Loan Lab

Compare two loan scenarios side by side. See how a rate change, shorter term, or extra monthly payments affect your total cost.

Scenario A

$300,000
7%
30 years
$0
Monthly payment
Total interest
Payoff time
Total paid
vs

Scenario B

$300,000
5.5%
25 years
$200
Monthly payment
Total interest
Payoff time
Total paid
Monthly difference
Interest saved
Time saved

How to use this tool

Set Scenario A to your current loan and Scenario B to the alternative you're considering — a lower rate, shorter term, or extra payments. The chart shows how quickly you'd pay off each loan.

When does refinancing make sense?

Refinancing typically saves money when rates drop by at least 0.5–1 percentage point, as long as you plan to stay in the home long enough to recover closing costs.