How Many SAP Customers Have Migrated to S/4HANA — And How Many Are Left?
- DataLink Dynamics
- Aug 27
- 2 min read
Updated: Sep 2
The push to migrate from SAP ECC to S/4HANA is stronger than ever, fueled by SAP’s 2027 end-of-support deadline for ECC. But how far along is the market in this transition? And how many organizations are still running their legacy ECC environments? Understanding the adoption landscape can help you make informed migration decisions.
S/4HANA Migration Highlights (2025)*
Status | Percentage of SAP ECC Customers |
Completed Migration | 28% - 33% |
Actively Implementing/Transitioning | ~41% |
Evaluating Migration Business Case | ~20% |
Projected Completion by 2027 | ~57% |
Projected Completion by 2030 | ~80% |
*Please note that the percentages shared above are gathered from various research studies. Each study surveyed a different number of customers and employed distinct methodologies for evaluation. Therefore, these figures should be viewed as indicative of overall trends rather than precise measurements.
Migration Progress in 2025
Recent research from leading industry analysts and SAP community sources shows that about 28% to 33% of organizations have already completed their move from SAP ECC to S/4HANA by early 2025. This reflects a steady increase of roughly 10% over the last two years, signaling growing momentum but also highlighting that a sizeable majority remains on ECC.
Another 40% to 41% of SAP ECC users are currently in the implementation or transition phase, actively working through migration projects. This means over two-thirds of SAP customers are preparing for or have started their S/4HANA journey.
Meanwhile, around 20% of companies are still evaluating the business case for migration, weighing cost, complexity, and operational impacts before committing.
What Lies Ahead?
The industry consensus predicts that by the time ECC mainstream maintenance ends in 2027, about 57% of customers will have fully migrated to S/4HANA. Extended support agreements will allow some organizations to stay on ECC beyond this date, but the pressure is mounting.
By 2030, SAP expects migration rates to surge to approximately 80%, with the majority of the remaining customers transitioning over the following decade. These timelines reflect the complex and multi-year nature of ERP transformations.
Making Your Own Decision
If your organization is still running SAP ECC, you’re in good company—but the writing on the wall is clear. The window to prepare and migrate effectively is narrowing. Understanding where you stand compared to the broader ecosystem can shape your business case and migration roadmap.
With these insights, organizations can benchmark their SAP migration progress, understand industry trends, and strategically plan their digital transformation for a future-ready enterprise.
Sources:
SAPinsider SAP S/4HANA Migration Benchmark Report 2025: SAPinsider Report
The True State of S/4HANA 2025 – Basis Technologies: Basis Technologies Blog
Legacy SAP ERP customers still foot-dragging move to S/4HANA – The Register:
SAP ECC to S/4HANA Migration Services & Timeline Guide 2025 – Noel DCosta:
SAP legacy ERP customers still in no rush to adopt S/4HANA – Reddit SAP community:
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