Usually, making extra principal payments does not automatically lower your required monthly mortgage payment on a standard fixed-rate mortgage. Instead, the additional payment reduces your outstanding balance and can help you repay the loan sooner and pay less interest over time. Your scheduled payment generally remains based on the original loan terms unless the mortgage is formally recast or otherwise modified. A mortgage recast, when available, can use a substantial principal reduction to recalculate the required payment over the remaining term, but it is different from simply making extra payments. If your primary goal is to reduce the required monthly payment, ask your lender whether recasting is available and what conditions apply. If your goal is to become debt-free sooner, additional principal payments may be more directly useful. You can use a mortgage payoff calculator to estimate how extra principal could affect your payoff timeline and interest costs.
