Mortgage Payoff Calculator: Extra Payment Impact
Regular extra amount added at the selected frequency.
Advanced options
One-time extra principal payment in the selected month.
Result
Baseline monthly payment
$45,648.69
Accelerated monthly payment
$65,648.69
Baseline payoff term (months)
180
Accelerated payoff term (months)
93
Months saved
87
Interest saved
$2,129,430.78
This result is informational only and is not professional advice.
Base scenario
180 mo ? $45,648.69 / mo
With extra payment
93 mo ? $65,648.69 / mo
Balance trend
Schedule with extra payments
Long schedules are grouped for easier scanning
| Period | Payment | Interest | Principal | Balance |
|---|---|---|---|---|
| 1-12 | $787,784.27 | $411,113.52 | $376,670.74 | $3,823,329.26 |
| 13-24 | $787,784.27 | $370,845.07 | $416,939.19 | $3,406,390.06 |
| 25-36 | $787,784.27 | $326,271.68 | $461,512.59 | $2,944,877.47 |
| 37-48 | $787,784.27 | $276,933.11 | $510,851.16 | $2,434,026.32 |
| 49-60 | $787,784.27 | $222,319.94 | $565,464.33 | $1,868,561.99 |
| 61-72 | $787,784.27 | $161,868.28 | $625,915.99 | $1,242,646.00 |
| 73-84 | $787,784.27 | $94,953.96 | $692,830.30 | $549,815.70 |
| 85-93 | $572,843.36 | $23,027.66 | $549,815.70 | $0.00 |
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Useful links
Compare baseline mortgage payoff with an extra-payment scenario.
See how extra monthly mortgage payments can shorten payoff time and reduce total interest in a fixed-rate scenario.
Use this calculator when you need a quick, practical estimate from remaining mortgage balance, fixed APR, remaining term, and extra monthly payment.
You get new payoff timeline in months, estimated interest savings versus baseline, and baseline monthly payment reference.
Primary assumption: Rate is treated as fixed across the remaining term.
What this calculator shows
- New payoff timeline in months
- Estimated interest savings versus baseline
- Baseline monthly payment reference
What to keep in mind
- Rate is treated as fixed across the remaining term.
- Extra payment is applied consistently every month.
- No refinancing fees, recast fees, or lender policy constraints are modeled.
FAQs
What is included in this estimate?
The calculator focuses on new payoff timeline in months, estimated interest savings versus baseline, and baseline monthly payment reference.
Can I compare multiple scenarios?
Yes. Change one input at a time and compare new payoff timeline in months and estimated interest savings versus baseline.
Can I treat this as a final legal or financial quote?
No. The model uses assumptions such as: No refinancing fees, recast fees, or lender policy constraints are modeled.
What if my lender applies prepayments differently?
Use this as a scenario estimate and verify lender-specific prepayment rules.
Worked example
Example: $250,000 at 5.5% with $300 extra monthly
Input: Balance: $250,000; Rate: 5.5%; Remaining term: 240 months; Extra: $300
Output: Payoff term drops significantly and total interest decreases versus baseline.
Note: Use your lender statements to validate how extra funds are allocated in practice.