Balloon mortgage
Definition
A balloon mortgage is a loan whose scheduled payments do not fully pay off the principal by the end of the term. A large remaining balance then becomes due.
In plain English
Some loans are built so the regular payments never finish the debt. At the stated end date, a remaining principal amount—the balloon—comes due. Borrowers sometimes refinance or sell before that date. Those are later choices, not part of this definition.
Technical definition
Consumer and GSE glossaries describe a balloon as a mortgage that is not fully amortizing and requires a large payment at maturity.
Why it matters
A balloon is easy to confuse with a short fixed-rate term. The distinguishing feature is the unpaid balance still due at the end.
Related terms
Sources reviewed
Glossary of key terms
ObservedSeptember 4, 2026
Mortgage key terms
ObservedSeptember 4, 2026