SAP Migration · 6 min read · July 2025
The 2027 SAP ECC deadline, and how much time you really have
By Thinklytics Partners, SAP S/4HANA Practice
SAP ECC mainstream maintenance ends December 2027. Support does not vanish that day, but the practical message is the same: start now.
Topics covered
- SAP ECC
- 2027 Deadline
- S/4HANA
- Migration Planning
Frequently asked questions
When does SAP ECC support end?
Mainstream maintenance for ECC 6 ends December 31, 2027. Optional extended maintenance runs to 2030 at roughly two extra percentage points of fee.
Does support disappear in December 2027?
No. Mainstream maintenance ends, but paid extended maintenance is available to 2030, and a restricted private-cloud option exists for some large customers beyond that. The cost and risk rise as the window closes.
How long does a migration take?
Typically 6 to 18 months for the mid-market and 18 to 36 months for large enterprises, depending on data volume, customization, and how clean the data is.
Why start now if the deadline is 2027?
Because capacity is tightening. Senior specialists are scarce, rates are rising 30 to 50 percent through 2026 and 2027, and most of the installed base is migrating at once. Starting early lets you choose your path and partner.
What is the first step?
A readiness assessment that measures the true condition of your data and custom code before you commit to a date and budget. It is the cheapest way to de-risk a large program.
Has SAP extended the deadline?
No general extension. The 2027 mainstream end stands, with paid extended maintenance to 2030 as the main relief valve.