Pursuant to federal rules (section 1220.223, paragraph 5 (iii) © (2)), a two percent penalty, compounded monthly, is assessed to first purchasers who do not remit payment by the last day of the month which follows the end quarter. If your report is postmarked after the date due, you are not entitled to keep the 2% collection fee AND you must add 2% of the gross remittance to your report.