Rogue Spend: How Finance Leaders Can Regain Control

Travel and expense (T&E) represents a major controllable cost category on a corporate balance sheet. Yet a significant share of that spending happens outside approved channels, bypassing negotiated rates, escaping policy controls, and arriving on the finance team’s radar after the money has been spent. Tightening the written policy alone often doesn’t close the gap when the systems enforcing that policy stay the same.

Organizations either enforce compliance before money is spent or catch violations afterward. Rogue spend, also called maverick spend, shadow spending, or off-contract purchasing, persists because the systems and incentives around employees often make noncompliance the easiest option.

To close that gap, finance leaders need to understand the hidden costs of unmanaged expenses, why employees book off-platform, and which controls can restore visibility and control.

The True Cost of Rogue Spend

Direct overspend on an off-contract flight or hotel room is the most visible cost of rogue purchasing, but it’s rarely the biggest one. The effects show up across supplier relationships, compliance, and financial close cycles, often in budget lines far removed from the T&E category itself. If you lead a finance function, you’ll usually feel those hidden costs in three places.

Eroded Negotiating Leverage and Supplier Relationships

Preferred vendor agreements depend on committed or credibly projected spend volume. When a meaningful share of your organization’s travel happens outside managed channels, the actual spend data presented during supplier negotiations understates your true purchasing power. This creates a two-stage loss: Travelers pay higher rates on individual off-contract bookings, and the organization loses the volume thresholds needed to secure better discount tiers in subsequent renewal cycles.

Industry data underscores the scale of the problem. The State of Corporate Travel and Expense 2026, a report from Skift and Navan, found that 80% of the business travelers surveyed sometimes book off-platform. That level of off-platform booking can weaken even well-negotiated supplier agreements.

Duty of Care Gaps and Compliance Risk

When employees book through consumer platforms, itineraries don’t flow into corporate travel management systems. In a crisis, such as a medical emergency, natural disaster, or civil unrest, your organization may not be able to locate, contact, or assist the affected traveler. This creates an operational gap, and employers may still carry duty of care responsibilities for traveling employees, whether or not the company knew about the trip.

Beyond physical safety, fragmented T&E data widens the window for undetected policy violations and fraudulent submissions. As internal audit functions work through limited budgets and headcount, the population of transactions that exists outside the enforcement infrastructure becomes harder to test and more expensive to review.

Delayed Financial Close and Degraded Forecasting

Late, incomplete, and miscategorized expense submissions extend the month-end close and introduce systematic variance into period-end financials. When reports arrive after the close deadline, T&E accruals must be estimated rather than calculated from actuals. That variance ripples into management accounts used for board reporting, covenant compliance, and FP&A planning.

When a significant share of travel spend occurs outside managed channels — as the Skift and Navan data cited above suggests — real-time visibility into T&E spending becomes much harder. The data your finance team relies on may reflect only part of total T&E outlay. That makes the reasons employees book off-channel worth examining next.

Why Employees Book Outside Approved Channels

Most off-channel booking comes from system design and incentives, not a compliance attitude problem. Research consistently shows that travelers who bypass corporate tools are responding to rational incentives, not acting out of defiance. Understanding those root causes is a prerequisite to solving them. Most leakage comes from three recurring issues.

Booking Tools That Can’t Compete With Consumer UX

Employees use consumer travel apps in their personal lives. When your corporate booking tool feels slower, returns fewer options, or requires more clicks, the path of least resistance leads straight to a consumer platform. Innovation gaps and poor mobile experiences are common pain points with online travel tools. The problem grows under time pressure, because travelers default to what feels easiest and most familiar, not what’s most compliant.

Inventory Gaps That Make Noncompliance Logical

When your approved booking channel doesn’t surface the best available fare because it lacks NDC connections, direct hotel content, or competitive pricing, going off-platform becomes financially justifiable. Employees may genuinely believe they’re saving the company money. This belief is sometimes correct: if the tool’s inventory is incomplete, the compliant option may genuinely cost more. Solving this requires closing the content gap, not just mandating compliance. Navan Travel combines:

• GDS content
• NDC airline connections
• OTA partnerships
• Direct supplier connections

That breadth of inventory helps close the content gap that drives travelers off-platform in the first place.

Policies Too Long to Read, Too Strict to Follow

Lack of policy awareness, not just willful noncompliance, is a common driver of out-of-policy behavior. Many corporate travel guidelines are long enough to create a structural barrier to employee comprehension. When travelers don’t know the rules, they can’t follow them. And when they do know the rules but find them too rigid for real-world conditions, such as client meetings that require a specific hotel, conference room blocks, or time-sensitive itineraries, deviations become a coping mechanism.

Effective expense policy compliance depends on policies that are short enough to internalize and flexible enough to accommodate legitimate exceptions. Compliance improves when the approved path is easier to use.

4 Strategies to Regain Control of T&E Spend

Controlling rogue spend requires shifting your enforcement from post-trip discovery to pre-spend prevention. Written policies set expectations, but the platform enforcing those policies has a bigger effect on whether employees actually follow them.

These four strategies tie policy intent to actual spending behavior through booking controls, approval workflows, payment-layer safeguards, and incentives that make compliance easier to follow.

1. Enforce Policy Within the Booking Workflow

Pre-spend controls embedded directly in your booking workflow address the single largest compliance failure: purchases made outside approved channels. Instead of flagging violations during expense reconciliation later, rules surface at the moment of decision, restricting visible options or requiring justification for out-of-policy selections.

A Forrester Consulting Total Economic Impact™ study commissioned by Navan and based on a composite organization found that organizations on the platform achieved a 16% average reduction in annual travel spend. That result shows what can happen when policy is built into the booking process rather than left as guidance.

2. Automate Approval Workflows to Remove Bottlenecks

Manual approval routing introduces delays, inconsistency, and audit gaps. When trip requests sit in a manager’s inbox, travelers are incentivized to book first and seek forgiveness later. Automated workflows route requests based on configurable rules, such as cost center, trip value, and employee level, with escalation logic and timestamped audit trails that help eliminate the guesswork.

Navan Expense uses a policy system that controls spend at the point of swipe based on preconfigured rules. Depending on the policy, transactions are auto-approved, flagged for review, or declined. That helps reduce the time finance teams spend on manual processing, since exceptions surface in real time rather than during the close cycle.

3. Use Corporate Card Controls as a Payment-Layer Safety Net

Card-level controls operate independently of the booking channel. Virtual cards with predefined spending limits, merchant restrictions, and real-time transaction monitoring helps enforce policy even when a traveler books outside the approved tool. This layer is especially valuable for closing the gap that booking-channel controls can’t reach on their own.

The Forrester TEI study, based on a composite organization, also found that Navan customers saved finance teams 40% of the time previously spent on expense auditing. Automated data capture at the payment layer helps reduce manual review work.

4. Incentivize Compliance Instead of Just Policing It

Enforcement alone can create friction between your finance team and the rest of the organization. Incentive programs reward travelers for making cost-conscious choices instead. The Skift and Navan report found that 72% of the travelers surveyed said they would book less expensive hotels if offered financial incentives.

Navan Rewards offers a solution. It lets employees keep a portion of the savings when they book under budget, aligning individual behavior with organizational cost goals. Because these decisions happen in the moment, broader oversight across every transaction matters more than a limited sample.

How AI Shifts Spend Oversight From Sampling to Full Coverage

One of the biggest operational changes AI brings to T&E oversight is less reliance on sampling. Traditional expense auditing often reviews only a subset of transactions because examining every submission manually isn’t feasible at scale. AI-powered systems help remove much of that bottleneck, enabling real-time review rather than periodic checks on a fraction of submissions. That shift frees your finance team to focus on exception management and strategic analysis instead of transaction-level data entry — especially valuable when headcount is constrained.

Two capabilities make this practical: detecting anomalies in real time and matching and categorizing receipts automatically.

Real-Time Anomaly Detection at the Point of Transaction

Pattern-based detection identifies policy violations, duplicate submissions, and suspicious transaction patterns as they occur, not later during a monthly audit cycle. Machine learning models trained on historical spending data flag anomalies that rule-based checks would miss, such as gradual spending escalation or unusual merchant patterns.

Navan Expense powers this capability through purpose-built AI agents. The platform’s Audit Agent helps review every transaction and surface only the spend that needs attention, including out-of-policy purchases hidden within compliant-looking expenses, while exceptions are flagged for human review. This approach helps shift the auditor’s role from processing every report to investigating the ones that actually warrant attention.

Automated Receipt Matching and Expense Categorization

Receipt matching is one of the most time-consuming steps in expense processing. When an employee swipes a corporate card, an AI-powered system captures transaction details, matches them against submitted receipts, and applies the correct GL codes and cost-center assignments without manual input. Navan takes this approach with its Expense Agent, which can help by reading receipt data and matching it to transactions automatically, feeding downstream reporting and reconciliation without requiring manual data entry.

For your accounting team managing month-end close, that often makes a meaningful difference. Clean, pre-categorized data flowing directly into ERP systems through direct ERP integrations with NetSuite, QuickBooks, and Xero helps create a more efficient reconciliation process. As one Navan customer in the Forrester TEI study put it: “Employees do not submit expense reports anymore.”

That operational change reinforces the article’s central point: rogue spend is easier to control when enforcement and visibility are built into the system.

From Leakage to Leverage

You regain control of rogue spend when you recognize that the problem is structural, not cultural. Employees often book through unapproved tools because the compliant path is harder, slower, or more limited than the alternative.

The strategies in this guide share the same principle: Make the right choice the easy choice.

• Enforce policy where decisions happen, not weeks afterward.
• Close inventory gaps so travelers don’t need to look elsewhere.
• Automate the workflows that create friction and delay.
• Reward the behavior you want to see instead of only punishing the behavior you don’t.

When your T&E infrastructure handles enforcement, visibility, and incentives on a single platform, rogue spend becomes a measurable, manageable metric instead of a recurring compliance problem. That shift gives finance leaders more control and makes rogue spend easier to manage.