# Master data in Polish enterprises - report | SNOK

> A SNOK report on master data in Polish companies: consolidation of the MDM market, mandatory e-invoicing (KSeF) as a daily test of customer records, the ERP...

- Source: https://snok.ai/en/resources/master-data-poland-report-2026/

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Report

# Master data in Polish enterprises

A SNOK report on master data in Polish companies: consolidation of the MDM market, mandatory e-invoicing (KSeF) as a daily test of customer records, the ERP migration calendar and what makes clean-up programmes work.

Report · 28 pages, ten chapters · Published: August 2026 · English edition; also available in Polish.

## Key findings

- 1KSeF validates the file against the schema, not whether the buyer tax ID belongs to the right company - an invoice with a mistyped number reaches a different business (individual tax ruling, March 2026).
- 2Mainstream maintenance for SAP ECC ends on 31 December 2027, and according to DSAG (February 2026) 54 percent of surveyed organisations still run ECC or older releases - records are best cleaned up before the S/4HANA conversion, not after it.
- 3Clean-up programmes most often fail on an all-domains-at-once scope and the lack of a data owner; the incremental method works - measurement, golden-record rules and human-approved merging in a single domain.

## What is inside

- The MDM market and acquisitions of the past twelve months
- How KSeF works and what errors in customer records cause
- The ERP migration calendar - DSAG and ISG data
- Poland against the EU - GUS and Eurostat statistics
- Four anti-patterns of clean-up programmes
- The incremental method step by step and a methodology note with sources

## Who it is for

Boards, CFOs, CIOs and data owners in companies preparing a system migration, consolidating subsidiaries or rolling out AI on operational data.

## Related services

## Companion article