Tools · Security Deposit

Connecticut Security Deposit Calculator (2026)

Enter your rent and move-out date to see the most a Connecticut landlord can charge and the exact date your deposit is due back — up to 2 months of rent, returned 21 days after tenancy ends, or 15 days after you give a forwarding address, whichever is later after the tenancy ends; if you give a written forwarding address later, the landlord instead has 15 days from that date, whichever falls later.

Cited to Conn. Gen. Stat. §47a-21Source: Connecticut General Assembly, Chapter 831 (Conn. Gen. Stat. §47a-21).

Connecticut security deposit calculator

Security deposit · Connecticut

State

Monthly rent

Move-out date

Connecticut rule applied to your numbers

Maximum deposit

$4,000

Up to 2 months’ rent under Connecticut law. A landlord cannot demand a security deposit larger than two months' rent. If the tenant is 62 years of age or older, the cap drops to one month's rent, and a landlord who already holds more than one month's rent from a tenant who reaches 62 must return the excess on request (Conn. Gen. Stat. 47a-21(b)).

Return deadline

21 days after tenancy ends, or 15 days after you give a forwarding address, whichever is later

21 days after tenancy ends, or 15 days after you give a forwarding address, whichever is later after the tenancy ends; if you give a written forwarding address later, the landlord instead has 15 days from that date, whichever falls later. Enter your move-out date for the exact deadline.

These are the Connecticut figures applied to what you entered: a plain summary of the rule and the dates, not a determination that anyone did or did not comply.

If a deposit is wrongly kept

A landlord who fails to return the deposit as required is liable for twice the amount of the security deposit. If the only violation is failing to pay the accrued interest, the landlord is liable for ten dollars or twice the accrued interest, whichever is greater. Courts have treated the double-damages exposure as tied to a bad-faith or wrongful failure to comply.

Interest on the deposit

Connecticut requires landlords to pay interest on every security deposit. The rate for each calendar year must be at least the deposit index that the state Banking Commissioner determines and publishes annually under Conn. Gen. Stat. 36a-26 (the index tracks the average savings deposit rate). Interest is paid on the anniversary of the tenancy and each year after, either directly to the tenant or as a credit toward the next month's rent, as the landlord chooses. The published index is 0.49% for 2026 (it was 0.52% for 2025 and 0.55% for 2024).

PlainStatute

Security deposit — Connecticut

Maximum deposit: $4,000 · 2 months’ rent
Monthly rent: $2,000
Move-out date: Not entered
Return deadline: 21 days after tenancy ends, or 15 days after you give a forwarding address, whichever is later after the tenancy ends; if you give a written forwarding address later, the landlord instead has 15 days from that date, whichever falls later

Source: Conn. Gen. Stat. §47a-21

https://www.cga.ct.gov/current/pub/chap_831.htm

Printed from plainstatute.com
Plain-language summary, not legal advice.

Informational only, not legal advice. Security-deposit rules carry exceptions (lease type, small landlords, city ordinances) this summary cannot weigh. See the full statute and exceptions on the Connecticut security deposit reference, cited to Conn. Gen. Stat. §47a-21.

How Connecticut security deposits work

Connecticut ties the security deposit cap to the tenant's age: a landlord cannot demand more than two months' rent, and the limit drops to one month's rent once a tenant is 62 or older (Conn. Gen. Stat. 47a-21). Connecticut is also one of the states that requires interest on your deposit. The rate is set each year by the state Banking Commissioner as the "deposit index," which follows the average savings deposit rate, and it must be paid on the anniversary of your tenancy or credited toward your rent. Your landlord must hold the full deposit in an escrow account at a Connecticut financial institution. After you move out, the landlord has 21 days to return the deposit with interest, or 15 days after you provide a written forwarding address, whichever is later. If a landlord wrongfully fails to return your deposit, you can recover twice the amount of the deposit.

This calculator shows the Connecticut figures applied to your own rent and dates. It is informational only and not legal advice — exceptions this summary cannot weigh may apply. For the full rules, penalties, and citations, see the Connecticut security deposit reference.

Security deposit calculators for other states

Same tool, each with its own cap and return deadline.