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Connecticut · Property taxConnecticut property tax: the town sets the installments, then a one-month grace and 18% interest

In Connecticut, each municipality's legislative body decides, when it approves the budget, whether property tax is due in a single installment, two semiannual installments or four quarterly installments, and designates the due dates; the last installment must fall due at least forty-five days before the end of the fiscal year (C.G.S. §12-142). The tax collector advertises the due dates and the delinquency dates in advance and again before delinquency (§12-145). An installment not paid in full on or before the same date of the month following the due date is delinquent and bears interest from the original due date (§12-146). Delinquent principal bears interest at eighteen percent a year, each fraction of a month counted as a whole month, with a two-dollar minimum per installment that a municipality may vote not to impose (§12-146). For a closing, the town tax collector's bill and the installment schedule determine the proration.

What the statutes set

  1. Installments (§12-142)

    One, two or four, set by each municipality; last one 45 days before fiscal year-end.

  2. Grace (§12-146)

    Delinquent if unpaid by the same date of the next month.

  3. Interest (§12-146)

    18% a year from the due date; any part of a month counts as a month.

  4. Minimum (§12-146)

    $2 per installment unless the municipality votes not to impose it.

What the TC checks on Connecticut property tax before closing

  • Get the town's installment dates and the current bill from the tax collector.
  • If closing falls in the grace month, confirm the installment is paid before it turns delinquent.
  • Prorate using the installment schedule the town actually adopted.

Questions about Connecticut property tax

When is Connecticut property tax late?

An installment unpaid by the same date of the month after it was due is delinquent (C.G.S. §12-146).

What interest does Connecticut charge on late property tax?

Eighteen percent a year from the due date, each part of a month counted as a full month, with a $2 minimum per installment (C.G.S. §12-146).

Related guides

Track the tax installment and the proration as tasks on the deal in ClosingCode.

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Sources: Connecticut General Statutes §§12-142, 12-145, 12-146 (cga.ct.gov), read October 31, 2026.

General information, not legal advice. ClosingCode is software; it is not a law firm or brokerage. This guide is not a substitute for the advice or services of an attorney.