45 CFR § 305.32 - Requirements applicable to calculations.
In calculating the amount of incentive payments or penalties, the following conditions apply:
(a) Each measure is based on data submitted for the Federal fiscal year. The Federal fiscal year runs from October 1st of one year through September 30th of the following year.
(b) Only those Current Assistance, Former Assistance and Never Assistance/other collections disbursed and those expenditures claimed by the State in the fiscal year will be used to determine the incentive payment payable for that fiscal year;
(e) Fees paid by individuals, recovered costs, and program income such as interest earned on collections will be deducted from total IV-D dollars expended; and
(f) States must submit data used to determine incentives and penalties following instructions and formats as required by HHS on Office of Management and Budget (OMB) approved reporting instruments. Data necessary to calculate performance for incentives and penalties for a fiscal year must be submitted to the Office of Child Support Enforcement by December 31st, the end of the first quarter after the end of the fiscal year. Only data submitted as of December 31st will be used to determine the State's performance for the prior fiscal year and the amount of incentive payments due the States.