Rekenbox · 2026
Free payment reminder generator
Create a reminder for an unpaid invoice.Your result appears here
Enter the required details. The calculation and standard PDF are free.
Save on this device for free
Understand your result
How this tool works
Enter the original invoice, outstanding amount and a new payment date. Add a personal note if useful. This generator creates a friendly reminder, not a new invoice or formal collection notice.
Common questions
Is this a statutory fourteen-day notice?
No. This is a friendly payment reminder. Do not treat it as evidence that the legal conditions for collection costs are met.
Can I account for a partial payment?
Yes. Enter only the amount still outstanding. Check payments and any credit notes before sending the reminder.
Which details do you need?
- Your business name
- Your address
- Your IBAN
- Customer name
- Customer address
- Original invoice number
- Original invoice date
- Reminder date
- New payment date
- Outstanding amount including VAT
- Personal note
Limits of this tool
- A friendly payment reminder, not a new invoice, notice of default or statutory fourteen-day notice.
Year: 2026 · Version 2026.1
Sources for this tool
- Belastingdienst — factuureisen · calculation source checked 2026-09-04
Prepared by the Rekenbox product team at Winstwaker. The listed source references and calculation version make the method traceable. Report a content error Last updated: 2026-09-04. Rekenbox is a product by Winstwaker. The tool applies a calculation model to your inputs; a result or paid report is not a personal assessment by an adviser.