Mortgage Payoff
Calculator
Most calculators stop at the monthly payment. This one shows what one extra payment a month actually buys you: an earlier payoff date, and the interest you never pay.
Run the loan.
Everything runs in your browser and saves to this device only. Educational, not financial advice.
| Principal & Interest | $2,022.62 |
| Property Taxes | $400.00 |
| Home Insurance | $100.00 |
| Extra Principal | $0.00 |
| Actual Payoff Timeline | 30 Years |
| Total Interest Paid (Lifetime) | $408,142.36 |
| Total Interest Saved | $0.00 |
| Term | Monthly P&I | Total Interest |
|---|---|---|
| 30-Year Base | $2,022.62 | $408,142.36 |
| 15-Year Base | $2,787.54 | $181,757.84 |
| Difference | +$764.93/mo | $226,384.52 saved |
Compares base loans only — excludes extra principal, taxes, and insurance.
Balance vs interest, year by year.
| Year | Principal | Interest | Balance |
|---|---|---|---|
| 1 | $3,576.72 | $20,694.69 | $316,423.28 |
| 2 | $3,816.26 | $20,455.15 | $312,607.02 |
| 3 | $4,071.84 | $20,199.57 | $308,535.17 |
| 4 | $4,344.54 | $19,926.87 | $304,190.63 |
| 5 | $4,635.50 | $19,635.91 | $299,555.13 |
| 6 | $4,945.95 | $19,325.46 | $294,609.18 |
| 7 | $5,277.19 | $18,994.22 | $289,331.98 |
| 8 | $5,630.62 | $18,640.80 | $283,701.37 |
| 9 | $6,007.71 | $18,263.70 | $277,693.66 |
| 10 | $6,410.06 | $17,861.36 | $271,283.60 |
| 11 | $6,839.35 | $17,432.06 | $264,444.26 |
| 12 | $7,297.39 | $16,974.02 | $257,146.86 |
| 13 | $7,786.11 | $16,485.30 | $249,360.75 |
| 14 | $8,307.56 | $15,963.85 | $241,053.19 |
| 15 | $8,863.94 | $15,407.48 | $232,189.25 |
| 16 | $9,457.57 | $14,813.84 | $222,731.68 |
| 17 | $10,090.96 | $14,180.45 | $212,640.72 |
| 18 | $10,766.77 | $13,504.64 | $201,873.95 |
| 19 | $11,487.84 | $12,783.57 | $190,386.11 |
| 20 | $12,257.20 | $12,014.21 | $178,128.90 |
| 21 | $13,078.09 | $11,193.32 | $165,050.81 |
| 22 | $13,953.96 | $10,317.46 | $151,096.86 |
| 23 | $14,888.48 | $9,382.93 | $136,208.38 |
| 24 | $15,885.59 | $8,385.83 | $120,322.79 |
| 25 | $16,949.47 | $7,321.94 | $103,373.32 |
| 26 | $18,084.61 | $6,186.80 | $85,288.71 |
| 27 | $19,295.77 | $4,975.64 | $65,992.94 |
| 28 | $20,588.05 | $3,683.37 | $45,404.89 |
| 29 | $21,966.86 | $2,304.55 | $23,438.03 |
| 30 | $23,438.03 | $833.39 | $0.00 |
Take it with you.
Download a real Excel workbook with your numbers already filled in — live formulas throughout, so you can change the rate, the term, or the extra payment and watch everything recalculate. Includes the full amortization schedule and the 15-vs-30 comparison.
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