Connecticut is unique in requiring landlords to pay interest on security deposits held for a year or longer. The state also caps deposits at two months’ rent (one month for seniors 62 and older), enforces a 21-day return deadline, and imposes a 2x penalty for wrongful withholding. Tenants in Connecticut enjoy some of the strongest deposit protections in the nation.

The Short Answer

Return deadline: 21 days after the tenancy ends, or 15 days after the landlord receives your written forwarding address, whichever is later
Deposit cap: 2 months rent (1 month for tenants age 62+)
Interest requirement: Must pay interest at savings deposit rate (currently 1.5–2%)
Penalty for wrongful withholding: Twice the security deposit paid (§ 47a-21(d)(2)); no attorney fees under the statute
Key protection: Interest-bearing account required

Security Deposit Cap

Connecticut law limits deposits to two months’ rent for most tenants. However, tenants age 62 or older can only be charged one month’s rent as a security deposit. This is a rare and tenant-friendly rule that recognizes seniors’ financial circumstances. If your lease exceeds these amounts, challenge it—the excess is unenforceable.

The 21-Day Return Deadline (or 15 Days After Forwarding Address, Whichever Is Later)

Connecticut’s deadline is 21 days after the tenancy ends, or 15 days after the landlord receives written notice of your forwarding address, whichever is later (Public Act 23-207 cut the period from 30 to 21 days as of October 1, 2023). The forwarding-address prong can only lengthen the deadline, never shorten it: if you send your address on day 10, the landlord still has until day 25. The clock does not start until the lease actually terminates; if you stay beyond the lease term on a month-to-month arrangement, the termination date shifts.

Learn more: C.G.S. § 47a-21

What Can a Connecticut Landlord Legally Deduct?

Connecticut permits deductions for:

Unpaid rent
Damage to the unit beyond normal wear and tear
Cleaning costs if the unit was left filthy or unsanitary
Repairs or replacement of tenant-damaged fixtures
Utility charges (if tenant is liable per lease)

Landlords may not deduct for:

Routine maintenance or repair
Normal wear and tear
Painting due to normal aging
Carpet cleaning if reasonably clean
Damage that existed before move-in

What Is Normal Wear and Tear in Connecticut?

Connecticut courts define normal wear and tear as depreciation resulting from ordinary, reasonable use. The landlord bears the burden of proving damage exceeds this standard.

Cannot deduct:

Faded paint or wallpaper
Worn carpet in living areas
Small nail holes from wall hangings
Dust or light dirt
Loose hinges or worn door handles
Worn linoleum or vinyl flooring

Can deduct:

Large holes or gouges in walls
Deep stains, burns, or odors in carpet
Broken windows or glass doors
Missing or severely damaged fixtures
Water damage or stains on ceiling (unless from natural water intrusion)
Extensive dirt requiring professional cleaning
Damage to kitchen cabinets or bathroom vanities

Penalties for Wrongful Withholding

Connecticut makes a landlord who violates § 47a-21(d) liable for twice the amount of the security deposit paid. No bad faith or willfulness is required; the bare violation is enough. The statute awards no attorney’s fees, and the penalty is measured on the whole deposit paid, not on the amount withheld. If the only violation is unpaid accrued interest, the penalty is $10 or twice the interest, whichever is greater.

How to Get Your Deposit Back in Connecticut

Understand the interest requirement: If you held the apartment for one year or longer, your landlord owes interest on the deposit. Check your lease for the account information.
Clean thoroughly: Connecticut landlords often claim excessive cleaning is needed. Document your move-out condition with photos and video.
Provide a forwarding address in writing: The landlord must deliver the deposit to that address, and the 15-day prong runs from when they receive it. Send it certified mail if possible.
Wait for the deadline: Count 21 days after the tenancy ends or 15 days after the landlord receives your address, whichever is later.
Review the itemized statement: The statement must list each deduction and the reason. Verify that interest is included if you held the apartment for a year or more.
Check the math: Calculate the interest owed. If not included, that’s a deduction dispute.
File in small claims court if needed: Connecticut courts are tenant-friendly on deposit disputes. Bring the lease, photos, the itemized statement, and evidence of the interest rate owed.

Key Statute

C.G.S. § 47a-21 — Connecticut’s security deposit law, which covers the 2-month (1-month for seniors) cap, the 21-day return deadline, the interest requirement, and the 2x penalty for wrongful withholding.

Real Situations in Connecticut

Connecticut’s interest requirement often catches landlords off guard, and it is a significant source of disputes. A tenant held an apartment in Hartford for 18 months and paid a $1,200 security deposit. Upon move-out, the landlord returned the deposit with a check for $1,200—no interest. Connecticut law required the landlord to pay interest on deposits held for a year or longer. At the current Connecticut savings deposit rate of approximately 1.5%, the tenant was owed roughly $18 in interest. While this seems small, the tenant can sue for the interest owed plus a 2x penalty on the wrongfully withheld amount (the interest itself), plus court costs. The case demonstrates how Connecticut’s interest requirement is a technical but real protection that many landlords forget.

The second common situation involves misreading the two prongs. Connecticut’s statute says the landlord has 21 days after the tenancy ends OR 15 days after receiving your forwarding address, whichever is later. A tenant in New Haven sent her new address on day 5 and expected the deposit by day 20; the landlord in fact had until day 21. When nothing arrived by day 32, the return was late under either prong, and the tenant recovered twice the deposit she had paid.

The third frequent Connecticut dispute involves the interaction of the 2-month cap with the senior (62+) 1-month cap. A landlord in Stamford leased to a 65-year-old tenant and charged two months’ rent as a security deposit despite knowing the tenant was over 62. The lease did not have an age-based deposit cap. Under Connecticut law, the maximum is one month for seniors. The tenant moved out and the landlord tried to claim deductions from the excess month. The tenant sued and won not only the refund of the excess deposit (one month) but also 2x that amount as a penalty, plus court costs—a significant recovery driven by the landlord’s failure to comply with the age-based cap.

Common Mistakes Connecticut Tenants Make

Not requesting an itemized statement that includes interest. If you lived in the apartment for a year or more, the landlord must include interest. Many landlords forget this entirely. If you don’t see interest on the itemized statement or in the returned check, immediately send a demand letter specifying the amount of interest owed based on the Connecticut savings deposit rate and the period of tenancy.

Not providing a forwarding address in writing. The statute tells the landlord to deliver the deposit to your forwarding address, and courts have dismissed claims from tenants who never gave one. Send a certified letter with your new address before or immediately after move-out. It does not shorten the 21 days, but it removes the landlord’s excuse.

Calculating the penalty on the withheld amount. Under § 47a-21(d)(2) the penalty is twice the amount of the security deposit paid, not twice the amount withheld. If you paid a $1,500 deposit and $300 was wrongfully withheld, the statutory liability is $3,000. State the deposit you paid in your demand letter and small claims filing so the judge applies the right base.

Tenant Rights Guide: Know Your Rights in Every State — the complete hub for tenant protections, eviction laws, and landlord obligations
Connecticut Eviction Notice Requirements — what your landlord must do before starting eviction proceedings in Connecticut
Connecticut Small Claims Court — how to sue your landlord for a wrongfully withheld deposit without a lawyer
Connecticut Wage Theft Laws — Connecticut wage laws, overtime rights, and how to recover unpaid wages
Connecticut Tenant Rights Guide — complete tenant rights guide for Connecticut renters

This article is for informational purposes only and does not constitute legal advice. Always verify current rules at the source linked above or consult a licensed Connecticut attorney.

Connecticut Security Deposit Laws: Interest Required and 2-Month Cap