SAP ERP Mainstream Maintenance ends in 2027. How companies can implement their S/4HANA migration in a structured, low-risk, and predictable manner with the Manage Now Transcelerator.

S/4HANA Migration: 2027 is Closer Than Most SAP Managers Believe

2027 still sounds like a date with a buffer. But anyone who looks at the project durations of real S/4HANA migrations knows: the buffer has long since evaporated. With the end of SAP ERP Mainstream Maintenance, one of the biggest IT transformation projects of the coming years is inevitably approaching for many mid-sized companies and corporations. The paid Extended Support extends until 2030, but those who wait until then pay a premium, both financially and in terms of risk.

However, the actual problem rarely lies solely in time pressure. It lies in the complexity that has grown over years: convoluted system landscapes, deeply rooted custom developments, dependencies that hardly anyone fully comprehends anymore. It is precisely this complex interplay that turns a supposedly technical conversion into a project that affects processes, organization, and governance equally. And because more and more companies are migrating simultaneously, the market for experienced migration partners is noticeably tightening.

Why Waiting is the More Expensive Option

As Mainstream Maintenance expires, not only do the operating and maintenance costs of existing ERP systems increase. Security and compliance risks also rise, while access to new SAP innovations becomes increasingly restricted. Investing today in a system that SAP is only minimally developing further means investing in stagnation.

At the same time, migration involves much more than just fulfilling an obligation. If approached correctly, it is an opportunity to streamline overgrown process landscapes, establish end-to-end processes, and sustainably reduce operating expenses. S/4HANA, in combination with the SAP Business Technology Platform, also creates the technical basis for everything that comes next, from AI-driven processes to automation through RPA.

What Truly Makes a Migration Successful

Experience from numerous S/4HANA projects reveals a recurring pattern: failures or delays almost never arise from the technology itself, but from a lack of preparation. Insufficiently analyzed custom code, underestimated efforts for third-party system integrations, missing resources in IT and business departments, unclear target definitions. All of this can be avoided if transparency regarding the system, contract, and infrastructure situation exists from the outset, and the entire SAP ecosystem, including connected third-party systems, is evaluated.

The Manage Now Transcelerator: Structure Instead of Gut Feeling

This is precisely where the Manage Now Transcelerator comes in. Instead of considering technology, business departments, and project management separately, the methodology connects three workstreams from the start to form a well-founded preliminary study: the technical workstream with system analysis, platform evaluation, simplification check, and custom code analysis; the functional workstream with evaluation and prioritization of business processes; and project management, which defines time and cost frameworks and plans change and quality assurance measures.

Based on this, implementation follows, either classically or agile, depending on company size, complexity, and strategic goals. Four phases structure the path: preliminary study and readiness check, conception and design with selection of the appropriate transformation approach between Greenfield, Brownfield, and Selective Data Transition, the actual implementation including automated custom code migration, and finally testing, training, and go-live with cutover planning and hypercare phase.

Custom Code as the Biggest Risk Factor, Solved at a Fixed Price

Hardly any factor causes delays in S/4HANA projects as reliably as underestimated custom code. This is precisely why Manage Now developed the S/4 Custom Code Engine, or SCCE for short. It automatically converts custom developments to HANA and S/4HANA-compatible code, at a fixed price and with full transparency regarding scope and effort. The result: noticeably shorter project durations and predictability in terms of time and costs that classic migration approaches rarely offer in this form.