If you own a business or manage employees, an accountable plan is critical. Under IRC 62(a)(2)(A), employee expense reimbursements under an accountable plan are tax-free to the employee and deductible to the employer. Without an accountable plan, reimbursements are taxable wages.
What Is an Accountable Plan?
An accountable plan is a written policy reimbursing employee business expenses under three conditions: (1) Business connection—expenses are legitimate business (not personal); (2) Substantiation—employees document expenses with receipts and logs; (3) Return of excess—employees return over-reimbursements.
Business Connection
Expenses must relate directly to business operations: vehicle mileage for client meetings, meals during business events, professional development, equipment for remote work, travel, and client entertainment. You cannot reimburse personal expenses like gym memberships.
Substantiation Requirement
This is where most accountable plans fail. Under IRC 274(d), meal and entertainment expenses over $75 require written substantiation. For vehicle mileage, employees need a contemporaneous mileage log. Without this documentation, the IRS disallows the deduction.
Return of Excess Requirement
If an employee is reimbursed $5,000 but only incurred $4,200 in expenses, they must return the $800 excess. Without this requirement, the plan isn't accountable and the entire reimbursement becomes taxable wages.
Implementation Steps
Step 1: Write a plan document including reimbursable expenses, substantiation requirements, submission timelines, and return-of-excess procedures. Step 2: Distribute to employees and have them acknowledge receipt. Step 3: Enforce consistently—don't waive documentation for some employees.
Vehicle Reimbursement
Employees reimburse either the IRS standard mileage rate ($0.67/mile, 2024) or actual expenses. Employees must maintain a contemporaneous mileage log. Example: 12,000 business miles at $0.67/mile = $8,040 tax-free reimbursement, saving roughly $2,400 in payroll taxes.
Meal and Entertainment Reimbursement
The employee submits a receipt showing date, amount, location, attendee names, and business purpose. The employer reimburses the full cost (tax-free to employee) but deducts 50% (or 100% for certain meals).
S-Corp Owner Synergy
For S-corp owners, accountable plans are especially valuable. An owner receiving $100,000 W-2 salary plus $50,000 in business reimbursements under an accountable plan avoids self-employment tax on the reimbursement portion, saving roughly $7,500.
Documentation
Keep all accountable plan documentation: the written policy, employee acknowledgments, expense reports, receipts, mileage logs, and bank records. Without these, the IRS reclassifies reimbursements as taxable wages and assesses payroll taxes plus penalties.