Quick Reference: Every Deadline and Dollar Figure

The Deadline Almost Every Guide Still Gets Wrong

Search Connecticut security deposit return and you will be told, repeatedly, that a landlord has thirty days. Legal blogs say it. Property management sites say it. Older versions of the statute said it too.

It is out of date. Public Act 23-207, effective 1 October 2023, reduced the period, and the current text of Conn. Gen. Stat. § 47a-21(d)(2) reads twenty-one days. Connecticut's own Department of Banking states the rule the same way: landlords must return the deposit with interest, or give written notice of damages being claimed, within twenty-one days of when the tenancy ends.

The nine-day reduction is significant in practice. It is the difference between a routine move-out accounting and potential statutory double damages, because liability can arise once the applicable return-and-accounting deadline passes.

There is a thirty-day deadline in the statute. It just governs something else entirely, and it is the one most landlords have never heard of. Section 47a-21(h)(4)(A) requires the landlord to give each tenant written notice of the amount held for their benefit and the name and address of the financial institution holding it, not later than thirty days after receiving the deposit or transferring it to another account. That obligation arises at the start of the tenancy, not the end.

So Connecticut has both. Thirty days to say where the money is. Twenty-one days to give it back.

Two Clocks, and the One That Runs Later Wins

The return deadline in § 47a-21(d)(2) is not a single date. It is the later of two.

Twenty-one days after termination of the tenancy. This is the statutory deadline unless the tenant has not provided a written forwarding address. In that situation, the landlord need not return the deposit or provide the damages notice until fifteen days after receiving the forwarding address in writing.

Fifteen days after receiving written notification of the tenant's forwarding address. Where the address arrives late, the applicable deadline is the later of twenty-one days after termination or fifteen days after receipt. So a tenant who vacates on 1 March and provides a written forwarding address on 20 March gives the landlord until 4 April, not 22 March.

Two practical points follow.

• The forwarding-address clock is triggered only by written notification. A phone call or a verbal handover at key return does not start the fifteen-day period. Until the tenant provides a written forwarding address, the landlord cannot complete delivery to the statutory forwarding address.

• Request it, and preserve both dates. The safest practice is to ask for a written forwarding address at move-out and to keep evidence of the request and of the tenant's response. The fifteen-day portion of the statutory clock begins when the landlord receives the written address, not when the landlord requests it. Record the request date, the receipt date and the resulting deadline separately.

Managers who have worked through the Ohio deposit return rules and their double-damages penalty will recognise the pattern: the statutory clock is short, and the evidence that matters is a date stamp.

The Penalty Is Measured Against the Whole Deposit, and the Appellate Court Has Said So

This is where Connecticut is harsher than most people expect.

Section 47a-21(d)(2) provides that any landlord who violates any provision of this subsection shall be liable for twice the amount of any security deposit paid by such tenant. Not twice the amount wrongfully withheld. Not twice the disputed portion.

Connecticut's Appellate Court decided that exact question in Herron v. Daniels, 208 Conn. App. 75, 264 A.3d 184 (2021). The landlord argued that even if some of her deductions were pretextual, the court should have based double damages on the portion of the deposit improperly withheld rather than the full amount. The Appellate Court disagreed, holding that doubling the entire security deposit is the remedy called for by the plain language of § 47a-21(d)(2).

The court's earlier decision in Carrillo v. Goldberg, 141 Conn. App. 299 (2013) put the mechanics the same way: where a landlord does not return the entire deposit, the statute requires both the balance after deduction for tenant-caused damages and a written statement itemising the nature and amount of those damages, and if the landlord does not comply, the sanction is clear.

And in Pedrini v. Kiltonic, 170 Conn. App. 343, cert. denied, 325 Conn. 903 (2017), the court framed the enquiry as one of compliance: for the purpose of deciding whether to award double damages, the court determines whether the landlord complied with the statutory requirements rather than whether the landlord's reason for withholding was justified. A legitimate underlying damage claim does not by itself cure a failure to comply with the statutory return and accounting requirements.

Consider the arithmetic. A tenant pays $3,000. The landlord has a genuine $400 claim, returns $2,600, but does so on day 24 rather than day 21. The exposure is not $800. It is measured against the $3,000 deposit paid.

There is one carve-out, and it is narrow: if the only violation is failure to deliver the accrued interest, the landlord is liable for ten dollars or twice the accrued interest, whichever is greater. At current rates the ten-dollar floor will usually be the operative figure.

And the exposure is not capped at double. In Herron, the Appellate Court affirmed double damages together with punitive damages under the Connecticut Unfair Trade Practices Act, where the trial court found the landlord had failed to segregate the deposit, used portions of it for personal expenses, and claimed pretextual damages to avoid complying with § 47a-21(d)(2). Commingling plus a manufactured deduction is the fact pattern that converts a statutory claim into a CUTPA claim.

The converse is also established, and it is the landlord's best protection. In Carroll v. Yankwitt, 203 Conn. App. 449, 250 A.3d 696 (2021), the Appellate Court reversed a CUTPA finding because the landlord's written statement of damages satisfied the requirements of § 47a-21(d)(2). Pedrini had already rejected the argument that a failure to comply is a per se CUTPA violation where the landlord had in fact complied by delivering a timely written notification of damages. Compliance is not merely a defence to double damages; it is what keeps a deposit dispute out of CUTPA territory.

The Itemized Statement Does More Work Than You Think

If the landlord is deducting anything, § 47a-21(d)(2) requires delivery of the balance of the deposit and accrued interest together with a written statement itemizing the nature and amount of such damages. Not a total. Not "cleaning and repairs." The nature and the amount, itemised.

That document also matters because Connecticut law gives the Banking Commissioner no jurisdiction over a refusal to return all or part of a deposit where the failure results from a landlord's good faith claim of actual damages and the required written notice of those damages was provided.

Under § 47a-21(j)(2), a "good faith claim" means a claim for actual damages suffered by the landlord for which written notification of such damages has been provided in accordance with subdivision (2) of subsection (d), and the carve-out applies regardless of whether the tenant disputes the existence or amount.

A timely, itemised statement documenting an actual-damages claim is therefore what allows a landlord to invoke that carve-out. Itemisation alone does not guarantee it: the claim must concern actual damages and be made in good faith. Where those conditions are met, the deduction dispute is generally a civil matter between landlord and tenant rather than a Banking Commissioner investigation. Where the written notification was never provided, the carve-out is not available on its own terms, and the Commissioner retains jurisdiction with examination powers under § 36a-17 and cease-and-desist authority under § 36a-52 behind it.

The Interest Requirement: Small Rate, Strict Mechanics

Connecticut generally requires interest on residential security deposits, subject to the statutory exception for certain educational-institution housing discussed below.

For calendar year 2026, the rate is 0.49%. The Banking Commissioner determined the deposit index for 2026 at that figure under § 36a-26, based on average rates paid on savings and money market deposits as published in the last week of November in the FDIC's National Rates and Rate Caps. The 2025 rate was 0.52%. The Commissioner sets the applicable rate annually, so this figure should be updated when the Department publishes the next year's rate; the Department maintains a current and historical rate table. Section 47a-21(i) states that the rate for each calendar year shall be not less than the deposit index for that year, so the published rate for each calendar year applies to that year rather than one rate running across a multi-year tenancy.

Six mechanics matter more than the rate itself.

• Timing is the anniversary of the tenancy, not the calendar year end and not the lease renewal date. Interest is paid on the anniversary date of the tenancy and annually thereafter.

• The landlord chooses the method. Interest may be paid to the tenant or credited toward the next rental payment due, "as the landlord or owner shall determine." Crediting is administratively simpler and leaves its own record on the rent ledger.

• It compounds, to the extent applicable. Section 47a-21(a)(1) defines accrued interest as the interest due under subsection (i), compounded annually to the extent applicable.

• Early termination accelerates it. If the tenancy ends before the anniversary date, or the landlord returns all or part of the deposit early, accrued interest must be paid not later than twenty-one days after that termination or return.

• Delinquency forfeits it, conditionally. Interest is not payable for any month in which the tenant was more than ten days delinquent in paying monthly rent, unless the landlord imposes a late charge for that delinquency. That is a real trade-off: charge the late fee and you owe the interest for that month; waive the fee and you do not. Note that P.A. 23-207 also capped late charges, generally at the lesser of five dollars per day up to fifty dollars or five per cent of the delinquent rent.

• You cannot pass the cost on. No landlord shall increase the rent due from a tenant because of the requirement to pay interest on the deposit. Section 47a-4(a)(4) separately voids any lease clause under which a tenant agrees to waive the right to interest, and § 47a-4(a)(1) voids waivers of rights under § 47a-21 generally.

The exception: subsection (i) does not apply to a landlord of a residential unit in a building owned or controlled by an educational institution and used to house that institution's students and their families. It does expressly reach mobile manufactured home landlords and owners of mobile manufactured home spaces, lots and parks.

Escrow: Immediate, Segregated, In-State

Section 47a-21(h)(1) requires each landlord to immediately deposit the entire amount of any security deposit into one or more escrow accounts at a financial institution, for the benefit of each tenant, and to maintain the account as escrow agent. That word is the statute's own. The definition of financial institution in subsection (a)(5) covers state banks and trust companies, national banks, savings banks, federal savings banks, and savings and loan associations, in each case located in this state. An out-of-state operating account does not qualify.

Withdrawals are permitted only for the seven purposes listed in § 47a-21(h)(2): disbursing the deposit and interest due at termination; disbursing interest during the tenancy; transferring deposits on a sale; retaining interest credited to the account in excess of the amount payable to the tenant; retaining deposit and interest after termination equal to the landlord's damages; disbursing to the tenant during the tenancy; and transferring funds to another institution or escrow account provided they remain continuously in escrow.

The fourth is the only place the statute gives the landlord an economic benefit. Where the escrow account earns more than the amount payable to the tenant under subsection (i), the landlord may retain the excess. The corollary is that the landlord bears the shortfall in the opposite case, because the statutory rate is a floor regardless of what the account actually earns.

Subsection (c) explains why segregation is not optional. The deposit remains the property of the tenant, in which the landlord holds a security interest as defined in § 42a-1-201. It is exempt from attachment and execution by the landlord's creditors and is not part of the landlord's estate in any legal proceeding. Commingling does not just breach subsection (h); as Herron shows, it is also the conduct that supports a CUTPA finding. Holding escrow as a genuinely separate ledger rather than a sub-balance of operating cash is what financial and operational expense management is for.

Escrow violations carry the heaviest criminal exposure in the section. Under § 47a-21(k)(2), knowingly and wilfully violating subsection (h) is punishable by a fine of up to $500, imprisonment of up to thirty days, or both, per offence, with an affirmative defence for a person who at the time leased residential real property to fewer than four tenants who paid a security deposit.

Caps, Move-In Charges, and the Tenant Who Turns 62

A landlord may not demand a deposit exceeding two months' rent from a tenant under sixty-two, or one month's rent from a tenant sixty-two or older.

The moving part is in § 47a-21(b)(2). Where a landlord has received more than one month's rent from a tenant who becomes sixty-two after paying the deposit, the landlord must return the excess upon the tenant's request. The obligation is request-triggered rather than automatic, but a portfolio with long-tenured residents will cross that line regularly, and the request can arrive years into a tenancy. Knowing which residents are approaching that age, with the deposit history on the same record, is a straightforward argument for keeping tenant, lease and deposit data in a unified customer view.

What you may collect at the start of a tenancy is now separately restricted. Since 1 October 2023, Public Act 23-207 prohibits a landlord from demanding any payment, fee or charge for processing, reviewing or accepting a rental application, or any other payment, fee or charge before or at the beginning of the tenancy, except for specified statutory exceptions: a security deposit under § 47a-21, first month's rent, a deposit for a key, key card or other special equipment, and a regulated tenant screening report fee subject to a statutory cap. Move-in and move-out fees are prohibited. In practice that means you can no longer collect "first and last months' rent" as an additional advance payment. Screening-fee practice needs to sit inside a controlled process for the same reason, which is where tenant acquisition and screening earns its place.

The classification question still matters for tenancies where such a payment was collected historically. Under § 47a-21(a)(11), a security deposit means any advance rental payment, or any instalment payment collected under § 47a-22a, except an advance payment for the first month's rent or a deposit for a key or any special equipment. In Carrillo v. Goldberg, where a payment had actually been collected as advance last month's rent, the Appellate Court treated that advance rental payment as a security deposit for the purpose of calculating statutory interest. If you are carrying a payment of that description, confirm its treatment rather than assuming it sits outside the deposit rules.

One more definitional point. Under § 47a-21(a)(7), "landlord" includes any receiver, any successor, and any tenant who sublets his premises. A tenant who sublets and takes money from a subtenant assumes the escrow, interest and return obligations of a landlord.

Selling the Property Does Not Discharge the Obligation

Under § 47a-21(h)(3)(A), whenever real estate is transferred from a landlord to a successor, the landlord must withdraw from the escrow account and deliver to the successor the entire amount of security deposits paid by tenants of the property being transferred, plus accrued interest. If the account is commingled with deposits from properties not being transferred, and the balance is short of what all those tenants paid, the transferring landlord must deliver a pro rata share.

Under subsection (e), a successor other than a receiver is liable for tenants' claims for return of any part of the deposit that is or becomes due during the time the successor is landlord. Under subsection (c), a transfer of the landlord's interest constitutes an assignment of the security interest in all deposits.

For a buyer, that produces a specific diligence item: confirm not just the schedule of deposits but the actual escrow balance and whether it is commingled. Inheriting a shortfall is inheriting a double-damages exposure. For a seller, the escrow reconciliation belongs in the closing checklist.

Section 47a-21(f) separately requires any landlord who is not a Connecticut resident to appoint the Secretary of the State in writing as attorney for service of process.

Connecticut Provides Several Enforcement Mechanisms

Three routes exist, and a manager should assume any of them may be in play depending on the violation and the facts.

• Civil. Twice the amount of any security deposit paid under § 47a-21(d)(2), recoverable by the tenant, with CUTPA punitive damages available on appropriate facts as Herron shows. Section 47a-21(g) allows an action in replevin or for money damages and preserves other damages either party may be entitled to.

• Regulatory. The Banking Commissioner may investigate complaints about subsections (b), (d), (h) and (i), apply the examination powers in § 36a-17, and issue cease-and-desist orders under § 36a-52, subject to the good-faith-claim carve-out above.

• Criminal. Fines of up to $250 for knowingly and wilfully failing to pay a deposit when due, with an affirmative defence of good faith belief in an entitlement to deduct; up to $500 or thirty days for knowingly and wilfully violating the escrow rules; and up to $100 for knowingly and wilfully violating the interest rules. Financial institutions are not liable except in their capacity as landlord.

Subsection (l) confirms that none of this limits the Attorney General's or Commissioner's authority, or a tenant's right to bring a civil action.

Common Mistakes Property Managers Make in Connecticut

1. Working to a 30-day return deadline. It is twenty-one days since Public Act 23-207. The thirty-day figure in the statute is the escrow notice at the start of the tenancy.

2. Starting the fifteen-day clock on a verbal forwarding address, or on the date you asked for it. The period runs from receipt of the written address.

3. Assuming a good deduction cures a late return. Under Pedrini, the enquiry is whether the landlord complied with the statutory requirements, not whether the withholding was justified.

4. Assuming the penalty tracks the disputed amount. Herron held the measure is twice the entire deposit, not the portion improperly withheld.

5. Assuming double damages is the ceiling. Herron affirmed CUTPA punitive damages on top, where the deposit was commingled and the deductions pretextual.

6. Sending a bottom-line deduction figure. The statement must itemise the nature and amount of each damage. Carroll v. Yankwitt shows a compliant statement defeating a CUTPA claim.

7. Skipping the 30-day escrow notice. Due within thirty days of receiving the deposit and again on any transfer between institutions or accounts.

8. Holding deposits outside Connecticut. Qualifying institutions must be located in this state.

9. Commingling with operating funds. The deposit is the tenant's property, exempt from your creditors, and commingling supports a CUTPA claim.

10. Still collecting last month's rent at signing. Prohibited since 1 October 2023.

11. Paying interest on the calendar year. It runs on the anniversary of the tenancy, even though the rate is set per calendar year.

12. Applying one rate across a multi-year tenancy. 0.52% for 2025, 0.49% for 2026.

13. Forfeiting interest for a late month while waiving the late fee. The forfeiture applies only where a late charge was imposed.

14. Missing the request from a tenant who turned 62. The excess above one month's rent becomes refundable on request.

15. Closing a sale without reconciling escrow. The full amount plus interest must transfer, or a pro rata share if commingled and short.

16. Ignoring a Commissioner request. Account information is due within seven days.

Build the Record the Statute Is Actually Asking For

Almost every obligation in § 47a-21 is a date or a document, and each one is verifiable from records you either kept or did not.

Four things belong in the system. The tenancy anniversary date as a field, because that is the interest date and it is not the lease date, the renewal date or the calendar year end. A per-month delinquency flag paired with whether a late charge was actually imposed, because those two facts together determine whether interest accrues. The date the landlord received any written forwarding address, together with the request and delivery records, because receipt sets the fifteen-day portion of the return clock. And the escrow account identity per property, with the date the thirty-day notice went out and the date of any transfer.

The practical answer is to make the twenty-one-day return its own defined process rather than a task someone remembers. Workflow customization turns a move-out into a sequence with the itemised statement and the deadline built in, so the accounting cannot be closed without the document the statute requires. A unified customer view keeps the anniversary date, the deposit, the delinquency history and the forwarding address on one record. Financial and operational expense management is where the escrow balance lives as a segregated figure rather than a line inside operating cash.

For managers running multi-state portfolios, the contrast with a procedural state like Georgia's dispossessory process is instructive. Connecticut's deposit rules are not litigated so much as audited, and the regulator has statutory access to your account numbers on seven days' notice.

Conclusion

Connecticut treats a security deposit as the tenant's money that you are holding as an escrow agent, and it prices mistakes accordingly.

The headline number has changed and most published guidance has not caught up. The return deadline is twenty-one days after termination, or fifteen days after receipt of written notice of a forwarding address, whichever is later. Miss it, in any respect covered by subsection (d), and Herron confirms the measure is twice the entire deposit paid, with Pedrini confirming that the court looks at compliance rather than the merits of your deduction.

Around that sit the obligations that generate most of the risk. Immediate escrow at a Connecticut institution. A written notice within thirty days of the amount held and where. Interest at the annually published rate, 0.49% for calendar year 2026, on the anniversary of the tenancy. An itemised damages statement that determines whether the good-faith-claim carve-out is available and, as Carroll v. Yankwitt shows, can defeat a CUTPA claim outright. A deposit cap that changes when a tenant turns sixty-two. Payments demanded before or at the beginning of a tenancy limited to specified statutory exceptions since October 2023. And an escrow balance that must move in full when the building sells.

The operating discipline is narrow and unglamorous. Put the anniversary date on the lease record. Request the forwarding address in writing and log the date it arrives. Itemise every deduction. And treat day twenty-one as a hard stop, because the statute and the Appellate Court do.

This blog is for informational purposes only and does not constitute legal advice. The rental security deposit interest rate is set annually by the Connecticut Banking Commissioner and changes each January, and § 47a-21 has been amended repeatedly, most recently in relevant part by Public Act 23-207. Confirm the current statutory text and the current year's rate with the Connecticut Department of Banking before acting, and consult a licensed Connecticut attorney on a specific matter.

Frequently Asked Questions

Q1. How long does a Connecticut landlord have to return a security deposit?
Twenty-one days after termination of the tenancy, or fifteen days after receiving written notification of the tenant's forwarding address, whichever is later, under Conn. Gen. Stat. § 47a-21(d)(2). Public Act 23-207 reduced this from thirty days effective 1 October 2023, and much published guidance still shows the old figure.

Q2. Isn't the Connecticut deadline 30 days?
Not for returning the deposit. There is a thirty-day deadline in § 47a-21(h)(4)(A), but it applies at the start of the tenancy: written notice of the amount held and the name and address of the financial institution, within thirty days of receiving the deposit or transferring it.

Q3. What if the tenant never gives a forwarding address?
The Department of Banking states that where a tenant fails to provide a written forwarding address, the landlord need not return the deposit or provide the damages notice until fifteen days after receiving that address in writing. Request it at move-out and record the date of receipt, not the date of the request.

Q4. What is the Connecticut security deposit interest rate for 2026?
0.49% for calendar year 2026. The 2025 rate was 0.52%. The Banking Commissioner sets the rate annually under § 36a-26, so check the Department's published figure for the year in question.

Q5. When must interest be paid?
On the anniversary date of the tenancy and annually thereafter, either paid to the tenant or credited toward the next rental payment, at the landlord's election. If the tenancy ends before an anniversary, or the deposit is returned early, accrued interest is due within twenty-one days.

Q6. Can a landlord withhold interest if the tenant paid rent late?
Interest is not payable for any month in which the tenant was more than ten days delinquent, but only if the landlord imposed a late charge for that delinquency. Late charges are themselves capped under Public Act 23-207.

Q7. How much can a Connecticut landlord charge as a deposit?
Two months' rent for a tenant under sixty-two, one month's rent for a tenant sixty-two or older. If a tenant becomes sixty-two after paying more than one month's rent, the landlord must return the excess upon request.

Q8. Can a landlord still collect last month's rent up front?
No. Since 1 October 2023, Public Act 23-207 limits what may be demanded before or at the beginning of a tenancy to specified statutory exceptions and prohibits move-in and move-out fees. Where such a payment was collected historically, Carrillo v. Goldberg treated an advance rental payment for last month's rent as a security deposit for the statutory interest calculation.

Q9. What is the penalty for a late or improper return?
Twice the amount of any security deposit paid under § 47a-21(d)(2). In Herron v. Daniels, 208 Conn. App. 75 (2021), the Appellate Court held that the measure is the entire deposit rather than the portion improperly withheld, and affirmed CUTPA punitive damages in addition. Under Pedrini v. Kiltonic, 170 Conn. App. 343 (2017), the court asks whether the landlord complied with the statute, not whether the withholding was justified.

Q10. Does the deposit have to be in a separate account?
Yes. Section 47a-21(h)(1) requires immediate deposit of the entire amount into one or more escrow accounts at a financial institution located in this state, held by the landlord as escrow agent.

Q11. Can the landlord keep the interest the account actually earns?
Section 47a-21(h)(2)(D) permits the escrow agent to retain interest credited to the account in excess of the amount payable to the tenant. Where the account earns less than the statutory rate, the landlord makes up the difference.

Q12. What happens to deposits when the property is sold?
Under § 47a-21(h)(3)(A), the transferring landlord must deliver the entire amount of deposits plus accrued interest to the successor, or a pro rata share where the account is commingled and short. The successor is then liable under subsection (e) for claims that become due during their ownership.