White paper xii · SAP

The S/4HANA conversion at the 2027 horizon.

Conversion credit treatment, named-user reclassification under the new metric scheme, custom-code remediation cost, Digital Access reconciliation, brownfield versus greenfield posture, and the route to a defensible S/4HANA position before the 2027 maintenance horizon. Written from the buyer’s side. None of it carries reseller margin or referral fee.

FormatWhite paper, gated
Pages26
AudienceCIO, CFO, SAP CoE, Sourcing
PublishedJune 2025
UpdatedFebruary 2026

A senior Admodum advisor will follow up to confirm receipt and offer a private read of the document if you would prefer a guided walkthrough. There is no obligation. The paper is the deliverable.

Contents

Inside the 26 pages.

i.
Why the conversion matters
The 2027 mainstream maintenance horizon, the extended maintenance window, the SAP commercial logic and the buyer’s decision tree.
ii.
Conversion credit treatment
The legacy ECC entitlement, conversion credit ratios, product-mapping arithmetic and the under-stated credit positions Admodum recovers.
iii.
Named-user reclassification
The Functional User, Productivity User, Developer User and Self-Service User scheme, mass reclassification, and the indirect-access perimeter.
iv.
Digital Access reconciliation
Document-based pricing, the nine document types, the historical-baseline reading and the Digital Access estate the buyer should defend at conversion.
v.
Custom-code remediation
The ABAP code base assessment, S/4HANA simplification list, the SAP Readiness Check evidence and the remediation cost the buyer must absorb.
vi.
Brownfield versus greenfield
The system conversion path, the new implementation path, the hybrid posture and the criteria Admodum uses to recommend each posture.
vii.
RISE and Private Edition options
RISE with SAP Premium / Premium Plus, Private Cloud Edition, the BTPEA bundle and the commercial reading of each subscription posture.
viii.
The 2027 commercial window
The mainstream maintenance end-date, the extended maintenance fee, the cost framing across paths and the negotiation posture inside the window.
ix.
Reading list and references
Companion papers on SAP RISE economics, Digital Access indirect-use, SAP audit defence and the BTPEA bundle.
Excerpt · Section II

The conversion credit is not a discount. It is a property right.

SAP frames the conversion credit as a commercial gesture, a discount the publisher extends to the existing ECC customer to ease the transition to S/4HANA. The framing is misleading. The conversion credit is the financial expression of the perpetual licence rights the buyer already owns. The buyer is not being granted a discount; the buyer is being asked to convert one entitlement into another with the credit netting the difference.

The conversion credit is the financial expression of the perpetual licence rights the buyer already owns. It is not a discount.

The under-stated credit position is the most common SAP conversion failure mode Admodum sees. The under-statement typically arises because the legacy ECC entitlement record is incomplete, the conversion credit ratios are applied to a base less than the full entitlement, or the SAP commercial team has used a conservative reading of the mapping schedule. The Admodum protocol re-runs the credit calculation from the original ECC contract base, applies the full mapping schedule and surfaces the gap before the conversion contract is drafted.

This paper covers the conversion methodology Admodum applies across the eighteen-month preparation cycle: the credit reconciliation, the named-user reclassification, the Digital Access defence, the custom-code remediation framing, the brownfield versus greenfield decision and the 2027 commercial window.

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Independence
Admodum is not a partner, reseller, or affiliate of SAP, or of any other software vendor. No reseller margin, no referral commission, no SAP audit subcontract.
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