Connecticut Security Deposit Laws: Limits, Interest, and Return Deadlines

Connecticut security deposit laws cap most residential deposits at two months’ rent, require landlords to hold the money in an interest-bearing escrow account at a Connecticut bank, and give the landlord 21 days after you move out (or 15 days after you provide a forwarding address, whichever is later) to return the deposit with an itemized statement of any deductions. Miss a step on either side and real money is on the line: a landlord who violates the return rules owes double the full deposit.

How Much a Landlord Can Charge

If you’re under 62, the maximum security deposit is two months’ rent.¹ If you’re 62 or older, the cap drops to one month’s rent. The age-based discount is automatic. It doesn’t depend on credit history, lease terms, or anything the landlord asks you to sign.

A separate pet deposit is allowed if you have a dog, cat, bird, or aquarium. That pet-specific portion must be returned once you give the landlord a signed written statement that you no longer have the pet, following the same return rules that apply at the end of a tenancy.²

Where Your Deposit Has to Sit

Your landlord cannot drop your deposit into a personal checking account. State law requires it to go into an escrow account at a financial institution located in Connecticut. The money stays your property throughout the lease and is protected from the landlord’s creditors; even if the landlord is sued or files bankruptcy, your deposit cannot be seized to pay the landlord’s debts.¹

The account has to earn interest, and the landlord has to pay that interest to you every year. The Banking Commissioner sets the rate annually based on a statewide deposit index. For 2026, the rate is 0.49%.³ On a $3,000 deposit, that’s roughly $14.70 a year. Small amount, serious consequences for skipping it.

The 30-Day Written Notice

Within 30 days of receiving your deposit, your landlord must give you a written notice stating the amount being held and identifying the bank by name and address.¹ If that notice never arrives, send a written request (email or letter) asking for the account information and keep a copy. That paper trail becomes evidence later if you need to challenge deductions or pursue penalties.

What Landlords Can and Cannot Deduct

Legitimate deductions cover damage caused by your failure to meet the lease: holes in walls, broken fixtures, carpets stained beyond normal use, unpaid rent, and utility charges you were responsible for.⁴

What landlords cannot charge you for is ordinary wear and tear. Paint that fades over a long tenancy, carpet that thins from regular foot traffic, minor scuffs on hardwood: those are the predictable results of someone living in a home, and the cost falls on the landlord. The line between damage and wear isn’t always obvious, which is why documentation matters so much. Dated photos or video of every room at move-in and move-out, taken with good lighting, are the single best thing you can do to protect yourself.

Landlords also have a separate duty to keep the property habitable, which includes complying with building and housing codes, making necessary repairs, and maintaining common areas.⁵ You cannot be billed out of your deposit for fixing something the landlord was supposed to maintain in the first place.

Return Deadline and the Forwarding Address

As soon as your tenancy ends, send your landlord written notice of your new forwarding address. From that point, the landlord has either 21 days from the end of the tenancy or 15 days from receiving your forwarding address, whichever is later, to deliver one of two things: the full deposit plus accrued interest, or the remaining balance after legitimate deductions along with a written statement listing each deduction by type and dollar amount.²

The itemized statement isn’t a courtesy. It’s a statutory requirement. A landlord who withholds $800 for “damages” without explaining what was damaged and what each repair cost has violated the law, even if the underlying deductions would have been reasonable.

A common tenant mistake is moving out without providing a forwarding address in writing. Without that written notice, the 15-day clock never starts, and the only deadline is the 21-day window from the end of the lease. Sending your forwarding address by certified mail or email with a read receipt removes any ambiguity about when the landlord received it.

Penalties When the Landlord Doesn’t Comply

Any landlord who violates the return-and-itemization requirements is liable for double the entire security deposit. Not double the wrongfully withheld portion. Double the full deposit. A $3,000 deposit returned late can turn into a $6,000 claim. The one carve-out: if the only violation is failing to deliver accrued interest on time, the penalty is $10 or double the interest owed, whichever is greater.²

The statute also imposes criminal-level fines for willful violations:

Failing to return the deposit when due: up to $250 per offense, though a good-faith belief that deductions were justified is an affirmative defense.
Escrow account violations: up to $500, up to 30 days of imprisonment, or both. An affirmative defense exists for landlords who lease to fewer than four tenants who paid a deposit.
Failing to pay annual interest: up to $100 per offense.

These criminal penalties require proof the landlord acted knowingly and willfully, a higher bar than the civil double-damages provision.²

If the Building Is Sold

Your deposit doesn’t vanish when a landlord sells. State law treats any transfer of a landlord’s interest as an automatic assignment of the security deposit to the new owner. The outgoing landlord has to withdraw all tenant deposits from escrow and deliver the full amount, plus accrued interest, to the incoming owner.² The new owner then becomes liable for returning your deposit under the same rules. Your landlord’s name changes; your right to the money doesn’t.

Taking It to Small Claims

If your landlord won’t return your deposit or you believe the deductions are unjustified, you can file in Connecticut’s small claims court, which handles money disputes up to $5,000.⁶ Most deposit cases fit comfortably within that limit, and you don’t need an attorney.

Your case will almost always come down to documentation. The most useful evidence:

Dated photos or video showing the unit’s condition at move-in and move-out, ideally side by side.
Move-in and move-out checklists, signed by both parties when possible.
Your lease, which establishes what you agreed to maintain and what the landlord’s obligations were.
Written correspondence (letters, emails, texts) about the deposit, forwarding address, or claimed damages.
The landlord’s itemized statement, if you received one, which locks the landlord into specific claims they then have to prove.

If you never received an itemized statement, that alone may be enough. Courts take the statutory requirement seriously, and a landlord who can’t show they provided the required breakdown faces an uphill fight justifying any deductions. Filing fees are modest, typically under $100 depending on the claim amount, with fee waivers available for low-income filers.

A Few Boundary Notes

Active-duty military tenants have additional federal protections. If you receive permanent change of station orders or deployment orders for 90 days or more, you can terminate your lease early under the Servicemembers Civil Relief Act by delivering written notice and a copy of your orders; the lease ends 30 days after the next rent payment is due.⁷ Connecticut’s standard return deadlines then apply, and your deposit cannot be withheld as an early-termination penalty.

If you sublet your own apartment, Connecticut’s statute treats you as a landlord for deposit purposes. That means escrow, interest, the 30-day written notice, and the 21-day return timeline all apply to you.² Dropping a subtenant’s deposit into your personal account is already a violation.

1
Justia Law. Connecticut General Statutes 47a-21 – Security Deposits
2
Connecticut General Assembly. Chapter 831 – Security Deposits
3
CT.gov. Banking Commissioner Announces 2026 Deposit Index
4
CT.gov. Rental Security Deposits
5
Justia Law. Connecticut General Statutes 47a-7 – Landlord’s Responsibilities
6
CT Judicial Branch. Small Claims Frequently Asked Questions
7
Consumer Financial Protection Bureau. Servicemembers Civil Relief Act (SCRA)