Car Wash Cost Segregation
The three positions our estimate uses for this property type, the components a study itemizes in the shorter lives, and an illustrative example from our estimate engine.
Conservative
50%
of building basis excluding land
Middle of the Road
70%
of building basis excluding land
Aggressive
90%
of building basis excluding land
The shares our estimate uses for this property type. What the three positions mean
Expected reclassification range 65% to 100%, midpoint 85%
The comparative band for every property type is SmartCostSeg house judgment used to gauge an allocation against the type's own Conservative, Middle of the Road and Aggressive positions; it is not an IRS threshold, an industry percentile or a published median.
The Conservative, Middle of the Road and Aggressive percentages for Car Wash are transcribed verbatim from the Expectation Guide row "Car Wash"; they are planning priors, not a substitute for documentation.
An Illustrative Example
Illustrative example computed by our estimate engine: purchase price $2,000,000, land $300,000 at the engine's default share of the price, acquired and placed in service January 1, 2026, so the engine applies a 100% bonus rate. The price and the land share are inputs for this example, not figures for this property type. Results vary with property specifics and your tax situation.
Without a study the estimate keeps the building on its 39 year life.
Building basis $1,700,000. First year depreciation without a study $43,590.
| Measure | Conservative | Middle of the Road | Aggressive |
|---|---|---|---|
| Share of the building basis moved | 50% | 70% | 90% |
| Moved to shorter lives | $850,000 | $1,190,000 | $1,530,000 |
| First year depreciation with a study | $1,700,000 | $1,700,000 | $1,700,000 |
| Additional first year deduction | $1,656,410 | $1,656,410 | $1,656,410 |
The Middle of the Road position, by class
- Modeled in the 5 year class$793,333
- Modeled in the 15 year class$396,667
- Wash building, modeled in a 15 year class$510,000
First year federal tax savings at each bracket, Middle of the Road
- At the 24% federal bracket: $397,538
- At the 32% federal bracket: $530,051
- At the 35% federal bracket: $579,744
- At the 37% federal bracket: $612,872
Federal income tax only. Your CPA confirms your bracket and any state effect.
These savings assume the full deduction can be used this year. Whether it can depends on your tax situation, including the passive activity rules, and your CPA decides. What a passive activity is
At these inputs all three positions give the same first year figure; they differ in the split between classes.
What Usually Moves to Shorter Lives
The components a study itemizes in the shorter lives for this kind of building, and confirms on your property. The example above splits by class only.
Itemized in the 5 year class
- Wash tunnel and bay equipment, pumps, brushes and controls
- Conveyor and roller systems that move vehicles through the wash
- Dryers and blowers
- Water reclaim, filtration and treatment systems
- Vacuum stations, arches and central vacuum producers
- Pay stations, kiosks and gate equipment
- Electrical branch circuits and outlets dedicated to equipment
- Plumbing connections dedicated to equipment and appliances
- Low-voltage security, access-control and data cabling
- Interior and exterior identity signage and graphics
- Miscellaneous removable finishes and accessories
Itemized in the 15 year class
- Pylon and monument sign structures
- Site and parking-lot lighting (poles, bases, circuits)
- Sidewalks and exterior hardscape
- Landscaping, shrubbery and planting beds
- Fencing, gates and retaining walls
Wash site work, modeled in a 15 year class with the wash building
- Concrete wash aprons, equipment pads and approaches
- Queue, approach, exit and vacuum lane paving
- Trench drains, catch basins and wash water collection
- Exterior utility distribution serving the wash
What moves your number
- Express tunnel vs full-serve
- Specialized paving/drainage
The Building and Its Rules
Our estimate models the wash building and its site work in a 15 year class at every position. The class and the rule behind it are set out below, and your CPA decides whether it applies.
- Asset class 57.1 of Rev. Proc. 87-56 is titled Distributive Trades and Services: Billboard, Service Station Buildings, and Petroleum Marketing Land Improvements. It has a 20 year class life and a 15 year recovery period under the general depreciation system, and its description says it includes car wash buildings and related land improvements. Property with a class life of at least 20 years and less than 25 years is 15 year property under section 168(e)(1), and a building with a class life under 27.5 years is not nonresidential real property under section 168(e)(2)(B). A building takes the class of the activity in which it is primarily used, and a building leased to others generally takes the class of the lessee's activity. Source: IRS Publication 946 (2025), Appendix B, Table B-2; Rev. Proc. 87-56, 1987-2 C.B. 674, asset class 57.1; IRS Publication 5653 (Rev. 2-2025), chapter 2, part L, paragraph (5); IRC section 168(e)(1) and (e)(2)(B); Treas. Reg. section 1.167(a)-11(b)(4)(iii)(b) and (e)(3)(iii)
See It in a Sample Study
Express Car Wash
An acquisition study for this property type.
The sample study has its own price, land value and dates, and the full study engine builds it, so its figures differ from the example above.
Start With Your Own Property
The wizard asks the questions for this property type and routes it to the right lane.