Extra Payment Calculator
See how much time and interest an extra monthly payment actually saves.
Open calculatorBuying a Home
Set the date you want your mortgage gone by, and this calculator works backward to show the payment it takes to get there.
This calculator answers "I want this mortgage gone by a specific date — what payment does that take?" Our Extra Payment Calculator answers the reverse question — "if I add a specific extra amount every month, how much sooner am I done?" Same underlying math, opposite direction: pick this one when you have a deadline in mind, the other when you have a dollar amount in mind.
The calculator finds the fixed monthly payment that brings your current balance to exactly zero by your target month — the standard loan formula, run against a shorter timeline than your original schedule. The gap between that number and what you're paying today is the extra you'd need to commit to.