Finance & Money
Balloon Loan Amortization Schedule Calculator
Calculate scheduled and extra-principal payments, month-by-month balance, principal repaid, interest paid, balloon payoff cash, total outflow, and comparison gap.
Scheduled principal and interest payment-
Payment including extra principal-
Principal due at balloon month-
Principal repaid before balloon-
Payments before balloon-
Interest before balloon-
Balance plus entered payoff fee-
Payments plus balloon cash-
Balloon balance minus entered comparison-
Decision view
Balloon-loan amortization curve and payoff cliff
Balloon-loan amortization curve and payoff cliffScheduled and extra-principal balance paths converge on the exact balloon month and payoff requirement.
Exact scenario comparisonExtra monthly principal changes while all other entered assumptions remain constant.
| Extra monthly principal | Scheduled principal and interest payment | Payment including extra principal | Principal due at balloon month | Principal repaid before balloon | Payments before balloon | Interest before balloon | Balance plus entered payoff fee | Payments plus balloon cash | Balloon balance minus entered comparison |
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Period-by-period detail
Complete balloon-loan amortization schedule
How to use Balloon Loan Amortization Schedule Calculator
- Enter principal, rate, and full amortization term.
- Enter the balloon month and optional extra principal.
- Enter payoff fee and comparison balance.
- Inspect the live amortization curve and complete monthly schedule.
Calculator guide
Understanding Balloon Loan Amortization Schedule Calculator
A balloon loan uses a long amortization term to set the scheduled payment but requires the unpaid principal much earlier. The exact balloon balance therefore depends on every monthly interest and principal step before the balloon month.
Calculation method
How the calculation works
Build the balloon loan schedule month by month through the exact payoff date, retaining payment, interest, principal, fee, and final balloon cash as separate amounts. Calculate the fully amortizing payment, add entered extra principal, iterate the balance through the balloon month, and then add the payoff fee to the remaining principal.
Detailed calculation process
Amortize to the balloon month and reconcile final cash
The default loan is $220,000 at 6.25%, amortized over 30 years, with a balloon after month 84, $100 extra principal each month, and a $900 payoff fee.
General formula: i = r/12P = Li/[1-(1+i)^(-N)]Q = P+EB_k = L(1+i)^k-Q[(1+i)^k-1]/iR = L-B_kI_k = kQ-RC_B = B_k+FC_T = kQ+C_B The 30-year term sets the scheduled payment, but only 84 payments are made. Extra principal raises the actual payment, the closed-form balance reproduces monthly amortization, and final cash includes the remaining balance plus the entered fee.
What each symbol means
Worked substitution with the default inputs
After 84 payments of $1,454.58, the modeled balance is $187,570.10 and the balloon cash requirement including fee is $188,470.10.
Amortization decision curve
Follow principal to the balloon cliff
The balance curve compares scheduled and extra-principal paths through month 84, where a vertical payoff marker exposes remaining principal and required cash.
Worked situations
Practical examples
- The scheduled payment is $1,354.58.
- Adding $100 produces a $1,454.58 planned payment.
- The month-84 payoff requires $188,470.10 including fee.
Better inputs
Useful tips
- Compare the calculator with the lender's dated payoff quote.
- Test additional principal before relying on a refinance plan.
- Budget separately for fees, daily interest, and closing timing.
Before relying on the result
Limitations and common mistakes
- The model assumes a fixed monthly rate and payment timing.
- Escrow, penalties, late charges, daily payoff interest, and lender conventions are excluded.
- A lender quote controls the actual amount due.
Reference
Key terms
- Amortization term
- Long period used to calculate the scheduled payment.
- Balloon month
- Earlier month when remaining principal becomes due.
- Balloon balance
- Principal remaining after the selected payment.
- Payoff cash
- Remaining balance plus entered fee.
Important note
Calculated from the entered values and stated financial terms. It is not a product quote, lending decision, tax filing, or investment recommendation.
Frequently asked questions
Why is the balance still high after seven years?
The payment is based on a 30-year amortization, so early payments contain substantial interest.
Does extra principal change the scheduled payment?
No. It raises the planned payment and reduces balance faster.
Is the fee financed?
No. It is added to payoff cash at the balloon.
Why might a lender quote differ?
Daily interest, timing, escrow, penalties, and lender conventions can differ.