A past-due invoice template and reminder letter for collecting on bills clients haven't paid. Download it free in Word, Excel, PDF, Google Docs, or Google Sheets - it restates the original invoice with a clear PAST DUE label, the days overdue, and any late fees, and pairs with ready-to-send email wording. A firm, professional overdue notice often recovers payment faster than a phone call.
Use InvoiceSonic's free generator — auto-calculate tax, prefill your details, and email the PDF straight to your client. No formatting needed.
Try the live generator →| Description | Qty | Unit price | Amount |
|---|---|---|---|
| Original invoice #1042 (balance outstanding) | 1 | $1,085.00 | $1,085.00 |
| Late fee - 1.5% per month on overdue balance | 1 | $16.28 | $16.28 |
| Second late fee (if 60+ days overdue) | 1 | $16.28 | $16.28 |
| Returned payment / NSF fee (if applicable) | 1 | $25.00 | $25.00 |
| Credit for partial payment received | 1 | $-300.00 | $-300.00 |
| Subtotal | $842.56 | ||
| Sales tax (8%) | $67.40 | ||
| Total | $909.96 | ||
Example figures — every field is editable in the download.
Fully editable in Microsoft Word, Google Docs, Apple Pages and LibreOffice — best for quick text edits.
Line totals, subtotal and tax calculate automatically — best if you want the math done for you.
A clean, print-ready, fixed layout — best for emailing a finished invoice to a client.
Open in your browser, then File → Make a copy to edit and share with your team.
A common rate is 1.5% per month (about 18% annually), but only if you stated it in your original terms or contract. Some states cap interest rates on commercial debts, so check your state's limits before applying a fee.
Restate the invoice number, original amount, and due date; note how many days it's overdue and the total now owed including any late fee; and give clear payment instructions. Keep the first reminder polite, then firm up the tone if it stays unpaid.
A typical sequence is a friendly reminder around the due date, a firmer notice at 15-30 days past due, and a final demand at 45-60 days stating you'll pursue collections or small claims. Document each one in writing.
Options include pausing further work, sending a formal demand letter, using a collections agency, or filing in small claims court (limits vary by state). Your invoices, contract, and overdue notices form the evidence you'll need.
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