Maine Rent Increase Laws: Advanced Notice Requirements

Unlike states where 30 days is the standard warning for a rent hike, Maine forces landlords to plan much further ahead. Navigating the 45-day and 75-day tiers is essential to lawfully adjusting your property revenues.

Disclaimer: This guide provides general legal information for educational purposes only and does not constitute legal advice. Always consult a licensed attorney in Maine for advice specific to your situation. Information last verified: March 2026.

Fixed-Term Leases

If a tenant is currently bound by an active, fixed-term lease (e.g., a one-year agreement), the landlord cannot increase the rent during the term of that lease. The monthly rate stated in the contract is locked until the lease naturally expires.

To raise the rent upon renewal, landlords must present the new terms to the tenant prior to the renewal date. If the lease converts to a month-to-month tenancy, the required statutory notice periods immediately apply.

Month-to-Month Tenancy Notices

For "Tenancies at Will" (month-to-month renters with no long-term lease), Maine enforces a dual-tier notice system based entirely on the size of the proposed rent increase.

Increases Under 10%

If a landlord is proposing a rent increase that is less than 10% of the tenant's current base rent, they must provide at least 45 days' advance written notice.

Increases of 10% or Greater

If a landlord proposes to increase the rent by 10% or more, they must provide at least 75 days' advance written notice.

Crucial Caveat: This 10% threshold is cumulative over any 12-month period. A landlord cannot bypass the 75-day requirement by raising the rent by 5% in March and another 6% in September. Because the cumulative annual increase exceeds 10%, that second increase demands 75 days' warning.

Notice Format

Maine law specifies that the written notice must explicitly state:

1. The new total rent amount.
2. The exact effective date of the increase. A text message or an email (unless explicitly agreed to as a legal form of notice in a prior written lease) may not hold up if challenged as improper notice.

Local Rent Control: The Portland Exception

While the state of Maine does not restrict how much a landlord can increase the rent, municipalities are legally allowed to enact their own rent control policies.

The most prominent example is Portland, Maine. Under Portland's municipal Rent Control Ordinance:

• The "Base Rent" is heavily regulated.
• Annual rent increases are strictly capped, usually tied to a fraction of the region's Consumer Price Index (CPI).
• Landlords must register their rental units with the city to legally implement any rent increases.
• Even between tenancies (when a tenant moves out), landlords are limited in how much they can raise the rent for the incoming tenant.

Retaliation Prohibitions

A landlord in Maine cannot legally raise the rent to punish a tenant for exercising their rights. If a landlord increases the rent shortly after a tenant formally requests a repair, files a complaint with a code enforcement officer, or organizes a tenant's union, an eviction court will presume the rent increase was illegal retaliation.

How Landager Helps

Landager’s rent ledger tracks the historical increases for every unit. Because Maine law aggregates increases over a 12-month period, Landager's system will automatically alert you if a planned minor increase pushes the unit over the 10% cumulative limit, prompting you to switch from a 45-day to a 75-day automated notice.

Back to Maine Landlord-Tenant Laws Overview.