Specialty Mortgage Calculator
Balloon Mortgage Calculator
Estimate the monthly payment on a balloon mortgage and see how much principal may still be due when the shorter balloon term ends. Compare the amortization period, balloon date, interest cost, and remaining balance before relying on a future payoff or refinance.
Last reviewed: September 1, 2026
Balloon Mortgage Calculator
Estimate the monthly payment, remaining balance, and lump-sum balloon payment.
Balloon Loan Details
The amortization period determines the scheduled monthly payment. The shorter balloon term determines when the remaining unpaid principal must be paid, refinanced, or otherwise satisfied.
Your Balloon Mortgage Results
Estimated remaining principal due after 7 years of scheduled payments.
The estimate leaves $326,835 of principal outstanding. A future refinance is not guaranteed, so the repayment plan should not depend on refinancing being available on favorable terms.
See If You Can Get Pre-Approved
You have an estimated mortgage result. Continue to pre-approval to explore mortgage options for your home-buying scenario.
Checking options does not change your calculator estimate. Loan availability, rates, and eligibility depend on lender and borrower qualifications.
The remaining balance at the end of the balloon term becomes the estimated lump-sum balloon payment.
Important Balloon Mortgage Assumptions
This calculator models a level-payment loan using the selected amortization period and assumes the remaining principal is due at the end of the balloon term. Taxes, insurance, and HOA amounts are estimates and are not part of the loan balance. Actual balloon-loan contracts may use different payment structures, fees, prepayment terms, qualification requirements, or maturity provisions.
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A balloon mortgage can leave a substantial balance due at maturity. Compare current mortgage offers from participating lenders as you evaluate your financing options.
What is a balloon mortgage?
A balloon mortgage uses one period to calculate the scheduled monthly payment and a shorter period for the actual loan maturity. For example, a loan might calculate principal and interest as if it were being repaid over 30 years but require the remaining unpaid principal after 5, 7, or 10 years.
That remaining principal is the balloon payment. Unless the remaining balance has already been paid down, the borrower must satisfy it at maturity according to the loan agreement, which may require cash, sale proceeds, or replacement financing.
How this balloon mortgage calculator works
The calculator first determines the loan amount from the home price and down payment. It then calculates the scheduled principal and interest payment using the selected interest rate and amortization period.
Original principal − principal repaid before maturity = estimated remaining balloon balance
The amortization schedule stops at the balloon date. After the scheduled payment for that month, the calculator treats the remaining loan balance as the estimated lump-sum amount due.
Amortization term vs. balloon term
Example of a balloon mortgage
Suppose a mortgage is amortized over 30 years but has a 7-year balloon term. The monthly principal-and-interest payment is calculated using the 30-year repayment schedule, but the loan does not continue for all 30 years under that structure. After the 84th scheduled payment, the unpaid principal is the estimated balloon amount due.
Because only part of the original principal has been repaid by that time, the final balloon amount can remain large even when every scheduled monthly payment has been made on time.
What happens when a balloon payment is due?
The loan agreement controls what is required at maturity. A borrower may plan to pay the balance from available funds, sell the property, or obtain new financing. A refinance should be treated as a future financing decision rather than a guaranteed exit strategy.
Future rates, credit qualifications, income, property value, underwriting requirements, and loan availability can all differ from the conditions that existed when the original balloon mortgage was made.
Key risks to evaluate
Refinancing risk
The ability to replace the balloon loan later depends on future lender requirements, market conditions, borrower qualifications, and property value.
Large maturity balance
A long amortization period paired with a short balloon term can leave most of the original principal outstanding when the loan matures.
Property-value risk
If the property's value falls, the remaining loan-to-value ratio may make a future refinance or sale more difficult.
Cash-flow risk
A large lump-sum maturity obligation can create substantial financial pressure if the planned payoff source is unavailable.
Balloon mortgage vs. a fully amortizing mortgage
A fully amortizing mortgage is structured so scheduled payments reduce the balance to zero by the end of the stated repayment term, assuming payments are made as scheduled and the loan terms do not change. A balloon mortgage matures earlier than its payment amortization schedule and therefore can require a large remaining principal payment before that longer schedule would have reached zero.
The important comparison is not simply the initial monthly payment. Review the amount that will still be owed at maturity, the expected source of payoff funds, and the consequences if replacement financing is unavailable.
Balloon mortgage vs. an adjustable-rate mortgage
A balloon term and an adjustable interest rate describe different loan features. A balloon provision determines when the remaining balance becomes due. An adjustable-rate feature determines whether and how the interest rate can change. A loan could potentially have one feature without the other, depending on its contract.
Frequently asked questions
How is a balloon payment calculated?
For the level-payment structure modeled here, the scheduled monthly principal and interest is calculated using the longer amortization period. The unpaid principal remaining after the final scheduled payment in the balloon term becomes the estimated balloon payment.
Does the balloon payment include future interest?
The calculator treats the balloon payment as the unpaid principal remaining at maturity. Interest accrued through the scheduled payment date is included in the regular payment calculation. Actual loan documents control any additional charges or maturity-date interest.
Can extra payments reduce the balloon payment?
Yes, when the loan permits principal prepayments. Extra principal reduces the outstanding balance, which can reduce both future interest and the final balloon amount.
Is a 30-year amortization the same as a 30-year loan term?
Not necessarily. With a balloon mortgage, a 30-year amortization period may be used only to calculate the scheduled payment while the actual loan maturity occurs much sooner.
Can I refinance before the balloon payment is due?
A borrower may seek refinancing before maturity, but approval is not guaranteed. Future eligibility depends on the lender, credit, income, property value, market conditions, and available loan programs.
What if the balloon term equals the amortization period?
If the loan is fully amortized over the same period and payments are made as modeled, there should be little or no remaining principal to create a material balloon payment.
Methodology and editorial transparency
MortgagePaymentCalculator.io is published by Family Brands LLC. Calculator results are estimates for educational and planning purposes and are not mortgage quotes, lending decisions, approvals, or guarantees that future refinancing will be available.