Section 274(d): The Strict Proof Rules for Travel, Gifts and Vehicles

If your audit letter lists car and truck expenses, travel or business gifts, the examiner is not going to ask "do you have receipts?" The examiner is going to ask whether you can prove four specific things for each expense. That is section 274(d), and it is one of the most reliable sources of audit adjustments in the Code.

What the statute covers

IRC 274(d) says no deduction or credit shall be allowed:

1. under section 162 or 212 for any traveling expense, including meals and lodging while away from home,
2. for any expense for gifts, or
3. with respect to any listed property, as defined in section 280F(d)(4),

unless you substantiate by adequate records or by sufficient evidence corroborating your own statement.

Listed property is where vehicles come in. If you deduct the business use of a car, depreciation on it, or other vehicle costs, assume 274(d) applies unless your vehicle falls in the statute's exception for qualified nonpersonal use vehicles.

The four elements

Section 274(d) requires you to substantiate:

• (A) the amount of the expense or other item,
• (B) the time and place of the travel, or the date and description of the gift,
• (C) the business purpose of the expense or other item, and
• (D) the business relationship to you of the person receiving the benefit.

The regulation breaks these down further by category (Treas. Reg. 1.274-5T(b)):

Category	What you must show
Travel away from home	Amount of each separate expenditure (meals and incidentals may be aggregated by reasonable category); dates of departure and return and days on business; destination by city or town; business reason for the travel
Gifts	Cost; date; description; business reason; occupation or other information about the recipient sufficient to show the business relationship
Listed property, such as a vehicle	Amount of each expenditure (cost, improvements, lease payments, repairs); amount of each business use and total use, measured in mileage for vehicles; date of the expenditure or use; business purpose

What an "adequate record" is

The regulation says adequate records means an account book, diary, log, statement of expense, trip sheet or similar record, plus documentary evidence, which together establish each element (Treas. Reg. 1.274-5T(c)(2)(i)).

Timing matters. The record must be made at or near the time of the expense or use, meaning when you have full present knowledge of the details. The regulation gives an example: a log kept weekly that accounts for the week's use counts as a record made at or near the time (Treas. Reg. 1.274-5T(c)(2)(ii)(A)).

Two other points people miss:

• A contemporaneous log is not strictly required. The regulation says so. But a record made at or near the time has "a high degree of credibility" that a later statement lacks, and evidence prepared afterward must have a high degree of probative value to match it (Treas. Reg. 1.274-5T(c)(1)).
• Electronic logs count. A record of business use of listed property kept in a computer or with a logging program is an adequate record (Treas. Reg. 1.274-5T(c)(2)(ii)(C)). Mileage apps qualify if they capture the elements.

Business purpose usually needs to be written down. But where the business purpose is evident from the surrounding facts, the regulation says a written explanation is not required, using the example of a salesman calling on customers on an established sales route.

Record each expense separately

The regulation generally treats each separate payment as a separate expenditure, and the log must track each one rather than lumping amounts together. Lodging and air or rail travel must be recorded as separate items. Breakfast, lunch and dinner may be aggregated at your option, a tip may be grouped with the expense it relates to, and vehicle costs such as gas and repairs may be aggregated (Treas. Reg. 1.274-5T(c)(6)(i)(B)).

Confidential details get some protection. If information such as the place, business purpose or business relationship is confidential, it need not be written in the log itself, as long as it was recorded at or near the time and is available elsewhere to substantiate the element (Treas. Reg. 1.274-5T(c)(2)(ii)(D)).

If you do not have adequate records

All is not lost, but the path narrows.

Substantial compliance. If you have substantially complied with the adequate records requirement but not fully substantiated an element, you may be allowed to establish that element with other evidence the IRS deems adequate (Treas. Reg. 1.274-5T(c)(2)(v)).

Your statement plus corroboration. Otherwise, you must establish each element by your own detailed statement plus corroborating evidence. For amount, time, place, date or description, the corroboration must be direct evidence, such as written statements or testimony of witnesses, or documentary evidence. For business purpose or business relationship, it may be circumstantial (Treas. Reg. 1.274-5T(c)(3)(i)).

Sampling for listed property. You may keep an adequate record for part of the year and use it for the whole year if you can show the sampled period is representative. The regulation's examples approve a log kept for the first three months, or the first week of each month, where the business pattern stayed the same, and reject one built on an unrepresentative week (Treas. Reg. 1.274-5T(c)(3)(ii)).

Inherent impossibility. If the nature of the situation made it impossible to get evidence that meets either standard, evidence with the highest degree of probative value possible under the circumstances can satisfy the rule (Treas. Reg. 1.274-5T(c)(4)).

Casualty. If you lost the records through circumstances beyond your control, such as fire, flood or earthquake, you have a right to substantiate by reasonable reconstruction (Treas. Reg. 1.274-5T(c)(5)).

Why estimates do not work here

For most expenses, courts have long allowed a reasonable estimate when the expense clearly happened but the amount is uncertain. That is the rule from Cohan v. Commissioner. The 274(d) regulation states that the section supersedes that doctrine and that no deduction is allowed on the basis of approximations or unsupported testimony (Treas. Reg. 1.274-5T(a)).

So a statement like "I drove about 15,000 business miles" with no log, no calendar and no corroboration will lose. A reconstructed log built from a calendar, client invoices, delivery records and service receipts showing odometer readings has a fighting chance, especially if the regulation's corroboration rules are met.

The vehicle audit, step by step

Vehicle expenses are the most common 274(d) issue I see in individual audits. Prepare like this:

1. Total miles. Odometer readings at the start and end of the year. Service invoices and inspection records often show them.
2. Business miles. Your log, app data, or a reconstruction tied to dated appointments, invoices and deliveries.
3. Purpose for each trip. Client name, job site, supplier. A route-based business can rely on the pattern.
4. Expenses. If you deduct actual costs, the regulation allows gas and repairs to be aggregated and prorated by business use, but you still need date and amount (Treas. Reg. 1.274-5T(c)(6)(i)(B)).
5. Commuting. Be ready to explain why a trip was not commuting. Examiners will ask.

Gifts

Gift deductions also face a dollar cap in section 274(b), which limits the deduction for business gifts to any individual during the year. Substantiate the cost, date, description, purpose and the recipient's business relationship, and expect the cap to apply on top of the substantiation rules.

The practical lesson

Section 274(d) is a records rule disguised as a deduction rule. You do not lose these deductions because they were improper. You lose them because the proof was not kept the way the regulation demands. If you are in an audit now, gather every contemporaneous document that touches each element before you meet the examiner. If you are not, start the log today. It is the cheapest audit defense there is. For the general recordkeeping duty that sits underneath all of this, see IRC 6001 recordkeeping.