Expense Report Template

An expense report is a structured document that records business-related costs an employee or contractor paid out of pocket, submitted to their employer or client for reimbursement. At its core it answers four questions the IRS also cares about: Who spent the money, what was bought, when, and for what business purpose.

Businesses need expense reports for three reasons:

• Reimbursement. Employees expect to be paid back for legitimate costs. Without a formal record, amounts are easily disputed.
• Bookkeeping. Expense reports feed directly into accounts payable and general ledger entries, ensuring the right cost center is charged.
• Tax substantiation. The IRS requires written records to support deductions for travel, meals, lodging, and vehicle use under IRC §274(d). An accountable plan — where employees submit reports within a reasonable time (typically 60 days) and return excess advances — keeps reimbursements out of taxable wages entirely.

IRS Publication 463 ("Travel, Gift, and Car Expenses") spells out exactly what documentation is required: the amount, date, place, business purpose, and business relationship for each expense. A well-designed expense report captures all of this in one place.

For expenses subject to the strict substantiation rules of IRC §274(d) — which covers most business travel, lodging, meals, and vehicle costs — the IRS requires:

• Amount of each separate expenditure
• Date of the expense or use
• Place of travel or entertainment (city and name of establishment for meals)
• Business purpose (the benefit expected from the expense)
• Business relationship (for meals — names and titles of the people entertained)

For vehicle/mileage expenses, you must also record the business destination, starting odometer, ending odometer, and total miles driven for business vs. personal use.

Keep receipts, credit card statements, and the expense report itself for at least 3 yearsfrom the date you file (6 years if you underreport income by more than 25%). For assets with depreciation, keep records until the statute of limitations expires for the year in which you dispose of the asset.

Two related tools can help with ongoing tracking: Mileage Log Template for detailed vehicle records, and the Profit & Loss Template to see how reimbursable expenses affect your business financials. For travel-specific guidance, see our blog post on Business Travel Deductions 2026.