Statutory Summary: RCW § 59.18.200
Tenant must give 20 days notice before end of monthly cycle. Just cause eviction protections apply.
General Washington Rent Apportionment Precedents
In Washington, the terms outlined in the signed written lease agreement predominantly govern daily rent charges. However, under RCW § 59.18.200, when a tenancy terminates lawfully mid-cycle pursuant to a timely 20-day notice, courts typically favor actual calendar day proration based on the exact days of physical possession.
Official Sample Notice & Proration Settlement Template:
"To: [Landlord / Property Management Name]
Property Address: [Your Full Rental Address]
Please accept this letter as formal written notice pursuant to RCW § 59.18.200 that I will vacate the premises on [Move-Out Date]. As our rental cycle ends on [Cycle End Date], my lawful tenancy for this final period spans exactly [Number of Days] days. Based on our monthly rent of $[Monthly Rent] and our state's calendar apportionment standards, the final prorated rent due is $[Calculated Amount]. Please direct my remaining security deposit of $[Deposit Amount] pursuant to state deposit return statutes within 30 Days to my forwarding address below.
Forwarding Address: [Your New Address]
Tenant Signature: _______________________ Date: ____________"
Legal & Informational Disclaimer:
The statutory summaries, notice durations, and deposit refund deadlines provided for Washington are compiled from public state legislative codes (including RCW § 59.18.200) for general computational reference. Local municipal rent stabilization ordinances (such as city rent control boards) may impose additional local restrictions. This tool provides mathematical rent apportionment and does not constitute formal legal counsel. For specific lease disputes, consult an attorney licensed in Washington or your local legal aid society.