Balloon Payment Mortgage Calculator

Reviewed by: David Chen, CFA | Commercial & Investment Real Estate
Last Updated: October 2025

Calculate your future lump sum obligation with our comprehensive balloon payment mortgage calculator. Ideal for commercial loans, investment properties, or private lending, this tool helps you visualize the trade-off between lower monthly payments today and the large balance due at maturity.

balloon payment mortgage calculator

The total principal borrowed.
Annual fixed interest rate.
Used to calculate the monthly payment.
When the remaining balance must be paid.
Balloon Payment Amount
$0.00
Lump sum due at end of term

balloon payment mortgage calculator Formula

This calculator performs a two-step process: first calculating the monthly payment based on the full amortization schedule, and then calculating the remaining principal balance at the specific balloon date.

1. Monthly Pmt = P [ i(1 + i)^n ] / [ (1 + i)^n – 1 ]

2. Balloon Bal = P [(1+i)^n – (1+i)^p] / [(1+i)^n – 1]
Source: Investopedia (Balloon Payment Calculation)

Variables

  • n: Total Amortization Months (e.g., 360 for 30 years).
  • p: Balloon Term Months (e.g., 60 for 5 years).
  • P: Loan Principal.
  • i: Monthly Interest Rate.

Related Calculators

What is a Balloon Payment Mortgage Calculator?

A balloon payment mortgage calculator is a specialized financial tool used to analyze loans that do not fully amortize over their term. Unlike a standard 30-year fixed mortgage where the balance reaches $0 at the end, a balloon mortgage leaves a substantial balance (the “balloon”) that must be paid off in a lump sum.

These loans are common in commercial real estate, seller financing deals, and some residential investment loans. The benefit is usually a lower interest rate or lower monthly payments for the initial period.

How to Calculate Balloon Payment Mortgage (Example)

  1. Define Amortization: Decide on the payment schedule (e.g., 30 years) to determine how much you pay monthly.
  2. Define Balloon Term: Decide when the loan matures (e.g., 7 years).
  3. Run Calculation: The tool calculates 84 payments (7 years) of principal and interest.
  4. Result: The remaining principal after the 84th payment is your Balloon Payment.

Frequently Asked Questions (FAQ)

What happens if I can’t pay the balloon payment?

If you cannot pay the lump sum cash, you typically must refinance the loan into a new mortgage or sell the property to pay off the debt.

Are balloon mortgages risky?

Yes, they carry “refinance risk.” If property values drop or interest rates spike when your balloon is due, you might find it difficult to refinance.

Is the interest rate fixed?

Usually, yes, for the duration of the balloon term (e.g., fixed for 5 or 7 years), but terms can vary by lender.

Can I make extra payments to reduce the balloon?

Yes. Any extra principal payments you make during the term will directly reduce the final balloon amount due.

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