How Much Notice Colorado Law Actually Requires for a Rent Increase

The renewal pillar covers the once-every-12-months frequency cap. Notice is a separate question, and it’s where a lot of lease language gets it backwards — the answer depends on whether a written lease exists, and generic templates often apply the wrong standard to the wrong situation.

If there’s no written lease: 60 days, in writing

For a tenancy with no written rental agreement, Colorado law requires 60 days’ written notice before a rent increase takes effect. This applies to purely oral or month-to-month-by-default arrangements without a signed lease governing the terms.

If there’s a written lease: the lease governs

Once there’s a written lease, the statute doesn’t impose its own fixed notice period — the lease’s own terms control how much notice is required for a rent increase. There’s no statutory day-count that automatically applies on top of a written agreement. That doesn’t mean anything goes: courts and the statute’s general framing still expect a reasonable notice period, and a lease that’s silent on rent-increase notice, or that specifies something clearly unreasonable, is a weak position either way.

The mistake this creates

A lot of generic lease templates import a flat “30 days’ notice for any change” clause, or apply the 60-day oral-agreement standard to every tenancy regardless of whether a written lease exists. Both are backwards from what the statute actually does: it sets a floor for the no-written-lease case and defers to the lease for everything else. A written lease that’s silent on notice, or that copies a notice period from an unrelated context, is missing the piece that actually controls here.

What’s separate from this: the 12-month frequency rule

However much notice is required, it doesn’t change the separate rule that rent can only be raised once every 12 months. Getting the notice period right doesn’t excuse raising rent more often than the frequency cap allows, and vice versa — these are two different requirements that both have to be satisfied.

What to check in your own lease

• Does your written lease actually specify a rent-increase notice period, or is it silent?
• If specified, is the notice period something a court would call reasonable, not just administratively convenient for you?
• For any tenancy without a signed written lease, does your process build in the full 60 days?
• Is the notice period tracked separately from the 12-month frequency rule, not conflated with it?

The bottom line

This is one of the more commonly conflated rules in a Colorado lease — treating a written lease like it needs the same 60-day standard as an oral one, or vice versa. A Renewal Compliance Check reviews your actual notice language against which standard applies to your tenancy.

LeaseCheck for Landlords is an educational lease-compliance screening tool. It is not a law firm and does not provide legal advice. Colorado rental laws change; confirm specifics for your situation with a licensed attorney.