Seattle Rent Increase Calculator (2026) — Free

Exceed the 7% cap in Seattle and the entire increase is void — tenants recover overpayments. Calculate your legal maximum.

Calculate Your Rent Increase Limits

Monthly Rent ($)

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result

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deadline / notice

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penalty if violated

Penalty Warning

Violating Washington rules in Seattle can result in penalties, voided actions, and tenant lawsuits. Courts consistently side with tenants on procedural technicalities.

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For the full breakdown of rules, deadlines, and procedures, see our Seattle Rent Increase Laws guide.

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How we built this calculator: Rent Increase Calculator rules are based on Washington state statutes (Wash. Rev. Code §59.18.170 et seq. (as amended)). Default rent values come from HUD Fair Market Rents (FY2026) for the Seattle area. Last updated: August 2026. This tool provides general information, not legal advice. Consult a licensed attorney for guidance specific to your situation.

RA

Reviewed by Rachid Abadli

Founder & CEO, LeaseBase · Sacramento landlord · Self-managing since 2019

LeaseBase is a property management platform — not a law firm. Consult an attorney for legal advice specific to your situation.