If your business still runs SAP ECC, the clock is now measured in months rather than years. Mainstream maintenance for SAP ERP 6.0 ends on 31 December 2027 — and for most South African organisations, a migration of this size takes longer than the time remaining. This is a practical look at what the deadline means, what your options actually are, and what to do in the next quarter.

What actually happens in 2027

Nothing switches off. Your ECC system will keep running exactly as it does today. What ends is SAP’s mainstream maintenance: no more legal and regulatory patches, no security notes, no support tickets, and no correction instructions for standard code.

For a South African business, the regulatory point is the sharp one. Payroll, tax and statutory reporting change every year. Once SAP stops shipping legal change packages for ECC, keeping your organisation compliant becomes your problem to solve and your cost to carry. SAP has offered extended maintenance at a premium to bridge the gap toward 2030, but it is a holding position that buys time — it is not a destination.

Why one year is less time than it sounds

On the large corporate migrations we have worked on, moving to SAP S/4HANA has rarely taken less than eighteen months from kick-off to go-live. That is not because the technical conversion is slow. It is because the work around it is substantial: cleaning master data, deciding which custom developments still earn their place, retraining users on a completely different interface, and finding a cutover window the business can actually absorb.

Organisations that start scoping now are planning a migration. Organisations that start in mid-2027 are planning an extended maintenance contract instead — and paying for the privilege.

Your three realistic options

1. RISE with SAP, S/4HANA Cloud Public Edition

A fully managed, multi-tenant environment operated by SAP, built on standardised best-practice processes with automatic quarterly upgrades. It suits organisations willing to adopt standard processes in exchange for a lower total cost of ownership and a faster deployment. If your ECC system is relatively close to standard, this is usually the cheapest route to a supported platform.

2. RISE with SAP, S/4HANA Cloud Private Edition

A dedicated, single-tenant environment with far more room for custom configuration. This is the realistic option for organisations carrying years of bespoke ABAP development, or operating under data residency and regulatory constraints that demand more control. We covered the trade-off in detail in RISE with SAP: Public Cloud vs. Private Cloud.

3. Extended maintenance, then migrate

A legitimate choice if a 2027 go-live is genuinely not achievable, but treat it as a deliberate decision with a funded plan attached — not as a way of deferring the question. The cost is real and the migration still has to happen.

What to do in the next 90 days

You do not need a signed programme to make progress. You need enough information to make a funding decision:

• Run a readiness check. SAP’s Readiness Check reports on your custom code, add-on compatibility and simplification items against your live system. It is the fastest way to turn opinion into evidence.
• Inventory your custom code. Most ECC systems carry far more Z-development than anyone remembers, and a meaningful share is no longer executed. Knowing what is genuinely used is what separates a realistic estimate from a guess.
• Decide brownfield or greenfield. Converting your existing system carries your history forward, including the parts you would rather leave behind. A fresh implementation costs more up front and buys a clean process design.
• Assess your data. Master data problems that are survivable in ECC become blocking issues during conversion. This work has a long lead time and can start immediately.
• Plan for the interface change. S/4HANA moves users to SAP Fiori. Underestimating change management is the most common reason a technically successful migration lands badly with the business.

Where we fit

World Link Consulting is a Johannesburg-based SAP partner specialising in RISE with SAP and S/4HANA Cloud migrations, SAP Fiori and mobile solutions, and managed SAP services. We have delivered migrations for large corporate clients and we build custom solutions where standard SAP does not cover a business process — which, in our experience, is where most migration programmes actually get difficult.

If you are scoping your move and want an honest read on what it will take, get in touch. We are happy to walk through your specific landscape before you commit to anything.