Accountable Plan Expense Substantiation Checklist

This checklist is for US employee business-expense records under the accountable-plan discussion in IRS Publication 463, Chapter 6. It does not determine whether an expense is deductible or reimbursable. Publication 463 describes three conditions: a business connection, adequate accounting within a reasonable period, and return of excess reimbursement within a reasonable period. Employer policy may be narrower; approval does not settle federal tax deductibility.

Establish the business connection first

For each item, identify the employee, date, amount, vendor or destination, and work activity supported. State a concrete purpose, such as attending a named customer meeting; “business” alone may not explain the connection. Publication 463 defines the connection as an expense paid or incurred while performing services as an employee and connected with the employer’s business. Flag mixed personal and business charges for clarification.

Capture evidence close to the event

Chapter 6, “Adequate Accounting,” describes a statement, diary, or similar record entered at or near the expense, together with evidence such as receipts. Chapter 5, Table 5-1, organizes proof by amount, time, place or description, and business purpose. For travel, record dates, destination, business days, and purpose; for transportation, record cost, date, destination, and purpose. A form can organize facts but cannot replace missing evidence with assumptions.

1. Record the transaction and business purpose while details are fresh.
2. Attach the receipt or other supporting document required for the expense.
3. For travel, include trip dates and location; separate non-entertainment meals from other categories.
4. Compare submitted amounts with advances, allowances, and prior payments for the same item.
5. Route exceptions or incomplete records to the designated reviewer instead of silently approving them.

Worked example: a two-day customer visit

An employee travels for a scheduled customer visit and submits lodging, rail fare, taxi, and meals. The file identifies the meeting and dates, attaches lodging and fare evidence, records the taxi destination and purpose, separates meals, and shows the advance. If a receipt is missing, request an explanation and available evidence; do not invent an amount or assume the gap is acceptable for tax purposes. The employer decides reimbursement under policy, separately from tax classification.

Handle gaps, excesses, and timing carefully

If an amount lacks support, mark precisely which element is missing and ask for a correction. Publication 463 says an accountable plan requires excess amounts to be returned within a reasonable period; its examples of reasonable timing include accounting within 60 days and returning excess within 120 days after the expense, subject to the publication’s facts-and-circumstances framework. Do not turn those examples into a company deadline without checking the plan and applicable guidance. If an employee cannot substantiate all of an advance, route the unsupported portion for resolution. The publication explains that amounts not adequately accounted for or excess amounts not timely returned may be treated as paid under a nonaccountable plan.

Close the record with an auditable outcome

Preserve evidence, reviewer questions, employee response, final amount, and any repayment or unresolved balance together. Follow the employer’s retention policy and applicable requirements; Publication 463 Chapter 5 discusses tax record retention but this checklist sets no universal period. Employer approval does not decide the employee’s tax position.

• Confirm business connection and a specific purpose.
• Check amount, date, place, description, and supporting evidence.
• Reconcile the request to all advances and reimbursements.
• Record missing-evidence follow-up and excess return separately.
• Document who decided the employer-policy outcome and when.