Beyond 2027 – How Enterprises are Handling ECC to S/4 HANA Migrations
The Urgency of 2027
With the official 2027 ECC sunset approaching, organisations face mounting pressure to plan and execute their S/4HANA migrations. The countdown is real, and companies must carefully evaluate whether to pursue a full system conversion, a selective data transition, or a hybrid approach.
Decisions around deployment models – on-premise, Private Cloud, or Public Cloud carry significant implications for total cost of ownership, resource allocation, and long-term digital strategy. Delaying these decisions can lead to escalating project complexity, budget overruns, and misalignment with enterprise-wide transformation goals.
Industry Readiness: Who’s Ahead and Who’s Behind
Certain sectors, including manufacturing, high-tech, and pharmaceuticals, have embraced early adoption strategies, leveraging S/4HANA and cloud-native capabilities to streamline end-to-end operations, improve real-time data visibility, and enable predictive analytics. In contrast, public services, traditional retail, and utilities are often constrained by intricate legacy architectures, extensive custom code, and limited internal SAP expertise.
Understanding where an industry sits in terms of readiness is crucial for establishing realistic migration timelines, resource planning, and expected return on investment.
Effective Strategies in Practice
Successful migrations are rarely achieved overnight and require a methodical, phased approach. Many organisations begin with core Finance (FI/CO) and Supply Chain (MM/SD) modules to establish standardised processes before addressing more complex customisations.
Critical considerations include assessing ABAP custom code for S/4HANA compatibility and optimising or rewriting key extensions, defining a robust data strategy to determine which historical data should be migrated, archived, or transformed, and evaluating deployment models in terms of scalability, security, compliance, latency, and cost.
Running pilot migrations within smaller business units or regions allows teams to validate process flows, integration points, and reporting capabilities before scaling across the enterprise. This phased methodology mitigates risk while maintaining operational continuity.
Hidden Risks of Procrastination
Delaying migration introduces a range of technical and strategic risks that are easy to underestimate. Support for ECC systems diminishes over time, making security patching and integration with modern applications increasingly challenging. The scarcity of consultants with deep ECC experience can inflate costs and extend project timelines.
Organisations that postpone adoption also potentially risk missing out on embedded AI, predictive analytics, SAP Fiori user experiences, and other cloud-native innovations that enhance operational efficiency and decision-making. In short, procrastination can leave companies both operationally exposed and competitively disadvantaged.
Looking Ahead – Preparing for a Smooth Transition
A pragmatic and technically rigorous approach begins with a thorough assessment of the current system landscape, including ECC instances, custom code, and third-party integrations. Defining a clear migration roadmap with phased timelines and risk mitigation strategies ensures that business operations remain uninterrupted. Early engagement with business units and vendors helps align cloud strategies with enterprise objectives, while upskilling IT and functional teams on S/4HANA capabilities, Fiori interfaces, and cloud operations reduces the learning curve.
By taking informed, measured steps, organisations can minimise disruption, optimise migration costs, and position themselves to fully exploit the advanced capabilities of S/4HANA well beyond 2027.