215 ILCS 120/13
Every company authorized under this Act shall file with the Director by January 31 of each year a financial statement for the year ending December 31 of the year preceding on forms prescribed by the Director. A company may request the Director to grant an extension until February 15; however, such request must be received by the Department of Insurance no later than January 25. The Director shall not deny a request for an extension made by a company whose gross premium written for the year just ending exceeds $750,000.
The Director may require that a company file quarterly financial statements which shall be due 30 days after the end of each quarter.
A company failing to file its annual financial statements by January 31 or by February 15 (if the Director had previously granted such extension) shall pay to the Director, a penalty of $20 per day for each day after the due date that the statement was not received.
215 ILCS 120/13