Idaho Rent Increase Notice Requirements

Idaho's code contains no rent-control statute and no provision capping how much rent may rise or requiring a specific advance notice before an increase. During a fixed-term lease the rent cannot change unless the lease allows it. For a tenancy at will (month-to-month), terms are changed by serving the written notice in Idaho Code 55-208, which requires a period of 'not less than one (1) month' to terminate or alter the tenancy; landlords therefore conventionally give 30 days' written notice of a new rent. A tenant who rejects the increase may give matching notice and move out. (A separate 90-day rule applies only to manufactured-home and floating-home park rents, not ordinary apartments.)

No specific statutory penalty. A landlord who fails to give proper one-month notice under Idaho Code 55-208 cannot enforce the higher rent until valid notice expires; the prior rent remains the lawful amount in the interim.