Your receipts aren’t enough: a Tax Court lesson for the self-employed.

A licensed real estate agent claimed big Schedule C deductions for travel, meals, and his car. The Tax Court threw out nearly all of them — and added a 20% penalty. The problem wasn’t that the expenses were fake. The problem was the records.

This one stings, because the taxpayer was probably telling the truth. A licensed real estate agent — working for two brokerages while running his own independent venture — claimed substantial Schedule C deductions for travel, meals, car and truck expenses, and a home office. The Tax Court acknowledged he likely did incur real business expenses. It disallowed nearly all of the travel and vehicle deductions anyway, and tacked on a 20% penalty.

Why “I really spent it” isn’t enough

Travel, meals, and vehicle expenses face some of the strictest substantiation rules in the tax code — Internal Revenue Code §274(d). For each expense you must document the amount, the date, the place, the business purpose, and the business relationship of the people involved. A credit card statement proves money changed hands; it doesn’t prove business purpose. A mileage log reconstructed months later isn’t contemporaneous. The court allowed just $711.60 of his travel and meal claims. The rest vanished.

The one deduction that survived — barely

His home office deduction lived, but only because the home office isn’t subject to §274(d)’s strict rules. That let the court use the Cohan rule — a nearly century-old doctrine from Cohan v. Commissioner that lets judges estimate expenses when it’s clear money was spent but exact records are missing. He had a floor plan, rent receipts, and a physical log for a 130-square-foot room used exclusively for business. Even so, the estimated deduction was far less than he claimed.

The penalty made it worse

The IRS assessed a 20% accuracy-related penalty under §6662(a), and the court sustained it. A $10,960 tax deficiency became $13,152 with the penalty — plus compounding interest. His “my fiduciary duty stopped me from sharing more records” defense was rejected. So was “my preparer did it” — he never gave the preparer complete information in the first place.

What good records actually look like

You don’t need an accounting department. You need a habit. A mileage app that logs trips automatically, a phone photo of every receipt with a one-line note (“lunch with client X, discussed Q3 bookkeeping”), and a separate business bank account so personal and business spending never mix. The court in this case specifically faulted the taxpayer for retroactive reconstruction — notes made the same day carry weight that memory doesn’t.

And keep everything for at least three years after you file — longer if you underreported income by more than 25%, which extends the IRS’s audit window to six years.

Alex Volkov, CPA is a New York-licensed CPA with over two decades in accounting, focused on resolving IRS tax problems — back taxes, liens, levies, garnishments, and audits — for individuals and businesses nationwide.