What Is an Expense Report? Example, Receipts and Rules

An expense report is a form an employee fills in to be paid back for business costs they covered themselves. It lists each purchase with its date, amount and purpose, plus any business miles driven in their own vehicle, with the receipts attached. A manager approves it and the business repays the total.

The report also does a tax job. Repayments backed by one are not wages, so they are not taxed; the same money handed over without a report can be. Here is a worked example, what belongs on the form, and the deadlines that keep the repayment tax-free.

An expense report, line by line

This is one week for an invented refrigeration technician in Albuquerque. They drive their own truck to a two-day job in Santa Fe, stay one night, buy a replacement part at a supply house, and fill the company van on the company card. The company gave them a small cash advance before the trip.

Expense report EXP-0419 for an invented refrigeration technician in Albuquerque, Oct 19, 2026 to Oct 23, 2026. Calculated by our expense report engine.
Date	Category	Description	Paid by	Amount	Receipt needed?
Oct 19, 2026	Equipment	Condenser fan motor for a restaurant walk-in	Technician	$164.38	Yes
Oct 20, 2026	Lodging	Motel, 1 night in Santa Fe	Technician	$61.12	Yes
Oct 20, 2026	Meals	Dinner while away overnight	Technician	$17.46	No
Oct 21, 2026	Parking and tolls	Parking at a hospital loading dock	Technician	$8.00	No
Oct 22, 2026	Fuel	Fuel for the company van	Company card	$92.07	Card statement
Oct 20, 2026	Mileage	Albuquerque shop to Santa Fe service call, 64 miles at 76 cents	Technician	$48.64	Mileage log
Oct 21, 2026	Mileage	Santa Fe back to Albuquerque via a Bernalillo call, 71 miles at 76 cents	Technician	$53.96	Mileage log
Total spent, including the company card				$445.63
To reimburse (technician's spending and mileage)				$353.56
Less the cash advance				-$150.00
Owed to the technician				$203.56

The fuel line shows why a report lists everything, including what the company already paid: the approver sees the whole week in one place, but only the technician’s own spending and miles are paid back. The cash advance comes off the end, leaving the balance the company still owes.

Mileage is the one line with no receipt. It is worked out per mile instead, here at the IRS business rate of that applies to trips from July 1. Our guide to the 2026 IRS mileage rate has both rates for the year and the dates they apply.

Only what the technician paid personally is reimbursed. The fuel on the company card is listed on the report but not paid again.

What goes on an expense report

Who and why. The employee, the approver, the dates covered and the business purpose of the trip or project.
Each expense. Date, merchant, category, amount and what it was for. The IRS describes adequate evidence as showing the amount, date, place and essential character of the expense.
Who paid. The employee personally or a company card. Company-card lines are listed for the record but not repaid.
Mileage. Each trip’s date, route or purpose and miles, rather than one monthly total.
Receipts. Attached and numbered to match the lines they support.
Advance and balance. Any cash advance, and the final amount owed in either direction.

Which expenses need a receipt

For tax purposes, the IRS wants a receipt or similar evidence for any lodging, whatever it costs, and for any other expense of $75 or more. Below that, the written entry on the report is enough. That is why the cheap motel night needs its receipt and the dinner does not.

Many employers ask for every receipt anyway, and they are free to. The IRS threshold is the minimum for tax records, not a limit on company policy, so check your own expense policy before throwing small receipts away.

Deadlines that keep the repayment tax-free

An expense report is the paperwork behind what the IRS calls an accountable plan. Payments under one are not wages, so no income tax, Social Security or Medicare. The employee has to spend the money on the business, account for it within a reasonable time, and give back any advance they did not use.

These are the periods the IRS treats as reasonable, applied to the Albuquerque report:

The IRS safe-harbor deadlines for an accountable plan, applied to the Albuquerque report. Expenses start October 19, 2026.
Step	Rule	For this report
Advance paid	Within 30 days of the spending	October 16, 2026: $150 in cash, inside the window
Report and receipts in	Within 60 days after the expense	By December 18, 2026 for the earliest line
Unspent advance returned	Within 120 days after the expense	By February 16, 2027, if the advance had been larger than the spending
Miss these	The late or unsupported amount is treated as wages	Taxed in the first payroll after the deadline passes

Miss them and the unsupported part of the payment becomes taxable pay in the first payroll after the deadline. A flat monthly allowance paid with no report at all goes the same way: under what the IRS calls a nonaccountable plan, the whole amount is wages.

Expense report, invoice or receipt?

Expense report, invoice and receipt: three documents that are easy to confuse.
	Expense report	Invoice	Receipt
Written by	The employee	The seller	The seller
Sent to	The employer	The customer	The customer
Asks for	Repayment of business costs the employee covered	Payment for goods or work	Nothing; it confirms a payment
Backed by	Receipts and a mileage log	The order or contract	The payment itself
Tax effect for the employee	Not wages when paid under an accountable plan	Not applicable	Not applicable

The difference is direction. An invoice and a receipt pass between a business and its customer; an expense report stays inside the company, between an employee and their employer. A contractor who covers costs for a client is not an employee, so they bill those costs on an invoice instead.

How long to keep expense reports

Keep approved reports and their receipts with the business’s tax records, generally for 3 years after filing the return they support and longer in the cases the IRS lists. Our expense report template builds the same report in your browser, applies the mileage rate by trip date, and exports to Excel.

Sources: IRS, Publication 463, chapter 5, and Publication 15 (2026), accountable and nonaccountable plans; IRS, How long should I keep records? Mileage at the IRS standard rate for each trip date. Checked October 28, 2026.

Use only for real payments you made or received. Creating documents with false information may be illegal. Read our acceptable use policy.

Frequently asked questions

Who fills out an expense report?

The employee who spent the money, usually after each trip or once a month. A manager approves it, then the business repays it either as a separate payment or as a separately shown amount alongside a paycheck.

When should I submit an expense report?

As soon as the trip or month ends. Your employer’s policy sets the deadline, and under the IRS safe harbor the report should be in within 60 days of the expense for the repayment to stay tax-free.

Do self-employed people need expense reports?

Not to repay themselves, but they need the same records. Receipts and a mileage log support the business deductions on their own return, and a contractor passing costs on to a client puts them on an invoice.