Cal. Fin. Code § 18351

On or before the 30th day of November in each year, the commissioner shall notify each industrial loan company by mail of the amount assessed and levied against it and that amount shall be paid within 20 days thereafter. If payment is not made within 20 days, the commissioner shall assess and collect a penalty in addition to the assessment, of 1 percent of the assessment for each month or part of a month that the payment is delayed or withheld.