Published 2026-09-25 · 16 min read

Connecticut Landlord-Tenant Law 2026: The Plain-English Guide

Connecticut runs residential landlord-tenant law through Title 47a of the General Statutes — Chapter 830 for the rental agreement itself (Sections 47a-1 through 47a-47) and Chapter 831 (Section 47a-21) for security deposits. It is a procedural state: deposits sit in a Connecticut escrow account and earn state-set interest, rent is not a basis to terminate until a 9-day grace period runs, most lease violations require a 15-day cure notice before anything else can happen, and the only way to remove a tenant is a court action called summary process. Landlords who skip a step usually do not lose on the merits — they lose on the paperwork, and have to start over.

This guide works through the rules a Connecticut landlord actually touches: deposit caps, escrow and interest, the return clock and its double-damages penalty, the grace period, cure notices, notices to quit, habitability duties and the tenant remedies behind them, entry, retaliation, protected tenants, fair rent commissions, and discrimination. Every deadline below is stated the way the statute states it, with dated examples you can check against a calendar.

The numbers that matter

• Deposit cap: 2 months' rent — 1 month's rent if the tenant is 62 or older (Sec. 47a-21(b)).
• Deposit interest: mandatory, at the Banking Commissioner's deposit index — 0.49% for calendar year 2026 (Sec. 47a-21(i); Sec. 36a-26).
• Deposit return: the later of 30 days after the tenancy terminates or 15 days after the tenant gives a written forwarding address (Sec. 47a-21(d)(2)).
• Deposit penalty: a landlord who violates the return rule is liable for twice the amount of the security deposit paid (Sec. 47a-21(d)(2)).
• Rent grace period: 9 days after the due date for monthly tenancies; 4 days for week-to-week (Sec. 47a-15a).
• Cure notice for lease violations: written pre-termination notice specifying the violation, with a termination date not less than 15 days after receipt (Sec. 47a-15).
• Notice to quit: at least 3 days before the termination date stated in it (Sec. 47a-23).
• Retaliation window: 6 months after a tenant's protected activity (Sec. 47a-20).

How much can a Connecticut landlord charge as a security deposit? (Chapter 831, Sec. 47a-21)

The cap, and the age-62 rule

For a tenant under 62, a landlord may not demand a security deposit above two months' rent. For a tenant who is 62 or older, the ceiling is one month's rent. The rule keeps working after move-in: a tenant who turns 62 after paying a two-month deposit can demand the excess back, and the landlord must return the portion above one month's rent on request (Sec. 47a-21(b)).

The statute defines "security deposit" broadly — any advance rental payment counts, except an advance for the first month's rent or a deposit for a key or special equipment. Renaming a charge does not take it out of the cap. Deposits can also be collected in installments under Sec. 47a-22a, which the deposit definition expressly references; installment collection changes the timing, not the ceiling or the escrow duties.

One point older summaries of this law often miss: the deposit remains the tenant's property. The landlord holds a security interest in it to secure the tenant's obligations, the funds are exempt from attachment and execution by the landlord's creditors, and they are not part of the landlord's estate in any legal proceeding (Sec. 47a-21(c)). When the property is sold or otherwise transferred, the security interest — and the duty to account — passes to the successor automatically.

Escrow: a Connecticut account, kept separate

Deposits must be held in an escrow account at a financial institution in Connecticut (Sec. 47a-21(h)). An escrow account, by the statutory definition, is an account that is not subject to execution by the escrow agent's creditors. Practically: do not hold deposits in your operating checking account, do not spend them during the tenancy, and keep a per-tenant ledger even if several deposits sit in one escrow account. The Banking Commissioner can require a landlord to disclose, within seven days of a request, the name of each bank where deposits are held and the account number of each escrow account — so the records have to exist before anyone asks.

What the deposit can be applied to is also statutory. "Tenant's obligations" means unpaid rent and utility payments owed to the landlord, the tenant's duties under Sec. 47a-11 (keeping the unit clean and safe, not damaging the premises, and the like), and the actual reasonable cost of changing the locks under Sec. 47a-7b where the tenant has not paid it (Sec. 47a-21(a)(14)). Ordinary wear from normal use is not a tenant obligation, and charging for it is the single most common deposit dispute in the state.

Use our Security Deposit Deadline Finder and deductions guide to sanity-check a deduction list before you send it.

Interest: the deposit index, paid every year

Connecticut is one of the few states that still requires interest on deposits. Under Sec. 47a-21(i), each landlord must pay interest on each security deposit at a rate not less than the deposit index for that calendar year, determined by the Banking Commissioner under Sec. 36a-26 from the FDIC's national average rates for savings and money-market deposits. The index resets every January. Recent values show how low it currently runs: 0.52% for 2025 and 0.49% for 2026, announced by the Department of Banking on December 9, 2025.

The mechanics matter more than the (small) money:

• Interest is payable on the anniversary date of the tenancy and annually thereafter — paid to the tenant or credited against the next rent due, at the landlord's choice.
• If the tenancy ends before an anniversary, accrued interest is due not later than 30 days after termination (or within 30 days after an early return of the deposit).
• Interest is not owed for any month in which the tenant was delinquent more than 10 days in paying rent — unless the landlord imposed a late charge for that delinquency, in which case the interest is still owed.
• A landlord may not raise the rent because of the duty to pay deposit interest.

Worked example: a $3,600 deposit (two months at $1,800 rent) held through 2026 accrues $3,600 × 0.49% = $17.64 for the year. The dollar amount is trivial; the compliance point is not, because the penalty for an interest-only violation is the greater of $10 or twice the accrued interest — and a landlord who ignores interest usually discovers the escrow and accounting duties in the same complaint to the Department of Banking, which is empowered to investigate deposit violations.

The return clock: later of two dates

Within the later of (1) 30 days after termination of the tenancy, or (2) 15 days after the tenant delivers written notification of a forwarding address, the landlord must deliver either the full deposit plus accrued interest, or the balance after deductions together with a written statement itemizing the nature and amount of the damages claimed (Sec. 47a-21(d)(2)). No itemized statement, no lawful withholding — the accounting is part of the delivery, not an optional courtesy.

Dated example (weekdays verified): a tenancy terminates on Monday, March 2, 2026. The 30-day track lands on Wednesday, April 1, 2026. The tenant's written forwarding address arrives Friday, March 20, 2026; the 15-day track lands on Saturday, April 4, 2026. The later date controls: the refund and itemized statement are due April 4, 2026. If the forwarding address had arrived on March 2 itself, the 15-day track would end March 17 and the April 1 date would control instead. Always compute both tracks; landlords routinely blow this deadline by watching only the 30-day one.

The penalty for getting it wrong

A landlord who violates the return provision is liable to the tenant for twice the amount of any security deposit paid — twice the full deposit, not merely twice the amount wrongfully withheld. On the $3,600 example above, that is $7,200 of exposure on top of returning what is owed, for what is usually a calendaring failure. If the only violation is failure to deliver the accrued interest, liability is the greater of $10 or twice the accrued interest. Separately, the Banking Commissioner may investigate complaints about deposit handling, so a botched return can become a regulatory file as well as a private lawsuit.

Our full walk-through of this section, with more examples, is the Connecticut security deposit law guide.

What are Connecticut's rules for rent and late fees?

The 9-day grace period (Sec. 47a-15a)

If rent is unpaid when due and the tenant fails to pay within nine days after the due date — or within four days for a one-week tenancy — the landlord may terminate the rental agreement through the notice-to-quit process in Sections 47a-23 to 47a-23b. This is a real grace period with legal consequences: before it expires, unpaid rent is not yet a basis to terminate, and a notice to quit for nonpayment delivered too early is defective. Dated example: rent due Sunday, March 1, 2026 that is still unpaid after Tuesday, March 10, 2026 (nine days thereafter) can support a notice to quit; the same notice served on March 8 cannot.

Note what the grace period does and does not do. It gates termination for nonpayment. It does not erase a late charge the lease lawfully imposes, and it does not apply to other breaches — those run through the Sec. 47a-15 cure notice below. Connecticut has no statewide rent control, but two other layers can still bite: fair rent commissions (below) can review increases in larger towns, and a lease that promises a longer grace period or a specific late-charge formula binds the landlord who wrote it.

See how to raise rent legally for increase mechanics and documentation.

Fair rent commissions (Sec. 7-148b)

Any Connecticut town, city, or borough may create a fair rent commission — and municipalities with a population of 25,000 or more must have one. A tenant can ask the commission to review a rent increase, and commissions have authority to order relief where an increase is found excessive under the statutory factors. There is no state cap on rent increases in Title 47a, which is exactly why the local layer matters: before raising rent in a larger Connecticut town, check whether a fair rent commission is active there and what its filing practice looks like.

How much time does a Connecticut tenant get to cure a lease violation? (Sec. 47a-15)

For material noncompliance with the rental agreement or with the tenant duties in Sec. 47a-11 — other than nonpayment of rent — the landlord's first move is not a notice to quit. It is a written pre-termination notice under Sec. 47a-15 that:

• specifies the acts or omissions constituting the breach, and
• states a termination date not less than 15 days after the tenant receives the notice.

If the tenant remedies the breach within that window, the rental agreement does not terminate. If the same or a substantially similar act or omission recurs within six months after the first notice, the landlord may terminate on the repeat notice without a fresh opportunity to cure — the second notice is the incurable one. Dated example: a Sec. 47a-15 notice received Monday, March 2, 2026 cannot state a termination date earlier than Tuesday, March 17, 2026.

Serious nuisance is carved out of the cure structure: conduct defined as serious nuisance in Sec. 47a-15 (which includes certain drug, violence, and building-safety conduct) supports termination without the cure sequence. Do not stretch that label onto ordinary lease friction — courts read the definition narrowly, and a notice that skips the cure step for a curable breach restarts the case.

Only after a Sec. 47a-15 notice has run its course without a cure does the notice to quit follow. Skipping the cure notice is the most common self-inflicted dismissal in Connecticut summary process.

How does eviction work in Connecticut, and when is a notice to quit required? (Sec. 47a-23)

Eviction in Connecticut is a court action — summary process — heard in the housing docket. Self-help is off the table: no lock changes to force a tenant out, no utility shutoffs, no removing doors or belongings. The sequence is:

1. Predicate notice, if the ground requires one. Nonpayment requires the grace period to have run (Sec. 47a-15a); lease violations require the Sec. 47a-15 cure notice; lapse of time and the other grounds in Sec. 47a-23(a) go straight to the notice to quit.

2. Notice to quit possession. Under Sec. 47a-23, the landlord (or the landlord's attorney or legal representative) delivers a written notice to quit, stating the ground, with a quit date at least three days after delivery. The Judicial Branch publishes form JD-HM-7 for this notice; service must be made in the statutory manner, and a state marshal is the standard route.

3. Summons and complaint. If the tenant remains after the quit date, the landlord files the summary process complaint and has it served. The tenancy has converted to a tenancy at sufferance by then — the occupant is no longer a tenant, but is still removable only by the court.

4. Judgment and the automatic stay. If the tenant loses, judgment carries a five-day stay of execution (Sundays, legal holidays, and the judgment date are not counted). Within that window, a tenant who lost for nonpayment can pay all rent due to the court and ask to remain for up to three months; a tenant who lost for lapse of time or lease violation can ask for a stay of up to six months more. These discretionary stays are why realistic Connecticut timelines are measured in months, not days.

5. Execution. Only after the stay expires can the landlord obtain an execution, which a state marshal serves — the marshal, not the landlord, performs the removal.

Two ground-specific warnings. First, the grounds in Sec. 47a-23(a) are a closed list — nonpayment, lapse of time, an expired right to occupy, material noncompliance after the cure process, serious nuisance, and a few others; "I want the unit back" is not a ground. Second, protected tenants: under Sec. 47a-23c, tenants who are 62 or older, or who have a disability, and who live in a building or complex of five or more units (or a mobile manufactured home park) cannot be evicted for lapse of time alone, apart from narrow statutory exceptions. A lapse-of-time notice served on a protected tenant is a wasted filing.

Uncontested cases can move in a few weeks; contested cases with mediation, cure claims, and discretionary stays commonly run two to three months or longer. Budget for the timeline the statute creates, not the timeline the lease wishes for. Full process: how to evict a tenant.

Repairs and habitability

The landlord's duties (Sec. 47a-7)

A landlord shall comply with all applicable building and housing codes materially affecting health and safety, and make all repairs and do whatever is necessary to put and keep the premises in a fit and habitable condition. The list in Sec. 47a-7(a) continues with the common areas, building systems, and supplied services. These duties cannot be waived by the lease — a clause purporting to shift the statutory habitability duty to the tenant is not enforceable as written. The tenant's side of the ledger is Sec. 47a-11: keep the unit clean and safe, use facilities reasonably, refrain from damaging the premises, and comply with the lawful obligations the lease imposes.

Essential services: the tenant's self-help remedies (Sec. 47a-13)

Where the landlord is responsible for supplying heat, running water, hot water, electricity, gas, or another essential service and fails to supply it (for reasons within the landlord's control), Sec. 47a-13 gives the tenant a menu after notice specifying the breach:

1. Procure and deduct — obtain reasonable amounts of the service and deduct the actual and reasonable cost from rent.

2. Substitute housing — if the landlord does not restore the service within 48 hours, obtain reasonable substitute housing during the noncompliance; rent abates for that period and the tenant can recover actual substitute-housing costs up to the amount of rent abated. If the same failure recurs within six months, substitute housing may be secured immediately.

3. Terminate for willful failure — if the failure to supply is willful, terminate the agreement and recover up to two months' rent or double the actual damages, whichever is greater; on termination the landlord must return all security and prepaid rent.

Attorney's fees are recoverable in these actions. The practical lesson for landlords is that a dead furnace in January is not a maintenance ticket — it is the start of a statutory remedies clock with a 48-hour mark on it. Document the call, the dispatch, and the restoration time.

Complaints about code conditions can also go to local health and housing-code enforcement, and a tenant's good-faith complaint feeds the retaliation protection below. Connecticut has no general repair-and-deduct statute for ordinary (non-essential-service) repairs comparable to some other states — the remedies run through Sec. 47a-13, code enforcement, and the courts.

When can a Connecticut landlord enter a rental unit? (Sec. 47a-16)

A landlord shall not abuse the right of entry or use it to harass the tenant. The landlord must give the tenant reasonable written or oral notice of the intent to enter and may enter only at reasonable times — except in an emergency, for a court order, or where the tenant has abandoned or surrendered the unit. The statute fixes no number of hours; 24 hours' written notice for non-emergency entries is the standard practice and the easiest to prove. Entry purposes follow the usual pattern — inspection, repairs, services, and showing the unit to prospective purchasers, mortgagees, tenants, and contractors.

Two related provisions round out the picture. Under Sec. 47a-16a, a tenant must notify the landlord of an anticipated extended absence, and during such an absence the landlord may enter at reasonable times for the listed purposes. And a tenant who unreasonably refuses lawful access is in breach — which is handled, like other breaches, through the Sec. 47a-15 notice, not by forcing the door.

What counts as landlord retaliation in Connecticut? (Sec. 47a-20)

A landlord may not bring or maintain an action to recover possession, demand a rent increase, or decrease services within six months after the tenant has, in good faith, attempted to remedy a condition by lawful means (including complaining to a public agency), joined or organized a tenant organization, or pursued rights under the rental agreement or Title 47a. Conduct inside the window is presumptively retaliatory, and the landlord who files anyway starts the case explaining the timing. The statute has exceptions — including where the tenant's own nonpayment or breach is the genuine ground — but the calendar discipline is simple: after a tenant complains to an inspector, be meticulous, be documented, and be patient.

Discrimination and source of income

Connecticut's fair housing law (Sec. 46a-64c and related sections) prohibits discrimination in housing on the state list of protected classes, which is broader than the federal Fair Housing Act list. The one landlords most often get wrong: source of income is a protected class in Connecticut — refusing an applicant because some or all of the rent would be paid by a housing voucher or another lawful source is discrimination under state law, subject to narrow statutory exemptions (such as certain small owner-occupied buildings). Screen voucher holders on the same lawful criteria as everyone else: rental history, credit behavior relevant to tenancy, and the ability to pay the tenant's share.

Every Connecticut clock, in one table

A 10-step Connecticut landlord checklist

1. Cap the deposit correctly on day one — two months' rent maximum, one month if the tenant is 62 or older, counting every advance payment except first month's rent and key/equipment deposits.

2. Escrow it in Connecticut — deposit into a dedicated escrow account at a Connecticut financial institution the day it is received; never commingle with operating funds.

3. Calendar the interest — note the tenancy anniversary; pay or credit interest annually at the current deposit index (0.49% for 2026), and reset your rate every January when the new index is announced.

4. Track the 10-day interest exception honestly — interest is excused only for months the tenant was more than 10 days late, and only if you did not also charge a late fee for that month.

5. Respect the 9-day grace period — no nonpayment termination step before the period runs; date your notices from the statute, not from the lease's impatience.

6. Cure before you quit — for lease violations, serve a Sec. 47a-15 notice that names the specific acts and sets a termination date at least 15 days after receipt; keep proof of delivery.

7. Use the right notice to quit — Judicial Branch form JD-HM-7 or its equivalent, statutory ground stated, quit date at least three days out, served by a state marshal.

8. Check protected status before a lapse-of-time filing — tenants 62 or older or with a disability in buildings of 5 or more units are shielded by Sec. 47a-23c from lapse-of-time evictions.

9. Run habitability like a clock — log every repair request; treat loss of heat, water, or power as a Sec. 47a-13 emergency with a 48-hour mark, and keep dispatch records.

10. Close out deposits on both tracks — compute the 30-day and 15-day return deadlines, take the later one, and deliver the refund plus an itemized written statement of every deduction by that date.

Landlord in Connecticut — or comparing New England markets? The 2-month deposit cap, the 9-day grace period, and mandatory interest on deposits are Connecticut's quirks; every state rewrites the rules. The 50-State Landlord Law Dataset (CSV + JSON) puts all 50 states' deposit caps, return deadlines, and notice periods in one spreadsheet-ready dataset ($29, one-time purchase).

Primary sources

• Conn. Gen. Stat. Sec. 47a-21 — Security deposits (Justia, 2025 code)
• Banking Commissioner Announces 2026 Deposit Index — 0.49% (Connecticut Department of Banking, Dec. 9, 2025)
• Conn. Gen. Stat. Sec. 47a-13 — Failure to supply essential services (FindLaw)
• Rights and Responsibilities of Landlords and Tenants in Connecticut (Connecticut Judicial Branch, HM031)
• Connecticut state law summary — notices, entry, and deposit rules (Apartments.com resource center)

Statute text controls over any summary, including this one; the Judicial Branch booklet is the fastest plain-English cross-check, and the Department of Banking publishes the deposit index and deposit guidance each year.

Frequently asked questions

How much security deposit can a Connecticut landlord charge?

Two months' rent for a tenant under 62, and one month's rent for a tenant who is 62 or older, under Sec. 47a-21(b). Every advance payment counts toward the cap except the first month's rent and a deposit for a key or special equipment. A tenant who turns 62 mid-tenancy can demand a refund of the amount above one month's rent. Check a planned deposit against Connecticut's two-month cap for a tenant under 62 with the Security Deposit Max Checker.

Does a Connecticut security deposit have to earn interest?

Yes. Sec. 47a-21(i) requires interest at not less than the Banking Commissioner's deposit index, which is 0.49% for calendar year 2026. Interest is paid or credited on each anniversary of the tenancy, and accrued interest is due within 30 days after the tenancy ends. The rate resets every January.

When must a Connecticut landlord return the deposit?

By the later of two dates: 30 days after the tenancy terminates, or 15 days after the tenant gives written notice of a forwarding address (Sec. 47a-21(d)(2)). The delivery must include either the full deposit plus interest or the balance plus a written itemized statement of the nature and amount of each deduction.

What is the penalty for returning a Connecticut deposit late?

A landlord who violates the return rule is liable for twice the amount of the security deposit paid — twice the whole deposit, not just twice the amount withheld. If the only failure is the interest, liability is the greater of $10 or twice the accrued interest. The Banking Commissioner can also investigate deposit complaints.

How long is the rent grace period in Connecticut?

Nine days after the due date for monthly tenancies, four days for week-to-week tenancies (Sec. 47a-15a). Only after the grace period runs with rent still unpaid may the landlord move to terminate for nonpayment through a notice to quit.

What notice is required before evicting for a lease violation in Connecticut?

A written pre-termination notice under Sec. 47a-15 that specifies the acts or omissions constituting the breach and sets a termination date at least 15 days after the tenant receives it. If the tenant cures within that period, the agreement does not terminate. A substantially similar repeat violation within six months can be terminated without a new cure opportunity. The notice to quit comes after this step, not instead of it.

How much notice does a Connecticut notice to quit require?

At least three days: the quit date in the notice must be at least three days after the notice is delivered (Sec. 47a-23). The notice must state a statutory ground, and grounds are a closed list — nonpayment after the grace period, lapse of time, material noncompliance after the cure process, serious nuisance, and similar enumerated causes.

Can a Connecticut landlord evict a senior tenant when the lease expires?

Usually not on lapse of time alone. Under Sec. 47a-23c, tenants who are 62 or older or who have a disability, living in buildings or complexes of five or more units or in mobile manufactured home parks, are protected from lapse-of-time evictions except on narrow statutory grounds. Other grounds, such as nonpayment, remain available if the landlord follows the required notice steps.

More landlord-tenant law guides

• Landlord-tenant law by state
• Colorado landlord-tenant law
• Delaware landlord-tenant law
• California landlord-tenant law
• Florida landlord-tenant law

This is general information, not legal advice. Consult a Connecticut landlord-tenant attorney for specific situations.