Partially Amortized Loan Calculator

Your details

The total principal amount borrowed at the start of the loan.
The fixed annual interest rate on the loan.
%
The hypothetical full repayment period used to compute the monthly payment. Typically 25 to 30 years for mortgages.
years
The actual period over which you make monthly payments before the balloon balance is due. Must be shorter than the amortization term.
years
Optional additional principal payment each month. Reduces the balloon balance.
Currency
Monthly paymentHigh balloon balance
$1,580.17

Fixed monthly payment based on the amortization term

Balloon payment$226,040.61
Total monthly payments$132,734.28
Interest paid (during term)$108,774.90
Principal paid down$23,959.39
Total cost of loan$358,774.90
Interest if fully amortized$318,861.22
Interest saved vs. full term$210,086.32
Principal repaid$23,959.39
Interest paid$108,774.90
Balloon remaining$226,040.61

Monthly payment: $1,580.17 - balloon due in 7 years.

  • Your monthly payment is set by a 30-year amortization schedule, keeping it lower than a standard loan of the same length.
  • After 7 years, you will have paid down 9.6% of the principal, leaving a balloon of $226,041.
  • Compared to keeping the loan for the full 30 years, you save roughly $210,086 in interest - assuming you pay off the balloon rather than refinancing.

Next stepPlan how you will handle the balloon payment before signing: options include refinancing, selling the property, or a lump-sum payoff from savings. Refinancing risk rises when interest rates have increased.

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