Why a little extra goes a long way
Mortgage interest tracks the remaining balance. Put extra toward principal and the balance drops ahead of schedule, so future interest is charged on less. Because that saving repeats every remaining month, the payoff dwarfs the extra you actually hand over.
Steady monthly vs one lump sum
A small monthly extra grinds the balance down and is easy to set and forget. A lump sum — a bonus, a tax refund — lands one big drop at once. Both work; the pick comes down to your cash flow and whether you'd rather be consistent or move in occasional big chunks.
| Standard payoff | 30 years |
| With +200/month extra | ~24 years |
| Approx. interest saved | ~95,000 |
Shorten the term, or recast?
Extra payments normally shorten the loan while the monthly amount stays put. Some lenders also offer a recast — after a big principal payment they recompute a lower payment over the original term. A recast eases the monthly squeeze but saves less interest than simply finishing early. Pick based on whether you need breathing room or want to be done sooner.
Before you part with the cash
- Confirm there's no prepayment penalty.
- Keep the emergency fund whole first.
- Weigh the loan rate against what the money could earn elsewhere.
- Clear any higher-rate debt before overpaying a cheap mortgage.
Confirm it hit principal
Tell the lender to apply the extra to principal, then read the next statement. If the balance didn't fall by the full amount, it was probably parked as a future payment or eaten by interest instead.
A quiet gotcha: some servicers apply an “extra” payment to next month's bill rather than to principal. It feels the same but saves you nothing. After your first extra payment, check the statement and confirm the balance actually dropped.
Frequently asked questions
Should extra payments go to principal?
Yes — for interest savings the extra must reduce principal. Check how your lender allocates additional payments.
Can extra payments lower my monthly payment?
Usually they shorten the term instead. A lender recast can lower the payment but requires a separate request.
Is overpaying a mortgage always smart?
Not if you carry higher-rate debt, lack an emergency fund, or could earn more by investing. Weigh those first.
How much time can extra payments save?
It depends on the amount and timing, but a steady monthly extra can remove several years and tens of thousands in interest.
Extra-payment results add the extra to principal each month and re-run the schedule; some servicers treat extra amounts differently, so confirm how yours applies them.
This article is for general education only and is not financial, tax or lending advice. Rates, fees and approval decisions are set by your bank or lender; always confirm figures against an official loan offer before deciding.