Understanding your balloon mortgage results
The table below compares a balloon mortgage with a standard fully amortizing loan of the same rate and payment schedule, which is the structural distinction that determines the size of the balloon payment.
| Loan type | Payment sized over | Actual term | What happens at the end of the term |
|---|---|---|---|
| Standard fully amortizing loan | Full loan term | Same as amortization schedule | Balance reaches zero |
| Balloon mortgage | Long amortization schedule (e.g., 30 years) | Short balloon term (e.g., 5–7 years) | Remaining balance due in full (the balloon payment) |
- Because the monthly payment is calculated over a much longer schedule than the loan actually runs, only a small portion of the original principal is typically repaid before the balloon due date — most of the early payments go toward interest, consistent with standard amortization mathematics.
- This calculator does not model what happens after the balloon date. In practice, a borrower must refinance the remaining balance, sell the property, or pay the balloon amount from other funds; each option carries its own costs and depends on future credit and market conditions that cannot be predicted at origination.
- This calculator excludes property taxes, insurance, HOA dues and any refinancing or prepayment fees.
What is a balloon mortgage?
A balloon mortgage sets the monthly payment using an amortization schedule spanning many years — often 15, 20 or 30 — but the loan's actual term is much shorter, commonly five to seven years. The Consumer Financial Protection Bureau (CFPB) explains that at the end of that shorter term, the entire remaining loan balance becomes due in a single lump sum, known as the balloon payment, rather than the loan continuing to amortize to zero.
The balloon payment is not an extra fee or penalty; it is exactly the outstanding principal balance that remains after the borrower's payments over the balloon term, calculated using the same amortization schedule as any other fixed-rate loan. Because payments are sized for a much longer amortization period than the loan actually runs, only a small fraction of the original principal is repaid before the balloon comes due.
Balloon structures appear in some residential loans, but are more common in commercial real estate and short-term financing where the borrower expects to refinance, sell the asset, or otherwise resolve the balance before the due date.
How to use this balloon mortgage calculator
- Enter the loan amount (principal).
- Enter the annual interest rate.
- Enter the amortization schedule in years — the long-term schedule (for example 30 years) used only to size the monthly payment.
- Enter the balloon due date in years — the actual, shorter term after which the remaining balance is due in full. This must be less than the amortization schedule.
- Read the monthly payment, the balloon payment due at the end of the term, and how much of the original principal has been paid down versus how much interest was paid before the balloon.
The formula behind a balloon payment
The monthly payment is calculated with the standard amortization formula, using the long amortization schedule as the term — this is what keeps the monthly payment relatively low compared to a loan that fully amortizes over the short balloon term itself.
The balloon payment is the remaining loan balance after k months of payments (k = balloon years × 12), calculated by projecting the original balance forward with compound interest and subtracting the accumulated value of the payments already made.
Common mistakes
- Assuming the balloon payment is a fee — it is the outstanding principal balance itself, not an additional charge on top of the loan.
- Underestimating how large the balloon payment will be, since a low monthly payment (sized over a long amortization schedule) leaves most of the original principal unpaid at a short balloon due date.
- Not arranging a refinance, sale, or repayment plan well before the balloon due date — lenders and market conditions at that future date are not guaranteed to be favorable.
- Confusing the amortization schedule (used only to size the payment) with the actual loan term (the balloon due date) — the two are different inputs that produce very different outcomes.
- Treating a balloon mortgage as automatically renewing or refinancing itself — repayment or refinancing typically requires a new application and new underwriting.
자주 묻는 질문
What is a balloon payment?
A balloon payment is the entire remaining balance of a loan that becomes due in a single lump sum at the end of a shorter loan term, even though the monthly payment was calculated using a much longer amortization schedule. The Consumer Financial Protection Bureau describes balloon mortgages as loans where this final payment is often substantially larger than the regular monthly payments.
Is the balloon payment more than what I originally borrowed?
No. The balloon payment is the remaining principal balance after the scheduled payments, calculated with the same amortization mathematics used to set the loan's monthly payment — it is always less than the original loan amount, though it can still represent most of that amount if the balloon term is short relative to the amortization schedule.
What happens when a balloon mortgage comes due?
The borrower must pay the full remaining balance — through refinancing into a new loan, selling the property, or using other funds. This calculator computes the balloon amount due but does not model any of these resolution options, since their availability and cost depend on future credit and market conditions.
Why is the monthly payment on a balloon mortgage lower than a shorter-term standard loan?
Because the monthly payment is calculated over a long amortization schedule (for example 30 years) even though the loan actually comes due much sooner, the payment is spread over far more months than the loan will run, keeping it lower than a loan that fully amortizes over the short balloon term itself.
Who typically uses balloon mortgages?
Balloon structures are more common in commercial real estate financing and some short-term residential lending, generally used by borrowers who expect to refinance, sell the property, or otherwise resolve the loan before the balloon due date rather than hold it to full amortization.
참고 자료
- Consumer Financial Protection Bureau (CFPB). What is a balloon payment? Are balloon payments legal? consumerfinance.gov.
- Consumer Financial Protection Bureau (CFPB). Your Home Loan Toolkit — a step-by-step guide to shopping for a mortgage. consumerfinance.gov.
- Federal Reserve Board. A consumer's guide to mortgage refinancing. federalreserve.gov.
- Freddie Mac. Understanding mortgage options and loan types. freddiemac.com.
- Brueggeman WB, Fisher JD. Real Estate Finance and Investments. 15th ed. McGraw-Hill Education, 2019.