Mortgage Payoff Early Calculator
Calculate how extra mortgage payments reduce your payoff date and total interest. See exactly how much you save by adding $100, $200, or $500 per month to your mortgage payment.
Pay Off Your Mortgage Years Early
Enter your remaining mortgage balance, interest rate, and current monthly payment. Add an extra payment amount to instantly see how many years earlier you'll be debt-free and how much interest you'll avoid.
- Payoff acceleration: How many months/years earlier the loan ends with extra payments
- Interest savings: Total interest avoided over the remaining loan life
- Amortization schedule: Month-by-month principal and interest breakdown
- One-time lump sum: Impact of a single extra payment vs. recurring monthly additions
How Much Extra Payment Makes Sense
- $100/month extra: On a $300,000 mortgage at 7%, saves ~4 years and ~$60,000 in interest
- One extra payment/year: Making 13 payments annually instead of 12 shaves roughly 4–5 years off a 30-year mortgage
- Bi-weekly payments: Paying half the monthly amount every two weeks results in 26 half-payments (= 13 full payments) per year automatically
- Lump sum windfalls: Applying a tax refund or bonus directly to principal has an outsized effect early in the loan when the balance is highest
Before Making Extra Mortgage Payments
- Check prepayment penalties: Most modern mortgages have no prepayment penalty, but verify with your lender — some older or non-QM loans do
- Specify principal-only: Explicitly instruct your lender to apply extra payments to principal, not toward next month's payment
- High-rate debt first: Credit card debt at 18–24% should be paid before making extra mortgage payments at 6–7%
- Emergency fund first: Maintain 3–6 months of expenses in liquid savings before locking extra cash into home equity
Frequently Asked Questions
Does paying extra principal every month actually reduce interest?
Yes — mortgage interest accrues daily on the outstanding principal balance. Every dollar of extra principal payment immediately reduces the balance on which future interest is calculated. Because a 30-year mortgage is heavily front-loaded with interest (especially in years 1–10), even modest extra payments made early have a disproportionately large effect on total interest paid.
Is it better to pay off my mortgage early or invest the difference?
At current mortgage rates of 6.5–7.5%, paying down the mortgage is a guaranteed after-tax return equal to the rate. The long-run stock market has historically returned ~7% inflation-adjusted, but with volatility. If your mortgage rate exceeds your expected after-tax investment return, payoff wins. If you have a 3% pandemic-era mortgage, investing likely beats it. Many people split the difference for both debt reduction and wealth building.
How do I make sure extra payments go to principal?
When paying online, look for a "principal only" or "additional principal" field — use it rather than just paying more on the regular payment amount. If paying by check, write "apply to principal" in the memo line. Call your servicer to confirm their process — some require a separate check or specific notation to correctly apply extra funds to principal rather than advancing your next payment due date.