Colorado Security Deposit Rules for Landlords: The 2026 Cap, Return Deadlines, and Itemization

Security deposits generate more disputes than almost any other part of a tenancy, and Colorado’s rules leave very little room for vague lease language. Here is what changed, and what your deposit clause needs to say to hold up.

The cap: one month’s rent, effective 2026

As of January 1, 2026, Colorado caps a security deposit at no more than one month’s rent (HB25-1249, C.R.S. § 38-12-102.5), down from the prior two-month maximum. A deposit clause set above that figure is asking for more than the statute allows.

The return deadline and itemization requirement

The deposit — minus lawful, itemized deductions — generally has to be returned within a set window after move-out, and any deduction must come with a written, itemized statement (C.R.S. § 38-12-103). “Deductions Landlord deems appropriate,” with no itemization requirement, is exactly the language that turns a routine move-out into a dispute.

What can and can’t be deducted

A landlord can generally deduct for unpaid rent and for damage beyond normal wear and tear — not for the ordinary aging that comes from a tenant simply living in the unit. The distinction between wear and tear and chargeable damage is where most disputes actually happen; see Move-Out & Damage Liability Guide for that side of it.

The penalty for getting it wrong

If a deposit is withheld willfully or wrongfully — without a lawful reason, or without the required written statement — the tenant may be entitled to up to three times the wrongfully withheld amount, plus attorney fees. That penalty is why vague “deemed appropriate” language is a real liability, not just an unclear clause.

What to check in your own lease

• Does the deposit amount exceed one month’s current rent?
• Does the clause require a written, itemized statement for any deduction?
• Does renewal language correctly carry forward an existing deposit rather than treating it as new?
• Does the clause distinguish normal wear and tear from chargeable damage, or leave that undefined?

The bottom line

The deposit cap change makes this one of the highest-priority clauses to check right now. A Deposit Compliance Check reads your deposit language against the current cap, return timeline, and itemization rule, and hands back a corrected clause — not just a flag.

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.