Bad-debt corrections must retain the invoice’s KSeF status in JPK_VAT

Summary

• A creditor applying Polish VAT bad-debt relief must report the adjustment in the JPK_VAT record using the designation corresponding to the original invoice. A KSeF invoice should be identified by its KSeF number, while an invoice issued outside KSeF should generally carry the BFK designation. [edgp.gazetaprawna.pl], [ksef.podatki.gov.pl]
• The distinction applies both when the creditor initially reduces the taxable amount and output VAT after the statutory non-payment period and when it subsequently reverses the relief following payment or disposal of the receivable. The correction should preserve a reliable link to the document originally reported. [edgp.gazetaprawna.pl], [jpk.info.pl]
• Finance teams should ensure that receivables and JPK reporting systems retain the original invoice channel, KSeF number and payment status. Treating all bad-debt entries as generic internal corrections could result in invalid identifiers, JPK validation issues or discrepancies during tax-authority matching. [ksef.podatki.gov.pl]

Extended article

Polish businesses using VAT bad-debt relief must distinguish between invoices issued through KSeF and invoices issued outside the system when reporting corrections in JPK_VAT. The correction does not create a new invoice. Instead, the relevant JPK entry should remain connected to the status and identifier of the original document.

For an invoice issued through KSeF and carrying a KSeF identifier when the JPK file is submitted, the taxpayer should populate the NrKSeF field. For an electronic or paper invoice issued outside KSeF, the relevant designation is generally BFK. Official guidance specifically includes invoices outside KSeF that are subsequently reported in connection with bad-debt relief within the scope of BFK. [ksef.podatki.gov.pl]

The underlying relief remains linked to the statutory non-payment rules. A creditor may reduce the taxable amount and output VAT when the debt has remained unpaid or has not been disposed of for 90 days after the payment deadline, subject to the applicable conditions. The adjustment is reported in the current JPK period using negative amounts and the dedicated bad-debt correction field. If payment is later received, the creditor must increase the taxable amount and output VAT in the period of payment. [jpk.info.pl]

The practical risk is primarily a data-management risk. Some ERP systems generate bad-debt entries as standalone adjustment documents and may not automatically inherit the KSeF number or BFK status from the original invoice. Businesses should therefore confirm that their bad-debt process transfers:

• the original invoice number;
• the KSeF number, where applicable;
• the original issue channel;
• the debtor and payment deadline;
• the 90-day trigger date; and
• any later payment or receivable-disposal event.

A reconciliation should also verify that the relief claimed by the creditor can be matched to the invoice and, where relevant, to the debtor’s corresponding adjustment. This is especially important because KSeF and JPK data make automated cross-checking substantially easier for the tax administration.

Recommended action: update JPK mapping rules so that bad-debt adjustments inherit the original invoice’s KSeF status rather than receiving a default designation.

Read the source article in Dziennik Gazeta Prawna and consult the official KSeF guidance on JPK_VAT invoice identifiers. [edgp.gazetaprawna.pl], [ksef.podatki.gov.pl]

---

---