Rent increase notice: how much warning the law requires in 2026

Every rent increase needs written notice, and the period is set by state law. In Washington the notice must now follow a statutory form — get it wrong and the increase is unenforceable.

Published August 2, 2026·4 min read

A rent increase notice is the written notice a landlord must give before charging more rent. Two rules apply everywhere: a fixed-term lease cannot be increased mid-term unless the lease itself says so, and a month-to-month tenancy can only be increased with advance written notice — commonly 30 days, with several states requiring 60 or 90. An increase announced verbally, by text, or with too little notice is simply not owed: the tenant keeps paying the old rent.

How much notice, where

Most states require 30 days' written notice for a month-to-month tenancy, and a growing number require more for larger increases or longer tenancies. Two states deserve close attention in 2026 because they now cap the increase itself:

State	Notice	Cap
Washington	90 days	7% + CPI or 10%, whichever is lower — 9.683% for 2026
California (AB 1482 units)	30 days; 90 days if the increase exceeds 10% (Civ. Code § 827)	5% + regional CPI, max 10%
Most other states	30-60 days	No statewide cap

City ordinances can be stricter than the state rule on both the period and the amount — always check the local layer before setting a date.

Washington: the statutory-form trap

Washington's HB 1217 (2025) brought statewide rent stabilization to most tenancies. The mechanics for 2026:

The cap is 7% plus inflation or 10%, whichever is lower — 9.683% for increases taking effect in 2026. The Department of Commerce publishes the figure each year.
No increase at all during the first 12 months of a tenancy.
90 days' written notice, up from 60.
The notice must use the statutory language. HB 1217 prescribes specific text for rent and fee increase notices, and Commerce publishes the form. A notice that is incomplete or not properly served does not effect the increase — the tenant keeps paying the old rent.

The penalties for charging an unlawful increase are not theoretical: tenants can recover the excess rent paid, damages of up to three months of the unlawful charges, attorney fees, and civil penalties of up to $7,500 per violation. A tenant who receives an increase notice can also terminate the tenancy before the increase takes effect on 20 days' notice.

Exemptions exist — new construction for 12 years from the first certificate of occupancy, owner-occupied duplexes through fourplexes, and qualifying nonprofit and LIHTC affordable housing (RCW 59.18.710) — but the burden of showing an exemption is on the landlord.

California: AB 1482 mechanics

For covered units, AB 1482 caps annual increases at 5% plus the regional CPI, never more than 10%, measured against the lowest rent charged in the preceding 12 months. For increases taking effect August 1, 2026 through July 31, 2027, the regional maximums are 8.7% in Los Angeles and Orange County, 8.2% in San Diego, 8.1% in Riverside and San Bernardino, 8.8% in the core Bay Area counties, and 8.6% elsewhere.

Not every unit is covered: housing with a certificate of occupancy issued within the last 15 years is exempt (a rolling window), as are many single-family homes owned by individuals — but the single-family exemption only applies if the tenant received the required written notice of it. Cities with their own rent control (Los Angeles, San Francisco, and others) apply their stricter local cap instead.

On the notice period, Civil Code § 827 requires 30 days for increases of 10% or less and 90 days above that — which, for a unit covered by AB 1482, means an increase requiring 90-day notice is usually unlawful anyway.

Increases you cannot make at all

Even where no cap applies, two limits are universal:

Retaliation. Raising the rent shortly after a tenant complains about repairs, calls a code inspector, or joins a tenant organization can be treated as retaliatory, and many states presume retaliation within a set window after a protected act. Keep a dated, documented business reason for every increase.
Discrimination. An increase applied because of race, religion, national origin, familial status, disability, or another protected class violates the federal Fair Housing Act regardless of state law. Selective increases are where these claims start — apply consistent criteria across comparable units.

Serve it properly

Follow the same discipline as any tenancy notice: written, dated, stating the new rent and the effective date, served the way your state prescribes, with proof of service kept. An increase that is one day short of the required period fails in full — the old rent applies until a valid notice runs its course.

Our template produces a rent increase notice with the new rent, the effective date, the required notice period checked against the increase size, and a proof-of-service block.

→ Rent increase notice