6 Travel and Per Diem Rules That Keep Owner Trips Deductible

Sam's List Editorial | 2026-08-07

6 Travel and Per Diem Rules That Keep Owner Trips Deductible Per diem rules for business travel do one job. They substantiate the amount you spent so you do not have to keep a receipt for every sandwich. They never substantiate the purpose . That distinction is where most owner travel deductions fall apart, and it is the reason a per diem log does not save a trip that was really a vacation with a client dinner attached. Here are six rules that decide whether a trip holds up, starting with the numbers that apply right now. 1. The Per Diem Rules Start With Knowing Your Rate For federal fiscal year 2026, the standard CONUS per diem rate is $178 per day, made up of $110 for lodging and $68 for meals and incidental expenses. For meals and incidental expenses only, the rates are $86 per day for travel to a high-cost locality and $74 per day for travel anywhere else in the continental United States. Those are the standard rates. Specific cities have their own published rates that are often higher, and the high-cost locality list changes each year. Using the standard rate for a trip to Manhattan is legal and leaves money on the table. The rates also reset with the federal fiscal year, meaning October 1, not January 1. A calendar-year business travels under two rate schedules every year. A policy document with last year's numbers in it is a real, if boring, source of error. 2. If You Are Self-Employed, You Do Not Get the Lodging Per Diem This is the single most common mistake, and it is expensive in both directions. Self-employed individuals filing a Schedule C can use the meals and incidental expenses per diem. They generally cannot use the lodging per diem. Hotel costs have to be actual, substantiated, receipted amounts. So a sole proprietor claiming $178 a day for a five-night trip is claiming something they are not entitled to claim. And a sole proprietor who thinks per diem is unavailable to them entirely and skips the M&IE per diem is keeping receipts they did not need to keep. Employees being reimbursed by an employer under a proper arrangement are in a different position and the full per diem, including lodging, can generally be used. Which brings up the structure that makes that work. 3. The Accountable Plan Is What Keeps a Reimbursement Off Your W-2 If your company reimburses you and there is no accountable plan, the reimbursement is generally treated as wages. It gets taxed, it gets payroll tax on it, and the deduction you thought you were getting turns into compensation you are paying tax on. An accountable plan requires three things: Business...

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