Short answer: A Washington month to month lease can be ended by the tenant with written notice at least 20 days before the end of a rental period under RCW 59.18.200(1)(a). A landlord cannot end it without a legal reason: under RCW 59.18.650, a periodic tenancy may end only for one of the listed causes, each with its own notice period. Rent increases need 90 days’ written notice and are capped under RCW 59.18.700.
That makes Washington one of the strongest month-to-month states for tenants. A 30-day “we’re not renewing” letter is not a valid way for a Washington landlord to end your tenancy. The landlord has to point to a statutory cause, such as moving in, selling a single-family home, or your own lease violation, and give the notice that cause requires.
Washington month to month lease rules at a glance
| Rule | Washington | Statute |
|---|---|---|
| Tenant’s notice to end | Written, 20 days or more before the end of a month or period | RCW 59.18.200(1)(a) |
| Military tenants | May give less than 20 days with PCS or deployment orders | RCW 59.18.200(1)(b) |
| Landlord ending a periodic tenancy | Only for an enumerated cause | RCW 59.18.650(1)(a), (d) |
| Owner or family move-in; sale of single-family home | At least 90 days’ written notice | RCW 59.18.650(2)(d), (e) |
| Demolition, substantial rehab, change of use | At least 120 days’ written notice | RCW 59.18.200(2)(c) |
| Rent increase notice | At least 90 days in writing (30 days for income-based subsidized rent) | RCW 59.18.140(3) |
| Rent increase cap | None in the first 12 months; then the lesser of 7% plus CPI or 10% per 12 months, unless exempt | RCW 59.18.700(1) |
| Holdover after a lawful notice | Judgment for twice the damages and rent found due | RCW 59.12.170 |
How a periodic tenancy arises in Washington
RCW 59.18.200(1)(a) says that when premises are “rented for an indefinite time, with monthly or other periodic rent reserved,” the arrangement is a tenancy from month to month, or from period to period on which rent is payable. That covers written monthly agreements and oral ones.
It also covers the end of most leases. Under RCW 59.18.650(1)(d), “upon the end date of the tenancy of a specified period, the tenancy becomes a month-to-month tenancy.” So if your one-year lease simply runs out, you generally roll into a month-to-month tenancy that carries the same just-cause protection.
The narrow exceptions at the end of a first lease
Subsection (1)(b) allows one no-cause exit. If your agreement was for six to 12 months at the start and says it continues month to month afterward, the landlord may end it at the end of that initial period without cause, but only with at least 60 days’ written notice served under RCW 59.12.040. Subsection (1)(c) gives a similar 60-day option for agreements of 12 months or more that do not convert to month-to-month, if the tenancy has never been periodic. Once you are actually month-to-month, those doors close.
Just cause: how a landlord can end it
RCW 59.18.650(1)(a) states that a landlord “may not evict a tenant, refuse to continue a tenancy, or end a periodic tenancy except for the causes enumerated in subsection (2).” The main causes and their notice periods in the version effective until January 1, 2028, include:
- Owner or immediate family moving in: at least 90 days’ written notice, and no substantially equivalent unit vacant in the same building (2)(d). If the owner does not live there as a principal residence for at least 60 consecutive days in the 90 days after you leave, bad faith is presumed.
- Sale of a single-family residence: at least 90 days’ written notice (2)(e).
- Shared-housing owner: at least 20 days’ advance written notice to vacate when you share the unit, or access to a kitchen or bathroom, with the owner or lessor (2)(i).
- Condemned or uninhabitable premises: at least 30 days’ notice (2)(h).
- Other good cause: at least 60 days’ written notice before the end of the period, where the cause is a legitimate economic or business reason (2)(m).
Nonpayment, lease violations (10 days to cure) and nuisance or waste (3 days) are also causes. For city-level rules, see the Seattle tenant rights guide.
Giving notice as a tenant
Your notice must be in writing and must arrive “20 days or more, preceding the end of any of the months or periods of tenancy.” It does not need a reason. The deadline is tied to the end of the rental period, so a letter that arrives with 18 days left in the month carries you into the next month.
Service members get an exception. Under RCW 59.18.200(1)(b), a tenant in the armed forces, National Guard or reserves, or that tenant’s spouse or dependent, may give less than 20 days’ written notice if permanent change of station or deployment orders do not allow 20 days.
A worked example with Washington dates
Marisol rents an apartment in Tacoma for $1,650, rent due on the first, month to month since her lease ended last year.
- Her move: she wants out at the end of May. May 31 minus 20 days is May 11, so her written notice must reach the landlord by May 11. If she hands it over on May 14, the tenancy runs through June 30.
- The landlord’s plans: in June, the owner decides his daughter will move in. He must give Marisol at least 90 days’ written notice of the date her possession ends under RCW 59.18.650(2)(d). A notice delivered June 2 cannot set a date earlier than August 31.
- A rent increase instead: if the landlord would rather raise the rent, he needs at least 90 days’ written notice under RCW 59.18.140(3)(a), and the increase must fit the RCW 59.18.700 cap unless an exemption applies.
Our notice deadline calculator can run these counts for your dates.
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Rent increases on a Washington month to month lease
Under RCW 59.18.140(3)(a), a landlord “shall provide a minimum of 90 days’ prior written notice of an increase in the amount of rent to each affected tenant.” For subsidized tenancies with income-based rent, subsection (3)(b) allows 30 days.
The 2025 rent stabilization law added a cap. Under RCW 59.18.700(1)(a), unless an exemption applies, a landlord may not raise rent during the first 12 months of a tenancy, and in any 12-month period may not raise it by more than 7% plus the consumer price index, or 10%, whichever is less. The statute says this applies “regardless of whether the tenancy is month-to-month.” The Department of Commerce publishes the yearly maximum. Exemptions in RCW 59.18.710 include units whose first certificate of occupancy was issued 12 or fewer years before the increase notice, and certain public and nonprofit housing.
Week-to-week and other periods
Washington does not write a separate weekly rule. RCW 59.18.200(1)(a) applies to tenancies “from period to period on which rent is payable,” so a weekly tenant also gives written notice of 20 days or more before the end of a period, which works out to roughly three weeks.
Holdover and double damages
If you stay after a valid notice from either side, the landlord can bring an unlawful detainer case. RCW 59.12.170 directs judgment against a defendant found guilty of unlawful detainer for twice the damages assessed and twice any rent found due. Notices under the unlawful detainer chapter must be served by one of the methods in RCW 59.12.040, such as personal delivery, or leaving a copy with a person of suitable age and mailing another.
Frequently Asked Questions
Can a Washington landlord end a month-to-month just by giving 30 days’ notice?
No. RCW 59.18.650 bars ending a periodic tenancy except for a listed cause, and each cause has its own notice period, such as 90 days for owner move-in or the sale of a single-family home.
Is 20 days’ notice enough if I want to leave mid-month?
Your notice ends the tenancy at the end of a rental period, not mid-period. It must arrive at least 20 days before that period ends.
My landlord gave me 60 days’ notice of a rent increase. Is that valid?
Generally not. RCW 59.18.140(3)(a) requires at least 90 days’ written notice for most tenancies; the 30-day exception covers income-based subsidized rent.
Does the rent cap protect month-to-month tenants in Washington?
Yes, unless your unit is exempt. RCW 59.18.700 says the cap applies whether the tenancy is month-to-month or for a longer or shorter term. Newer buildings within 12 years of their first certificate of occupancy are exempt.
What happens if I’m a renter in the military and get orders?
RCW 59.18.200(1)(b) lets you, your spouse or dependent end the tenancy on less than 20 days’ written notice when permanent change of station or deployment orders do not allow 20 days.
Your next step
If you received a termination notice, look for the specific RCW 59.18.650(2) cause it relies on and check whether the notice period matches that cause. If you are moving, count back 20 days from the last day of your rental period and deliver a dated written notice before then. Plan your deposit return with the Washington security deposit law guide, and compare other states on the month-to-month lease laws by state hub. This page is general information, not legal advice; LSC’s legal aid finder can point you to free help in Washington.