By the end of 2024, only 39% of the roughly 35,000 SAP ECC customers worldwide had migrated to S/4HANA. As the 2027 end-of-mainstream-maintenance deadline closes in, even the most recent numbers show the gap hasn’t closed as fast as expected: 55% of organizations report S/4HANA deployed, but only 34% have fully transitioned off legacy systems. That gap between “deployed” and “transformed” is where most of the real value and most of the risk actually lives.

The deadline changed the conversation, but not the outcome that matters.

For years, the 2027 cutoff was the primary driver of migration decisions. That’s shifting: 43% of organizations now cite SAP’s AI capabilities, ahead of the deadline itself at 39%, as the top factor shaping ERP strategy. That’s a meaningful signal; it means more organizations are approaching S/4HANA as a business-value decision rather than a compliance deadline. But it also raises the bar. A system migrated for compliance can succeed by simply going live. A system migrated for AI-driven decision-making has to actually change how finance, supply chain, and operations teams work and that’s the part most programs underestimate.

The technical project and the transformation project run on different clocks.

A full ECC-to-S/4HANA migration typically spans 18 to 36 months for large enterprises, and organizations starting later face real timeline compression, with consulting rates expected to spike 10-20% in the final planning window and S/4HANA talent demand projected at three times available supply by 2027. But the technical cutover data migration, custom code remediation, Fiori rollout is only the visible half of the work. The harder half is redesigning processes to actually use what the new architecture enables: real-time HANA analytics instead of batch reporting, embedded AI instead of static dashboards, and role-based workflows instead of transaction-code navigation inherited from ECC.

Organizations that treat this as “the same processes on new infrastructure” leave the value on the table.

That’s the pattern behind projects that go live technically successful but deliver underwhelming business results. Skipping process redesign because “the old way still works in the new system” is the single most common way enterprises turn a transformation budget into a very expensive lift-and-shift. Research backing well-executed S/4HANA transformations shows measurably different outcomes including inventory turnover improving 2.8x faster when the migration is paired with genuine process redesign rather than a like-for-like technical replatform.

This is exactly where implementation discipline separates a compliant go-live from a genuine transformation.

A migration plan built around data cutover dates alone will hit the deadline. A migration plan built around how finance actually closes the books, how supply chain actually plans, and how operations actually makes decisions is what delivers the intelligent, data-driven operating model S/4HANA was built to enable. At Lean IT, we scope every S/4HANA engagement around both  technical migration and the process redesign that makes it worth doing.

If your S/4HANA roadmap is still built around the deadline instead of the transformation, let’s change that.

Schedule a consultation call with Lean IT today.