The SAP Integration Challenges Most Acquisition Plans Miss

Most acquisition plans assume that business systems will eventually be consolidated. Organizations connect systems through integrations and continue operating multiple platforms for years after a deal closes.

While this enables business continuity, it also introduces long-term complexity that is often underestimated during integration planning.

The Integration Layer Often Becomes Permanent

When two companies merge, the priority is usually to keep business operations running while integrating financial, operational, and reporting processes. In many cases, the acquired systems remain in place and are connected to the existing landscape through new integrations and data interfaces.

These integrations often become part of the long-term operating environment. As systems evolve, changes to data structures, application upgrades, and process modifications can affect how information moves between platforms. Without ongoing monitoring and ownership, issues such as failed data transfers, incomplete transactions, or outdated records can create operational challenges.

The complexity increases with each acquisition. Organizations may find themselves supporting multiple ERP instances, overlapping master data, and integrations managed by different teams across different business units. And with time, maintaining consistency, governance, and visibility across the combined landscape becomes progressively more difficult.

A single acquisition may introduce a manageable number of integrations and data dependencies. After multiple acquisitions, however, organizations often find themselves supporting a growing network of interconnected systems, different SAP versions, overlapping master data, and integrations owned by multiple teams. Maintaining visibility and governance across that environment becomes increasingly difficult.

Where Operational Costs Begin to Accumulate

The costs associated with acquisitions often emerge after the integration programme is complete. While the initial project receives funding, executive oversight, and dedicated resources, the operational complexity of the integration persists long after go-live.

Let's look at some common examples:

Duplicate master data

The same supplier may exist under multiple vendor records across different company codes, each with different payment terms, tax information, or procurement rules. As a result, analytics, sourcing, and reporting initiatives often require significant data-cleansing effort before meaningful insights can be generated.

Longer financial close cycles

Acquisitions frequently introduce additional reconciliation steps, duplicate processes, and data validation requirements. Individually, these delays may appear minor, but over time they can add days to the month-end close process and increase the workload on finance teams.

Growth in reconciliation effort

Many organizations implement manual checks and reconciliation processes during integration projects to address short-term gaps between systems. These temporary measures often become permanent operating processes, requiring ongoing support from finance and operations teams.

Poorly documented integrations

Over time, ownership of integrations can become unclear. The original implementation team may not be on board, supporting documentation may be outdated, and knowledge of how specific interfaces work may reside with only some individuals. This increases operational risk and makes troubleshooting or enhancement efforts difficult.

These costs rarely appear as a single budget item. Instead, they surface through longer close cycles, additional support resources, reconciliation effort, and ongoing integration maintenance. Over time, they can significantly reduce the operational efficiencies the acquisition was expected to deliver.

The separation case is the same problem inverted

Spins, divestitures, and carve-outs are treated as simpler because something is leaving rather than arriving. In practice, they introduce a different set of challenges. A carve-out means untangling shared master data, shared company codes, and shared interfaces that were designed on the assumption they would never need to come apart, usually under a transition services agreement with a strict expiry date and a penalty attached.

Separating shared systems, data structures, and integrations is as complex as combining them. Even after a carve-out is complete, both organizations typically need to manage the operational impacts of decisions made during the separation process.

How the SAP 2027 Deadline Changes the Timing

SAP ECC mainstream maintenance ends on 31 December 2027, and a Fortune-500-scale S/4HANA migration takes 18 to 36 months. organizations still running SAP ECC, new integration investments should be evaluated alongside their S/4HANA roadmap. Building integrations today without considering future migration requirements can increase cost and complexity later.

Which is not an argument for stopping. It is an argument for deciding the build and the run model together rather than in sequence . It’s because the integration you commission this quarter must be handed to somebody, and the deadline decides how long that somebody must live with it.

Where does Rialtes fits

Rialtes helps organizations manage SAP landscapes through periods of growth, transformation, and operational change.

Our capabilities include:

• SAP application managed services — 24x7 global coverage, incident and enhancement delivery, governance
• SAP CPI and integration-estate consolidation, including PI/PO migration
• MuleSoft integration architecture across SAP, Salesforce, and surrounding systems
• SAP S/4HANA migration and optimization, with the run model designed alongside the build

Rialtes helps organizations modernize SAP environments while maintaining long-term operational stability