Gas stations enjoy a statutory shortcut that almost no other building gets: the retail motor fuels outlet rule. Under IRC section 168(e)(3)(E)(iii) and IRS Pub 946, a qualifying station building is 15-year property in its entirety. Because bonus depreciation under section 168(k) covers any property with a recovery period of 20 years or less, the whole structure, not just carved-out components, can be deducted at 100 percent in year 1 for property acquired after January 19, 2025 under OBBBA. Car washes get there a different way: so much of a wash facility is equipment and site work that the 39-year shell is often a minority of the total cost.
The retail motor fuels outlet tests
A building qualifies as a retail motor fuels outlet if any one of these is true: 50 percent or more of its floor space is devoted to petroleum marketing sales, 50 percent or more of its gross revenues come from petroleum sales, or the building is 1,400 square feet or smaller. A classic station with a modest convenience store usually passes the revenue test. On top of the building itself, the rest of the property is naturally short-life anyway: pumps, dispensers, underground storage tanks, and point-of-sale equipment are 5-year personal property, while canopies, paving, curbing, lighting, and signage pylons fall into 5- or 15-year classes depending on construction, as discussed in the IRS Cost Segregation Audit Techniques Guide.
A worked example
A buyer closes on a $2,500,000 station in March 2026 and allocates $500,000 to land. Of the $2,000,000 depreciable basis, suppose $700,000 is the building, which meets the 50 percent revenue test and is therefore 15-year property; $750,000 is tanks, pumps, dispensers, and store equipment at 5 years; and $550,000 is canopy, paving, and site improvements at 15 years. Every dollar of that $2,000,000 sits in a 20-years-or-less class, so with 100 percent bonus the entire depreciable basis is potentially deductible in the first year. Compare a generic 39-year retail building of the same size, where first-year straight-line depreciation on the building portion would be about $17,949.
Why car washes rank with them
An express tunnel wash is mostly machinery: conveyors, arches, dryers, water reclaim, pumps, and the electrical and plumbing dedicated to them are 5-year property, and the lot is largely 15-year paving, vacuum canopies, and fencing. The building is a thin shell around equipment, so studies routinely find a large majority of basis in short-life classes.
Where the rule runs out
A large-format convenience store that fails both 50 percent tests and exceeds 1,400 square feet is ordinary 39-year nonresidential property; only its components reclassify. Property acquired on or before January 19, 2025 keeps the bonus phase-down, 40 percent for 2025 placements. And the fuel business itself raises non-depreciation issues, environmental compliance and inventory, that deserve their own diligence. Amadae's cost segregation screen models the motor-fuels classification and the first-year benefit as a screening estimate before you pay for an engineering study.