Mortgage Prepayment vs. Invest Calculator
See the guaranteed savings from extra mortgage payments next to the projected value of investing that same money instead.
Path 1: Prepay
Path 2: Invest
Prepayment savings are guaranteed by contract math. Investment growth uses your assumed return and is never guaranteed — treat the investing figure as one possible outcome, not a promise. Doesn't account for itemized-deduction tax effects or capital gains tax on investment withdrawals.