The processing of supplier invoices is not limited to a reception-validation-payment circuit. Behind this process lie gray areas that the accounting department manages daily without always formalizing them: discrepancies in reconciliations absorbed in silence, incorrectly assigned deductible VAT, validation delays that explode without anyone measuring their real cost. The reform of B2B electronic invoicing, now framed by sanctions per invoice, makes these blind spots riskier than before.
Invoice-Order Reconciliation: Discrepancies Absorbed by Accounting Without Reporting
An order form for 4,800 euros, an invoice for 4,920 euros. The discrepancy is small, the supplier is strategic, the accountant records the entry. We observe this pattern in the majority of accounting departments, regardless of the company’s size.
The problem is not the occasional discrepancy. It is the absence of a formalized tolerance threshold. Without a written rule (percentage or fixed amount beyond which the discrepancy triggers an investigation), the three-way reconciliation (order, receipt, invoice) loses its control function. An undocumented discrepancy becomes a tacit precedent, and suppliers who know this adjust their prices accordingly.
The question to ask the accounting department is not “how many invoices have you rejected this month,” but “how many discrepancies have you validated without returning to the ordering party.” The answer is rarely available because these micro-decisions leave no trace in the accounting information system.
Companies that undertake a project for supplier invoice dematerialization often discover the extent of these discrepancies when setting up automatic validation workflows. Digitization requires defining what had remained implicit.
Deductible VAT on Supplier Invoices: Silent Allocation Errors
The deduction of VAT on purchase invoices is a right, not an automatic process. We recommend checking three points that the accounting department sometimes handles by habit rather than effective control.
- The mention of the supplier’s intra-community VAT number: its absence on the invoice makes the VAT non-deductible, even if the amount is correct and the payment has been made.
- The consistency between the nature of the expense and the expense account used: an invoice for catering allocated to a reception account does not open the same deduction rights as an invoice allocated to a travel expense account.
- The actual triggering event: VAT is deductible upon delivery of the good or execution of the service, not at the date of receipt of the invoice. A timing discrepancy can distort the VAT declaration without the error being detected before a tax audit.
These errors do not cause immediate accounting rejection. They accumulate and only reveal themselves during an accounting audit, sometimes several years later.
Sanctions Related to Electronic Invoicing: The Risk Underestimated by Accounting
The mandatory B2B electronic invoicing and e-reporting system, framed by decree n° 2026-677 and the ordinance of July 27, 2026, has introduced a sanctions regime that modifies the risk matrix of the accounting department.
A fine can be applied for each invoice not issued in the required electronic format, with an annual ceiling provided by the 2026 finance law. Popular sources mention a flat penalty for each non-structured invoice and a fine for failing to register on an approved platform. These amounts are now confirmed by the texts of 2026.
The point that the accounting department does not always measure: the risk lies in the technical format of the invoice, not just in the payment. An invoice paid on time but transmitted in the wrong format (simple PDF instead of a structured format via a partner dematerialization platform) exposes the company to a sanction. Meeting payment deadlines is no longer sufficient to close the matter.
Partner Dematerialization Platform and Public Invoicing Portal
The choice between an approved PDP (partner dematerialization platform) and the PPF (public invoicing portal) has direct consequences on the accounting process. The PDP offers validation and routing services that the PPF does not provide natively. We observe that accounting departments that did not participate in the platform choice end up with format constraints that they discover at the time of production.
Internal Validation Delays: The Hidden Cost of the Approval Circuit
The average time between receiving a supplier invoice and its accounting entry rarely depends on the accounting department itself. Operational validation (the “good to pay” from the ordering party) accounts for the majority of processing time.
This delay has two direct financial consequences:
- The loss of discounts for early payment: many suppliers offer a discount conditioned on payment within ten or fifteen days. An approval circuit that takes three weeks makes this discount inaccessible.
- The risk of late penalties: fixed compensation for recovery costs and late interest accrue from the invoice’s due date, not from the internal validation date. Internal approval delays do not suspend the legal countdown.
- The impact on supplier relationships: a supplier consistently paid late eventually incorporates this risk into their prices or reduces their payment terms, which degrades operational margin without the link being visible in the accounts.
The accounting department suffers from these delays but often lacks the authority to reduce them. The key data to monitor is the cycle time between receipt and approval, broken down by department. Without this measure, no corrective action is possible.
Most of the dysfunctions described here share a common cause: the lack of formalization. Tolerance thresholds for discrepancies, VAT allocation rules by nature of expense, maximum approval delays by department – all this exists in the minds of experienced accountants, rarely in a written reference.
The transition to mandatory electronic invoicing is an opportunity to document these rules. Dematerialization platforms require explicit parameters where manual processing tolerated the implicit.
