Colorado Rent Increase & Notice Rules: How Much Warning a Landlord Must Give

In Colorado, two numbers matter most for month-to-month renters. First, a landlord generally cannot raise your rent more than once in any 12-month period for a residential tenancy. Second, to end a month-to-month tenancy, either side must usually give at least 21 days' written notice before the end of a rental period under Colorado's eviction statute (C.R.S. § 13-40-107). On top of that, Colorado law has long banned local rent control (C.R.S. § 38-12-301), so there is no statewide cap on how high the rent can go — only rules about how often and how it is announced. These rules change, and a few details have moved recently, so confirm the current Colorado statute or talk to a Colorado attorney before you rely on any specific figure.

Raising rent on a month-to-month tenancy

Colorado does not set a dollar or percentage limit on rent increases. What it does limit is frequency and warning:

• A landlord may not increase a tenant's rent more than one time during a 12-month period. This applies broadly to residential tenancies, including month-to-month arrangements.
• For a tenancy with no written lease setting the rent (a typical handshake month-to-month), Colorado law requires advance written notice before the higher rent takes effect — commonly described as at least 60 days. Because this notice figure has been the subject of recent legislation, confirm the exact current requirement for your situation.
• A rent increase cannot be used as retaliation (for example, because you requested repairs or reported a code violation) or to discriminate.

If you receive a sudden increase, a second increase within the same year, or one that looks like payback for complaining, that is worth a closer look and possibly a call to legal aid.

Fixed-term leases: rent is usually locked in

If you signed a lease for a set term — say a one-year lease — the landlord generally cannot raise the rent mid-lease. The agreed rent stands until the term ends, unless the lease itself contains a clause that specifically allows an increase during the term. Read your lease carefully:

• A landlord can propose a higher rent for the renewal period, but not change the price in the middle of an active fixed term.
• Watch for clauses tying rent to taxes, utilities, or "market adjustments." If they exist and are valid, they may permit a mid-term change.
• When a fixed-term lease ends and you keep paying month-to-month, the month-to-month notice and once-per-year rules then apply going forward.

Ending a month-to-month tenancy

Colorado spells out termination notice by how long the tenancy has run, in C.R.S. § 13-40-107. For a standard month-to-month tenancy, the figure most renters deal with is 21 days' written notice, given before the end of a rental period. This applies to both sides:

• Landlord ending the tenancy: at least 21 days' written notice for a typical month-to-month tenancy. Longer tenancies can require more — for example, a tenancy of a year or more can require 91 days' notice.
• Tenant moving out: a tenant ending a month-to-month tenancy is generally held to the same 21-day written notice. Giving clear written notice protects your deposit and avoids owing extra rent.
• Colorado has also moved toward "for cause" protections in some situations, meaning a landlord may need a permitted reason to refuse to renew or to end certain tenancies. Whether this applies depends on your circumstances and the current law.

Eviction cases in Colorado — called forcible entry and detainer (FED) actions — are filed in county court. A proper written notice is normally the first step before any court filing, and a defective notice can derail an eviction.

Rent control and local exceptions

Colorado statute preempts local rent control: cities and counties have been barred from capping rents under C.R.S. § 38-12-301. That means:

• There is no statewide rent stabilization and no legal local cap on the amount of an increase.
• Lawmakers have repeatedly debated lifting the ban to let local governments adopt rent stabilization. Because this is an active area, check whether your city or county has gained any new authority before assuming nothing has changed.
• Some Colorado municipalities (for example, home-rule cities) have their own renter ordinances on notice, fees, and source-of-income protections, even though they cannot cap rent. Always check city and county rules in addition to state law.

When to get help

Most rent-increase and notice questions can be answered by reading your lease and the current statute. Consider talking to a Colorado tenant or landlord attorney, or a local legal aid organization, if: you got more than one increase in a year, the notice period looks too short, you suspect retaliation or discrimination, you are facing an FED filing, or your city has special ordinances. A short consultation can prevent a costly mistake.

This is general legal information, not legal advice. Colorado landlord-tenant law changes often and can have city or county exceptions, so verify the current statute or consult a Colorado attorney for your specific situation.