Invoice Due Date Tracker
Track multiple invoices, compute due dates from common payment terms (Net 7/15/30/60, End of Month, or custom days) and see at a glance which invoices are overdue, due soon, or upcoming. Totals show outstanding, overdue and paid amounts. Invoices are saved in your browser's local storage so you can come back to them later — your data never leaves your device.
How to use
- 1
Click Add invoice
Creates a new row with today's date and Net 30 terms. Edit any field by clicking it.
- 2
Fill in invoice details
Enter the invoice number, client name, issue date and amount. Choose payment terms (Net 7/15/30/60, EOM or custom days).
- 3
Read the computed due date
The due date is calculated from the issue date and terms — Net N = issue + N days, EOM = end of the issue month, custom = issue + your N days.
- 4
Track overdue and mark paid
Overdue invoices are highlighted in red. Click the status badge on any invoice to toggle paid/unpaid — paid invoices move to the bottom and are excluded from the outstanding total.
Common use cases
- Track outstanding client invoices and chase overdue ones proactively.
- Project cash flow by listing upcoming invoice due dates.
- Switch between Net 30, EOM and custom terms without recalculating due dates by hand.
- Reconcile monthly — mark everything paid by the end of the month.
Limitations
- This calculator produces an estimate only and is not professional financial, tax or investment advice. Always confirm the underlying formulae with your accountant, bank or financial advisor before making decisions.
- "EOM" is interpreted as the last day of the issue month. Some businesses use "end of the following month" or "10th of following month" — switch to Custom days (e.g. 45) for those variants.
- Data is stored only in this browser's localStorage. Clearing your browser data, using private mode or a different device will lose the list. Export to your accounting system for a permanent record.
- No reminders or notifications — this is a planning view, not a receivables system. Pair it with your calendar for actual follow-ups.
- Multi-currency invoices are not modelled — every invoice is treated as the same currency selected at the top.
Frequently asked questions
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