Estimated monthly outflow
$0Includes your chosen extra payment.Extra Payment Calculator
See how much faster your mortgage could end with extra payments.
Even small recurring extra payments can reduce lifetime interest and shorten a 30-year payoff timeline by years. This calculator shows the monthly and long-term impact in one view.
Interactive Tool
Extra payment mortgage calculator
Model the standard payment, then see how additional monthly payments change the payoff date and the total interest cost.
Principal + interest
$0Required scheduled payment before extras.Total interest paid
$0Total interest with your extra-payment strategy.Payoff date
-When the mortgage could end under this plan.Interest saved with extras
$0How much lifetime interest your plan could avoid.Time saved
0 yearsHow much earlier the loan could be paid off.Payment Mix
Scheduled payment versus extra principal
Amortization Preview
First 12 months
| Month | Payment | Principal | Interest | Balance |
|---|
Ways To Overpay
Popular extra payment strategies
Fixed monthly extra
The simplest approach. Add the same amount every month and let the compounding interest savings build over time.
One extra payment a year
Some buyers mimic a 13th monthly payment by sending bonuses or tax refunds toward principal.
Rate-driven strategy
Extra payments tend to look more attractive when rates are high because the avoided interest cost is larger.
Cash-flow first
Do not overpay so aggressively that you lose emergency liquidity or flexibility for other high-priority goals.
FAQ
Extra payment calculator questions
Do extra mortgage payments really save money?
Yes. Extra payments reduce principal earlier, which reduces the balance that future interest is calculated on and can materially shorten the loan term.
Is it always smart to pay extra on a mortgage?
Not always. It depends on your mortgage rate, emergency savings, other debts, and whether you need more liquidity for near-term goals.
How much extra should I pay each month?
There is no single right amount. The best number is one you can sustain consistently without hurting the rest of your financial plan.