By Meraj Uddin Provat · Last reviewed May 23, 2026 · Editorial Standards
Mortgage Payoff Calculator (Extra Principal)
See how much faster you'd pay off your loan — and how much interest you'd save — by adding extra to each monthly payment.
Applied immediately to principal.
Extra monthly principal
Time saved
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Interest saved
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Baseline (no extra)
Monthly payment$0
Months to payoff0
Payoff date—
Total interest$0
Total of all payments$0
With extra principal
Monthly payment$0
Months to payoff0
Payoff date—
Total interest$0
Total of all payments$0
Loan balance over time
Lower line = faster payoff. The gap between the lines is the interest you don't pay.
Baseline (no extra)
With extra principal
Estimates based on standard amortization math. Confirm prepayment terms with your lender — most fixed-rate mortgages allow unlimited extra principal without penalty, but some loans have prepayment clauses. Not financial advice.
Free calculator by CalcCottage