The SAP S/4HANA migration is not one decision. Brownfield, greenfield, selective data transition, RISE private edition, and on premise are five separate commercial outcomes with five different license conversion lines. This article is the 2026 buyer side reference.
SAP S/4HANA carries five migration paths. Brownfield, greenfield, selective data transition, RISE private edition, and on premise. Each path has a different license conversion line, a different cost trajectory, and a different commercial leverage profile.
The buyer side discipline is to cost all five paths before opening the SAP conversation, then pick the path on TCO grounds, not on SAP narrative grounds. Most enterprises leave fifteen to twenty eight percent on the table at conversion by anchoring on the SAP recommended path.
Pair this article with the SAP knowledge hub, the SAP advisory practice, the S/4HANA advisory, the ECC to S/4HANA play book, the RISE negotiation framework, and the RISE rejection case study before the next decision point.
SAP supports five formal S/4HANA migration paths in 2026. Each path has its own technical sequence and its own commercial structure. The buyer needs the path matrix in hand before SAP opens the conversation.
| Path | Cost band | Risk profile | Leverage profile |
|---|---|---|---|
| Brownfield | Medium | Lower technical risk | Medium to high |
| Greenfield | High | Higher technical risk | High |
| Selective data transition | Medium to high | Module dependent risk | High |
| RISE private edition | Variable subscription | Operational simplicity | Low |
| S/4HANA on premise | Medium to high | Self managed | High |
SAP supports three license conversion models for ECC to S/4HANA transitions. Each model carries a different credit calculation and a different commercial impact on the buyer.
SAP applies the conversion credit at the moment of contract execution, not at the moment of go live. Customers that sign the conversion before the migration is complete carry the new support base on the new licenses, often before the new licenses are deployed.
The buyer side discipline is to negotiate a phased license activation aligned to the migration milestones, not the contract signature. The negotiation move is to push the conversion event to the go live date.
The cost of an S/4HANA conversion runs across three lines. The license conversion line, the implementation services line, and the running support line. Each path has a distinct profile across the three lines.
| Path | License line | Services line | Year one support | Five year TCO |
|---|---|---|---|---|
| Brownfield, mid size | $4.2M | $8.5M | $924K | $22.1M |
| Greenfield, mid size | $6.8M | $18.3M | $1.50M | $36.8M |
| Selective, mid size | $5.1M | $12.7M | $1.12M | $28.4M |
| RISE Premium Plus, mid size | n/a | $6.2M | $5.4M / yr | $33.2M |
| S/4HANA on premise, mid size | $5.4M | $11.2M | $1.19M | $25.6M |
Discount bands follow the path. Brownfield and on premise paths land at thirty five to fifty five percent off list on the license line. Greenfield carries a lower discount, twenty five to forty percent off list, because SAP positions greenfield as net new business. RISE subscription discount lands at fifteen to twenty five percent off the list rate.
The right path depends on five factors. The current ECC customization state, the business process maturity, the cloud strategy, the operational appetite, and the commercial leverage position.
The buyer side negotiation play book for S/4HANA conversions follows six moves. Each move targets a specific commercial lever inside the SAP conversion contract.
The S/4HANA brownfield scenario landed at fifteen percent below SAP's RISE opening across the five year window. The customer kept perpetual license rights, kept on premise control, and kept the option to revisit RISE at year four with the leverage intact.
The seven step checklist below is the buyer side starting position for any SAP S/4HANA migration engagement.
Not always. Brownfield is the lowest implementation cost path because it preserves customizations and master data, but the license conversion line still applies and the project carries six to twelve months of services. The buyer side discipline is to cost all five paths on a five year TCO basis before defaulting to brownfield.
SAP opening offers on S/4HANA brownfield conversions run at twenty to thirty percent off list. Closed deals land at thirty five to fifty five percent off list when the buyer brings credible alternative paths, particularly the on premise scenario and the RISE rejection scenario. The lever is the alternative path, not the brownfield conversation itself.
SAP supports a model that retires perpetual ECC licenses in favor of RISE subscription. The credit calculation is opaque and rarely matches the underlying license value. The buyer side discipline is to treat the substitution as a license retirement, and to model the long run cost of subscription against the avoided maintenance.
SAP applies expiry dates to specific conversion incentive programs, but the underlying contract conversion rights do not expire. The buyer side discipline is to separate the marketing incentive from the contractual right and to time the conversion event to the migration go live date rather than the incentive deadline.
Selective data transition is the path most often recommended for heavily customized estates because it lets the customer choose which modules to re implement. The path carries a higher project cost than brownfield but a lower cost than greenfield. The path preserves more buyer side leverage by allowing phased conversion.
Redress runs S/4HANA path selection and conversion negotiation engagements as a focused six to twelve week sprint, anchored on the buyer side TCO model. The work covers the path matrix, the conversion credit math, the support cap, the DAAP scope, the third party support scenario, and the negotiation sequence. Always buyer side, never SAP paid.
Redress runs S/4HANA migration engagements as part of the wider Vendor Shield subscription, the Renewal Program, the Benchmark Program, and the Software Spend Assessment.
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A buyer side reference on the S/4HANA path matrix, the conversion credit math, the support uplift cap, and the third party support lever. Built from hundreds of SAP migration engagements.
Independent. Buyer side. Written for CFOs, CIOs, and procurement leaders carrying SAP migration decisions. No SAP influence. No sales kickback.
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Open the Paper →The S/4HANA brownfield scenario landed at fifteen percent below SAP's RISE opening across the five year window. The customer kept perpetual license rights, kept on premise control, and kept the option to revisit RISE at year four with the leverage intact.
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