Extra payment calculator guide

Extra payments can make a large difference because they reduce principal ahead of schedule. When the balance falls earlier, future interest is calculated on a smaller amount. This can shorten the loan and reduce the total interest paid over time.

Get Loan Calc lets you enter an extra monthly amount and compares the estimated schedule against the regular payment. The result can show interest saved and a faster payoff date, assuming the extra payment is applied to principal every month.

Small extra payments can matter

An extra payment does not need to be large to change the schedule. Even a modest monthly amount can reduce the balance faster on long-term loans. The effect is usually more visible on loans with higher rates, longer terms, or larger balances.

Check lender rules first

Not every lender handles extra payments the same way. Some may apply extra money to future scheduled payments unless you specify principal reduction. Some loans may include prepayment limits or fees. Always check the loan agreement or lender instructions before relying on an extra-payment strategy.

Review the full schedule

The on-page schedule preview shows the first year to keep the page easy to scan. Use the CSV export to review the full schedule, compare payoff timing, and save a copy for your own records.