SAP ECC to S/4HANA Migration | White Paper

The Short Version

If you read nothing else

Bottom Line

The 2027 ECC deadline is leverage, not pressure. Buyers who model conversion, RISE, and Greenfield against actual TCO save 25 to 40 percent on the migration commercial. The playbook is to inventory entitlements, model three paths, and force SAP to compete with itself.

Key Takeaways

Five conclusions

Three paths, not one. Conversion, RISE, and Greenfield all reach S/4HANA. Each has different commercial mechanics. Model all three.

Conversion credit is finite. SAP credits ECC entitlement toward S/4HANA, but the conversion ratio is negotiable. Push hard.

RISE is opaque. RISE bundles software, infrastructure, and services. The bundling masks the unit costs. Demand the breakdown.

Indirect access transfers. Digital Access exposure does not vanish in migration. Confirm coverage in the new contract.

The 2027 deadline is leverage. SAP wants the migration before 2027 more than you do. Use the timing in your favor.

Recommendations by Role

What to do this quarter

Chief Information Officer

Inventory every ECC license, module, and named user
Model conversion, RISE, and Greenfield TCO at 5 years
Refuse to commit before all three options are quoted in writing

Procurement

Demand the conversion credit ratio in writing
Demand the RISE unit cost breakdown
Refuse to bundle Digital Access into the migration without floor pricing

Architecture

Map every ECC module to its S/4HANA successor
Identify modules that will not transfer and budget accordingly
Document all third party integrations for Digital Access measurement

The Framework

Eight ideas

1. The 2027 Deadline

Mainstream maintenance for ECC ends December 2027. Extended ends 2030. SAP wants the migration done. The deadline is leverage if you start the conversation early.

2. Three Paths

Conversion (Brownfield) reuses configuration. RISE migrates to managed cloud. Greenfield rebuilds from scratch. Each has different cost, time, and risk profiles.

3. Conversion Credit Math

SAP credits ECC entitlement toward S/4HANA. The ratio is published but negotiable. Push for full credit on perpetual licenses, partial on subscription.

4. RISE Mechanics

RISE bundles software, infrastructure, services, and SLAs. The bundle masks unit costs. Demand the breakdown. Compare against ungated alternatives.

5. Indirect Access in Migration

Digital Access exposure transfers during migration. Confirm coverage in the new contract. Negotiate the indirect access rate at the contract, not at audit.

6. Greenfield Discipline

Greenfield is the cleanest reset but the most expensive. Most enterprises overestimate the cost reduction. Model carefully.

7. Ramp and Phasing

Migrations span years. Ramp the licensing to match the migration. Refuse cliff pricing. Phase the commit.

8. The Negotiation Moment

The migration commercial is the largest SAP transaction most CIOs will sign. Treat it as a board level negotiation. Force SAP to compete with itself across the three paths.

Reference

Acronyms

ECCERP Central Component

S/4S/4HANA

RISERISE with SAP

TCOTotal Cost of Ownership

DADigital Access

BPMBusiness Process Management

Methodology & Sources

This white paper draws on Redress Compliance engagements, public vendor documentation, and the active Redress benchmark program.

About the Author

Fredrik Filipsson

Co Founder, Redress Compliance

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SAP ECC to S/4HANA Migration: A Licensing and Negotiation Playbook

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