SAP S/4HANA migration: How to successfully switch from SAP ECC 6.0 to the new ERP generation.

Migrating from SAP ECC 6.0 to SAP S/4HANA – How to make the transition a success.

Digital transformation is increasingly demanding fast, efficient and flexible IT systems from companies. Many organisations are still operating with SAP ECC 6.0 – a proven yet increasingly outdated ERP system. Its successor, SAP S/4HANA, offers not only state-of-the-art technology but also entirely new business opportunities.

But what exactly distinguishes SAP ECC 6.0 from SAP S/4HANA, why is migration necessary, and what should companies consider when making the switch?

Our authors and experts

Pascal Contursi

Digital and sales marketing

Author

Olaf Siefken

Board of directors

Expert
Last updated on 30.10.2025

Differences between SAP ECC 6.0 and SAP S/4HANA:

While SAP ECC 6.0 has served as a reliable ERP system in countless companies for many years, its technical foundations are increasingly reaching their limits. The rising demands for real-time data, automation, and digital connectivity make modern system architectures indispensable.

With SAP S/4HANA, SAP has introduced a new generation built on powerful in-memory technology, making business processes significantly more efficient, transparent and user-friendly. The differences become particularly clear in how data is processed, interfaces are designed, and systems are integrated.

The following comparison highlights the key differences between SAP ECC 6.0 and SAP S/4HANA side by side:

SAP ECC 6.0

  • Uses traditional relational databases

  • Modular system with many separate components

  • SAP GUI as the user interface, often perceived as complex

  • High system complexity due to redundant processes and tables

  • Limited performance when handling large data volumes

SAP S/4HANA

  • Based on the SAP HANA in-memory database with real-time processing

  • Simplified data structures – redundant tables have been eliminated

  • Modern SAP Fiori interface, intuitive and usable across all devices

  • Follows the “Principle of One” – unified functions and reduced redundancies

  • Significantly faster data access and real-time analytics

End of support: Why is it necessary to switch from ECC 6.0?

A key driver for the transition to SAP S/4HANA is the upcoming end of maintenance support for SAP ECC 6.0. Starting in 2027, SAP will discontinue regular support for ECC systems – meaning no more security updates, patches or legally required adjustments. Companies that continue using ECC will therefore face increasing operational and security risks and risk being excluded from future SAP innovations.

However, the move to S/4HANA is far more than a technical necessity – it is a strategic investment in the company’s long-term viability. This next-generation system lays the foundation for digital transformation, end-to-end process transparency, and more agile business models. It allows organisations to simplify workflows, analyse data in real time, and make faster, more informed decisions.

Advantages of SAP S/4HANA at a glance:

  • Future readiness: Continuous development and long-term SAP support

  • Real-time analytics: Instant evaluation of large data volumes for faster decision-making

  • Simplified data structures: Reduced complexity through the “Principle of One”

  • Automated processes: Higher degree of automation and fewer manual interventions

  • User-friendly interface: Intuitive operation thanks to SAP Fiori on all devices

  • Flexibility and scalability: Deployment options include cloud, on-premise, or hybrid models

  • Competitive advantage: Faster response to market changes and customer demands

The switch to S/4HANA is therefore not only a necessary step due to the end of support, but also an opportunity to set up IT and business processes in a future-oriented manner and to strengthen your own competitiveness in the long term.

Every process begins with the first step:

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SAP now offers extended mainstream maintenance for the core applications of the SAP Business Suite 7 – including SAP ERP ECC – until the end of 2027. After that, companies have the option to purchase extended maintenance until the end of 2030.

We support our clients throughout the transition and system consolidation – individually, efficiently, predictably, and cost-effectively.

Everything you need to know about S/4HANA migration

What needs to be considered when switching to SAP S/4HANA?

The switch to SAP S/4HANA is more than just a simple upgrade – it is a comprehensive transformation of the IT landscape and business processes. Important points to consider are:

FAQ: Frequently asked questions about switching to SAP S/4HANA:

How long will SAP ECC 6.0 continue to be supported?

Regular maintenance support for SAP ECC 6.0 will end at the end of 2027. After that, SAP will no longer provide updates, security patches or legal adjustments. Companies that want to continue working with ECC can take advantage of a paid extended maintenance option until 2030, but should start planning their migration early.

What are the key considerations when switching to SAP S/4HANA?

The switch to S/4HANA is not a simple technical upgrade, but rather a comprehensive transformation of the IT and process landscape. In addition to technical requirements, organisational and cultural aspects must also be taken into account.

How can I best prepare my company for the transition?

Thorough preparation and analysis are crucial. The SAP Simplification List shows all changes and functions that are no longer supported. In addition, the Custom Code Migration Worklist helps to check individual code for compatibility with S/4HANA.

What technical requirements must be met?

The source system must be based on at least SAP ECC 6.0 and be Unicode-compatible. If a dual ABAP/Java stack is used, it must be converted to a pure ABAP stack before migration.

What migration routes are there?

There are three proven approaches to choose from:

  • Greenfield: Complete reinstallation of S/4HANA

  • Brownfield: System conversion of the existing ECC system

  • Hybrid: Combination of both approaches, e.g. gradual introduction of new modules

The choice depends on the complexity, objectives and investment framework of the company.

How does data and process migration work?

Data is transferred using specialised SAP tools such as Migration Cockpit. At the same time, business processes should be reviewed and, if necessary, simplified or remodelled. Training and change management are crucial in order to actively involve employees in the transformation.

What are the technical challenges involved in making the switch?

Migration requires careful planning and the use of tools such as SAP Software Update Manager (SUM). Issues such as data quality, system performance, and interface compatibility must be addressed at an early stage.

How does S/4HANA influence the organisation and corporate culture?

S/4HANA is changing not only systems, but also ways of working. Automated processes and real-time data are transforming the way teams work together. A structured communication and training plan supports the cultural shift towards greater transparency and agility.

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When outdated ERP systems reach their limits, it's time to take the next step: switching to SAP S/4HANA.

Real-time data, automated processes and an intuitive Fiori interface create the basis for agile business processes and informed decisions.

Whether greenfield, brownfield or hybrid approach – with the right strategy and a clear roadmap, the transition can be made efficiently, securely and with an eye to the future.

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Conclusion

The transition from SAP ECC 6.0 to SAP S/4HANA represents far more than a technological shift – it is a strategic turning point for companies that want to actively shape their digital future. While ECC provided stability and reliability for many years, S/4HANA establishes the foundation for real-time decision-making, streamlined processes, and seamless integration into modern, connected IT landscapes.

The transformation is undoubtedly complex and requires careful planning. A detailed system analysis, the definition of clear project objectives, and the early involvement of all business units are critical success factors. Moreover, a well-structured change management strategy plays a central role in preparing employees for the transition and fostering acceptance of new ways of working.

Those who approach the transition with determination will benefit in the long term from significantly greater transparency, improved performance, and enhanced scalability of their business processes. Companies that migrate to S/4HANA early secure not only technological future readiness but also competitive advantages in an increasingly digitalised market environment.

In short: the move to SAP S/4HANA is not a risk, but an investment in efficiency, innovation, and growth – and thus a decisive step towards digital excellence.

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