Compare two options
Test one change at a time—rate, term, amount, or amortization—to see how the trade-off shows up in monthly payment and term cost.
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Run rate tests
Use one side as your current offer and the other as a better rate scenario to see how quickly the difference becomes meaningful.
Change one variable
This calculator works best when you change one variable at a time so you can clearly see which assumption is driving the result.
Compare term structure
Use it to understand how term length or amortization shifts monthly payment and estimated cost over the selected term.