If you run SAP ECC, you already know the date: December 31, 2027. That's when SAP's mainstream maintenance ends.
You can pay extra for extended support until 2030. You can migrate to S/4HANA. Or you can do what many companies are quietly doing: nothing, and hope the problem gets bored and goes away.
It won't.
Everyone's moving. Most are moving badly.
Read the third number again. Half of companies are spending millions to pick up 20 years of workarounds and set them down in a shinier building.
That's not a migration. That's moving house without throwing anything out, including the broken treadmill in the garage.
Your real problem isn't SAP. It's the custom code inside it.
Over the years, every "small change" went into the core:
- A custom approval flow here
- A special pricing rule there
- A report the CFO's predecessor asked for in 2011
- Hundreds of custom programs (the famous "Z" code) that nobody fully understands and everybody is afraid to delete
Every one of those is now a migration cost. Each must be analyzed, rewritten, retested and re-explained. As an ISG analyst put it, "a lot of the delays are caused by people, not necessarily the technology."
And here's the kicker: once you've carefully moved all that custom code into S/4HANA, you've rebuilt the exact problem that makes every future upgrade painful.
SAP's own advice: keep the core clean
SAP has a name for the way out: a "clean core." Keep the ERP as standard as possible, and build what's unique to your business outside it, connected through official interfaces.
It's good advice. The problem has always been the "build it outside" part. That meant another big project, another integrator and another year.
That's the part that just got fast.
The smarter migration: strip it, then rebuild it beside the core
Instead of copying your custom code into the new system, use the deadline as your one big chance to clean house:
- Find the custom code that's really a business process. Approvals, pricing rules, portals, inspections, special workflows. These are the things that make your business different.
- Rebuild those as focused modules beside the ERP. Modern apps, designed for the people who use them, connected to S/4HANA through its standard interfaces.
- Migrate a clean, standard core. Less custom code to move means less to analyze, less to test, less to go wrong, and much cheaper upgrades for the next decade.
Why Defender makes this work
Rebuilding dozens of custom pieces sounds like a second megaproject. With Defender, it isn't:
| Moving custom code into S/4HANA | Rebuilding it beside the core with Defender | |
|---|---|---|
| Time per module | Months of analysis, rework and testing | Weeks, from requirements to release |
| Result | The same old logic in a new system | A modern app that fits how people work today |
| Future upgrades | Every custom change must be re-checked | The core stays clean, so upgrades stay simple |
| Documentation | Usually whatever's left from 2011 | Requirements, architecture and tests for every module |
| Ownership | Locked inside the ERP | You own all source code and IP |
Every module is built the way your auditors and IT team expect: signed-off requirements, an architecture plan, clickable screens approved by your users, automated tests, roles and permissions, a full audit trail, and deployment to your own cloud or servers.
The deadline is a gift. Use it.
You're going to spend serious money on SAP in the next three years whatever you do. The only question is whether you spend it copying the past or building the future.
Start with one piece. Pick the custom process in your SAP system that everyone complains about. We'll write a complete requirements document for its replacement, free, and show you how fast it can run beside a clean core.
December 31, 2027 isn't getting any further away.
