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Poland: B2B e-invoicing requirement becomes mandatory (KSeF)

The Ministry of Finance of Poland is switching to stricter e-Invoicing requirements by making B2B mandatory. Poland already introduced their interest in e-Invoicing some years ago by building the PeF platform for voluntary B2G E-Invoicing. Now, Poland will no longer accept paper invoices for B2B transactions in the future.

Important update:

Poland’s Ministry of Finance has recently released updated timelines for the implementation of B2B E-invoicing. The revised schedule is as follows:

  • Starting from 1st February 2026: Large taxpayers with an annual turnover of €43 million or more.
  • Starting from 1st April 2026: All other taxpayers.

These deadlines provide clarity and ensure a smooth transition for businesses towards adopting electronic invoicing practices in Poland.

For more information about the announcement, please refer to the official government website of Poland: Link

The Krajowy System e-Faktur to platform (KSeF) will be used as the national Electronic Invoicing system. Meaning all electronic invoices must be exchanged through the KSeF platform for validation. 

How will the KSeF be working? 

  • This platform will issue a series of notifications that will inform users of, for example, time stamps, invoice rejection, etc. 
  • Invoices can be searched and downloaded in the original format or PDF format.
  • eInvoices are archived for 10 years in the KSeF platform. 
Update e-invoicing requirements Poland

SAP's Document & Reporting Compliance solution for Poland B2B e-invoicing

SAP released the solution for S4HANA cloud 2302, S4HANA on Premise, and ERP system. Here, an XML file must be sent to the KSeF platform, and SAP will use the Document & Reporting Compliance solution to comply with the Polish e-Invoicing requirements. This solution can process customer and supplier eDocuments.

How will the Polish B2B solution for customer invoice work?

When the source document is created in SAP, an eDocument (XML) is generated in the cockpit automatically. Here, you can search for the country, Poland, and select and submit the generated document. You will receive a status back from the KSeF platform in real time.

SAP Polish B2B invoice process
  • An accepted status means that the eDocument is approved by the government. 
  • A rejected status means that there is a fault in the document, and research must be done to solute this. After finding the solution, you can resubmit the eDocument, after which you receive a status back from the KSeF. 

The supplier will create an invoice and send it to the KSeF portal. When the KSeF portal has received the document, you can pull it from the portal into your SAP eDocument cockpit. You can see the incoming document in the cockpit, and the status of the eDocuments will change when the government has updated the eDocument in the KSeF portal.

SAP Polish B2B document process

How could PIKON help you?

With our Competence Center for Legal Requirements, we are a strategic partner who ensures that your SAP system and business processes meet different country-specific legal requirements in the long run. We have a team of experts that combine SAP expertise and in-depth knowledge of the end-to-end legal process as well as technical requirements of e-Invoicing and e-Accounting regulations all over the world. 

We have gathered this experience through our many SAP Document & Reporting Compliance and local implementation projects all around the world. Some examples are SDI in Italy, SII in Spain, CFDI and Complemento de Pago in Mexico, RTIR and EKAER in Hungary, XRechnung in Germany, the different legal requirements in Turkey, etc. We have also developed our own compliance SAP Add-Ons e.g. MTD VAT in the UK and the VAT Whitelist in Poland.  

Furthermore, we always keep an eye on new and changing legal requirements and inform our customers when action is needed. This ensures that your company doesn’t need to follow up on all the legal requirements yourself, and you can concentrate on your daily business.

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Do you have any further questions about Poland´s legal requirements?

Simply fill out the contact form or leave us a comment at the end of the article.

Tommy Beckers
Tommy Beckers
Managing Partner PIKON Benelux NV

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About the author
Myriam Alicata
Myriam Alicata
I am active as a SAP ERP Consultant at PIKON Benelux in Genk, Belgium. My focus is on the SAP SD and MM modules. Within our PIKON group, I am part of the Competence Center for Legal Requirements. With my knowledge and experience gathered through different customer projects, I aim to find the right solution for our customers.

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