Note: The purchased version of this document includes a Loan Amortization Schedule Calculator (in Microsoft Excel format). For purposes of this section, the additional charges listed in subsections.The Maryland Secondary Mortgage Loan Law permits lenders to schedule balloon payments only if the balloon payment is expressly disclosed to the borrower. Basic Financial Statements. Government-wide Financial Statements. A lender may charge interest at any effective rate of simple interest not to exceed 16 percent per annum on the principal balance of a loan.