Usury

"Any lender may charge and collect from a borrower interest at any rate agreed upon in writing not in excess of 5% over the Federal Reserve discount rate including any surcharge thereon. Where there is no expressed contract rate, the legal rate of interest shall be 5% over the Federal Reserve discount rate including any surcharge as of the time from which interest is due. Any judgment entered on agreements governed by this subsection, whether the contract rate is expressed or not, shall, from the date of the judgment, bear post-judgment interest of 5% over the Federal Reserve discount rate including any surcharge thereon or the contract rate, whichever is less. There shall be no limitation on the rate of interest which may be legally charged for the loan or use of money, where the amount of money loaned or used exceeds $100,000, and where repayment thereof is not secured by a mortgage against the principal residence of any borrower.(6 Del.C. § 2301)

A licensee may charge and collect interest under a revolving credit plan on outstanding unpaid indebtedness in the borrower's account under the plan at such daily, weekly, monthly, annual or other periodic percentage rate or rates as the agreement governing the plan provides or as established in the manner provided in the agreement governing the plan. Periodic interest may be calculated using an average daily balance, 2-cycle average daily balance, adjusted balance or previous balance method or using any other balance computation method provided for in the agreement governing the plan. Periodic billing cycles may be established in such manner and shall have such duration as may be specified in the agreement governing the plan. (5 Del.C. § 2216)"