Expense Report Controls: Why Traditional Approaches Are No Longer Enough
Business expenses are one of the most exposed cost categories to non-compliance risk — yet one of the least continuously monitored. With exploding volumes and audit teams that aren't growing, it's time to rethink the logic of control.
The structural tension of T&E controls
The Travel & Expense (T&E) function holds a unique position in corporate finance. It is both one of the most visible — every employee is directly involved — and one of the most complex to manage. Unlike structured procurement or supplier payments, business expenses sit at the intersection of internal policy, employee trust, and day-to-day operational constraints.
For Finance and Internal Audit teams, this reality creates a permanent tension. On one side, strengthening controls is necessary to protect the organization. On the other, excessive pressure on reimbursements generates friction, delays, and a sense of distrust — which can lastingly affect team engagement.
T&E is a high behavioral density area: compliance depends on thousands of individual decisions, made every day, in highly varied contexts. It's not a category like any other.
This tension has intensified in recent years, driven by rising transaction volumes, geographic dispersion of teams, multiplication of submission channels (mobile apps, integrated travel management tools, corporate cards), and increasing pressure from audit committees on internal control quality.
The blind spot of sampling
Traditional T&E control frameworks rely on three levers: pre-approval workflows, expense policy rules, and post-submission reviews. Internal Audit teams complement this with periodic audits based on sampling — checking receipt completeness, amount consistency, and proper delegation application.
These practices remain fundamental. They were designed for a certain level of activity, at a certain time. The problem: they haven't been scaled to match organizational evolution.
In this context, risk no longer primarily manifests as obvious fraud or flagrant policy violations. It emerges as weak signals and repeated patterns: systematic rounding of amounts, clustered submissions at period-end, slightly atypical receipt structures, expenses whose category doesn't match the employee's usual activity.
These patterns are virtually invisible in sample-based audits. They don't surface in standard exception reports. Yet they represent the bulk of actual risk.
This is what we can call the structural blind spot of traditional approaches: risk is distributed across the entire transaction population, but control only applies to a subset.
The trap of "controlling more"
The instinctive response to this lack of visibility is to increase control volume: more transactions audited, more validations required, more receipts requested. This logic is understandable — but it produces well-documented adverse effects.
Multiplying controls without precise targeting creates workload without creating value. Worse: it can degrade the effective quality of control by saturating approvers.
When flagged transaction volume increases, approvers end up processing alerts mechanically. They validate to unblock the flow, without real examination. This is the approver fatigue phenomenon: paradoxically, the more you control, the less you actually control.
The three negative effects of untargeted over-control
- Approver fatigue: accumulation of low-relevance alerts, trivialization of the validation process, degraded detection of real cases.
- Employee experience friction: longer reimbursement delays, feeling of being systematically suspected, erosion of trust in the process.
- Disproportionate audit cost: teams spend time on low-risk transactions, at the expense of those deserving in-depth attention.
The conclusion is clear: the challenge isn't to control more transactions. It's to control better — to precisely identify transactions that present real risk.
Precision over volume: a new control logic
Advances in analytics and machine learning now make a fundamentally different approach to T&E control possible. Rather than applying static rules to a subset of transactions, the goal is to evaluate each transaction in its context.
| Dimension | Traditional approach | Analytical approach |
|---|---|---|
| Scope | Sample (5–10% of transactions) | 100% of transactions analyzed |
| Risk signal | Static rules (thresholds, categories) | Contextual multi-variable score |
| False positives | High, significant processing load | Reduced, effort focused on real risk |
| Timing | Post-facto audit (periodic) | Real-time / near real-time detection |
| Traceability | Human judgment, variable | Documented and reproducible decisions |
The impact is significant. False positives decrease, reducing team workload and preserving the employee experience. Cases that surface in the review queue are those that truly deserve attention.
Precision isn't simply an operational advantage. It's a structural improvement in control effectiveness.
Toward control integrated into the transaction flow
The most mature T&E environments don't rely on additional layers of post-submission review. They integrate risk detection directly into the workflow — at the very moment the transaction is submitted.
An anomaly detected at submission costs a few minutes of processing. The same anomaly detected three months later during an audit can involve weeks of investigation, follow-ups, accounting corrections — and potentially regulatory exposure.
Link with electronic invoicing reform
In France, the mandatory electronic invoicing reform — whose progressive deployment begins in September 2026 — further reinforces this continuous control challenge. Organizations that have implemented continuous monitoring on their T&E flows will be better positioned to leverage this informational richness.
Strengthening controls without degrading the employee experience
An effective T&E program relies on a balance between responsibility and trust. Employees are expected to follow expense policy; in return, they expect fair treatment, fast reimbursements, and consistency in rule application.
If controls are perceived as intrusive or arbitrary, this balance collapses. Conversely, precise and consistent control becomes almost invisible to compliant users. Standard transactions pass without friction. Exceptions receive clearly justified and documented treatment.
Control precision is a form of respect for employees acting in good faith. It spares them unnecessary delays or questioning — and focuses attention where it's truly needed.
The renewed role of internal audit
As T&E controls modernize, the role of Internal Audit evolves as well. Core activities — control testing, policy evaluation, process review — remain essential. But the availability of continuous transaction analysis enables audit teams to operate in a more proactive and strategic manner.
This evolution allows audit teams to contribute more directly to prospective risk management — not just after-the-fact observation.
TEVASOFT supports you
At TEVASOFT, we help Finance, Internal Audit, and IT teams modernize their T&E controls. Our expertise in integration and automation enables the shift from sample-based auditing to continuous, precise monitoring adapted to your constraints. Contact us to discuss your project.