A balloon mortgage is a home loan with an initial period of low or no monthly payments and a large payment at the end. A balloon mortgage comes with an unusual twist.Set loan terms with larger payments at the end. Request a new payment contract, including the monthly payment amount that you can afford.​. This means once the loan term is up, the borrower must either pay a rather large "balloon payment" or refinance the loan. Get a non-bank loan that's paid back in installments with a secured promissory note. Create and download a promissory note for free!