Calculator Inputs
Example Data Table
| Invoice | Amount | Policy | Due Date | Paid Date | Late Days | Late Fee |
|---|---|---|---|---|---|---|
| INV-1001 | USD 1,250.00 | Daily simple 0.20% | 2026-02-01 | 2026-02-11 | 10 | USD 25.00 |
| INV-1002 | USD 3,800.00 | Hybrid 35 + 2% | 2026-01-20 | 2026-02-03 | 14 | USD 111.00 |
| INV-1003 | USD 900.00 | Fixed once | 2026-02-05 | 2026-02-05 | 0 | USD 0.00 |
| INV-1004 | USD 2,500.00 | Monthly 5% | 2026-01-01 | 2026-03-02 | 60 | USD 250.00 |
Formula Used
Late days are counted after the due date plus any grace days.
Grand total equals invoice amount plus late fee plus any tax applied to the fee.
How to Use This Calculator
- Enter the invoice number, client name, and currency code.
- Type the invoice amount and choose the due date.
- Select the actual payment date or the expected payment date.
- Add grace days if your contract allows a penalty-free buffer.
- Choose the fee policy that matches your freelance agreement.
- Fill in the related fee fields such as fixed amount or rates.
- Set optional minimums, caps, and tax on the fee.
- Press the calculate button to show the result above the form.
- Use the export buttons to save the breakdown as CSV or PDF.
FAQs
1. What does this calculator measure?
It estimates the late fee owed on an overdue freelance invoice. It also shows late days, policy details, tax on fees, and the revised total amount due.
2. Can I use a flat fee instead of a percentage?
Yes. Choose the fixed fee option when your contract charges one set amount after the invoice becomes overdue. The calculator then ignores percentage-based fields.
3. What is a hybrid late fee?
A hybrid fee combines a flat charge and a percentage charge. Freelancers often use it when they want a minimum penalty plus a proportional fee on larger invoices.
4. How are grace days handled?
Grace days extend the penalty-free window after the due date. Late days begin only after that grace period ends, which prevents accidental overcharging.
5. What is the difference between daily simple and compound fees?
Daily simple fees grow linearly using the same daily rate on the original invoice amount. Daily compound fees grow faster because each day builds on the prior balance.
6. Why would I use a minimum or maximum fee?
A minimum fee prevents very small penalties on low-value invoices. A maximum cap keeps the late charge within contract limits and helps you stay consistent.
7. Does this page calculate legal compliance?
No. It performs financial math only. You should still confirm that your late-fee policy matches your client contract, local law, platform rules, and invoicing terms.
8. Can I save the results for records?
Yes. After calculating, use the CSV button for spreadsheet records or the PDF button for a shareable summary that can be attached to your billing files.