Travel and expense management is how a company plans, approves, records, and controls the money employees spend on business travel and out-of-pocket costs. It has three layers, meaning booking, capture and approval, and verification. Most programs build the first two well and leave the third to a sample reviewed by a person.
Key takeaways
- Approval is not verification. A manager working through thirty reports is making a business judgment about whether spending looks reasonable, not checking whether a claim is true.
- GBTA forecast global business travel spending of $1.71 trillion for 2026, up 7.2 percent, against 1.84 billion trips, up 1.3 percent. The same number of trips costs more each year, so the company loses more money through a control gap of the same proportion.
- Auditors in manual programs review 10 to 20 percent of expense transactions, a level set by auditor capacity rather than by risk. About 80 percent of spend is then reimbursed on trust.
- Closing the verification gap does not require replacing the expense system, because an audit layer reads reports and card data straight from the existing system.
Treating this category as one system makes weak points hard to locate. Split it into three layers instead. Booking commits the cost, capture and approval set how much friction employees feel, and verification sets what the organization actually pays for. The third layer is where leakage occurs, and whether an organization has a verification layer is a question with a measurable answer.
The scale of business travel spending
The Global Business Travel Association published its 2026 Business Travel Index on August 3, 2026. It forecasts global business travel spending of $1.71 trillion in 2026, an increase of 7.2 percent. Trips worldwide are expected to surpass 1.84 billion, up 1.3 percent from an estimated 1.82 billion in 2025. The increase comes from price rather than from volume.
That arithmetic matters to finance teams. The same number of trips costs more each year, so the company loses more money through a control gap of the same proportion. Travel and expense spending is usually the second or third largest controllable cost line in a large organization. It is also the line where the person who spends is furthest from the person accountable for the budget.
The category is also one where the underlying evidence has become less reliable. Reimbursement has always rested on the assumption that a receipt records something that happened. Generative artificial intelligence (AI) tools, meaning software that produces realistic text and images on request, weakened that assumption within roughly eighteen months. The change affects what a control has to do, not only how quickly it has to do it.
The three layers of travel and expense management
Layer one, book. This layer covers travel policy, preferred suppliers, negotiated rates, pre-trip approval, and duty of care. Cost is committed at this layer, and it is the only layer at which the amount still changes.
Layer two, capture and approve. This layer covers receipt capture, corporate card feeds, mileage, coding to the general ledger (GL), manager approval, and reimbursement. Most software sold in the category targets this layer, and most large organizations have automated it well.
Layer three, verify. This layer confirms that an approved claim was accurate, tested against policy, tax rules, the corporate card feed, and the organization's wider spending history. In most programs this layer amounts to a sample reviewed by a person, or to nothing at all.
Approval is commonly mistaken for verification. A manager approving a report is judging whether the spending looks reasonable for the trip, in a queue of thirty other reports, with a few seconds available for each line. That is a business judgment rather than a check, and workflow automation does not convert it into a check.
What each layer controls
Layer one sets the size of the problem
Policy design and pre-trip approval are the least expensive controls available, because they apply before money is committed. Rules on class of service, lodging caps tied to a published benchmark, and an approval threshold matched to real risk appetite reduce the total bill more than any later detection does. Federal per diem rates, the daily allowances the United States government sets for its own travelers, give a defensible external anchor. The FY2026 standard rate for the continental United States, set in Per Diem Bulletin FTR 26-01, is $110 for lodging plus $68 for meals and incidental expenses. Those figures hold at the FY2025 level and apply to travel through September 30, 2026.
Layer two sets how much friction employees feel
Capture quality is a question of employee experience far more than of control. Prompt reimbursement, working card feeds, and automatic coding reduce the workarounds that create control problems in the first place. When reimbursement is slow, employees turn to personal cards, bookings made outside approved channels, and late bulk submissions, all of which are harder to verify afterwards.
Layer three sets what an organization actually pays for
Verification is where leakage occurs, and the forms it takes are well documented.
- Duplicate claims arrive across periods or from several employees.
- Spending gets split across several claims so that each falls under an approval threshold.
- Personal purchases sit on a corporate card and never appear in the expense system.
- Out-of-policy merchant categories get coded to an innocuous account.
- Receipts do not correspond to a real merchant, a real amount, or a real business purpose.
None of these are visible in the approval queue. Each becomes visible when a claim is compared against the submitter's own history, other employees' reports, and the card feed.
Measuring coverage before payment
The single most informative measure in a program is the share of travel and expense spending that receives a substantive review before payment.
Auditors in manual programs review 10 to 20 percent of expense transactions, a gap examined in our analysis of 100 percent audit coverage. A human auditor needs roughly twenty minutes for each report, and headcount is finite. At that level about 80 percent of spending is reimbursed on trust, and every finding a team reports comes from the reviewed fifth.
Two further measures belong alongside it. The first is the share of exceptions caught before payment rather than after, since recovery on reimbursed employee spending is poor once the pay cycle closes. The second is the repeat violation rate by employee, which shows whether the program deters anything rather than how much activity it generates. Schemes that nobody is looking for last for long periods. The Association of Certified Fraud Examiners drew on 2,402 cases across 143 countries and territories for Occupational Fraud 2026 and put the median scheme at 12 months before detection. The median loss was $104,000 per case.
Where current tools fall short
Nearly every product sold in this category competes on layers one and two. Booking gets easier, capture gets faster, cards get more informative, and the approval workflow gets shorter. Those are real improvements, and each of them assumes the submitted evidence is accurate.
Audit is usually offered as a configurable rules engine combined with a sampling percentage. Rules catch only what someone anticipated and wrote down in advance, so a new pattern stays invisible until a person notices a trend. Rules also generate volume without judgment, so teams tune thresholds down until the queue becomes workable, which quietly reduces coverage again. The result is a program that reports a large number of flags and still reimburses a forged receipt, because no rule asks whether the restaurant named on it exists.
How we approach travel and expense management
We do not sell a booking tool or an expense system, which is a deliberate choice. Our platform reads from whichever systems an organization already runs and performs the third layer.
Our AI reads every line of every receipt on every report before reimbursement, and every corporate card transaction as it posts. Each claim is checked in a single pass against policy, tax requirements, the merchant's real-world existence, the submitter's own history, other employees' reports, and the card feed. Exceptions are ranked by risk and by dollar value, so clean reports clear without human attention and auditors spend their time on the reports where the money is at risk.
Enterprises running full-coverage expense report auditing on our platform reach automation rates above 80 percent and reduce finance operating costs by up to 50 percent. Databricks kept its existing expense system and added audit on top of it, reaching 72 percent auto-approval and $483,000 in wasteful spend removed, as its T&E control case study describes.
The bottom line
Work out what share of travel and expense spending a person or a model reviews before the money leaves the company. An inability to produce that number is itself a finding. Where the figure is near the common range of 10 to 20 percent, coverage is the largest control gap in the program. Improvements to booking or capture will not close it. Our AI expense audit page describes what full pre-payment review does with the other 80 percent.
Frequently asked questions
What is travel and expense management?
Travel and expense management is the set of policies, systems, and controls a company uses to plan, approve, record, and verify money employees spend on business travel and out-of-pocket costs. It spans booking, receipt capture, approval, reimbursement, and audit.
What is the difference between travel and expense management and expense management?
Expense management covers all employee-initiated spend, including software, supplies, and client entertainment. Travel and expense management is the subset tied to business travel, which adds booking, per diem, mileage, lodging, and duty of care obligations.
How much of a company's travel and expense spend is usually audited?
Auditors in manual programs review 10 to 20 percent of expense transactions, a level set by auditor capacity rather than by risk. Audit that runs before payment and uses AI removes the capacity constraint and reviews every report and card transaction.
Does travel and expense management require replacing our expense system?
No, replacing the system is not necessary. Booking, capture, and approval are separate functions from verification. An audit layer reads reports and card data straight from the existing system, so the control gap closes without a platform migration.
What metrics should a travel and expense program report?
Report pre-payment audit coverage, the share of exceptions caught before payment, average days to reimbursement, cost per expense report, and repeat violation rate by employee. The last of these measures deterrence rather than activity.