What Is Accountable Plan?
An Accountable Plan is a set of rules, established by the Internal Revenue Service (IRS), that governs how employers can reimburse their employees for business expenses without those reimbursements being subject to income or payroll taxes. To qualify as an Accountable Plan, the reimbursement arrangement must satisfy three critical requirements, often referred to as the "three rules" outlined in IRS Publication 505, "Tax Withholding and Estimated Tax," and further detailed in IRS Publication 463, "Travel, Gift, and Car Expenses."
First, the expenses must have a business connection. This means the costs must be ordinary and necessary for the business — directly related to the company's trade or business activities. Second, employees must adequately substantiate these expenses. They need to provide receipts, itineraries, and other records detailing the amount, time, place, and business purpose of the expense. This substantiation must occur within a "reasonable period." Third, any excess reimbursements must be returned to the employer within a reasonable period. If an employee receives an advance that is more than their justified expenses, they must pay back the difference. Meeting all these requirements means the reimbursements are excluded from the employee's gross income and from the business's wage base for payroll taxes.