H4S4 or wait and see? Is H4S4 the only solution after SAP HCM maintenance ends?

The honest answer to the question of change.

The end of maintenance for SAP® HCM 2030 presents many companies with a strategic dilemma: switch to SAP H4S4 immediately or stick with the existing system for a few more years? The decision is complex—because it’s not just about technology, but also about the central question: How can you make your HR landscape stable, efficient, and, above all, future-proof in the long term?

The risk of waiting is real: those who continue to rely on SAP HCM risk increasing maintenance costs, growing security gaps, and mounting compatibility issues with each passing year. Without regular updates, the platform will become a technological dead end.

We have analyzed the three main options for you in detail and will show you the advantages and disadvantages.

Option 1: Wait and see – convenient in the short term, costly in the long term

At first glance, waiting seems like the most cost-effective solution: your SAP HCM is running smoothly, there are no project costs, and no change management. But this supposed security is deceptive.

The hard facts about the end of maintenance:

  • SAP will only offer regular support for on-premise HCM until 2027.
  • After that: Extended Support contracts subject to a fee with significantly higher maintenance costs
  • No more functional enhancements – your system becomes a legacy solution
  • Security updates are becoming less frequent and more expensive

The risk: If you don’t plan now, you will almost certainly have to switch under time pressure later. Experience shows that “emergency migrations” cost 30-50% more than planned projects and leave little room for individual adjustments. And who wants that?

Additional complexity: Modules are being phased out gradually, making integration with other SAP products more difficult. What works today may lead to system failures tomorrow.

 

Option 2: Switching to SAP H4S4 – An investment in future security

SAP H4S4 is more than just “HCM in a new guise” – it is the basis for a modern, integrated HR landscape with long-term prospects.

Specific advantages of the technology:

  • Support until 2040: 10 years longer planning security than with traditional HCM
  • SAP HANA in-memory technology: Significantly accelerates complex HR analyses and reporting—often by a factor of 10 or more, depending on the use case and initial situation.
  • Fiori compatibility: H4S4 enables the use of modern Fiori apps for an intuitive, mobile user interface – significantly higher user acceptance than with classic SAP interfaces.
  • Seamless S/4HANA integration: HR becomes a genuine part of the digital process chain – from finance to controlling

The critical success factor – data conversion/system transformation: The biggest challenge is transforming sensitive HR data securely while day-to-day business continues. This is what determines whether the project will be a success or a stress test. Experienced consultants with a proven concept are indispensable here.

Investment vs. costs: Yes, H4S4 requires a budget. But compared to rising maintenance costs, emergency migrations, or system failures, the investment often pays for itself after just 2-3 years.

 

Option 3: Long-term, targeted conversion to SuccessFactors (cloud)

The path to the SAP SuccessFactors Cloud is not an ad hoc decision, but rather a strategic transformation process—with the opportunity to not only secure the HR landscape, but also align it for the digital future.

We recommend a three-step strategy for sustainable change:

  • Step-by-step migration instead of a big bang: Companies can first outsource individual HR modules (such as recruiting, learning, or compensation) in a targeted manner and gain experience in cloud operations. This modular approach allows change management and technology adjustments to be driven forward in a controlled manner without moving the entire personnel administration to the cloud in one fell swoop.
  • Data and process harmonization: Modernizing the HR landscape is the perfect opportunity to streamline processes, drive standardization, and increase the level of digitization. Workflows, self-services, and reporting are being redesigned with the future in mind.
  • Payroll as a special case: For companies with high data protection requirements or complex payroll accounting, payroll can continue to be operated on-premises (e.g., via H4S4) in a hybrid model—while all other HR processes are already cloud-based.

Advantages of this approach:

  • Maximum future security through consistent focus on SAP innovations
  • Continuous HR development through quarterly cloud updates and new AI features
  • Flexible design and global scaling for international requirements or new business models
  • Sustainable reduction in operating costs by eliminating old on-premise components and reducing individual in-house developments

Typical challenges & success factors:

  • The cloud represents a fundamental cultural shift in HR and IT – change communication and support are essential
  • Integration with SAP ERP/S/4HANA must be carefully planned and implemented
  • A cloud readiness analysis at the outset makes the transformation journey predictable and secure.

A targeted, well-prepared transition to SuccessFactors is the most sustainable investment in the digital competitiveness of the HR landscape. It allows for agile adaptation to new markets and working environments without taking short-term risks—and positions HR as a driver of innovation within the company.

Conclusion: It depends on your individual situation.

The honest answer: there is no one-size-fits-all strategy. Your decision depends on your industry, data protection requirements, budget, and strategic orientation.

But the facts are clear:

  • If you need planning security, H4S4 is the only choice
  • Those who wait too long will pay significantly more later: higher maintenance costs, unplanned projects, possible system failures.
  • Act now to maintain control over your schedule, budget, and strategy.

Want to know how H4S4-ready your current system is? Our free readiness check will give you an informed assessment in no time—including a roadmap and budget framework.