How much can my landlord raise my rent in Washington in 2026?

Calculate the proposed percentage

Subtract the current monthly rent from the proposed new rent. Divide the difference by the current rent and multiply by 100. If rent rises from $1,500 to $1,640, the increase is $140; $140 divided by $1,500 is about 9.333%. That is below 9.683%, but it has not yet passed the other rules.

Use recurring charges carefully. Washington's law addresses rent and recurring or periodic charges identified in the rental agreement for use and occupancy. Splitting an increase into a smaller rent change and a new required monthly charge should not be assumed to avoid the limit.

Check the first year and prior increases

A covered landlord may not raise the rent during the first twelve months after the tenancy begins. After the first year, the annual limit applies during a twelve-month period. The tenancy start date and the dates and amounts of recent increases are therefore essential facts.

Do not use the date you moved into a different unit or signed a renewal without checking what event legally started the tenancy. If the history is disputed, collect the original agreement, renewals, rent ledger, and prior notices.

Read any exemption claim

A landlord may claim a statutory exemption, including the rolling twelve-year first-certificate-of-occupancy exemption. When an increase exceeds the ordinary limit under an exemption, the notice must include facts supporting that claim. A bare statement that the property is exempt is not the end of the review.

Ask which exemption applies and what official record supports it. For a building-age claim, the first certificate date and notice date matter. Other exemptions have different ownership or program facts.

Check notice time, form, and delivery

Washington's baseline is generally at least ninety days' prior written notice, and the required state form contains specific information. Seattle generally uses 180 days for housing-cost increases. Tacoma has additional city requirements that RentCap currently keeps out of paid packet checkout while the city notice sequence is reviewed.

The delivery method matters too. RCW 59.12.040 lists personal, substitute-plus-mail, and posting-plus-mail paths. An email or unexplained door drop should not be treated as valid merely because you saw the document. Preserve the envelope, attachments, and the date you received it.

What to do with a questionable notice

Run the facts through the checker and open the official source beside each finding. Write down the issue without changing the landlord's document. Washington law describes a written opportunity to cure an unauthorized amount before certain tenant remedies, so current legal guidance matters if you plan to act.

The free result can generate plain-language next steps and keeps unknown facts visible. It is not a court ruling and RentCap is not a law firm. If the effective date is close, the amount is already being collected, or the tenancy is at risk, contact a qualified Washington lawyer or tenant-assistance provider promptly.

A renter evidence checklist

Gather the current lease, renewals, rent ledger, prior increase notices, the new notice and every attachment, the envelope or delivery message, and any exemption statement. Write down the date and method of actual receipt without marking on the original. If the unit is in Seattle or Tacoma, keep the city form and local program information too.

Separate a clear error from a missing fact. The arithmetic may be confirmed while the certificate date is unknown; the date may be early while the delivery method is disputed. A precise list is more useful to a landlord, tenant counselor, or lawyer than a single conclusion that the entire notice is illegal. It also lets a corrected notice address the real problem.

What a below-cap increase does not prove

An increase of 8% is below the 2026 standard ceiling, but that fact does not establish that it was issued after the first year, that another increase did not already use the available annual room, or that the effective date follows the lease and notice rules. It also does not confirm the required form, service, or city attachment.

Similarly, an increase above 9.683% is a signal to inspect an exemption, not proof that the landlord fabricated one. Read the supporting facts and official record. A covered building-age, program, or other exemption can change the amount path while leaving other notice duties in place.

The clearest renter result lists each finding with its status: amount confirmed, timing early, service unknown, exemption unsupported, or city attachment missing. That structure is more actionable than a single score and reduces the risk of overlooking a strong issue because another part of the notice was correct.