Reducing SAP Licensing Costs During S/4HANA Migration

A study cited by Liberty Advisor Group found that 32% of companies migrating to SAP S/4HANA underestimated the total cost. Migration costs extend beyond software licensing: consulting, infrastructure, customizations, data conversion, and training can all affect the budget. Reducing SAP licensing costs during S/4HANA migration starts with comparing current and future usage requirements, then aligning license assignments with actual needs.

It’s easy to focus on the new system’s licensing model and overlook costs carried over from the existing environment. Unused roles, authorization objects, legacy data, and systems kept live after go-live can add expense or complexity. Migration is also an opportunity to review what the business needs to retain, rebuild, or retire.

This article explains key cost drivers, how license analysis can uncover optimization opportunities, and how to weigh recurring savings against migration investment. It also shows why payback estimates depend on when benefits are realized and on the new environment’s ongoing costs, helping you build a more complete business case.

What Drives SAP S/4HANA Migration Costs?

SAP S/4HANA migration is a comprehensive ERP transformation, not a simple upgrade. Costs depend on the system’s complexity, migration approach, data volume, infrastructure, and the work needed to adapt existing processes.

To understand how licensing models and migration choices interact, watch this overview:

Budget Overruns and Total Cost of Ownership

Total cost of ownership is the full cost of implementing, operating, and maintaining S/4HANA, not just the initial migration spend. A study cited by Liberty Advisor Group found that 32% of companies migrating to SAP S/4HANA underestimated the total cost. This matters because consulting, infrastructure, customization, training, and ongoing support can extend beyond the project budget, while legacy systems may continue generating expenses after go-live.

Migration Assessment and Budgeting

A migration assessment reviews the existing SAP environment, business requirements, data, custom code, and integration dependencies to develop a realistic estimate. Its findings help teams separate essential work from avoidable complexity before committing funds. A brownfield conversion can preserve existing complexity if the source system is not reviewed first. A greenfield implementation rebuilds the system, while a selective data transition retains chosen data and history.

ERP Migration IT Budgeting

ERP migration budgeting allocates funding for both the technical transition and the business work needed to keep operations running. Include infrastructure upgrades, external consultants or systems integrators, customization redevelopment, data conversion, testing, training, and support. For organizations upgrading wider IT and enterprise systems during major transformations, technology service providers like itsthe1.com offer relevant infrastructure and support solutions. Separating one-time project costs from recurring operating costs clarifies the financial impact and avoids treating go-live as the end of expenditure.

Build the estimate around the chosen migration route and its technical prerequisites. SAP Cloud ERP requires a new implementation; SAP Cloud ERP Private and SAP S/4HANA on-premises also support system conversion and selective data transition, subject to technical prerequisites. Compare integration needs across connected applications, since incompatible customizations may require redevelopment or risk losing important functionality.

Data scope also shapes the budget. Decide what should move to S/4HANA, be archived, be deleted, or remain accessible outside the operational system. Archiving unnecessary information before migration can reduce the volume that must be converted, tested, and transferred. Each gigabyte of SAP S/4HANA data affects memory and infrastructure costs, so data decisions can influence both project effort and ongoing ownership.

Turn assessment findings into a budget that connects technical work to business impact. For example, map each major customization to its purpose, compatibility, and integration dependencies, then estimate whether it needs redesign or replacement. Include cutover planning and post-migration training alongside implementation tasks. This makes the estimate more complete and helps expose cost drivers before they become budget overruns. SAP data migration planning can also support decisions about data scope and transition requirements.

Organizations migrating to SAP S/4HANA may underestimate total cost of ownership, potentially resulting in budget overruns and financial strain. External consultants or systems integrators may be required, with costs potentially higher for large-scale or complex migrations. These factors make it important to account for professional support and ownership costs when setting a migration budget, rather than treating the initial project estimate as the full financial commitment.

License analysis and optimization during migration

Compare current entitlements with planned S/4HANA usage before finalizing migration assumptions. A focused review of authorizations, contracts, and integrations can reveal mismatches early.

License Measurement Across ECC and S/4HANA

ECC and S/4HANA licensing can measure usage differently, so current license counts don’t automatically predict future needs. S/4HANA licenses are stated to be 35% more expensive on average because licensing is based on assigned authorizations rather than actual usage. Compare authorization assignments with observed use to identify gaps and unused roles. This matters because reducing SAP licensing costs during S/4HANA migration starts with aligning access to genuine business requirements.

Deployment Models and Licensing Costs

The deployment model affects how licensing and infrastructure expenses are packaged across RISE with SAP, cloud, private cloud, and on-premises environments. RISE commonly uses subscription-based licensing, unlike traditional perpetual licenses. In the United States, compare contract scope, included services, infrastructure responsibilities, and ongoing fees. Total cost depends on these terms, not the deployment label alone.

SAP Cloud ERP requires a new implementation; SAP Cloud ERP Private and SAP S/4HANA on-premises also support system conversion and selective data transition, subject to technical prerequisites. These implementation routes shape project scope, but don’t establish a universal licensing price comparison. Create a like-for-like view of license terms, infrastructure, and continuing obligations.

Contract Terms, Audits, and Maintenance Fees

Contract terms define permitted software use and how fees apply during migration. Review license metrics, user classifications, subscription periods, maintenance provisions, renewals, audit rights, and third-party access. These terms affect costs when existing entitlements do not align with planned roles or integrations. According to the Internal Revenue Service, contractors must maintain an accurate inventory of software licenses and subscriptions and continuously track license allocation and consumption.

Prepare for an audit by reconciling contract entitlements, user assignments, system access, and subscription records. Keep evidence of migration changes, including retired roles and updated integrations. Third-party access, custom code, and interfaces can affect compliance if they change how SAP systems are used. Compare each scenario with the applicable contract definitions before cutover.

Licensing Options and Pricing Models

S/4HANA options include subscription-based arrangements and traditional perpetual licensing, with RISE associated with a subscription model. Pricing may reflect the selected model, assigned authorizations, deployment scope, and contract terms. For indirect or digital access, fees follow applicable contract metrics and usage definitions; map external-system interactions to those terms rather than assuming every connection is treated alike.

For reducing SAP licensing costs during S/4HANA migration, map roles to business activity, identify unused authorization objects, and document third-party connections. This creates a clearer basis for comparing license allocation with future access needs. Discuss SAP licensing and migration planning when access design and contract interpretation need to be considered together.

Migration costs and recurring savings

A credible savings case separates one-time migration spending from recurring costs after go-live. SAP S/4HANA expenses can include licensing, infrastructure upgrades, consulting, customizations, training, and change management. Against these, assess savings that continue across operations, such as reduced infrastructure requirements or process improvements. PwC found that 65% of organizations expect recurring annual savings from SAP S/4HANA.

Build the comparison around a consistent baseline. Record current maintenance, infrastructure, support, and operating costs, then estimate the corresponding S/4HANA expenses. Keep transition costs separate from ongoing savings; otherwise, a project may appear financially attractive by combining unlike periods or excluding new recurring expenses.

This is an example, not a universal saving. The relevant calculation depends on the organization’s actual maintenance basis and the costs that change after migration.

Use the net figure, rather than gross benefits, when evaluating recurring savings.

Timing changes the first-year result. In the example, only 60% of infrastructure-related savings and process improvement benefits are realized in the first year after go-live. Benefits reach 100% from the second year after go-live. A phased transition, delayed process changes, or slower infrastructure retirement can therefore shift when projected savings appear.

Model cost categories separately to see what drives the outcome:

• One-time: consulting, customization, migration, testing, training, and change management.
• Recurring: S/4HANA licensing, infrastructure, support, and any legacy-system costs that remain.
• Benefits: infrastructure savings and process improvements, recorded by the period they begin.

Archiving data before conversion can reduce the volume that must be converted, tested, and transferred, potentially lowering migration effort. The business case should also include the infrastructure needed to operate the target landscape. Do not count a one-time reduction in project work as an annual operating saving.

Test the estimate against different benefit realization schedules. Compare the full-benefit case with a slower transition, and show both gross savings and net recurring benefit. This makes assumptions clear to finance and IT, helping decision-makers assess whether projected operational improvements justify the investment.

Migration investment and payback

A payback estimate compares the upfront S/4HANA investment with net benefits realized over time. It should include migration costs, recurring operating expenses, and the timing of savings. Cloud migrations can shift IT expenses from capital expenditure to operating expenditure, changing cash-flow patterns without automatically reducing total cost. The business case must reflect the selected deployment and the existing environment.

SAP S/4HANA’s in-memory database technology may require infrastructure investment, whether an organization moves to the cloud or upgrades on-premise systems. Include that investment alongside licensing, data transition, implementation, and any costs associated with keeping legacy systems live. If those systems remain after go-live, ongoing infrastructure, maintenance, security, compliance, and licensing expenses can delay the point when cumulative benefits exceed investment.

These figures are scenario assumptions, not a universal estimate. They show why a payback calculation needs both the implementation outlay and net annual benefit, rather than relying on projected gross savings alone.

The same example assumes benefits reach 100% from the second year after go-live. Under those cash-flow assumptions, the project’s payback period is approximately 4.98 years. A different realization schedule or recurring expense profile changes the result, even if the initial investment remains constant.

Make the calculation transparent by separating each component:

• Initial investment: implementation, migration, infrastructure, and other one-time project spending.
• Annual net benefit: recurring financial benefits after additional operating expenses.
• Timing: the portion of benefits expected in each year after go-live.
• Payback: when cumulative net cash flow offsets the initial investment.

Test the premise with a slower benefits case. If data conversion, integration, or process changes delay savings, record the lower cash flow in the affected period. Also model legacy costs for each period those systems remain active. Delaying an SAP S/4HANA migration can increase future costs and complexity, so compare the planned schedule with the financial effects of deferral.

Use the organization’s own baseline to replace illustrative assumptions. Separate capital and operating expenditure, identify which infrastructure costs change, and document when each benefit begins. In a DACH-region survey, 82% of organizations achieved a positive business case after introducing SAP S/4HANA. That result offers context, but a company’s payback still depends on its investment, ongoing costs, and realized benefits.

SAP S/4HANA migration costs

Build the migration estimate around the complete technical and operating landscape, not software licensing alone. SAP S/4HANA costs can include licensing, infrastructure upgrades, consulting, customization, training, and change management. The balance depends on system complexity, chosen deployment, data scope, and how much existing functionality must change. Separating these drivers helps finance teams see what creates project effort and what continues after go-live.

Maintenance timing adds another planning factor for organizations still running SAP ERP 6.0. Mainstream maintenance for SAP ERP 6.0 without an enhancement package and for EHP1-5 ended on December 31, 2025. Mainstream maintenance for SAP ERP 6.0 EHP6-8 continues until December 31, 2027. Include the current support position in migration planning, alongside the cost and risk of operating legacy systems.

Legacy environments can continue generating licensing, infrastructure, maintenance, security, and compliance costs after S/4HANA goes live. A dual-system period may be necessary for transition activities, but leaving the old system running indefinitely can extend those expenses. Define which business processes still depend on the legacy environment, then connect each dependency to a retirement condition and a cost owner.

Data volume affects both conversion effort and target infrastructure. SAP S/4HANA memory and infrastructure costs are affected by each gigabyte of data, so retaining all historical records in the operational system can have lasting implications. Classify data for migration, archiving, deletion, or external access. Archiving unnecessary data before conversion can reduce the volume that must be converted, tested, and transferred.

Custom code creates a separate technical cost driver. Existing customizations may be incompatible with S/4HANA, requiring redevelopment or risking loss of critical functionality. Assess each customization for business purpose, technical compatibility, and integration dependencies. For example, a heavily modified process used by several connected applications may require coordinated redesign, not just a code adjustment.

Budgeting should distinguish one-time transition work from recurring obligations. Track project implementation and conversion expenses separately from licensing, infrastructure, maintenance, and support after go-live. This makes costs that continue while legacy and new environments coexist easier to see. It also prevents a migration estimate from treating a temporary reduction in project effort as a lasting operating saving.

For a practical cost review, connect technical findings to clear owners and decisions:

• Licensing: align future access needs with the selected S/4HANA model.
• Infrastructure: assess memory requirements and hosting responsibilities.
• Legacy systems: document dependencies, ongoing costs, and retirement criteria.
• Data and custom code: prioritize what moves and what needs remediation.

With 68% of ECC customers concerned about high S/4HANA migration costs, a transparent estimate matters. Plan an SAP migration cost review to connect licensing, data, and technical decisions with the broader transition budget.

Far from overlooking the licensing model, organizations must recognize that SAP S/4HANA commonly uses a subscription-based licensing model, which differs from traditional perpetual licenses, particularly for organizations adopting SAP RISE with Kagool guiding their journey. A larger SAP HANA database can push an organization toward a higher memory tier and increase long-term costs. Smaller, incremental migrations can help organizations stay current without overextending budgets or resources.

Kagool: SAP Consulting Services

Kagool helps organizations connect SAP migration decisions with licensing, technical requirements, and business priorities through SAP Consulting Services. Turn to this support when your team needs to assess current entitlements, compare them with planned S/4HANA usage, or align migration scope with a clear cost and payback model.

A focused assessment can bring license allocation, data transition, infrastructure choices, and legacy-system dependencies into one planning view. This helps teams identify decisions that affect migration effort and ongoing costs, then coordinate next steps across IT and finance. For organizations also evaluating their data platform, Kagool offers Microsoft Azure and Fabric Solutions and Databricks Data Platform Implementation.

Contact Kagool to discuss your SAP migration priorities.

Make Your S/4HANA Investment Work Harder

Reducing SAP licensing costs during an S/4HANA migration is not a one-time exercise. Treat license alignment as part of ongoing financial governance, with clear ownership for reviewing access, usage, and changing business needs after go-live. This helps keep technology decisions connected to how teams actually work, rather than letting old assumptions shape future spend.

Kagool’s SAP Consulting Services can help organizations coordinate licensing and migration priorities in a practical plan. Where the wider roadmap includes data and cloud modernization, Kagool also offers Microsoft Azure and Fabric Solutions and Databricks Data Platform Implementation. Connect these technology choices to your organization’s operational priorities and desired outcomes as the next step.

Discuss migration costs with Kagool and take the next step toward a more deliberate S/4HANA strategy.

Frequently Asked Questions

How do RISE with SAP and on-premises S/4HANA compare in total licensing cost?

RISE with SAP commonly uses subscription-based licensing, while on-premises S/4HANA may use traditional perpetual licensing. Compare contract scope, included services, infrastructure responsibilities, and ongoing fees for a like-for-like total cost view.

How does SAP determine indirect access and digital access licensing fees?

Indirect and digital access fees depend on the applicable contract metrics and usage definitions. Map external-system interactions to those terms rather than assuming every connection is treated alike.