Calculate scheduled payments and the balance due at an earlier balloon date.
It keeps the property value, balance, cash amounts, rate convention, payment timing, and comparison horizon visible so the result can be checked against an actual quote, statement, budget, or contract.
Calculation structure
Follow the money through time
Payment uses the longer amortization term; the balloon is the remaining principal after the selected earlier payment.
Visual explanation
See which inputs change the result
Stage 1→Stage 2→Later stageRecalculate from the balance remaining at each changePayment uses the longer amortization term; the balloon is the remaining principal after the selected earlier payment.
Read the estimate correctly
Use the result with its assumptions
A 120,000 mortgage at 0% amortized over 120 months has 1,000 monthly payments. After payment 60, the balloon balance is 60,000.
The balloon amount excludes discharge fees, penalties, taxes, and refinancing costs.
Quick guide
How to use this calculator
Enter the contractual or scenario values requested by each label.
Keep amounts in one currency and use the whole-period unit shown on each label.
Review every result with the stated exclusions.
Calculation method
Calculation method
Payment uses the longer amortization term; the balloon is the remaining principal after the selected earlier payment.
The engine retains calculation precision and rejects invalid or numerically unreliable schedules.
Worked example
Scenario example
A 120,000 mortgage at 0% amortized over 120 months has 1,000 monthly payments. After payment 60, the balloon balance is 60,000.
Payment uses the longer amortization term; the balloon is the remaining principal after the selected earlier payment.
Supported inputs
Precision and limits
Visible limits
Amounts are capped at 1e12, entered rates at 1000%, periods at 1,200 months or 100 years, and fixed decimals at 12 places. A derived ARM rate above 1000% is rejected.
International scope
No jurisdiction, currency, tax, insurance, index path, lender rule, or legal interpretation is assumed.
Not a quotation
Results are mathematical scenarios based only on entered terms.
Specific assumptions
The balloon amount excludes discharge fees, penalties, taxes, and refinancing costs.
