Overdue Invoice Calculator
Check if an invoice is overdue and how many days past due it is.
Collections start before the due date — send a reminder 3 days prior, on the due date, and 7 days after. This page uses Net 30 from a sample invoice to show overdue status vs today.
Market reference
| Metric | Range | Note |
|---|---|---|
| Reminder 1 | 3 days before | due date |
| Reminder 2 | on due date | friendly |
| Reminder 3 | +7 days | firm |
| Late fee | 1–1.5%/mo | if in contract |
Interactive example — overdue invoice calculator
- Due date
- Sun, May 31, 2026
- Days from invoice
- 30 days
Send invoices with clear due dates
After you calculate the due date, create and send professional invoices in minutes.
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Use our free invoice due date calculator for unlimited scenarios. All calculations run in your browser — no signup, no data upload.
Try free invoice due date calculator →
Frequently asked questions
When should I send a payment reminder?
3 days before due, on due date, and 7 days after if unpaid.
Can I charge late fees?
Only if your contract or local law allows — state it on the invoice.
How do I prioritize collections?
Focus on largest overdue amounts and clients with repeat late payments.