Mortgage Payoff Calculator
See how extra payments save you years and thousands in interest
Standard vs. Extra Payment Comparison
Standard Payment
With Extra Payment
How Extra Mortgage Payments Work
When you make an extra payment on your mortgage, it goes directly to the principal — reducing your loan balance immediately. A lower balance means less interest accrues next month, so more of every future payment goes to principal too. This compounding effect accelerates payoff significantly.
Key insight: An extra $200/month on a $300K mortgage at 6.5% saves approximately $68,000 in interest and pays off the loan about 6 years early. The earlier in the loan you make extra payments, the more you save.
Principal paid = monthly payment − interest
New balance = balance − principal paid − extra payment
Strategies to Pay Off Your Mortgage Faster
- Round up your payment — if your payment is $1,847, round up to $1,900 or $2,000. The extra $53–$153/month adds up to thousands in savings.
- Make bi-weekly payments — paying half your monthly payment every two weeks means 26 half-payments (= 13 full payments) per year instead of 12, effectively making one extra payment annually.
- Apply windfalls to principal — tax refunds, bonuses, and inheritances applied directly to mortgage principal can shave years off your loan.
- Refinance to a shorter term — switching from a 30-year to a 15-year mortgage at a lower rate dramatically cuts total interest, though monthly payments will be higher.
- Never skip an extra payment — consistency matters. One extra payment per year for 30 years adds up to 30 extra months of principal reduction.
Frequently Asked Questions
How do extra mortgage payments reduce my loan?
Extra payments go directly to the principal balance. A lower principal means less interest accrues each month — so more of future regular payments also go to principal. This acceleration shortens your loan term and reduces total interest paid.
Do I need to notify my lender about extra payments?
Yes — specify that the extra amount is for "principal only." Without this instruction, some lenders may apply extra money toward next month's payment (which still includes interest) rather than reducing principal directly.
Is there a prepayment penalty?
Some mortgages include prepayment penalty clauses, especially adjustable-rate or older fixed-rate loans. Check your loan documents or ask your lender before making large extra payments.
What is mortgage amortization?
Amortization is how loan payments are split between interest and principal over time. Early payments are mostly interest; later payments are mostly principal. The amortization schedule shows every payment over the full loan term.
Should I pay extra on my mortgage or invest?
Paying extra gives a guaranteed return equal to your mortgage rate. Investing may yield higher long-term returns but involves market risk. If your mortgage rate is above 6–7%, paying down debt is often the better risk-adjusted choice. Below 5%, investing typically wins over the long term.