Rent increase notice: How much notice is required by state

Key Takeaways

• California requires 30 days' notice for a cumulative rent increase of 10% or less in a 12-month period, and 90 days' notice if the cumulative increase exceeds 10%, under Civil Code §827. The threshold is cumulative across the year, not per individual notice.

• Oregon requires 90 days' notice for any rent increase, with no tiered exception, and separately caps the increase itself at 7% plus CPI annually under its statewide rent control law.

• Mailed notice adds delivery-extension time in states that apply a mailing rule. California adds 5 days under Code of Civil Procedure §1013 when notice is sent by first-class mail rather than delivered in person.

• States without a codified notice-period requirement, including Illinois at the state level, still allow cities to impose their own rule. Chicago requires 30 days regardless of the absence of a statewide Illinois requirement.

• An improperly noticed rent increase, whether too short a notice period or the wrong delivery method, is void and must be restarted from the beginning, not simply corrected going forward.

A property manager sends a rent increase notice 45 days before the effective date, confident that's more than enough lead time. If that property is in Oregon, it isn't. If it's in California and the increase exceeds 10%, it isn't either. The correct notice period is not a general best practice; it is a specific number of days, set by statute, that changes by state and sometimes by the size of the increase itself.

Numetix takes an expert-led, AI-powered, and human-in-the-loop approach to lease compliance calendaring, calculating the correct notice period and effective date for each rent increase against the property's specific state before the notice goes out, not after a tenant challenges it. This guide covers the exact requirements for the states with the clearest statutory rules.

Quick Answer: How much notice is required before a rent increase?

• Most states without a tiered rule require 30 days' notice for a month-to-month rent increase. California requires 30 days for increases of 10% or less and 90 days for increases above that threshold, under Civil Code §827. Oregon requires 90 days for any increase, with no size-based exception.

• The notice period is calculated from the date of delivery, not the date the notice was written. Mailed notice adds extra time in states with a mailing rule; California adds 5 days under CCP §1013.

• An increase that does not meet the required notice period, or that uses an improper delivery method, is void and must be restarted with a new, correctly timed notice, not simply corrected mid-stream.

California: the 30-day and 90-day tiers, and why the threshold is cumulative

California Civil Code §827 sets two notice periods based on the size of the increase: 30 days if the cumulative rent increase over the trailing 12 months is 10% or less, and 90 days if that cumulative total exceeds 10%. The critical detail most PM companies get wrong is that this threshold is cumulative, not per notice. Raising rent 6% in March and another 6% in November crosses the 10% cumulative threshold for the year, which means the second increase requires 90 days' notice even though neither individual increase, viewed alone, appears to cross the line. Tenancy length does not affect which tier applies; the calculation is based solely on the size of the increase, not how long the tenant has lived there.

Oregon: 90 days for any increase, plus a statewide percentage cap

Oregon requires 90 days' notice for any rent increase under ORS 90.323, with no tiered exception based on increase size, and additionally caps the increase itself at 7% plus the Consumer Price Index annually. Oregon also prohibits any rent increase during the first year of a tenancy and limits increases to once every 12 months. A landlord in Oregon planning a rent increase needs to build in the full 90-day lead time regardless of how small the increase is, which is a longer minimum runway than nearly every other state.

Why delivery method changes the effective notice period

The notice period is calculated from the date the tenant actually receives the notice, not the date it was written or mailed. States that apply a mailing rule add extra days to account for delivery time; California adds 5 days under Code of Civil Procedure §1013 when notice is sent by first-class mail rather than hand-delivered or posted. A PM company sending a 30-day notice by mail in California without accounting for this extension has actually given only 25 days of effective notice once the mailing delay is factored in, which can void the notice entirely if challenged.

Local ordinances can require more than the state minimum

State-level notice requirements are a floor, not a ceiling. Cities including San Francisco, New York City, and Washington D.C. layer additional requirements on top of their state's baseline rule, and a PM company operating in one of these cities needs to confirm the local ordinance separately from the state statute. Chicago's 30-day requirement despite Illinois having no statewide rule is a clear example of why the state-level answer alone is not sufficient for portfolios in cities with active local tenant protection ordinances.

Frequently asked questions

Does the rent increase notice period apply to fixed-term leases or only month-to-month?

These statutory notice periods generally apply to increases during a month-to-month tenancy or at the point a lease converts to month-to-month. A rent increase built into a signed fixed-term lease, disclosed and agreed to at signing, is generally not subject to the same mid-tenancy notice requirement, since the tenant already agreed to that specific future increase as a term of the lease itself.

What happens if a landlord sends a rent increase notice with too little notice?

The notice is generally void and must be resent with the full, correct notice period, restarting the clock from the new delivery date rather than being retroactively corrected. If the landlord attempted to enforce the increase before the correctly calculated effective date, the tenant is only obligated to pay the prior rent amount until a properly noticed increase takes effect.

Can a rent increase notice be delivered by email or text message?

This depends on the state and, in many cases, on whether the lease specifically authorizes electronic notice. Several states accept electronic delivery only if the tenant has affirmatively agreed to it in writing, commonly through a clause in the lease itself; absent that agreement, most states still expect written notice delivered by hand, mail, or posting. Confirm the specific state's accepted delivery methods before relying on email or text as the sole method of service.

For property management firms managing rent increases across multiple states, our accounting services calculate the correct notice period and effective date against each property's specific state before the notice goes out, expert-led, AI-powered, and human-in-the-loop.

See the complete guide to property management accounting for the full lease compliance and owner reporting framework.