A balloon mortgage allows you to enjoy low monthly payments for several years — with a big catch. A balloon mortgage is one of many loan types you can get to buy a home.Balloon loans are short-term loans that provide the benefit of low monthly payments. The terms of the loan are the same as for other 20-year loans offered in your area. A balloon mortgage is a loan with low initial payments, but it requires the borrower to repay the balance in full in a lump sum. A balloon payment means that the term of loan has ended and the unpaid balance is then due in full. These loans require a payment at the end of a specific time period that is larger than the regular monthly mortgage payments. A balloon mortgage is just another lien and type of mortgage that once it matures to a specific time, the remaining balance is due all at once.