Why Your SAP S/4HANA Migration Is the Right Time to Fix Freight Audit

Key Takeaways

An SAP S/4HANA migration re-validates or rebuilds every interface touching the ERP, freight audit included, so the integration work is already funded and staffed.
That makes it a natural moment to ask whether your freight audit setup still fits the network you run today, rather than carrying it over as-is.
File-based integration over AS2 or SFTP is usually the lowest-risk path during cutover, with API connections available for teams feeding a data lake or warehouse.
The best window closes when a program moves from Explore into Realize in SAP Activate, after which freight audit changes become a separate project.
Standard ECC support ends in 2027 for recent versions, with paid extended maintenance to 2030 and a RISE transition option to 2033 for large customers.

During an SAP S/4HANA migration, freight audit integrations get re-validated or rebuilt along with every other interface that touches the ERP. In most migration plans we see, freight audit is listed as an interface to carry over as-is, with little attention to whether the underlying process still works. That reflects a wider pattern, and research from ISG found that nearly half of companies moving to S/4HANA do little or no process re-engineering, preserving legacy processes and data instead. A migration is the one moment when the integration work around your ERP is already funded, staffed and scheduled, which makes it the most practical time to fix a freight audit process your network has outgrown.

Why Complex Freight Networks Carry More Risk Into the Migration

Freight audit grows harder as a network spreads across entities, modes and regions, since every addition brings more carriers, contracts and billing rules to check. Companies that have grown through acquisition often run several ERP instances, each with its own carrier records, cost center structure and invoice formats, which can leave finance without a single view of freight spend or accruals and make executive decisions harder to defend. Temperature-controlled and other specialized equipment generates accessorial charges that are often difficult to validate against contract, and production disruptions can bring expedited moves billed outside negotiated rate agreements. Country tax rules, company codes and allocation logic then multiply the points where freight data has to be accurate, traceable and auditable.

An S/4HANA migration brings all of that complexity to the surface at once, because every connection has to be mapped to the new system. A global technology manufacturer shows what addressing it looks like. The company started with freight data fragmented across spreadsheets and no common standard across regions, and it now runs more than $2 billion in annual freight spend through one governed process, with data normalized across 147 countries and 24 currencies.

What Changes for Freight Audit When You Move From ECC to S/4HANA?

The interfaces between your ERP and your freight audit provider must be re-validated or rebuilt and one transport function changes materially, while carrier invoice and status EDI, which flows to the provider and never touches the ERP, typically stays as it is.

A brownfield system conversion calls for regression testing of existing interfaces, while a greenfield implementation means rebuilding them, so your migration approach shapes how much work freight audit adds. For most freight audit programs, the interface inventory covers five areas.

Master data, including carrier and vendor records, which become Business Partner records in S/4HANA, along with locations, cost centers and GL accounts
Inbound shipment, purchase order and freight cost data that invoices are audited against
Invoice posting and AP confirmation files returning to the ERP
Payment and accrual files that finance relies on at close
The outbound feed to your data warehouse or BI environment
In-region support. Local account teams and subject matter experts in every region, backed by a global network we call One Trax.
Neutrality. Trax is a carrier-agnostic third party, so the audit does not depend on the parties whose invoices it checks.
Integration experience. Trax supports flat file, API and EDI integration with SAP, Oracle and other major ERPs and has completed more than 500 data integrations, so freight audit data can arrive normalized and ready for finance and logistics reporting on the new ERP.
Discover. The business builds its case for the migration and defines scope at a high level, so freight audit can be named as an in-scope interface from the outset.
Prepare. The team finalizes the project plan and sets up the environment, which is still an easy point to add freight audit to the interface inventory.
Explore. Fit-to-standard workshops confirm the solution design, and freight audit changes can still fit within the scope the business has already approved.
Realize. The team configures, builds and tests the solution. By now the systems connected to the new environment are largely settled, so freight audit changes turn into a second project with its own budget request.
Deploy. The program cuts over to the new system and moves into production, so freight audit changes wait until after go-live.
Run. The business operates, supports and optimizes the new system, and a freight audit reset becomes a separate initiative competing for its own resources.

The material change sits on the transport execution side. SAP has positioned S/4HANA Transportation Management as the successor to LE-TRA, the transportation module built into ECC. LE-TRA’s usage rights under S/4HANA expire on December 31, 2030, and moving between the two requires redesigning transport processes and data because there is no direct conversion path. That decision belongs to your transport team. Freight audit in a multi-mode, multi-region network has to reconcile carriers and systems well beyond any single TMS, so it is worth planning on its own terms.

Does Your Freight Audit Setup Still Fit the Network You Run?

Whether you keep your current provider, re-validate it or look at alternatives, a migration is a good reason to check. Networks change faster than integrations do. Plants, carriers and entities get added, and the process built around them often stays as it was. Teams that look at their own invoice and rate data before the interface inventory locks often find the picture differs by region, mode and carrier, and that is far easier to act on while the program is still in Explore.

How Much IT Time Does a Freight Audit Reset Take?

S/4HANA programs put heavy demands on internal teams, and ISG found that nearly 60 percent of SAP migration projects run late and over budget, so program offices are right to guard scope. The case for including freight audit rests on the fact that its interfaces are already on the list. Those files exist today and must be re-validated regardless, so adjusting what flows through them adds less than opening a separate project after go-live.

File-based integration over standard protocols such as AS2 or SFTP is usually the lowest-risk path during a cutover, since it keeps freight audit loosely coupled to the new ERP while the core system stabilizes. In our experience it has typically required around 30 percent of one IT resource’s time during the build phase. Teams that want freight data flowing into their own data lake or warehouse can add an API connection as well.

Where Trax Fits

Trax is a global leader in freight audit and Transportation Spend Management, working with 300+ customers across 120+ countries on a cloud-based platform that audits 100% of invoices. In a migration, three things tend to matter most.

Where Are You in SAP Activate?

SAP Activate, SAP’s implementation framework for S/4HANA, names every stage of a migration, and the stage your program has reached determines how much effort a freight audit reset requires. The dividing line is the move from Explore into Realize, when the interface inventory effectively locks.

Companies still planning their migration, including those running ECC on extended maintenance, have the most room to fold freight audit in from the start.

What This Looks Like in Practice

Multi-entity pharma. A global pharma customer has tracked cost to serve across more than 10,000 SKUs and 19 currencies with Trax, through 15 ERP interfaces and more than a dozen acquisitions and divestitures. That view supported a decision to build a West Coast distribution center rather than flying product to a central hub and trucking it, which has saved an estimated $105 million over 18 years.

A setting nobody had questioned. One CFO told his team they were flying blind on accruals. Once the freight data was trustworthy, they found a single SAP default set to overnight parcel. That one finding was worth about $20 million in the first year.

Common Questions About Freight Audit and S/4HANA

Does Everything Break When You Move to S/4HANA?

No. Integrations are re-validated or rebuilt depending on your migration approach, and the one material freight-side change is the move from LE-TRA to SAP Transportation Management.

Does Freight Audit Need a Dedicated IT Team During the Migration?

No. Because the freight audit interfaces are already part of the re-validation scope, the work typically fits within the existing program as a fractional effort.

Should We Change Freight Audit Providers During the Migration?

Not necessarily. Many programs keep their provider and re-validate the integration. A migration is simply a good moment to check whether the setup still fits the network, and the quickest way to know is to look at your own data.

Is 2027 a Hard Deadline for SAP ECC?

It is one date among several. Standard SAP support for recent versions of ECC ends December 31, 2027, while older versions lost it at the end of 2025. Companies on the recent versions can pay a 2 percent premium to extend support through 2030, and SAP offers a further transition option to the end of 2033 for large customers that move to RISE with SAP.

Put Freight Audit on Your Interface Inventory

An S/4HANA migration already requires your team to inventory, test and sign off on every interface touching the ERP. Adding freight audit to that work while the program is still in Explore is a smaller ask than revisiting it after go-live, and it gives finance and logistics cleaner freight data from day one. Download the Freight Audit Integration Readiness Checklist to see which interfaces to check before your inventory locks, or contact the Trax team to talk through how your freight audit integrations fit your migration plan.