Conn. Gen. Stat. § 31-303: Day when compensation payments become due. Penalty for late payments.

Payments agreed to under a voluntary agreement shall commence on or before the twentieth day from the date of agreement. Payments due under an award shall commence on or before the twentieth day from the date of such award. Payments due from the Second Injury Fund shall be payable on or before the twentieth business day after receipt of a fully executed agreement. Any employer who fails to pay within the prescribed time limitations of this section shall pay a penalty for each late payment, in the amount of twenty per cent of such payment, in addition to any other interest or penalty imposed pursuant to the provisions of this chapter.