1. The Reality Check

Most homeowners will pay more in interest over a 30-year mortgage than the original price of the home. Paying even a little extra toward principal early can shave years off your loan and save tens of thousands in interest.

2. Plain English Definition

Mortgage payoff calculations show how extra payments toward your loan principal accelerate your payoff date and reduce total interest, since less principal means less interest accrues on future payments.

3. Why Early Payments Matter So Much

In the early years of a mortgage, the vast majority of your payment goes to interest, not principal — that's how amortization works. Extra payments made early attack the principal directly, which compounds savings for the rest of the loan's life.

4. Key Terms

• Amortization: The schedule showing how each payment splits between principal and interest over time.
• Extra Principal Payment: Any amount paid beyond your required monthly payment, applied directly to the loan balance.

5. Next Steps

Try adding just $100-200/month extra in the calculator above and see how many years it shaves off a 30-year mortgage.