Debt payoff example
This worked example shows how a recurring payment and optional extra principal can change the payoff path on a $18,000 debt balance.
Calculated answer
With $400 monthly payments and $150 in extra principal, the accelerated schedule reaches payoff in 51 months and saves about $10,635 in interest compared with the baseline payment.
Monthly interest accrues on the balance, then payments and extra principal reduce the debt
The shared debt-payoff math simulates the baseline payment and an accelerated payment with extra principal to compare payoff timing and total interest.
| Year | Contributions | Interest / Growth | Ending Balance |
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A debt payoff plan can look very different when the payment is only slightly above monthly interest versus meaningfully above it.
That is why worked examples are helpful for comparing whether the current payment is merely maintaining the balance or actually accelerating progress.
Use the full calculator to change the balance, APR, payment, and extra-payment strategy.
Open the Debt Payoff Calculator Browse All Debt Payoff ExamplesIf the payment is too low to outpace interest, the model reports that the debt is not paid off under the current assumptions.
No. It assumes no new borrowing, late fees, penalty APR changes, or one-time charges while the balance is being repaid.