California Civil Code Article 1. Mortgages in General - Sections 2920-2944.5.This tool figures a loan's monthly and balloon payments, based on the amount borrowed, the loan term and the annual interest rate. A balloon loan is a short-term loan that does not fully amortize over its term. INSTALLMENT NOTE - INTEREST INCLUDED. (Balloon Payment). California. Some states require a specific disclosure to be given when a loan has a balloon payment. We provide the following documents for these requirements.