Heightened IRS Substantiation Rules for Business Expenses

The IRS substantiation rules for business expenses set a higher bar for travel, meals, business gifts, and listed property like vehicles than for ordinary business costs. Under Internal Revenue Code Section 274(d), you have to prove four things about each expense with records made at or near the time it happened: the amount, the time and place, the business purpose, and the business relationship of anyone else involved.¹ Miss any one of them and the deduction is disallowed in full, even if the IRS agrees you actually spent the money.

Which Expenses Are Covered

Section 274(d) applies to three categories the IRS treats as especially prone to personal use: travel away from your tax home (including meals and lodging on the trip), business gifts, and listed property.¹

Business gifts are still deductible, but only up to $25 per recipient per year, a cap Congress set decades ago and has never indexed to inflation. A $40 gift still needs full documentation; only $25 comes off your taxes.

Listed property, defined in Section 280F, includes passenger automobiles, other transportation property (motorcycles, pickup trucks, aircraft), and property generally used for entertainment or recreation.² Two items people often assume are on the list are not: the Tax Cuts and Jobs Act removed computers and peripheral equipment, and cell phones were also removed. Employer-provided phones now qualify as a working condition fringe benefit for business use and a de minimis fringe for personal use, provided the employer has a noncompensatory business reason for the phone.³ Vehicles used almost entirely in a transportation-for-hire business (taxi, trucking, and similar operations) also fall outside the heightened listed-property rules.

The Four Elements Your Records Must Show

For every covered expense, your records need to establish:

The exact amount. If the receipt reads $47.32, so should your log. Rounded estimates don’t hold up.
The time and place: the specific date and location. For travel, the city and destination. For a gift, the date given and a description of the item.
The business purpose: a clear explanation of how the expense benefits the business. “Client lunch” is thin. “Discussed Q3 contract terms with [client name]” holds up.
The business relationship: name, title, and professional connection of the person receiving the meal, gift, or benefit of the travel.¹

Timing matters as much as content. IRS regulations require the information to be recorded while the details are still fresh, and courts have consistently treated contemporaneous entries as more credible than reconstructions done during tax season. A daily expense diary or a digital tracking app with a field for each of the four elements is the most defensible approach.

This is where Section 274 diverges from ordinary deductions. For a typical business cost missing a receipt, a court might allow a reasonable estimate under the Cohan rule. That fallback does not exist here. No records, no deduction.¹

Receipts, the $75 Rule, and Electronic Storage

The four elements aren’t the whole story. You also need documentary evidence such as receipts, invoices, or bills. The IRS requires paper (or digital) documentation for every lodging expense, regardless of amount. For other covered expenses, you need a receipt any time the cost is $75 or more. Below that threshold, a contemporaneous log entry covering the four elements can stand alone.⁴ Transportation expenses where a receipt isn’t readily available, like a bridge toll, are also excused from the receipt requirement.

Credit card statements and canceled checks can support your records but usually can’t carry them alone. A card charge reading “$127 — Steakhouse” says nothing about who attended or what was discussed. The itemized receipt has to show what was bought, and your notes have to supply the business context.

Digital records are fully acceptable. Revenue Procedure 97-22 lets you use electronic storage, including scanned or photographed receipts and cloud bookkeeping, as long as the system is accurate and reliable.⁵ The system must be able to produce a legible hardcopy of any stored record, prevent unauthorized changes, keep an indexing structure that works like an organized filing cabinet, and maintain an audit trail back to your general ledger. A phone app that dumps photos into a camera roll won’t meet those standards.

Meals After the End of Entertainment Deductions

The Tax Cuts and Jobs Act permanently eliminated the deduction for entertainment, amusement, and recreation expenses, including club dues.¹ Tickets to a game, a round of golf with a client, and similar activities are fully nondeductible, even if business is discussed throughout.

Business meals remain 50% deductible when they meet specific conditions.⁶ You or an employee must be present, the food and drink cannot be lavish or extravagant, and the meal must involve a current or potential business contact such as a client, customer, or consultant.⁷ The IRS hasn’t set a dollar cap on “lavish or extravagant”; the standard is reasonableness under the circumstances. A $200 dinner in Manhattan may pass. The same tab at a roadside diner probably won’t.

When food and entertainment happen together, the meal-versus-entertainment split matters. Take a client to a basketball game, buy food at the arena, and the food is deductible at 50% only if it’s purchased separately from the tickets and shown as a distinct item on the receipt. Food bundled into an entertainment package loses its deductibility along with the entertainment.

Vehicles and the Form 4562 Question

For passenger automobiles weighing 6,000 pounds or less, Section 280F imposes annual depreciation caps that limit the write-off regardless of the vehicle’s price.⁸ Beyond the numbers, listed property comes with its own reporting step. You have to complete Part V of Form 4562 to report the business-use percentage, describe the vehicle’s availability for personal use, and confirm whether you have written evidence supporting the deduction. Form 4562 is also required whenever you claim depreciation on listed property, regardless of when the asset was placed in service.⁹ Answering “no” to the written-evidence question doesn’t guarantee an audit, but it does raise a flag.

Per Diem as a Substantiation Shortcut

Instead of tracking every meal and lodging receipt on a trip, you can use IRS per diem rates. Under the high-low method for travel on or after October 1, 2025, the rate is $319 per day for high-cost localities and $225 per day elsewhere within the continental United States. The meal portion is $86 of the $319 high-cost rate and $74 of the $225 standard rate. The incidental-expenses-only rate is $5 per day for any location.¹⁰

Per diem simplifies receipts, not everything else. You still need records of the dates, destinations, business purpose, and business relationships for each trip. The daily rate just replaces the individual meal and lodging receipts.

Spouse and Companion Travel

Bringing a spouse or family member on a business trip is common, and the tax treatment is strict. Under Section 274(m)(3), travel costs for a spouse, dependent, or other companion aren’t deductible unless three conditions are all met: the companion is an employee of the business, the companion’s travel has a genuine business purpose, and the expenses would be independently deductible by the companion.¹¹ Attending the conference dinner doesn’t count. The spouse must have a real work role.

One workaround exists: the employer can treat the companion’s travel as additional compensation to the employee. The employer deducts it as wages, but the employee reports it as income and pays tax on it. The math rarely favors this for small amounts, but it’s available.¹¹

Accountable Plans for Employee Reimbursements

Employees generally cannot deduct unreimbursed business expenses on their personal tax returns under current law. That makes the employer’s reimbursement arrangement the whole ballgame for staff who spend money on the company’s behalf.

An accountable plan keeps reimbursements tax-free. Under Treasury Regulation 1.62-2, the arrangement qualifies as accountable if the employee establishes the business connection for each expense, substantiates it to the employer within a reasonable period, and returns any excess reimbursement within a reasonable period.¹² Payments under an accountable plan are excluded from the employee’s income, don’t appear on the W-2, and aren’t subject to payroll taxes.

Fail any of the three requirements and the whole arrangement becomes a nonaccountable plan. Every dollar reimbursed then has to be reported as wages on the W-2, with income tax withholding, FICA, and FUTA on top.¹³ It’s a large avoidable cost, and the fix is simply requiring employees to submit substantiation on time and return unused advances.

How Long to Keep the Records

The IRS generally has three years from the date you file (or the return’s due date, whichever is later) to assess additional tax.¹⁴ That’s the minimum retention period. Three situations extend it:

If you omit more than 25% of the gross income shown on your return, the assessment window extends to six years.¹⁵
For fraudulent returns or a failure to file at all, there is no time limit.¹⁴
For depreciable property, including vehicles, keep records until the statute of limitations runs on the year you dispose of the asset. That’s the entire time you own it plus three years, or longer if another extension applies.¹⁶

The asset rule catches people. Buy a work truck in 2026 and sell it in 2033, and you need the purchase records, mileage logs, and depreciation schedules through at least 2036. Lose them mid-stream and you may have trouble not just with each year’s deductions but also with the gain-or-loss calculation on the sale.

What Happens If Your Records Fall Short

The first consequence is the deduction being disallowed and the resulting tax coming due. The damage typically doesn’t stop there.

An accuracy-related penalty of 20% applies to any underpayment caused by negligence or a substantial understatement of income.¹⁷ Disallow $10,000 in deductions for someone in the 24% bracket and the additional tax is $2,400, with another $480 in penalty on top. Where fraud is involved, the penalty rises to 75% of the underpayment attributable to the fraudulent portion.¹⁸

Interest accrues on both the additional tax and the penalty. For 2026 the IRS charges 7% per year on individual underpayments, compounded daily.¹⁹ Large corporate underpayments (over $100,000 for C-corporations) get a higher rate calculated as the federal short-term rate plus five percentage points.²⁰ Interest runs from the original due date of the return, not the date the IRS raises the issue, so a deduction disallowed two years after filing already carries two years of compounded interest before the first notice arrives.

Back tax, penalty, and interest together can easily wipe out the tax benefit the deduction was meant to provide, and then some. Keeping the four elements from the start, saving receipts at $75 and above, and storing everything in a system that can reproduce clean copies costs almost nothing by comparison.

1
Office of the Law Revision Counsel. 26 USC 274 – Disallowance of Certain Entertainment, Etc., Expenses
2
Office of the Law Revision Counsel. 26 USC 280F – Limitation on Depreciation for Luxury Automobiles
3
Internal Revenue Service. Publication 15-B, Employer’s Tax Guide to Fringe Benefits
4
Internal Revenue Service. Publication 463 – Travel, Gift, and Car Expenses
5
Internal Revenue Service. Revenue Procedure 97-22
6
Internal Revenue Service. Tax Cuts and Jobs Act – Businesses
7
Internal Revenue Service. Meals and Entertainment Expenses Under Section 274 (TD 9925)
8
Internal Revenue Service. Instructions for Form 4562 (2025)
9
Internal Revenue Service. 2025 Instructions for Schedule C (Form 1040)
10
Internal Revenue Service. Notice 2025-54: 2025-2026 Special Per Diem Rates
11
Internal Revenue Service. Spousal Travel
12
Internal Revenue Service. Nonresident Aliens and the Accountable Plan Rules
13
eCFR. 26 CFR 1.62-2 – Reimbursements and Other Expense Allowance Arrangements
14
Internal Revenue Service. Time IRS Can Assess Tax
15
Office of the Law Revision Counsel. 26 USC 6501 – Limitations on Assessment and Collection
16
Internal Revenue Service. Publication 583 – Starting a Business and Keeping Records
17
Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments
18
Office of the Law Revision Counsel. 26 USC 6663 – Imposition of Fraud Penalty
19
Internal Revenue Service. Interest Rates Remain the Same for the First Quarter of 2026
20
Internal Revenue Service. Quarterly Interest Rates