Secure loans with a promissory note. A monthly interest rate can be included on the promissory note.Here's the information you'll need to have handy to complete your secured promissory note, interest-only with balloon final payment. 1. Periodicity (check one):. The Promissory Note shall bear interest at the rate of. Step 3 – Payments – Select one of the three available payment methods: No Installments; Installments; Interest Only. Obtain a Nevada promissory note template to establish loan terms, such as the principal amount, interest rate, and repayment obligations.