Invoice Late Fee Calculator
Work out the late fee or interest owed on an overdue invoice.
–
Late Charges
- Interest charge
- Flat fee
- Annual rate
- Interest per day
- Total Due
Invoices
Items you add are saved in this browser.
| Invoice | Late Charges | Total Due | Remove |
|---|
How to Calculate a Late Fee
Late fees are usually either a flat charge, a percentage interest rate, or both, starting after any grace period. This page figures interest by the day on the unpaid amount.
Interest = invoice × monthly rate × 12 × days late ÷ 365
Total late charge = interest + flat fee
Worked Example
Tips
Late fees must be in your contract or invoice terms before the work is done. State laws limit late fees and interest, especially for consumers; this page doesn't check those limits.