Example: Loan balance: $336,000 · Rate: 6.5% · Years remaining: 28 yrs · Extra per month: $250 → New payoff time: 21 years, 6 months.
Time saved: 6 years, 7 months
Interest saved: $106,908
Required payment: $2,173.97
Frequently asked questions
How do I calculate extra payment? Enter your numbers above and the result updates instantly. For example: Loan balance: $336,000 · Rate: 6.5% · Years remaining: 28 yrs · Extra per month: $250 → New payoff time: 21 years, 6 months.
Is this Extra Payment Calculator free? Yes — completely free with no sign-up or paywall. It runs entirely in your browser and keeps working offline; the numbers you enter never leave your device.
How accurate is it? It uses the standard published formula for extra payment. Results are estimates for planning — not financial, tax, medical, engineering, or legal advice.