Runs locally
Late Fee Calculator
Calculate a late fee from an overdue amount, a percentage, and the number of days late.
Nothing you enter is uploaded. All processing happens in your browser.
Original overdue$1,200.00
Late fee$18.00
New balance$1,218.00
For estimation only. Always check the maximum late fees and interest permitted in your jurisdiction and contract.
Frequently asked
Is the Late Fee Calculator free to use?+
Yes. Every tool on InvoiceBro is free and runs entirely in your browser.
Is my data uploaded anywhere?+
No. Nothing you enter leaves your device. Calculations and document generation happen locally.
Do I need an account?+
No account is required. Open the tool and start immediately.