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//// Personal Finance · Mortgage

Mortgage Payoff Calculator

Enter your loan balance, rate, and extra monthly payment to see exactly how many months you save and how much interest you avoid.

Where this fits

This tool lives inside Home Buying and is most useful for homeowners and households.

30yr Fixed Avg~6.8%
Standard Down20%
DTI Limit (QM)43%

Payoff Without Extra

28 yr

Payoff With Extra

21 yr 6 mo

Save 6 yr 6 mo

Interest Saved

$97,321

Loan Details

Base payment: $1,903/mo · With extra: $2,103/mo

MonthPaymentPrincipalInterestBalance
1$2,103$470$1,633$279,530
2$2,103$472$1,631$279,058
3$2,103$475$1,628$278,583
4$2,103$478$1,625$278,105
5$2,103$481$1,622$277,625
6$2,103$483$1,619$277,141
7$2,103$486$1,617$276,655
8$2,103$489$1,614$276,166
9$2,103$492$1,611$275,674
10$2,103$495$1,608$275,179
11$2,103$498$1,605$274,681
12$2,103$501$1,602$274,181
13$2,103$504$1,599$273,677
14$2,103$506$1,596$273,171
15$2,103$509$1,594$272,661
16$2,103$512$1,591$272,149
17$2,103$515$1,588$271,634
18$2,103$518$1,585$271,115
1

Regular Monthly Payment

P × r / (1 − (1+r)^−n)

= $1,903/mo

$280,000 at 7% for 28yr = $1,903/month

2

Payment with Extra

regular PMT + extra monthly

= $2,103/mo

$1,903 + $200 = $2,103/month total

3

Payoff Without Extra

simulate: balance − (PMT − balance × r) each month

= 28 yr

336 months at base payment

4

Payoff With Extra

simulate: balance − (totalPMT − balance × r) each month

= 21 yr 6 mo

258 months — saves 6 yr 6 mo

5

Interest Saved

total interest (no extra) − total interest (with extra)

= $97,321

$359,376 − $262,054 = $97,321 saved

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