checklist Find the checklist your landlord provided at move-in — this is your primary defense against deductions for pre-existing damage. If you never received one, document this.
  2. 2
    Document your move-out thoroughly Take timestamped photos and video of every room. Compare against the move-in checklist to identify any pre-existing conditions that may be incorrectly charged to you.
  3. 3
    Provide your forwarding address in writing Email or text your new address to your landlord on move-out day. Washington's tight 21-day deadline requires prompt action on both sides.
  4. 4
    Mark Day 21 on your calendar If no deposit or written statement arrives by Day 21, the deadline has been missed. Begin the demand process immediately.
  5. 5
    Send a demand letter Use RenterCalc's demand letter generator to cite RCW 59.18.280 and demand the deposit plus double damages within 7 days.
  6. 6
    File in small claims court Washington's small claims limit is $10,000. You can sue for twice the withheld amount plus attorney fees. No attorneys allowed in small claims court, which levels the playing field.

Washington Security Deposit FAQ

How long does a landlord have to return a security deposit in Washington state?
Washington landlords have 21 calendar days after move-out to return the deposit or send a written itemized statement of deductions under RCW 59.18.280. This is one of the shortest deadlines in the country — mark your calendar carefully.
What happens if my Washington landlord didn't provide a move-in checklist?
Washington law requires landlords to provide a written move-in checklist. If they didn't, their ability to make deductions at move-out is severely limited — they cannot claim damage they failed to document at the start of the tenancy. Document the absence of a checklist and raise it in any dispute.
What is the penalty if my Washington landlord keeps my deposit?
Under RCW 59.18.280, wrongful withholding — or failure to send the required statement within 21 days — makes the landlord liable for twice the wrongfully withheld amount plus court costs and attorney fees. Washington courts apply this even for procedural failures like missing the deadline.
Is there a maximum security deposit in Washington state?
Washington state does not set a statewide cap on security deposits. Landlords may charge any reasonable amount agreed upon in the rental agreement. However, some cities and counties may have local limits, so check your municipality's rules.
Does Washington require interest on security deposits?
Washington state does not require landlords to pay interest on security deposits statewide. However, some local ordinances — including certain Seattle regulations — may impose interest requirements. Check your local city or county ordinances if you're renting in a larger city.

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