Mortgage Calculator
30-YEAR FIXED · AMORTIZATION & PREPAYMENT PLANNER
Summary Dashboard
Amortization Table
Charts
Monthly Payment
Loan Amount ($)
Annual Rate (%)
Term (years)
Start Date
Prepayment Amount (
)
Prepayment Timing (after year
)
Show progress as of
years
Monthly Payment (P&I)
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Interest Paid
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Principal Paid
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Remaining Balance
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% Paid Off
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Total Cost of Loan (baseline)
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Interest Saved by Prepayment
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New Payoff Date
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Time Saved
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Remaining Balance Over Time
By Year
All Months
Baseline
With Prepayment
Export CSV
Period
Beginning Balance
Principal
Extra Principal
Interest
Total Payment
Ending Balance
Interest vs. Principal per Payment, by Year
Remaining Balance: Baseline vs. With Prepayment
Cumulative Interest: Baseline vs. With Prepayment
Show monthly breakdown for
Interest · Year
Baseline
With Prepayment
Difference
Current Year
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Impact to Date
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Principal · Year
Baseline
With Prepayment
Difference
Current Year
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Impact to Date
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Monthly Payment Breakdown · Principal vs. Interest
With Prepayment, the loan is already paid off by this year — no payments were made.
Baseline · Principal vs. Interest by Year of Payment
With Prepayment · Principal vs. Interest by Year of Payment