1. a) Any credit or refund that is allowed under the Act shall bear interest at the rate of 1% per month or fraction thereof from the date when the erroneous payment for which the credit or refund is being allowed was made to the Department until the credit memorandum is issued or the refund is paid, until January 1, 1994. Interest shall not be paid on claims filed after the effective date of the Uniform Penalty and Interest Act and 86 Ill. Adm. Code 700 except such interest which is paid in accordance with Section 3-2 of the Act. (Section 3-9 of the Uniform Penalty and Interest Act [35 ILCS 735/3-9])

   EXAMPLE: A taxpayer files a claim for credit with the Department on January 15, 1994 for an overpayment of Use Tax. The overpayment occurred in October 1992 when the taxpayer self-assessed tax on a purchase of manufacturing machinery and equipment from an unregistered out-of-state retailer and then remitted the tax directly to the Department. The credit memorandum is issued on June 15, 1994. Interest shall be paid at the rate of 1% per month for the period from October 1992 through December 31, 1993; and at the semiannually adjusted interest rate imposed pursuant to the Act and these rules from January 1, 1994 through June 15, 1994, the date on which the credit memorandum was issued by the Department.

2. b) No interest will be allowed if the overpayment is found by the Department to have been made deliberately for the purpose of drawing interest, or if the overpayment is ascertained not to have been bona fide for some other reason.
3. c) When a claim that is allowed is paid by means of a credit memorandum, the claim will be considered to have been paid when the credit memorandum is issued by the Department to the claimant, and no interest will be allowed or paid by the Department for any period subsequent to that, even if the claimant does not use or assign the credit memorandum immediately after it is issued.

(Source: Amended at 24 Ill. Reg. 10728, effective July 7, 2000)