Late Fee Calculator
Calculate flat or percentage late fees, daily or monthly, and the total now due on an overdue invoice.
Enter your figures
Result
Total now due
$1,030.00
Calculate the late fee on an overdue invoice — a flat charge or a percentage, applied once or accruing daily or monthly — and the new total amount due.
Formula
Percentage fee = Invoice × Rate% × periodsFlat fee = Fee × periodsTotal due = Invoice + Late fee
Example
A $1,000 invoice with a 1.5% monthly late fee that is 60 days overdue accrues 2 monthly periods = $30, for a total of $1,030.
Frequently asked questions
Are there legal limits on late fees?
Yes — many regions cap late fees or interest on overdue invoices. Confirm the maximum allowed in your jurisdiction and state the fee in your contract.
Late-fee and interest limits vary by jurisdiction and contract. This tool only computes a fee you define and is not legal advice.
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