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KGT Partnership

Accelerated Poland KSeF Go-Live Through a Phased Implementation

A multinational organization began its preparation for KSeF compliance at a very late stage, during the third week of January 2026, just days before the mandatory go-live date of 1 February 2026.

1

Challenge

The Poland scope included multiple complex workstreams. Delivering all these components simultaneously before the legal deadline posed a significant timing and execution risk, potentially jeopardizing compliance and operational continuity.

  • Outbound customer invoices (including optional fields)
  • QR code integration for PDF invoices
  • Updating accounting documents with KSeF number and response details
  • Inbound vendor invoice integration with KSeF
  • Self-billing processes
  • Incoming invoice VIM integration in SAP

KGT's Solution

KGT immediately mobilized a multidisciplinary project team, enabling the project to move at speed without losing control. The team combined Polish tax expertise, end-to-end understanding of finance and business processes, SAP process and integration knowledge, and deep expertise in tax digitalization and regulatory change. KGT proposed a phased implementation strategy, aligned with the client and focused on ensuring legal compliance first. Mandatory components — outbound customer invoices (mandatory XML fields only), inbound vendor invoice integration with KSeF, and self-billing functionality — were successfully delivered by 1 February 2026. Additional elements were scheduled immediately after go-live: VIM integration for incoming invoices delivered mid-February, and QR code and accounting document updates delivered within two weeks after go-live. The solution also enabled the client to apply these enhancements to previously submitted e-invoice documents.

3

Results

  • Mandatory KSeF requirements delivered on time despite late project initiation
  • Rapid project mobilization enabled by early involvement of a multidisciplinary KGT team
  • Stable and compliant invoice flows at go-live
  • Business enhancements delivered shortly after without impacting compliance

Impact

This case highlights how KGT's integrated tax, SAP, and regulatory expertise enables successful e-invoicing implementations even under extremely tight timelines.

  • Successful KSeF go-live under severe time pressure
  • Reduced implementation and compliance risk through phased delivery
  • Clear prioritization between legal requirements and business enhancements
  • High stakeholder confidence in a complex regulatory environment
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