Balloon Mortgage Calculator
A balloon mortgage keeps payments low by amortizing over a long schedule, then requires a large lump sum when the short term ends.
How the balloon mortgage calculator works
A balloon mortgage keeps monthly payments low by amortizing the loan over a long schedule — often 30 years — while the actual term is short, commonly five or seven. You pay as if it were a long loan, but when the short term ends the entire remaining balance comes due in one large lump sum, the balloon.
Borrowers use these when they expect to sell, refinance, or come into cash before the balloon date. This calculator shows the modest monthly payment alongside the sizable amount that lands at maturity, so the trade-off is visible upfront.
Worked example: with loan amount of $280,000, interest rate of 6.00% and amortized over (years) of 30, the balloon mortgage calculator shows balloon payment due of $250,990.
- Monthly payment
- $1,678.74
- Balloon due
- $250,990
- Principal paid by then
- $29,010
- Interest paid by then
- $112,005
| Loan amount | Balloon payment due |
|---|---|
| $200,000 | $179,279 |
| $300,000 | $268,918 |
| $450,000 | $403,377 |
| $600,000 | $537,836 |
The formula
The monthly payment is computed with the standard amortization formula using the long schedule (for example 30 years), not the short term. The balloon is the remaining principal balance at the end of the short term — the original balance grown by interest minus the principal portion of the payments made so far.
- Payments are calculated on the long amortization period while the loan actually matures at the much shorter term.
- The balloon payment assumes no extra principal was paid; voluntary prepayments would shrink the lump sum due.
- A fixed rate is assumed for the full term; the model does not account for rate resets or conversion options.
- It presumes you can sell or refinance by the balloon date — if you cannot, the lump sum must be paid in cash.
- Taxes, insurance, and closing costs for any future refinance are excluded from the figures shown.
Results are estimates for educational purposes and are not financial advice. Confirm exact figures with your lender or a licensed advisor.
Questions about the balloon mortgage calculator
What happens if I can't pay the balloon when it comes due?
You generally have three options: sell the home and use the proceeds, refinance the remaining balance into a new loan, or pay the lump sum in cash.
The risk is that refinancing depends on prevailing rates, your credit, and the home's value at that moment — none of which are guaranteed. If markets have tightened, you could face a much higher rate or struggle to qualify.
Why are balloon payments lower than a standard fixed loan?
Because the payment is sized to a long amortization schedule even though the loan ends early.
Stretching the math over 30 years keeps each monthly installment small, but it also means you have barely dented the principal by the time the short term ends.
Almost the entire original balance is still owed, which is exactly why the final payment is so large.
Who is a balloon mortgage actually a good fit for?
Borrowers with a clear, near-term exit. Someone planning to sell within a few years, expecting a large bonus or inheritance, or confident they can refinance favorably may benefit from the low payments. It suits short holding periods, not long-term ownership.
If your plans are uncertain or you intend to stay put, a conventional fixed loan removes the refinancing gamble.
Is the Balloon Mortgage Calculator free to use?
Yes. Every calculator on MortgageLoansCalculator is completely free, with no sign-up, login or paywall. Run as many scenarios as you like.
How does a balloon mortgage work?
You make low monthly payments based on a long amortization, but the entire remaining balance — the balloon — comes due after a short term such as five or seven years.
Borrowers typically plan to refinance, sell or pay it off before the balloon lands.
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