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States/Connecticut/21-Day Rule
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Connecticut renter guide

Connecticut 21-Day Security Deposit Rule

Connecticut generally requires the deposit plus accrued interest, or the balance plus a written itemization of damages, within 21 days after termination of the tenancy. But a later written forwarding address can move the operative deadline.

Last reviewed: August 30, 20262 official sources cited
Base period21 days

After termination of tenancy.

Forwarding-address alternative15 days

After receipt of written forwarding address, whichever date is later.

Calculate both dates

For a deadline review, calculate 21 days from termination and 15 days from the landlord’s receipt of the written forwarding address. The later date is the statutory outside date under the ordinary rule.

Forwarding-address timing matters. Connecticut’s ordinary 21-day rule must be read together with the written forwarding-address provision. Educational information only.

Official sources

Connecticut General AssemblyConn. Gen. Stat. § 47a-21 — Security deposits ↗

Current 2026 supplement governing Connecticut security deposits, caps, forwarding-address timing, itemization, escrow, interest and remedies.

Connecticut Department of BankingRental Security Deposits — Key Issues and Guidance ↗

Current official agency guidance, including the 2026 interest rate, 21-day return rule and forwarding-address guidance.

Related Connecticut guides

Security Deposit →Deposit Limits →Forwarding Address →Interest & Escrow →