E-Invoicing in Poland (KSeF) | Electronic Invoice System & Solutions

KSeF e-Invoicing Specifications & Regulatory Requirements in Poland

  • Transaction Type:
    • B2G and B2B under Poland's national electronic invoice system (KSeF)
  • eSignature Requirement:
    • Mandatory for e-Faktury submissions
  • Network/Portal Requirement:
    • National System of e-Invoicing (KSeF) portal with API integration.
  • Archiving:
    • 10 years
  • Format:
    • XML invoices following FA(3) schema, aligned with Poland e-invoicing standards

Important Dates

KSeF 2.0 API Documentation Published- 30 June 2025

KSeF 2.0 Test Environment- 30 September 2025

Mandatory for Large Taxpayers- 01 February 2026

Mandatory for Other Taxpayers- 01 April 2026

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