RISE versus build your own private cloud TCO.

A small but growing number of enterprises evaluating RISE with SAP are looking past the obvious comparison with brownfield and asking a different question: what would it cost to build and operate S/4HANA on hyperscaler infrastructure independently, without SAP as the managed service provider. The build your own private cloud option, sometimes called BYOC or self managed cloud, is a genuine third path. It is not the right answer for most buyers, but for organisations with mature cloud operations, deep SAP basis expertise, and a strong preference for control over service packaging, the path can produce TCO outcomes that compete with or beat RISE. The comparison requires honest accounting of the operational overhead that RISE absorbs and BYOC does not, and a clear view of where the breakeven sits on scale.

01.What the BYOC option actually involves

Build your own private cloud means the enterprise procures hyperscaler infrastructure directly, deploys S/4HANA Cloud Private Edition on that infrastructure under a separate licence agreement with SAP, and operates the resulting estate using its own teams and tooling. The SAP licence covers the software. The hyperscaler contract covers the infrastructure. The internal team covers the operations.

The model is structurally similar to the on premise model except that the infrastructure is rented from a hyperscaler rather than owned by the enterprise. The operating discipline is the same. The skills required are largely the same. The economics are different because the hyperscaler removes the hardware refresh cycle and converts capital expenditure into operating expense.

BYOC is not a SAP product. SAP supports the configuration but does not actively promote it because it competes with RISE. The path is enabled by the fact that S/4HANA Cloud Private Edition can be deployed and operated on any major hyperscaler, and by the fact that the SAP licence cost for Private Edition outside the RISE bundle is similar to the cost inside the bundle.

The buyer who pursues BYOC is making a commercial choice to retain control over the operational layer that RISE packages. The choice has costs and benefits, and the seven year TCO comparison surfaces both.

02.Where BYOC costs more than RISE

BYOC costs more than RISE on operational headcount. The team required to run S/4HANA on hyperscaler infrastructure is larger than the team required to consume RISE. The functional team is similar in size in both cases. The infrastructure team, the basis team, and the cloud operations team are larger under BYOC because the work that RISE absorbs has to be done internally.

The headcount differential depends on the size of the estate and the maturity of the operations function. For a mid sized SAP estate, the differential is typically three to six full time equivalents. For a large estate, it can be ten to fifteen. The cost of those FTEs needs to be loaded into the BYOC case fully, including not just salary but benefits, training, tooling, and management overhead.

BYOC also costs more on third party tooling. RISE includes a baseline set of monitoring, observability, and operations tooling. BYOC requires the enterprise to procure and maintain the equivalent tooling separately, which can run between two and five percent of the infrastructure spend annually.

BYOC also carries more contractual complexity. The enterprise manages two contracts, one with SAP and one with the hyperscaler, rather than one bundled contract. The procurement overhead is real, and it shows up in the legal and procurement budget as additional review time and additional vendor management overhead.

03.Where BYOC costs less than RISE

BYOC costs less than RISE on infrastructure margin. The hyperscaler price the enterprise pays directly is typically ten to twenty percent below the price RISE includes for the same capacity, because RISE adds a margin to cover the operational service. The differential applies across compute, storage, and network.

BYOC also costs less on commitment flexibility. RISE typically requires a seven year capacity commitment at a specific volume. The hyperscaler contract can be structured with three year reserved instances for the predictable workloads, savings plans for the variable workloads, and on demand for the burst. The mixed commitment model produces a blended rate that is often five to ten percent below the equivalent RISE rate.

BYOC also costs less on consumption upside. If consumption grows faster than the original commitment, RISE typically applies overage rates that are at a premium to the committed rate. The hyperscaler equivalent is on demand pricing, which is at a smaller premium and can be folded into a savings plan adjustment with less commercial friction.

The infrastructure savings, the commitment flexibility, and the consumption upside together produce a BYOC infrastructure cost that is typically fifteen to twenty five percent below the equivalent RISE infrastructure cost. The savings need to be set against the higher operational headcount cost to produce the net TCO comparison.

04.The breakeven point on scale

The net comparison depends on scale. At small scale, the additional operational headcount in BYOC outweighs the infrastructure savings, and RISE wins on TCO. At large scale, the infrastructure savings outweigh the headcount, and BYOC wins. The breakeven point sits somewhere between, and the exact location depends on the operational maturity of the enterprise.

For enterprises with mature cloud operations and existing SAP basis teams, the breakeven point typically sits at around two to three thousand FUE. Below that scale, RISE produces a lower TCO. Above that scale, BYOC produces a lower TCO, sometimes by a meaningful margin.

For enterprises with less mature operations, the breakeven point is higher, sometimes five to eight thousand FUE. The higher breakeven reflects the cost of building the operations function from scratch, which is often comparable to the savings BYOC produces.

The breakeven point also depends on the operational region. In markets where skilled SAP basis talent is expensive or scarce, the BYOC headcount cost is higher, which pushes the breakeven up. In markets where talent is more available, the breakeven is lower.

05.Non TCO factors that matter

Even when BYOC produces a lower TCO, it is not always the right answer. The non TCO factors that matter include control, agility, risk concentration, and strategic alignment with the broader IT operating model.

Control is the strongest argument for BYOC. The enterprise retains direct control over the infrastructure configuration, the patching schedule, the upgrade cadence, and the integration with the broader estate. Enterprises with strong views on any of those dimensions sometimes choose BYOC even when the TCO is similar to RISE.

Agility cuts both ways. RISE delivers a more predictable cadence with less optionality. BYOC delivers more optionality with more responsibility for execution. The right answer depends on whether the enterprise values predictability or flexibility more highly in the SAP estate.

Risk concentration is the strongest argument for RISE. With RISE, SAP is responsible for the end to end service and the buyer has a single throat to choke if something goes wrong. With BYOC, the responsibility is split across multiple parties, which can produce finger pointing when an issue arises. The risk concentration question is often the deciding factor at the board level, even when the TCO favours BYOC.

06.When to actively evaluate BYOC

The BYOC option is worth evaluating in three scenarios. The first is when the SAP estate is large enough that the breakeven on TCO clearly favours BYOC. The second is when the enterprise has a strong cloud operations function and is uncomfortable with the loss of operational control that RISE represents. The third is when the SAP estate is part of a broader cloud strategy that already manages other workloads on hyperscaler infrastructure with internal teams.

Outside those three scenarios, BYOC is typically not the right answer. The operational overhead is too high relative to the infrastructure savings, the contractual complexity adds friction without compensating benefit, and the risk concentration argument tilts the decision back toward RISE.

Even when BYOC is not the chosen path, evaluating it produces leverage in the RISE negotiation. SAP is aware that BYOC is a credible alternative for larger and more sophisticated buyers. A buyer who can credibly walk away from RISE toward BYOC produces meaningful commercial concessions from the SAP side, often in the range of five to twelve percent additional discount on the RISE proposal.

The evaluation does not have to be a commitment. It can be an exercise. The exercise produces a number that informs the RISE conversation, even if the final decision lands on RISE. The cost of producing the evaluation is small relative to the size of the RISE contract, and the upside in negotiation is meaningful.

BYOC is not the right answer for most buyers. Evaluating it is the right answer for almost all buyers, because the evaluation produces leverage in the RISE conversation that the buyer cannot generate any other way.

07.Conclusion

Build your own private cloud is the third path between brownfield and RISE. It is not the right path for every enterprise, and the seven year TCO comparison reveals exactly where the breakeven sits between the two options. The evaluation is worth doing for any enterprise of meaningful scale, both because it produces a defensible recommendation on the right operating model and because it produces leverage in the RISE negotiation that would not otherwise exist. The work is technical, multi disciplinary, and rarely conclusive on the first pass. The buyer team that runs the analysis with the same rigour as the brownfield comparison ends up with a stronger view of what the SAP estate actually requires, and a stronger position from which to negotiate whichever path is ultimately chosen.