ORS § 90 § 90.160
Calculation of periods or notices.
Operative Text
Notwithstanding ORCP 10: (1) For references in this chapter to periods or notices based on a number of days, those days must be calculated by consecutive calendar days, not including the initial day of service, but including the last day until 11:59 p.m. (2) For references in this chapter to periods or notices based on a number of hours, those hours must be calculated in consecutive clock hours, beginning: (a) Immediately upon service, except as provided in paragraph (b) of this subsection; or (b) For notices to terminate a tenancy, at 11:59 p.m. the day that: (A) A notice given under ORS 90.155 (1)(c) is both mailed and attached to the premises; or (B) A notice given under ORS 90.155 (5) is both mailed and sent by electronic mail.
Oregon Revised Statutes § 90.160 establishes how to count time periods and notice deadlines under Oregon's residential landlord-tenant law, overriding the general court rule (ORCP 10). When a notice period is measured in days, counting begins the day after service and runs through 11:59 p.m. on the final day. When a period is measured in hours, the clock generally starts the moment service occurs, except for tenancy-termination notices delivered by mail-and-post or mail-and-email, where the hourly count begins at 11:59 p.m. on the day both delivery methods are completed.
Plain English — not legal advice.
Property owners and managers operating under ORS § 90.160 generally track notice periods carefully, starting the day-count on the calendar day after service and confirming that the period runs to 11:59 p.m. on the last day. For hour-based notices, compliant operators note the exact time of service, and for termination notices sent by the combined mail-and-post or mail-and-email methods described in ORS 90.155, they begin the hourly count at 11:59 p.m. on the day both steps are completed. Keeping dated records of every delivery method used helps demonstrate that the correct calculation was applied.
General guidance for property managers — not legal advice for your specific situation. Consult an attorney for advice on your case.
Under ORS § 90.160, tenants have the right to the full notice period the law requires, calculated precisely — day-based periods exclude the day of service and extend to 11:59 p.m. on the final day, while hour-based periods follow specific start-time rules depending on how the notice was delivered. If a landlord acts before the period has fully elapsed under § 90.160's counting method, that timing issue may be relevant to any dispute or proceeding. Tenants who believe a notice period was cut short can consult a local tenant-rights organization or Oregon's courts self-help resources to understand the options available to them.
General guidance for tenants — not legal advice for your specific situation. Consult a tenant-rights organization or attorney for advice on your case.
Generated October 7, 2026 — auto-generated, not yet human-reviewed. See /transparency for methodology.
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