Connecticut late fee calculator: is your rent late fee legal?
What the law says in Connecticut: A late charge is allowed only if the written rental agreement provides for it, and only after the grace period: 9 days after the due date (4 days for a one-week tenancy). Since January 1, 2026, the grace period is 5 days longer if the landlord's online rent payment system prevents the tenant from paying on time. The charge may not exceed the lesser of $5 per day up to $50, or 5% of the delinquent rent (5% of the tenant's share if a government or charity pays part of the rent), and only one late charge may be assessed per late payment. A lease clause that charges earlier or more is unenforceable.
Source: Conn. Gen. Stat. 47a-15a(a), (b); 47a-4(a)(8), (9), (b)
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Enter your rent and the late fee to check it.
Source: Conn. Gen. Stat. 47a-15a(a), (b); 47a-4(a)(8), (9), (b) · All Connecticut renter rules
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General information only, not legal advice. Cities can add their own rules, and laws change; always check the linked source.