The deadline every SAP customer faces
SAP has announced that standard support for SAP ECC ends on 31 December 2027. After that date, staying on ECC means:
- No more security patches or legal/tax updates
- Growing compliance and audit risk
- Ever-increasing extended-maintenance fees
Every company running SAP ECC must eventually move to S/4HANA. The question is not if — it is when and how.
What happens after 2027?
SAP offers extended maintenance, but it is expensive and escalates every year. The longer you wait, the more you pay — while your compliance risk keeps growing. Most enterprises plan a 2 to 3-year runway to assess, prepare, and migrate.
A realistic migration timeline
| Phase | Duration | What happens | |
|
|
| | Discovery & Assessment | 2–4 weeks | Readiness Check 3.0, custom-code (ABAP) analysis, full inventory | | Planning & Sizing | 2–4 weeks | System sizing, budget model, go-live strategy | | Sandbox rehearsal | 4–8 weeks | Full conversion on a sandbox copy to measure real downtime | | Quality rehearsal | 2–4 weeks | Second conversion; business teams test and sign off | | Go-live weekend | 1 weekend | One-step conversion using SAP SUM 2.0 DMO | | Hypercare | 4 weeks | Old system kept as safety net, then retired |
How we keep downtime to one weekend
In our real customer engagement, we migrated a 14-year-old ECC system with a 1.8 TB database to S/4HANA on AWS. Total downtime: 26 hours over one weekend, zero lost production days.
The method: two full dress rehearsals before go-live — first on sandbox, then on the quality system with the customer's own finance and warehouse teams signing off. By go-live day, the migration had been executed and validated twice.
Total downtime: 26 hours on a weekend. Zero lost production days.
Your next step
Start with a free technical assessment — database size, custom code, interfaces, integrations. You get a readiness report and a roadmap, no cost and no obligation.
📘 Read the full case study: From Legacy to Cloud — SAP ECC to S/4HANA Migration
Need help? WhatsApp us at +91 93197 07938 or email contact@krizia.in.
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