E-Faktury | E-Invoicing in Poland | Electronic Invoice KSeF

KSeF eInvoicing Specifications

  • Transaction Type:
    • B2G, B2B
  • eSignature Requirement:
    • Yes
  • Network/Portal Requirement:
    • National System of e-Invoicing (KSeF)
  • Archiving:
    • 10 years
  • Format:
    • Xml following FA3 schema

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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