About this calculator
About Mortgage Early Payoff
Clear mortgage math, without a sales pitch.
Mortgage Early Payoff is an independent, free web calculator for homeowners who want to understand what recurring extra principal or a one-time payment could change.
Published August 1, 2026 · Last reviewed and updated August 3, 2026
Why this site exists
Mortgage decisions are already complicated. A basic payoff comparison should not require an account, a sales call, or handing over loan details before seeing an answer. This site keeps the useful part in the foreground: enter a remaining balance, fixed rate, remaining term, and optional extra amount, then see the comparison immediately.
The calculator is built as an educational planning tool, not a lead-generation form. It is not a lender, mortgage broker, loan servicer, financial adviser, tax adviser, or law firm, and it is not affiliated with the Consumer Financial Protection Bureau. Official consumer sources are linked so you can distinguish the calculator’s model from loan-specific rules.
What the calculation does
The model creates an original and accelerated principal-and-interest schedule month by month. It applies interest to the opening balance, credits scheduled principal, then credits the recurring extra amount and any selected lump sum. The comparison reports the estimated payoff date, total interest, time saved, and accelerated amortization schedule.
Real mortgage servicing can differ. Adjustable rates, daily-interest conventions, payment posting, escrow, fees, modifications, and prepayment terms are outside this V1 model. Your mortgage statement and a dated payoff quote from your servicer remain the controlling sources for an actual transaction.
Review methodology and sourcesPrivacy is part of the product
The mortgage figures you type are processed in your browser for the current visit. The calculator does not require an account and does not upload those figures to a database. As with any website, the hosting and security infrastructure may process ordinary request information needed to deliver the page; the Privacy Policy explains that boundary in detail.
Questions and corrections are welcome
If you find a calculation issue, an unclear assumption, an accessibility problem, or a source that should be corrected, use the support email below. Please do not send Social Security numbers, bank details, loan account numbers, or other sensitive financial information.
Use the calculatorSupport email