The Interest Act (815 ILCS 205/4)General Interest Rate section states: In all written contracts it shall be lawful for the parties to stipulate or agree that 9% per annum , or any less sum of interest...before or after July 1, 1969... any rate of interest greater than the maximum lawful rate at the time the contract is made, is void
Hope that helps.
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David J Mulkerin, CRCM
All opinions expressed are mine and not those of my employer and are not to be taken as legal advice.