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Mortgage Payoff Calculator
Estimate payoff date, remaining interest, and payoff savings using extra monthly payments and lump-sum mortgage prepayments.
Mortgage Payoff Calculator
Use this free mortgage payoff calculator to estimate how long it may take to finish paying a mortgage from the current balance forward. Enter the remaining balance, mortgage rate, monthly principal-and-interest payment, and any extra payoff amounts to compare the standard mortgage path with an accelerated strategy. It works well alongside the Mortgage Calculator, the Amortization Calculator, and the wider Financial Calculators category.
Mortgage Payoff Inputs
Accelerated Payoff Inputs
Results
payoff viewExtra mortgage payments create a meaningful payoff shortcut
This accelerated setup cuts about 59 months and saves roughly $82,010.94 in remaining interest compared with the standard payoff path.
Base Mortgage Path
Current Balance$368,000.00
Monthly Payment$2,450.00
Payoff Time24 years
Estimated Payoff DateMar 2050
Remaining Interest$335,951.93
Total Paid From Today$703,951.93
Accelerated Payoff Path
Effective Monthly Payment$2,700.00
One-Time Lump Sum$5,000.00
Accelerated Payoff Time19 years 1 month
Accelerated Payoff DateApr 2045
Remaining Interest$253,940.99
Total Paid From Today$621,940.99
Savings Summary
Months Saved59 months
Interest Saved$82,010.94
Total Cash Saved$82,010.94
First-Month Interest$1,886.00
First-Month Principal$564.00
Mortgage Rate6.15%
Accelerated payoff schedule
Year-by-year view of the accelerated mortgage payoff path, including total payments, principal reduction, interest cost, and remaining balance.
Page 1 of 2
| Year | Opening Balance | Payments | Principal | Interest | Ending Balance |
|---|---|---|---|---|---|
| 1 | $363,000.00 | $32,400.00 | $10,364.40 | $22,035.60 | $352,635.60 |
| 2 | $352,635.60 | $32,400.00 | $11,020.10 | $21,379.90 | $341,615.50 |
| 3 | $341,615.50 | $32,400.00 | $11,717.28 | $20,682.72 | $329,898.22 |
| 4 | $329,898.22 | $32,400.00 | $12,458.54 | $19,941.46 | $317,439.68 |
| 5 | $317,439.68 | $32,400.00 | $13,246.73 | $19,153.27 | $304,192.95 |
| 6 | $304,192.95 | $32,400.00 | $14,084.75 | $18,315.25 | $290,108.20 |
| 7 | $290,108.20 | $32,400.00 | $14,975.80 | $17,424.20 | $275,132.40 |
| 8 | $275,132.40 | $32,400.00 | $15,923.21 | $16,476.79 | $259,209.19 |
| 9 | $259,209.19 | $32,400.00 | $16,930.59 | $15,469.41 | $242,278.60 |
| 10 | $242,278.60 | $32,400.00 | $18,001.67 | $14,398.33 | $224,276.93 |
What is a mortgage payoff calculator?
A mortgage payoff calculator is a loan-planning tool that focuses on the remaining life of an existing mortgage instead of the original home purchase. It helps you estimate how much longer the mortgage may last, how much interest may still be paid from today forward, and how extra principal changes the payoff path.
That makes it useful when you already have a mortgage and want a clean answer to questions like whether an extra $100, $250, or a one-time lump sum is worth it. For broader mortgage analysis, continue into the Mortgage Calculator, the Canadian Mortgage Calculator, or browse more Financial Calculators.
How this calculator works
The calculator starts with the current mortgage balance rather than the original loan amount. It applies the entered mortgage rate each month, subtracts the principal-and-interest payment, and continues the amortization loop until the remaining balance reaches zero.
It then runs a second accelerated scenario using your extra monthly payment and optional lump sum. Comparing the two paths shows how many months are removed, how much interest is avoided, and when the mortgage could be fully paid off under the faster repayment plan.
Worked example
The default example uses a current mortgage balance of $368,000.00, a 6.15% mortgage rate, and a base monthly payment of $2,450.00. It adds $250.00 each month plus a one-time $5,000.00 principal payment to show how the accelerated plan changes the finish line.
Base payoff
24 years
Accelerated payoff
19 years 1 month
Interest saved
$82,010.94
In this example, the extra principal does more than lower the balance. It also shortens the time the mortgage spends accruing interest, which is why payoff acceleration can produce large savings even when the monthly extra looks modest.
Frequently asked questions
A mortgage payoff calculator estimates how long it may take to finish paying a mortgage based on the current balance, interest rate, and monthly principal-and-interest payment. This version also compares the standard payoff path against an accelerated plan using extra monthly payments and an optional one-time lump sum.
Related tools
Use these related mortgage and housing tools to compare payment structure, amortization details, and alternate borrowing setups from supporting angles.
Explore This Tool in Context
Mortgage Payoff Calculator is part of the Financial Calculators collection. If you want a broader view of similar workflows, open the Financial Calculators category page or browse all QuickTools categories.
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