Expense Reports: How to Set Up a Policy That Works (and What the IRS Requires)
Expense reports serve two purposes: they protect your business’s tax deductions, and they control how employees spend company money. Done well, they’re a 30-minute monthly process per employee. Done poorly, they’re a year-end scramble that costs you deductions. Here’s how to set them up correctly.
What the IRS Actually Requires
Business expenses are deductible if they’re “ordinary and necessary” for your business. But the IRS has specific substantiation requirements — especially for certain expense categories. Without adequate records, deductions can be disallowed even if the expenses were completely legitimate.
For most business expenses, you need:
- Amount
- Date
- Business purpose
- Receipt (for expenses over $75, required; under $75, strongly recommended)
For meals, you additionally need:
- The names and business relationship of the people present
- The business purpose discussed
For vehicles, you need a mileage log — date, destination, business purpose, and miles driven for each trip.
The IRS’s “Cohan Rule” allows some estimation when exact records are unavailable, but courts have repeatedly narrowed this rule. The safest position: contemporary documentation, created at the time of the expense.
The Accountable Plan: The Proper Structure for Reimbursements
If employees spend their own money on business expenses and you reimburse them, those reimbursements are tax-free to the employee (no payroll taxes, no W-2 inclusion) only if they’re paid under an accountable plan.
An accountable plan requires:
- Business connection: The expense must be for business purposes
- Substantiation: The employee must provide adequate records (receipts + purpose)
- Return of excess: If you advance money and the employee doesn’t spend all of it, they must return the excess within a reasonable time
If your reimbursement policy doesn’t meet these three criteria, employee reimbursements are treated as taxable compensation — you owe payroll taxes, and the employee owes income tax on the reimbursement. This is a common mistake in informally-run businesses.
Corporate Cards vs. Employee Reimbursement: The Real Comparison
| Category | Corporate Cards | Reimbursement |
|---|---|---|
| Employee experience | Easier — no out-of-pocket | Employees front the money |
| Visibility | Real-time spend visibility | Delayed (filed after the fact) |
| Receipt capture | Usually automated by app | Employee responsibility |
| Accounting integration | Direct to accounting software | Manual or semi-automated |
| Controls | Spend limits per card | Policy-dependent |
| Best for | Teams with frequent spending | Occasional expenses |
The trend: Corporate card programs (Ramp, Brex, and to a lesser extent AMEX for business) have largely displaced manual expense reports for high-spending employees. Real-time receipt capture via mobile app, automatic accounting integrations, and per-card spend limits eliminate most of the manual work.
For most businesses above $500K revenue with multiple employees or contractors who regularly incur expenses, a corporate card program is more cost-effective than a manual expense report process — even accounting for the software cost.
Modern Expense Management Tools (2026)
Ramp: The strongest option for most small-to-midsize businesses. Unlimited virtual and physical cards, real-time receipt matching, AI-powered categorization, direct sync with QuickBooks and Xero, and zero fee for the basic version. Ramp also identifies duplicate expenses, vendor savings opportunities, and expense policy violations automatically.
Brex: Similar to Ramp, with stronger enterprise features and additional services (banking, venture debt). Better fit for VC-backed companies that want the full financial stack in one platform.
Expensify: The established player in expense management software — still widely used, especially for employee reimbursement workflows. More manual than Ramp/Brex for card programs.
QuickBooks + receipt capture: For businesses already in QuickBooks, the built-in receipt capture and expense categorization is adequate for low-volume expense management.
Writing Your Expense Policy
An expense policy doesn’t need to be long — it needs to be clear. Cover:
What’s reimbursable (and what’s not): Meals, travel, client entertainment, home office, professional development. What’s explicitly excluded: spouse travel, first-class flights without prior approval, personal items.
Meal limits: A per-meal limit (e.g., $75 for a client dinner, $20 for a working lunch) prevents the $300 “client dinner” that was really a party for friends.
Approval requirements: Who approves before vs. after. For expenses under $100, submit receipt after the fact. For expenses over $500, get approval before spending.
Submission deadline: Require expense submission within 30 days of the expense. Expenses submitted more than 90 days after they were incurred may lose their accountable plan status for tax purposes.
Receipt requirements: Always required, regardless of amount, for any reimbursable expense.
A one-page policy that employees actually read and follow is worth more than a 20-page policy that no one looks at.
Frequently Asked Questions
What's the difference between an accountable plan and a non-accountable plan for expense reimbursements?
Under an accountable plan, employee expense reimbursements are tax-free to the employee and deductible to the employer — no payroll taxes, no W-2 reporting. Three requirements: business connection (the expense must be for business), substantiation (the employee provides receipts and documentation), and return of excess (if you advance more than the employee spends, they return the difference). Under a non-accountable plan — or no plan at all — reimbursements are treated as taxable compensation. The employee pays income tax on the reimbursement, and you pay payroll taxes as the employer. Most businesses intend to have an accountable plan but don’t meet all three requirements (often because substantiation requirements are loosely enforced). Formalizing your expense policy and substantiation process is how you protect the tax treatment.
We use corporate cards. Do we still need expense reports?
If you use corporate cards with real-time receipt capture (like Ramp or Brex), traditional expense reports become largely unnecessary — the card transaction provides the amount and date, and the receipt attachment (uploaded via mobile app) provides the substantiation. You still need documentation of business purpose for each transaction. Most corporate card platforms allow adding a note or memo to each transaction — this is your business purpose documentation. The IRS doesn’t require a specific form; it requires substantiation. A corporate card transaction with a receipt attached and a business purpose note satisfies the requirement. For meals, you also need the names of the attendees and the business relationship — a brief memo field entry handles this.
What happens if an employee submits personal expenses on a business expense report?
If you reimburse personal expenses submitted as business expenses (even unknowingly), that reimbursement is compensation to the employee — not a deductible business expense to you. If the personal expenses were deliberately misclassified, that’s expense fraud. The practical consequence: personal expenses that get deducted by the business can be disallowed in an IRS audit, creating additional tax, penalties, and interest. If the IRS determines the misclassification was intentional, the consequences are worse. Prevention: receipt review for any reimbursement, a clear written policy defining what’s reimbursable, and a spot-check process (review a random sample of expense reports each month). If you discover personal expenses that were already reimbursed, the cleanest fix is to have the employee repay the personal portion and document the correction.
Are business meals 50% or 100% deductible in 2026?
50% for most business meals. The 100% deduction for restaurant meals was a temporary COVID-era provision (2021–2022) that has expired. Under current law (as of 2026), business meals that meet the ordinary-and-necessary business purpose standard are 50% deductible. This includes: client meals with a documented business purpose, team meals during business meetings, travel meals while away from home for business. Entertainment expenses (tickets to sporting events, concerts, golf outings) are 0% deductible — the TCJA eliminated entertainment deductions entirely, and they have not been restored. The ‘directly related to business’ test that once allowed some entertainment deductions no longer applies. Meals eaten at entertainment events (a working dinner at a sports box) may be separately deductible at 50% if the meal is separately invoiced.
How far back can the IRS go to disallow business expense deductions for lack of documentation?
Generally 3 years from the return’s filing date (or due date, whichever is later) for a standard audit. This can extend to 6 years if the IRS believes income is substantially understated (omitting more than 25% of gross income). There’s no statute of limitations for fraud. In practice: if you’re audited for a recent year and can’t produce substantiation for expenses in that year, those deductions can be disallowed. The IRS auditor will ask for source documents — receipts, invoices, mileage logs, and records of business purpose. If you can’t produce them, even legitimate expenses may be disallowed under the strict substantiation rules for certain categories (meals, travel, vehicles). Best practice: keep business expense records for at least 7 years from the filing date of the return they appear on.