Conn. Gen. Stat. § 37-1: Legal rate. Accrual as addition to debt.

(a) The compensation for forbearance of property loaned at a fixed valuation, or for money, shall, in the absence of any agreement to the contrary, be at the rate of eight per cent a year; and, in computing interest, three hundred sixty days may be considered to be a year.

(b) Unless otherwise provided by agreement, interest at the legal rate from the date of maturity of a debt shall accrue as an addition to the debt.