Mortgage Payoff Calculator – See When You'll Be Debt-Free
See how extra monthly payments or a lump sum shorten your mortgage and cut total interest.
About the Mortgage Payoff Calculator
What is the Mortgage Payoff Calculator?
A mortgage payoff calculator shows what happens when you pay more than the required monthly amount. By paying a little extra toward principal, you reduce the balance faster, shorten the term, and pay far less interest.
Why use this calculator?
Even a small extra payment has an outsized effect because of how amortization works: every extra dollar goes straight to principal, so you immediately stop paying interest on it for the rest of the loan.
How to use it
- Enter your current loan balance, not the original amount.
- Enter your interest rate and remaining term.
- Add the extra amount you can comfortably pay each month.
- Compare the new payoff time and the interest saved.
Formula
Payoff time solved iteratively: each month interest = balance × rate ÷ 12; principal = payment − interest.
Check that your loan has no prepayment penalty before making large extra payments.
Frequently Asked Questions
Should I pay extra on my mortgage or invest the money?
Paying extra gives a guaranteed, tax-free return equal to your mortgage rate. Investing may beat it over the long run but with risk. Many people split the difference and do both.
Do extra payments go to principal or interest?
On a standard mortgage, extra money is applied to principal after that month's interest is satisfied. Always confirm with your lender that the payment is not being held for next month.
What is included in a monthly mortgage payment?
Most payments combine principal, interest, property taxes and homeowners insurance (often called PITI). Some loans also include private mortgage insurance (PMI).
What is PMI and when can I drop it?
Private mortgage insurance is usually required when your down payment is under 20%. You can typically request removal once you reach 20% equity.
Fixed versus adjustable rate — which is better?
A fixed rate keeps the same interest rate for the whole term, giving predictable payments. An adjustable rate starts lower but can rise after the initial period.
How much house can I afford?
A common guideline is that housing costs stay below 28% of gross monthly income and total debt below 36%, though lenders and budgets vary.
What is the difference between pre-qualification and pre-approval?
Pre-qualification is a quick estimate based on self-reported data. Pre-approval is a verified commitment after a lender reviews your finances.
What is the difference between principal and interest?
The principal is the amount you borrow. Interest is the fee charged for borrowing it, shown either as an annual rate (APR) or a periodic rate. Early payments go mostly toward interest; later payments go mostly toward principal.
How does the loan term affect my payment?
A longer term lowers the monthly payment but increases the total interest you pay over the life of the loan. A shorter term raises the monthly payment but costs less overall.
What is an amortization schedule?
It is a table that breaks every payment into its principal and interest portions and shows the remaining balance after each payment.