SAP is used in your company’s North American division; Oracle in Europe; and possibly NetSuite for the newly acquired subsidiary. You have different vendor masters, invoice processes, and controls across these systems. Somewhere between them, money can leak out.
Revenue leakage in multi-ERP accounts payable happens due to duplicate payments, incorrect prices, lack of credit detection, and mismatched contracts.
In this article, we explore how discrepancies in payments arise within complicated AP systems, why internal controls cannot detect them, and what finance leaders can do about them.
Revenue leakage in accounts payable is a loss of money that takes place through payment mistakes or financial opportunities overlooked. It could have been discovered prior to the money going out of the company. This value is lost through the normal process of financial activity.
Some examples include the double-payment of invoices, the non-discounted payments due to delays in approvals, the use of wrong prices in contracts, and failure to apply credits from vendors.
Such issues may be small in nature and repetitive. Based on the 2026 SSO Network analysis, a fraction of a percent of total spend may mean millions of dollars in revenue leakage.
It is relatively simple to control a single ERP environment. There will be one vendor master, one set of policies, and one central system in which to check transactions. Multi-ERP environments present challenges.
If your firm uses SAP, Oracle, and Microsoft Dynamics in its various divisions, there can be multiple entries for the same vendor. For example, “XYZ Technologies” in one system and “X Limited Tech Solutions” in another. Both vendors could have their own transaction histories, making it difficult to get the full picture of a vendor.
A double payment made in two ERPs might not raise any flags if the system is analyzing the transaction only in relation to its own data. The same applies to price negotiations done in one division and not noticed in the other.
This is how the process could work. In Europe, your procurement group has negotiated a 3% discount in exchange for quick payment with one of the suppliers. The discount clause is embedded in the contract, which resides in SharePoint. On the other hand, your AP group in America processes invoices in Oracle, and this AP group has no access to the contract.
For 12 months, the company ends up paying the total amount on invoices that should have received the discount. Considering that there are hundreds of vendors and thousands of invoices, the discrepancy may prove to be quite costly. Typical ERP processes cannot be configured to check the contract against the payment in different systems.
A second scenario would be receiving an invoice by email in Europe and loading it in SAP. After one week, the same vendor sends a restructured invoice to America and processes it in Oracle. The two systems may end up processing the two invoices since they see each as a unique transaction on their end.
ERP systems are good at processing transactions based on pre-defined criteria. The system links purchase orders with invoices, executes approval procedures, and posts general ledger entries. That is precisely what the ERP is supposed to do.
However, ERP standard controls may not have been set up to evaluate whether transaction details comply with agreements made outside of the ERP. Details of such agreements can include information stored in other systems or files, such as contract texts, emails, or payment plans.
Most controls over the accounts payable process use pattern matching. If there is already an invoice number, then the ERP can catch that fact. Nevertheless, if two invoices for the same product arrive with different numbers, or a credit from a vendor is posted to the wrong account, the system may not catch these issues.
Leakages that can be experienced due to the distribution of invoices, contracts, credits, and payments through multiple ERP systems include:
One of the most common types of leakage is when vendors submit invoices to various business units, each using different ERP systems. While normal duplication will apply to invoices submitted within the same ERP system, cross-system duplication may go unnoticed.
The terms of negotiated discounts or prices are frequently external to ERP systems. The lack of visibility into the negotiated terms makes it possible for AP teams to pay according to the billed amounts despite the terms of agreement being different.
Vendor credits that arise due to returns or correction of invoice issues might be sitting in one system while further payments continue through another system.
Due to changes in vendor billings or outdated pricing details, pricing can gradually diverge. This is hard to do in a large accounts payable system where there may be thousands of invoices and many ERP systems.
Discounts for early payments can be another area where leaks arise due to mismatches in payment schedules and agreements. The agreement may provide a discount of 2% if the payment of the bill is made within 10 days, but there may be a delay in the approval of invoices.
Companies assist the finance team within the enterprise environment in analyzing financial data within a fragmented ERP landscape for potential overpayments and payment errors.
The technology is built in such a way to ensure that there is more visibility with regards to transactions and supporting evidence. They are separated into different ERP systems, business units, and databases.
The companies will analyze the relationship between invoices, vendors, contracts, credits, and payments. These could help the finance team identify any potential areas where there are leaks that could be hard to identify using ERP controls individually.
This process could be used in both recovery and prevention. Once the finance team identifies the error, they could implement a recovery measure while investigating the reason behind the error.
In addition to recognizing revenue leakage, organizations must also improve their accounts payable process through the results obtained from the recovery and audit initiatives.
For instance, it is important to:
A multi-ERP environment may increase complications for the AP team as financial data may be located in various ERP environments, vendor files, processes, and business units.
This does not mean that ERP controls are ineffective. Such controls are absolutely necessary for proper transaction processing, approval, matching, and accounting reporting. However, some errors may become obvious only after comparing data from different systems and sources.
Examples of possible issues include cross-system duplicate payments, contract-to-payment errors, vendor credits that have not been applied, drifting prices, and missed early payment discounts. All these require additional analysis to detect leakage.
The objective of finance executives is to go further than just conducting correct transaction processing in individual systems. With the use of proper ERP controls, cross-system analysis, contract visibility, post-payment reviews, and recovery, companies will be able to detect preventable financial losses and leakage.
Discover Dollar helps finance teams conduct analysis of fragmented financial data and detect any overpayments and discrepancies.
Revenue leakage in AP is the unintended loss of money through payment errors like duplicate invoices, missed credits, and pricing mismatches. These errors happen during routine operations and accumulate over time.
Discover Dollar's AI-powered platform detects these errors across multiple ERP systems before they become significant financial losses.
Multiple ERP systems create data silos where the same vendor can exist under different names. Standard controls only flag issues inside a single system, so errors spanning two or more platforms go undetected.
Discover Dollar connects data across SAP, Oracle, Microsoft Dynamics, and other ERPs to close those blind spots.
ERP systems are built for transaction processing, not cross-system anomaly detection. They handle purchase order matching well, but they cannot interpret unstructured data like emails and contracts where payment terms originate.
A vendor sends slightly different invoice formats to two divisions on separate ERP systems. Each system treats the invoice as new because it only checks its own records.
Discover Dollar identifies these cross-system duplicates by analyzing transaction patterns at the vendor and amount level.
Start with a vendor master data review across all ERP systems to find suppliers listed under multiple names. Then compare contract terms against actual payments for your top vendors by spend.