Common examples of expense fraud include submitting a receipt for a personal dinner as a client meeting, inflating a hotel bill, claiming mileage for errands that never happened, booking a refundable flight and canceling it after reimbursement, 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 four underlying tricks.
The Four Mechanics Every Scheme Uses
Whatever the receipt looks like, expense fraud reduces to one of four moves, and most real schemes mix two of them.
- Fictitious expenses. A cost that never happened. The employee fabricates or alters a receipt so a transaction exists only on paper.
- Inflated expenses. A real purchase doctored to show a higher amount. The employee keeps the gap between what was paid and what was reimbursed.
- Duplicate submissions. The same legitimate receipt submitted twice, often on different reports or in different months, on the bet that no one cross-references closely.
- Mischaracterization. A real personal purchase coded as a business expense. The money moved; the business purpose is invented.
An employee who inflates a hotel receipt and then submits it again the following month is running two of these at once. The combinations change; the building blocks do not.
Travel and Meal Examples
Travel and entertainment is where most reimbursement fraud lives because the transactions are frequent, variable, and hard to verify after the fact.
Flights and Hotels
A classic fictitious expense: book a refundable flight, submit the confirmation, cancel the ticket, and keep the reimbursement. The company pays for a trip that never happened. The hotel version is inflation. An employee books a room at $150 a night, gets a discount or loyalty credit, and submits a doctored receipt for $300. The $150 difference goes straight into their pocket.
Mileage Padding and Personal Commutes
Mileage fraud is especially common because it is 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 claimed turns into real money.1Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile The most frequent version is logging a personal commute as business travel. The IRS draws a firm line: driving between home and your regular workplace is a personal commuting expense and is never deductible, regardless of distance or whether you took work calls on the way.2Internal Revenue Service. Publication 463 – Travel, Gift, and Car Expenses Submitting those miles as “client visits” is mischaracterization.
Employees also pad legitimate trips, round up aggressively, or claim visits to places they never went. Driving 20 miles to a client site but logging 60 collects reimbursement for 40 phantom miles.
Meals and Per Diem
Meal fraud is usually mischaracterization. The employee takes family or friends to dinner and submits the receipt as a business meal with a fabricated attendee list and a vague note like “client relationship building.” Per diem fraud works differently. Per diem payments are meant to cover lodging, meals, and incidentals when 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 is a fictitious expense.
The $75 Receipt Threshold
IRS rules do not require documentary evidence for most business expenses under $75, with lodging as the exception, since hotel stays always need receipts regardless of amount.2Internal Revenue Service. Publication 463 – Travel, Gift, and Car Expenses Some employees exploit this by keeping each claim just below $75 to avoid triggering receipt requirements, then submitting a high volume of small fictitious expenses. Any single claim looks unremarkable. The totals add up fast.
Supplies, Equipment, and Vendor Examples
Non-travel categories offer their own openings, especially where procurement controls are weak or approval chains are short.
Personal Items Coded as Office Equipment
The simplest version is buying personal electronics and submitting the expense as work equipment. A gaming laptop becomes “office equipment — new workstation.” Fitness trackers, headphones, and home appliances show up as “miscellaneous supplies” or “ergonomic accessories” often enough that experienced auditors treat vague category labels as a red flag on their own.
Shell Company Invoicing
This is where expense fraud shades into something prosecutors take seriously. The employee sets up a fictitious vendor or shell company and submits invoices from that entity for services never performed, such as “consulting fees,” “IT support,” or “market research.” Payment flows out to what looks like a legitimate vendor but lands in an account the employee controls. These schemes often involve fake contracts, forged work orders, and fabricated correspondence, and can run for years when vendor approval is lax.
Return Kickbacks
An employee orders $1,000 of office supplies, returns $300 worth for a cash or store-credit refund, and submits the original $1,000 receipt. The company pays $1,000, the employee pockets $300, and the office receives $700 of actual supplies. It blends a real expense with an inflated claim and is hard to catch without comparing purchase orders to inventory.
How These Schemes Get Caught
Nearly half of all occupational fraud is detected through tips, usually from coworkers who notice spending that doesn’t match someone’s role or travel schedule. The employee who posts about a weekend trip and submits mileage for a “client visit” on the same dates has already done the hard part for the tipster.
Modern expense platforms flag duplicate receipt numbers, claims that cluster just below approval thresholds, spending patterns that drift from peers in similar roles, and receipt images that fail verification checks. The software doesn’t make the call; it surfaces the transactions that deserve a second look.
Some organizations require employees in financial roles to take consecutive days off so a replacement handles their work. That breaks the information control long-running schemes depend on. An employee who never takes vacation, particularly one who handles purchasing or reimbursements, becomes a flag in itself.
Targeted audits that cross-reference expense claims against travel records, calendar entries, credit card statements, badge-in times, and GPS data can unravel months of fraudulent claims in a single review.
Employment, Criminal, and Civil Consequences
Discovery usually brings immediate termination for cause, and that termination tends to follow the person. Future employers asking about the circumstances of 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 that lead to suspension or permanent loss of the license.
Federal exposure is broader than most people assume. Submitting a fraudulent expense report through any electronic system (email, a web portal, a company app) can constitute wire fraud, which covers anyone who uses electronic communications in a scheme to obtain money through false pretenses and carries penalties of up to 20 years in prison.4Office of the Law Revision Counsel. 18 USC 1343 – Fraud by Wire, Radio, or Television If any part of the scheme touches the postal service or a commercial carrier, such as mailing a forged receipt, the parallel mail fraud statute applies with the same maximum.5Office of the Law Revision Counsel. 18 USC 1341 – Frauds and Swindles
Employees of organizations that receive federal funding face an additional statute targeting theft or fraud involving $5,000 or more in property, with penalties up to 10 years.6Office of the Law Revision Counsel. 18 USC 666 – Theft or Bribery Concerning Programs Receiving Federal Funds State prosecutors can bring theft, embezzlement, or forgery charges under their own codes. The dollar threshold that turns theft into a felony varies by state, generally running from $500 to $2,500.
Employers almost always pursue civil recovery of the stolen funds. Beyond the principal, civil litigation can add attorney’s fees, investigation costs, and in some jurisdictions prejudgment interest. Forensic accounting and private investigation fees 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 because federal tax law defines gross income as “all income from whatever source derived,” with 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 committed a separate offense: underreporting income. The IRS can impose an accuracy-related penalty of 20% on the underpaid tax, plus interest that keeps accruing until the balance is paid.9Internal Revenue Service. Accuracy-Related Penalty In the more egregious cases, the failure to report can support a separate tax evasion charge. The criminal and tax exposure stack, and what started as a few inflated receipts becomes a multi-front legal problem.
If You’re the One Reporting It
Employees who witness expense fraud have legal protection against retaliation. Under Sarbanes-Oxley, publicly traded companies and their subsidiaries cannot fire, demote, suspend, threaten, or otherwise retaliate against an employee who reports conduct they reasonably believe constitutes wire fraud, mail fraud, bank fraud, securities fraud, or a violation of SEC rules. The protection applies to internal reports to a supervisor, reports to a federal agency, and reports to a congressional committee.10Office of the Law Revision Counsel. 18 USC 1514A – Civil Action to Protect Against Retaliation in Fraud Cases
An employee who faces retaliation can seek reinstatement, back pay with interest, and compensation for litigation costs and attorney’s fees.10Office of the Law Revision Counsel. 18 USC 1514A – Civil Action to Protect Against Retaliation in Fraud Cases Filing deadlines vary by statute but federal deadlines generally fall between 30 and 180 days from the retaliatory action.11Occupational Safety and Health Administration. OSHA Online Whistleblower Complaint Form Waiting too long can forfeit the claim entirely, so check the applicable deadline before the situation escalates.