Common examples of expense fraud include submitting a fake taxi receipt, inflating a hotel bill, claiming mileage for a personal errand, expensing a family dinner as a client meeting, buying personal electronics and coding them as office equipment, and invoicing an employer through a shell company the employee secretly controls. Different line items, same handful of tricks underneath.
The Four Mechanisms Behind Every Scheme
Every fraudulent expense claim, no matter how creative, uses one of four techniques. Knowing the mechanics matters more than memorizing individual stories, because the same building blocks show up whether someone is padding a mileage log or running a fake vendor.
- Fictitious expenses. Claiming reimbursement for a cost that never happened. The employee fabricates or alters a receipt to create a transaction that exists only on paper.
- Inflated expenses. Starting with a real purchase but doctoring the receipt to show a higher amount. The employee pockets the gap between what was actually paid and what gets reimbursed.
- Duplicate submissions. Submitting the same legitimate expense on multiple reports or across different accounting periods, banking on no one cross-referencing closely enough to notice.
- Mischaracterization. Buying something personal and coding it as a business expense. The purchase is real; the business justification is fabricated.
Most real schemes combine two or more. An employee might inflate a hotel receipt and then submit it a second time the following month. The combinations run in every direction, but the four mechanisms stay the same.
Travel and Meal Examples
Travel and entertainment is where the bulk of reimbursement fraud lives, because the transactions are frequent, variable, and hard to verify after the fact.
Flights and Hotels
A classic fictitious expense: an employee books a refundable flight, submits the confirmation for reimbursement, then cancels the ticket and keeps the money. The company pays for a trip that never happened.
A hotel version works the same way with inflation. The employee books a room at $150 a night, receives a discounted rate or loyalty credit, and submits a doctored receipt showing $300 a night. The $150 difference goes straight into their pocket.
Mileage
Mileage fraud is especially common because it’s easy to execute and hard to disprove. The IRS business standard mileage rate for 2026 is 72.5 cents per mile, so every fake mile puts real money in the claimant’s pocket.1Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile
The most frequent version is submitting a personal commute as business travel. The IRS draws a firm line here: driving between your home and your regular workplace is a personal commuting expense and is never deductible, no matter how far you live from the office or whether you take work calls during the drive.2Internal Revenue Service. Publication 463 – Travel, Gift, and Car Expenses Logging those miles as “client visits” or “site inspections” is straightforward mischaracterization.
Employees also pad legitimate trips. Someone who drives 20 miles to a client site but logs 60 collects reimbursement for 40 miles of phantom travel. Rounding up aggressively, adding side trips that never happened, and claiming visits to places the employee never actually went all sit in the same category.
Meals and Per Diem
Meal fraud is almost always mischaracterization. The employee takes family or friends out to dinner, then submits the receipt as a business meal with a fabricated attendee list and a vague description like “client relationship building.”
Per diem fraud works differently. Per diem payments are meant to cover lodging, meals, and incidental costs while an employee is away from their regular workplace.3Internal Revenue Service. Per Diem Payments Frequently Asked Questions Claiming one for a day spent working from home, or for a location the employee wasn’t actually in, is a fictitious expense.
The $75 Threshold
IRS rules don’t require documentary evidence for most business expenses under $75. Lodging is the exception; receipts are always required for hotel stays regardless of cost.2Internal Revenue Service. Publication 463 – Travel, Gift, and Car Expenses Some employees exploit this by keeping individual claims just below $75 to avoid triggering receipt requirements, then submitting a high volume of small fictitious expenses. Each amount looks unremarkable. Over months, the total climbs fast.
Supplies, Equipment, and Vendor Examples
Away from travel, the opportunities shift. Weak procurement controls and short approval chains are what make these schemes possible.
Personal Purchases Coded as Business Equipment
The straightforward version: an employee buys a gaming laptop and codes it “office equipment — new workstation.” Personal items like fitness trackers, headphones, and home appliances show up in expense reports under labels such as “miscellaneous supplies” or “ergonomic accessories” often enough that experienced auditors treat vague category descriptions as a red flag on their own.
Shell Company Invoicing
This is where expense fraud shades into something prosecutors take very seriously. The employee creates a fictitious vendor or shell company and submits invoices from that entity for services never performed: “consulting fees,” “IT support,” “market research.” Payment flows from the company to what looks like a legitimate vendor but actually lands in an account the employee controls. These schemes typically involve multiple fraudulent documents (fake contracts, forged work orders, fabricated correspondence) and can run for years if vendor onboarding is lax.
Return Kickbacks
An employee orders $1,000 worth of office supplies, returns $300 worth for a cash or store-credit refund, then submits the original $1,000 receipt for reimbursement. The company pays $1,000, the employee keeps $300, and the office ends up with $700 worth of actual supplies. It blends a real expense with an inflated claim, which is what makes it hard to catch without comparing purchase orders against inventory.
How These Schemes Get Caught
Most expense fraud is eventually discovered. Nearly half of all occupational fraud is detected through tips, often from coworkers who notice spending that doesn’t match a colleague’s role or travel schedule. The employee who talks about a weekend trip and then submits mileage for a “client visit” on the same dates is making it easy.
Automated expense-management platforms flag duplicate receipt numbers, claims that consistently land just below approval thresholds, spending patterns that diverge from peers in similar roles, and receipts that fail image-verification checks. The software doesn’t decide whether fraud occurred; it surfaces the transactions worth a closer look.
Targeted audits catch the rest. Cross-referencing expense claims against calendar entries, badge-in records, credit card statements, GPS data, and vendor databases can unravel months of fraudulent submissions in a single review.
What Expense Fraud Costs the Person Doing It
The consequences stack, and they don’t stop at getting fired.
Termination and Licensing
Discovery typically results in immediate termination for cause. Future employers who ask about the departure will learn what happened. For employees who hold professional licenses (CPAs, attorneys, financial advisors, real estate agents), a fraud-related termination or conviction can trigger disciplinary proceedings leading to suspension or permanent loss of the license.
Federal Criminal Exposure
Submitting a fraudulent expense report through any electronic system (email, a web portal, a company app) can constitute wire fraud under federal law. The statute reaches anyone who uses electronic communications as part of a scheme to obtain money through false pretenses, and it carries penalties of up to 20 years in prison along with substantial fines.4Office of the Law Revision Counsel. 18 USC 1343 – Fraud by Wire, Radio, or Television If any part of the scheme involves the postal service or a commercial carrier, such as mailing a forged receipt, the parallel mail fraud statute applies with identical maximum penalties.5Office of the Law Revision Counsel. 18 USC 1341 – Frauds and Swindles
For employees of organizations that receive federal funding, a separate statute targets theft or fraud involving $5,000 or more in property, with penalties of up to 10 years in prison.6Office of the Law Revision Counsel. 18 USC 666 – Theft or Bribery Concerning Programs Receiving Federal Funds State prosecutors can also bring theft, embezzlement, or forgery charges under their own criminal codes. The dollar threshold that turns a theft charge into a felony varies by state, generally somewhere between $500 and $2,500.
Civil Recovery
Employers almost always pursue civil recovery of the money. Beyond the principal, civil litigation can add attorney’s fees, investigation costs, and in some jurisdictions prejudgment interest on the fraudulently obtained funds. Forensic accounting and private investigation fees alone can run well into five figures, and courts often shift those costs to the person who caused them.
The Tax Trap
Fraudulent reimbursement money is taxable income. The IRS requires all income to be reported, including income from illegal activities.7Internal Revenue Service. Publication 525 – Taxable and Nontaxable Income Federal tax law defines gross income as “all income from whatever source derived,” and there is no exception for stolen money.8Office of the Law Revision Counsel. 26 US Code 61 – Gross Income Defined
An employee who pockets $20,000 in fraudulent reimbursements and doesn’t report it (virtually no one does) has now committed a separate offense: underreporting income. The IRS can impose an accuracy-related penalty of 20% on the underpaid tax, plus interest that accrues until the balance is paid.9Internal Revenue Service. Accuracy-Related Penalty In more serious cases, the failure to report can support a separate tax evasion charge on top of the underlying fraud. A few inflated receipts turn into a multi-front legal problem.