Debts

Debt and Late Payment Calculator

Update an overdue debt, calculate late fees and interest, simulate how many months a fixed payment takes to clear the balance and compare two rate scenarios before renegotiating.

4 operationsFinance

4 operations

Updated balance

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Accrued interest

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Fill in the fields and the result appears as you type.

Update a debt

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Amount

Monthly rate (%)

Term in months

Result

Fill in the fields and the result appears as you type.

Update a debt

How this operation works

What it does: Updates an overdue debt with compound interest month by month, showing today's balance and the interest accrued.
What it is for: Checking how much a debt grew before negotiating or accepting a settlement.
When to use it: When the debt has been unpaid for months with contractual interest.
What to fill in: Original debt amount, monthly interest as a percentage and how many months have passed.
Formula: Updated = amount × (1 + interest ÷ 100)^months. Accrued interest = updated − amount.
What each result means: Updated balance is today's figure; Accrued interest is what was added over the period.
Worked example: 2,000 at 3% a month for 10 months: an updated balance of 2,687.83 and 687.83 of interest.

Assumptions: the late fee is a single percentage over the original amount; late interest uses the monthly rate split over 30 calendar days. Index-linked monetary correction, where the contract provides it, should be entered as interest.

A mathematical simulation of the values you entered. It is not a credit offer, a return guarantee or financial advice. Assumptions: the late fee is a single percentage over the original amount; late interest uses the monthly rate split over 30 calendar days. Index-linked monetary correction, where the contract provides it, should be entered as interest.

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