How Is a Gas Station Depreciated?

Most commercial buildings are depreciated over 39 years. A gas station can be depreciated over 15 if it passes one test. That single classification can move hundreds of thousands of dollars of depreciation into the years you actually own the property. The question worth settling before anything else is whether your station qualifies.

I'll walk through the test, what counts and what doesn't, what happens if your property comes up short, and whether you still need a cost segregation study once the building qualifies.

The default: gas stations are 39-year property

Nonresidential real property is depreciated over 39 years under MACRS. By default, a gas station building sits in that bucket like any other commercial structure.

The exception is written into the tax code. Section 168(e)(3)(E)(iii) classifies a "retail motor fuels outlet" as 15-year property, whether or not food or other convenience items are sold at the outlet. If your building qualifies, the entire structure including the fuel island and the attached convenience store is 15-year property rather than 39-year.

It helps to separate this from cost segregation in your mind. A cost segregation study breaks a building into its components and assigns each one its correct recovery period. The retail motor fuels outlet rule works at the building level: it reclassifies the entire shell from 39-year to 15-year property in one step.

They are two different tools, and a gas station can use both.

The 15-year retail motor fuels outlet rule

Your building qualifies as a retail motor fuels outlet if it meets any one of these:

• 50% or more of the gross revenue generated from the property comes from petroleum sales, or
• 50% or more of the floor space is devoted to petroleum marketing sales, or
• the building is 1,400 square feet or less.

You only need to clear one of the three.

For most conventional stations, the revenue test is the easy one. A fuel-forward station usually earns the majority of its gross revenue from gas, which clears the 50% threshold without much analysis. The floor-space test and the 1,400-square-foot rule are there for the stations where the revenue mix runs closer to the line.

What counts as petroleum sales (and what doesn't)

The exclusions are where many investors get tripped up, so it's worth being precise.

For the revenue test, petroleum sales mean fuel. They do not include the labor charged on an oil change, and they do not include non-petroleum products such as tires and oil filters. A station with a busy service bay can earn a lot of revenue that does not count toward the 50%.

For the floor-space test, only space devoted to petroleum marketing counts. Space given over to a restaurant, a laundromat, showers, a TV lounge, or a game room does not count even at a truck stop, where those amenities exist to bring fuel customers in. The Eighth Circuit confirmed this in the Iowa 80 truck-stop case, excluding exactly those areas from the calculation.

One more rule catches owners off guard: you count all of the businesses operating in the building, not only your own. If you lease space to a coffee franchise or a quick-service restaurant, that tenant's revenue and floor space go into the calculation alongside yours. The owner's identity does not matter, what matters is the use of the building as a whole.

You generally measure in the year the property is placed in service. If it goes into service late in the year and that short period isn't representative, you may be able to use the following year instead.

A gas station depreciation example

Say a station does $2.4 million in annual gross revenue.

• Fuel accounts for $1.56 million of that, with the remaining $840,000 coming from in-store merchandise, food, and services.
• Fuel is 65% of gross revenue.
• That clears the revenue test on its own, and the entire building is 15-year property. No analysis of floor space is needed.

Now change the facts.

• The convenience store runs 3,500 square feet, most of it merchandise and a small kitchen.
• Fuel is only 35% of revenue.
• This building fails the revenue test, fails the floor-space test, and is far too large for the 1,400-square-foot rule.

So it doesn't qualify for the whole-building treatment and the shell doesn't get reclassified to 15-year property in one step the way a qualifying station does.

But that second station is not out of options. It just gets to its deductions through a cost segregation study that can still pull a meaningful share of the property into 5- and 15-year buckets.

What if your gas station doesn't qualify?

When a station fails all three tests, the building shell stays at 39 years, but the property is still full of shorter-lived assets. A cost segregation study pulls them out.

In a typical gas station, that breakout looks roughly like this:

• Fuel dispensers, pumps, and storage tanks: 5-year property.
• In-store equipment — coolers, refrigeration, shelving, point-of-sale systems: 5-year property.
• Paving, curbing, site lighting, signage foundations, and the footings that anchor the fuel canopy: 15-year land improvements.
• The convenience-store shell and general building systems: 39-year property.

One component calls for care: the fuel canopy itself. The footings under it are land improvements, but the canopy structure sits in less settled territory. The IRS has supported 5-year treatment for canopies that are genuinely removable, but the right answer depends on how the specific canopy is built and attached, so we document that one case by case rather than assuming it.

Even a station that fails the retail motor fuels outlet test still moves a meaningful share of its cost into 5- and 15-year buckets. It just gets there through cost segregation rather than through a single reclassification.

Gas stations and 100% bonus depreciation

The reason any of this deserves your attention in 2026 is bonus depreciation. The One Big Beautiful Bill Act restored 100% bonus depreciation, permanently, for qualifying property acquired and placed in service after January 19, 2025. Bonus applies to property with a recovery period of 20 years or less, which covers 15-year property.

Put the two rules together. A gas station that qualifies as a retail motor fuels outlet is 15-year property, and 15-year property is eligible for 100% bonus. A qualifying building can be written off in the first year you own it instead of over 39. The 5- and 15-year components of a station that doesn't qualify get the same treatment.

Do you need a cost segregation study for a gas station?

If the whole building qualifies as 15-year property, and 100% bonus writes it off in year one anyway, why pay for a cost segregation study at all?

The short answer: claiming the deduction is the easy part. Defending it is the part that takes work, and that's what the study is for.

The 15-year treatment is not automatic, and it is not self-evident from a closing statement. It rests on a factual claim about your building — that fuel is at least 50% of gross revenue, or that at least 50% of the floor space is devoted to fuel sales, or that the store is 1,400 square feet or less. Meeting one of those is what makes the building 15-year property.

Substantiating it is your responsibility as the taxpayer, and the proof is rarely a single figure. The revenue test requires your gross revenue split between fuel and everything else, with the exclusions handled correctly. The floor-space test requires a measurement that sets aside the areas that don't qualify. And because the test counts every business in the building, any tenant's revenue and floor space have to be folded in. None of that reconstructs easily after the fact.

Bonus depreciation doesn't reduce the need for that documentation. If anything, it raises it. A large first-year write-off built on a 15-year reclassification is exactly the kind of position that invites a closer look, and the bigger the deduction, the more it helps to have the basis for it documented and on file. The right time to build that file is the year you place the property in service, while the revenue records, the floor plans, and the purchase detail are all current. Reconstructing the support several years later, after an examiner asks for it, is far harder.

That's what a cost segregation study for a qualifying station actually produces:

• Building-specific revenue support showing the fuel and non-fuel split, with the proper exclusions applied.
• A floor-space diagram identifying which areas count toward petroleum marketing and which don't.
• Treatment of any leased concessions or subtenants, since the test aggregates all businesses in the building.
• Support for the measurement year, if the station was placed in service late enough that the initial period wasn't representative.

If the station doesn't qualify, the same study does the conventional work — separating the 5-year equipment, the 15-year land improvements, and the 39-year shell with engineered cost detail. Either way, you end up with a report that explains and supports how the property is being depreciated, prepared by the people who measured the building and ran the numbers. That shifts the documentation burden away from you and your CPA.

It’s important to note that a study does not guarantee an outcome, and no report makes a position audit-proof. There are also a few stations where it may not earn its cost — if a property is essentially land improvements with no real building, just a canopy, some pavement, and underground equipment, there may be little to document beyond what's obvious. That's a conversation to have with your CPA before you commission anything.

For most stations, though, there is a building, and that building is carrying a 15-year or heavily accelerated position that someone may eventually ask you to justify. Bonus depreciation hands you the deduction. The study is how you hold onto it. On a gas station, where the treatment of the entire building can ride on a single factual test, getting that support in place the first year is worth doing.