Observed arrival · 2026-10-18
Dłużnik.biz turns late invoices into paperwork
A Polish-language calculator for overdue invoices that combines interest, statutory compensation and VAT relief, then helps prepare related documents.
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- Polish businesses handling overdue customer invoices
- Worth noticing
- The sample calculation breaks interest into two rate periods and shows a separate 70-euro compensation amount converted at a stated exchange rate.
Field notes
The form collects invoice amount, due date, VAT rate and debtor type, then displays interest by period alongside compensation and potential VAT relief. A worked example separates two interest-rate periods and gives the exchange rate used for its 70-euro compensation figure. The page also describes turning results into a payment demand, a post-payment interest note or a multi-invoice statement for tax correction; it says the calculation is not saved.
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