Pay day loans in Chicago, IL along with in virtually any town of Illinois state are LEGAL according to Ill. Comp. Stat. Ann. § 122/1-1 1 . $100 – $1,000 (although not significantly more than 25% of gross monthly earnings) advance loan may be lent for 13-45 times. The APR that is average by their state legislation is 403%, that is $15.50 charged per $100 for a fortnight.