Connecticut Landlord-Tenant Law for Month-to-Month Leases

Connecticut landlord-tenant law for month-to-month leases is unusually fast on the exit and unusually protective in the middle. Either side can end the tenancy with just three days’ written notice, but while the rental is active the state imposes a nine-day grace period on rent, caps late fees, regulates security deposits closely, and gives tenants strong anti-retaliation protection.

Ending a Month-to-Month Tenancy

Either the landlord or the tenant can end a month-to-month rental by delivering a written Notice to Quit at least three days before the rental period expires.¹ If rent is due on the first of the month, the notice has to reach the tenant no later than the 28th of the prior month. That is dramatically shorter than most states allow, and both sides need to watch the calendar.

The notice must identify the tenant, the rental address, the date the tenant is expected to vacate, and the reason for termination. When a month-to-month tenancy is simply ending because one party wants out, the reason is “lapse of time.” Other permissible grounds include nonpayment of rent, lease violations, nuisance, and the landlord’s bona fide intention to use the unit as a principal residence.²

Delivery has to be made in person to the tenant or left at the residence by a state marshal or any uninvolved third party, and it can happen on any day of the week.¹ A defective or late notice will not hold up in court, and the tenancy continues until a valid one is properly served.

When Rent Is Due and the Nine-Day Grace Period

Unless the parties agree otherwise, rent is due at the beginning of each monthly rental period and is payable at the dwelling itself.³ A landlord cannot start eviction proceedings the moment the rent is late. Connecticut gives monthly tenants a nine-day grace period (four days for weekly tenancies), and no Notice to Quit for nonpayment can be served until that period has run.⁴

The grace period is built into the statute. A lease cannot waive it. Even a clause saying rent is “due on the first, late on the second” does not shorten the nine days.

When a tenant pays in cash, the landlord must provide a written receipt showing the date, amount, and purpose of the payment.³

Late Fees

A late fee is only chargeable if the lease specifically allows one in writing, and it cannot begin until after the nine-day grace period expires. Even then, Connecticut caps the fee at the lesser of five dollars per day up to a maximum of fifty dollars total, or five percent of the overdue rent payment. When part of the rent is paid by a government or charitable entity, the five percent cap applies only to the tenant’s share.⁴

Only one late charge is allowed per delinquent payment, no matter how long it stays unpaid. Stacking daily fees past the fifty-dollar cap or re-billing a new fee each month on the same overdue amount violates the statute.

Rent Increases and Required Notice

Connecticut does not cap how much a landlord can raise rent, but written notice is required. For rental agreements entered, renewed, or extended on or after October 1, 2024, landlords must give at least 45 days’ written notice of a proposed rent increase. For tenants with lease terms of one month or less, the notice period equals the full length of the lease term, so a month-to-month tenant gets at least one full month’s notice before a rent increase takes effect.⁵

Tenants who think an increase is excessive have a potential check through Connecticut’s fair rent commission system. Municipalities with populations of at least 25,000 are required to establish fair rent commissions, and smaller towns may do so voluntarily. These commissions can investigate complaints about harsh or unconscionable rent charges, and a tenant who refuses an increase that the commission later finds unreasonable has some protection against eviction for that refusal.

Security Deposits

Security deposits are capped at two months’ rent for tenants under 62 and one month’s rent for tenants 62 or older.⁶ A tenant who turns 62 during the tenancy and has already paid more than one month’s rent can request a refund of the excess.

The deposit must sit in an escrow account at a Connecticut financial institution, and the landlord has to pay the tenant annual interest on it at a rate set each year by the Banking Commissioner. For 2026, that rate is 0.49%.⁷ Interest accrues from the anniversary date of the tenancy, and the landlord must notify the tenant of what has accrued. The tenant can take the interest as a payment or agree in writing to apply it to rent.

After a tenant moves out, the landlord has 21 days from the end of the tenancy or 15 days after receiving the tenant’s written forwarding address, whichever is later, to return the deposit plus interest. Any portion withheld for damages beyond normal wear and tear must come with an itemized written statement explaining each deduction.⁶ A landlord who misses these deadlines or skips the itemization is liable for double the deposit amount.⁷

Repairs and the Rent Escrow Remedy

Landlords must keep rental properties in compliance with all applicable building and housing codes that materially affect health and safety. The duty covers structural elements like roofs, walls, and plumbing, along with heating, hot water, electrical systems, and garbage disposal facilities.⁸

No statute sets a specific number of days for repairs, but courts distinguish between emergencies and everything else. A broken furnace in January or a sewage backup demands an immediate response. A dripping faucet or a cracked tile allows more time. The practical test is whether the problem threatens health or safety.

When a landlord ignores repair requests, the tenant can file a complaint in housing court and start paying rent into a court-controlled escrow account instead of to the landlord. Rent stays in escrow until the problem is fixed, which creates real financial pressure.⁹ One limit on the remedy: a tenant cannot use it if the landlord has already filed an eviction action against them.

Cure Period for Lease Violations

Before evicting a month-to-month tenant for a lease violation, the landlord must give at least 15 days’ written notice describing what the tenant did wrong. If the problem is fixable (an unauthorized pet, excessive noise, unpaid utility charges), the tenant has those 15 days to remedy it. Correcting the violation in that window keeps the tenancy intact and ends the eviction.¹⁰

The protection has a ceiling. If the tenant commits substantially the same violation again within six months after the original notice, the landlord can move straight to eviction without offering another cure period.

How Evictions Actually Work

Every eviction in Connecticut begins with a Notice to Quit. If the tenant does not leave by the date in the notice, the landlord has to file a summary process action in housing court. There are no shortcuts. A landlord who changes the locks, removes a tenant’s belongings, or shuts off utilities to force someone out can be sued, and the tenant can bring a complaint to any Superior Court judge for relief.¹¹

Once the complaint is filed, the court schedules a hearing. The tenant has the right to appear, contest the eviction, and raise defenses such as improper notice, retaliation, or failure to maintain the property. If the court rules for the landlord, an automatic five-day stay (not counting Sundays and legal holidays) runs before the eviction can be carried out, and the tenant can apply for additional stays ranging from three to six months under the statute.¹² If the tenant has not left after the stay and no further extensions are granted, a state marshal carries out the physical eviction.

Retaliation Protections

Connecticut bars landlords from retaliating against tenants who exercise their legal rights. A landlord cannot file an eviction, raise the rent, or reduce services within six months after a tenant does any of the following:

Reports a housing or health code violation to a government agency or fair rent commission.
Asks the landlord in good faith to make repairs.
Files a housing court action, including the rent escrow remedy.
Organizes or joins a tenants’ union.

When an adverse action lands inside that six-month window, the timing itself creates a strong presumption of retaliation that the landlord has to overcome in court.¹³ Landlords who are not aware of the rule often create problems for themselves by raising rent or serving a Notice to Quit shortly after a tenant complains.

Fair Housing and Lead Paint Disclosure

Connecticut’s fair housing protections go further than federal law. On top of the federal classes (race, color, religion, national origin, sex, familial status, and disability), the state protects ancestry, marital status, age, lawful source of income, sexual orientation, and gender identity.¹⁴ A landlord who refuses to rent to someone because they pay with a housing voucher, for example, could face a discrimination claim under the lawful source of income protection.

Landlords renting units in buildings built before 1978 also have a federal duty to disclose any known lead-based paint hazards. Before the tenant signs the lease, the landlord must hand over any records and reports on lead paint, include a specific warning statement, and provide the EPA pamphlet on lead safety.¹⁵ Skipping those steps exposes the landlord to significant federal penalties.

Where Disputes Get Resolved

Not every disagreement needs a courtroom. Many Connecticut municipalities offer mediation through local housing authorities or fair rent commissions, which can settle fights over maintenance, deposits, or rent increases without litigation.

When mediation fails, small claims court handles cases up to $5,000 in money damages. Unpaid rent, property damage, and security deposit disputes commonly end up there. For security deposit claims specifically, the court can award double damages even when that figure exceeds the $5,000 limit.¹⁶ Larger or more complicated matters, including contested evictions and habitability cases, go to Connecticut’s Housing Court, a specialized division of the Superior Court. Tenants who cannot afford a lawyer may qualify for free help through Connecticut Legal Services or other legal aid organizations.

1
Justia. Connecticut Code 47a-23 – Notice to Quit Possession or Occupancy of Premises
2
Connecticut General Assembly. Chapter 832 – Summary Process
3
Justia. Connecticut Code 47a-3a – Rental Agreement: Payment of Rent
4
Connecticut General Assembly. Chapter 830 – Rights and Responsibilities of Landlord and Tenant – Section 47a-15a
5
Connecticut General Assembly. OLR Bill Analysis – 2025HB-06943
6
Justia. Connecticut Code 47a-21 – Security Deposits
7
Connecticut Department of Banking. Rental Security Deposits
8
Justia. Connecticut Code 47a-7 – Landlord’s Responsibilities
9
Justia. Connecticut Code 47a-14h – Action by Individual Tenant to Enforce Landlord’s Responsibilities
10
Justia. Connecticut Code 47a-15 – Termination of Rental Agreement for Noncompliance
11
Justia. Connecticut Code 47a-43 – Complaint and Procedure: Forcible Entry and Detainer
12
State of Connecticut State Marshal Commission Manual. Section 6: Evictions (Summary Process)
13
Justia. Connecticut Code 47a-20 – Retaliation by Landlord
14
Connecticut Conference of Municipalities. Fair Housing
15
United States Environmental Protection Agency. Protect Your Family From Lead in Your Home
16
Justia. Connecticut Code 51-15 – Rules of Procedure in Certain Civil Actions, Small Claims