Loan Prepayment Penalty Calculator
MathCompute the dollar penalty cost of paying a loan off early, given the payoff balance and a prepayment penalty structure (a flat percent of balance, or a fixed number of months of interest)
Paying off a loan early can come with a real cost most refinance-or-payoff comparisons forget to line-item: a prepayment penalty. Enter the loan's remaining payoff balance and pick the penalty structure your lender actually uses, either a flat percent of that balance or a fixed number of months of interest at the loan's annual rate, and get back the dollar penalty, its effective percent of the balance, and the total cost to close the loan out today. It's distinct from the Loan / Mortgage Calculator and the Loan Refinance Break-Even Calculator, neither of which prices this penalty on its own, so pair this with the refinance calculator when the penalty needs to factor into a bigger decision. This is pure arithmetic on the numbers you supply: no amortization schedule, no live rate feed, and no opinion on whether paying it is worth it.
How to use Loan Prepayment Penalty Calculator
- 1.Enter the loan's remaining payoff balance.
- 2.Pick the penalty structure your lender uses: a percent of the payoff balance, or a fixed number of months of interest at the loan's annual rate.
- 3.Read off the penalty amount, its effective percent of the balance, and the total cost to pay the loan off today.
Frequently asked questions
Use via API, SDK, or MCP
cURL# Free: 1,000 req/day · Pro: 10,000 req/day
curl -X POST https://api.utilix.tech/v1/tools/loan-prepayment-penalty-calculator \
-H "Authorization: Bearer utx_live_..." \
-H "Content-Type: application/json" \
-d '{"payoffBalance":250000,"penaltyType":"percent-of-balance","penaltyPercent":2,"monthsOfInterest":3,"annualRatePercent":6}'Get an API key from your dashboard · Full API docs →