Section 274(d) substantiation requirements are the strictest documentation rules in the tax code: to keep a deduction for travel, business gifts, or listed property, you have to prove four things about each expense — the amount, the time and place, the business purpose, and the business relationship of the person who benefited. Miss any one of those elements and the IRS disallows the whole deduction. There’s no partial credit, and the usual rule that lets taxpayers estimate costs when records are thin does not apply here.1Office of the Law Revision Counsel. 26 USC 274 – Disallowance of Certain Entertainment, Etc., Expenses
Which Expenses Fall Under the Rule
Three categories trigger strict substantiation. The first is travel away from home on business, including transportation, lodging, and meals. Business meals stay deductible when they aren’t lavish, but only at 50% of the cost; the temporary 100% deduction for restaurant meals expired at the end of 2022, so the standard 50% cap applies for 2026.2Internal Revenue Service. Treasury Decision 9925 – Meals and Entertainment Expenses Under Section 274 Workers subject to Department of Transportation hours-of-service limits get 80% on meals eaten during duty periods.
The second is business gifts, capped at $25 per recipient per year. That figure is written into the statute and has never been indexed for inflation. Branded items costing $4 or less and promotional display materials used at the recipient’s business don’t count toward the cap.1Office of the Law Revision Counsel. 26 USC 274 – Disallowance of Certain Entertainment, Etc., Expenses
The third is listed property, meaning assets with high potential for personal use: passenger automobiles, other vehicles used for transportation, and property typically used for entertainment or recreation.3Office of the Law Revision Counsel. 26 USC 280F – Limitation on Depreciation for Luxury Automobiles For assets placed in service after December 31, 2017, computers and peripheral equipment are no longer listed property.4Internal Revenue Service. Tax Cuts and Jobs Act (TCJA) Depreciation Provisions To claim depreciation or a Section 179 deduction on listed property, more than 50% of total use has to be for qualified business purposes.5Internal Revenue Service. Publication 946 – How To Depreciate Property
One boundary worth noting: entertainment. The Tax Cuts and Jobs Act eliminated the deduction for most entertainment, amusement, and recreation expenses entirely. Taking a client to a ball game or a round of golf is not deductible now, no matter how carefully you document it.6Internal Revenue Service. Tax Cuts and Jobs Act – A Comparison for Businesses
The Four Elements You Have to Prove
Section 274(d) is explicit about what each record must contain. Missing any single element gives the IRS grounds to deny the deduction in full.
Amount. The exact dollar figure of each expense, including tax and tip. Rounding to the nearest ten or writing down “about $60” won’t hold up.
Time and place. For travel, when and where. For gifts, the date and a description of the item. “Dinner at Gibson’s Steakhouse, October 14” survives review; “dinner in Chicago” is weaker.
Business purpose. The commercial benefit you expected. “Met with potential distributor to discuss Q4 wholesale pricing” is specific enough. “Business dinner” is not.
Business relationship. Who received the benefit and how they connect to your business — client, vendor, prospective customer, employee. For gifts, this element is what shows the recipient wasn’t a friend or family member getting a personal present on the company’s dime.
What Counts as Adequate Records
The regulations split “adequate records” into two pieces that work together: a written log and documentary evidence.7eCFR. 26 CFR 1.274-5A – Substantiation Requirements
The written log can be an account book, a diary, a spreadsheet, or an expense app, but it has to be prepared “at or near the time” of the expense. The regulation reads that phrase strictly: you should still have clear firsthand memory of every detail when you make the entry. Updating a log weekly is fine. Reconstructing three months of expenses from memory in April is not. For a vehicle or other listed property, the log needs to track each business use — the date, mileage, destination, and reason for the trip.
Documentary evidence means receipts, paid invoices, or similar records that independently confirm what you spent. Two rules control when receipts are required:8Internal Revenue Service. Publication 463 – Travel, Gift, and Car Expenses
- Lodging always requires a receipt, regardless of amount.
- Every other covered expense requires a receipt at $75 or more. Below that, the log entry alone is enough, though keeping the receipt anyway costs nothing.
A receipt needs to show the amount, date, place, and general nature of what you paid for. Hotel receipts should include the hotel name, location, dates of stay, and itemized charges. Restaurant receipts should show the restaurant name, date, amount, and number of people served. Canceled checks and credit card statements confirm payment happened but don’t establish business purpose, so they supplement the log rather than replace it.
Digital copies are acceptable. The IRS has long permitted electronic storage as long as images are legible, indexed for retrieval, and protected against unauthorized alteration.9Internal Revenue Service. Revenue Procedure 97-22 Photographing a receipt with your phone the moment you get it is one of the most reliable habits you can build. Paper thermal receipts fade; a backed-up digital image doesn’t.
Simplified Methods That Still Satisfy the Rule
Tracking the actual cost of every hotel night and every meal on the road is tedious, and the IRS offers two alternatives that satisfy Section 274(d) without individual receipts for lodging and meals. Dates, destinations, and business purpose still have to be documented.
The high-low per diem method uses a flat daily rate instead of actual meal and lodging costs. For travel on or after October 1, 2025, the rates are $319 per day for high-cost locations and $225 per day everywhere else in the continental United States. Of those amounts, $86 (high-cost) and $74 (low-cost) are treated as the meal portion, which remains subject to the 50% cap.10Internal Revenue Service. 2025-2026 Special Per Diem Rates (Notice 2025-54)
For vehicles, the standard mileage rate for 2026 is 72.5 cents per mile, covering cars, vans, pickups, and panel trucks, including electric and hybrid vehicles.11Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile Using the standard rate eliminates the need to track gas, insurance, and depreciation separately. It does not eliminate the mileage log. You still need to record the date, destination, business purpose, and either odometer readings or trip distance for each use.
What Happens If Records Are Missing
The Cohan Rule, a longstanding court principle that lets taxpayers estimate deductible expenses when records are incomplete, is explicitly overridden by Section 274(d). The statute’s “shall not be allowed… unless the taxpayer substantiates” language means what it says. Even if the IRS accepts that you probably took the trip and probably spent the money, the deduction is gone without specific documentation. This is where Section 274(d) diverges sharply from the rest of the tax code, and it catches people off guard every audit season.
One narrow exception exists. When the failure to produce records results from circumstances beyond your control — fire, flood, earthquake, or similar casualty — the Treasury regulations let you substantiate through reasonable reconstruction.7eCFR. 26 CFR 1.274-5A – Substantiation Requirements That means assembling bank statements, credit card records, duplicate receipts from vendors, calendar entries, and any other evidence that can rebuild the four required elements. The IRS expects a genuine effort, not a rough guess. Losing records to ordinary carelessness gets no such lifeline.
The most common penalty is straightforward: the deduction disappears, taxable income rises, and you owe the difference plus interest. On top of that, the IRS can impose a 20% accuracy-related penalty on the resulting underpayment if it finds negligence or disregard of the rules.12Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments Negligence under the statute includes any failure to make a reasonable attempt to comply — claiming deductions you can’t support fits that description. For a business owner who deducted $30,000 in travel and vehicle costs without adequate records, the penalty alone could exceed $1,500 before interest, and self-employment tax recalculates upward once the deductions shrink.
How Long to Keep the Records
Filing the return doesn’t end your documentation burden. You have to hold onto substantiation until the IRS can no longer audit the year. The general period is three years from the date you filed.13Internal Revenue Service. How Long Should I Keep Records If you underreported income by more than 25%, the window extends to six years. If you never filed at all, there’s no expiration.
Listed property stretches the retention period further. Since depreciation on a car can span five or six years, records establishing business-use percentage need to be kept until the statute of limitations runs out for the year you dispose of the vehicle or stop claiming depreciation. That can easily mean holding mileage logs for a decade.
Whether records live on paper or in the cloud, the IRS requires that the system produce legible, complete copies on demand. Electronic storage must include reasonable controls against unauthorized changes, an indexing system comparable to a well-organized filing cabinet, and an audit trail linking records back to your general ledger.9Internal Revenue Service. Revenue Procedure 97-22 A cloud-based expense app with search and backup meets those standards. A shoebox of faded thermal receipts does not.
The 2026 Return of Unreimbursed Employee Expenses
From 2018 through 2025, employees couldn’t deduct unreimbursed business expenses at all — the Tax Cuts and Jobs Act suspended that itemized deduction. The suspension expires on December 31, 2025.14Congress.gov. Expiring Provisions in the Tax Cuts and Jobs Act Starting with the 2026 tax year, employees who pay business costs out of pocket and aren’t fully reimbursed can again deduct those expenses as miscellaneous itemized deductions, to the extent they exceed 2% of adjusted gross income.
The substantiation standard for those employee deductions is the same one covered above. If you’re an employee planning to claim unreimbursed travel, gift, or listed-property costs on a 2026 return, you need to meet the full Section 274(d) documentation requirements. The deduction is back; the IRS’s expectations haven’t softened. If you stopped keeping mileage logs and receipts after 2017, restart now — the records for a 2026 deduction have to be contemporaneous with the expense, which means the work begins the first day of the tax year, not at filing time.