Cost Segregation · Brief · Working level
Cost segregation for agricultural buildings and wineries
Farm property carries statutory shortcuts other real estate lacks: single-purpose agricultural structures at 10 years, general farm buildings at 20, grain bins at 7. Wineries split between short-life processing space and 39-year hospitality space.
Agricultural real estate plays by its own MACRS tables. A hog barn that qualifies as a single-purpose agricultural structure depreciates over 10 years — the whole building. Grain bins are 7-year equipment. A general machine shed is a 20-year farm building. None of these needs a study to reach its class; the cost segregation work in agriculture is making sure each structure lands in the right statutory box, then segregating the mixed-use properties — wineries above all — where processing and hospitality share a roof.
The statutory classes
Farm depreciation runs through specific MACRS classes in Pub 946:
Key agricultural property classes:
| Property | Class | Recovery period |
|---|---|---|
| Grain bins, drying and handling equipment | Asset class 01.1 equipment | 7-year |
| Single-purpose agricultural/horticultural structures | §168(e)(3)(D) | 10-year |
| Fencing, drainage tile, wells, paved lots | Land improvement | 15-year |
| General farm buildings (barns, shops, machine sheds) | Farm building | 20-year |
| Farmhouse rented to workers | Residential rental | 27.5-year |
| Winery tasting room, event, office space | Nonresidential real | 39-year |
The 10-year single-purpose class under Section 168(i)(13) is the prize and the trap together. Qualification demands a structure specifically designed and exclusively used for housing, raising, and feeding one type of livestock (with its equipment) or for commercial plant production in a greenhouse. Exclusive use is policed literally: incidental other uses — general storage, a shop corner, equipment parking — can disqualify the entire structure into the 20-year class. All classes of 20 years or less are eligible for 100% bonus depreciation on property acquired after January 19, 2025, which makes the 10-versus-20 distinction less about bonus and more about depreciation on pre-2025 property and state non-conformity.
Wineries: factory in front, restaurant in back
A winery is agriculture's mixed-use puzzle. The production side behaves like a small manufacturing facility: crush equipment, presses, fermentation tanks, glycol refrigeration, bottling lines, and barrel racks are 7-year property (10-year for fruit-bearing vines themselves is a separate matter, as are Section 263A preproductive rules), and the process piping, drains, and electrical dedicated to them follow the equipment under the primary-use analysis of the Audit Techniques Guide. Caves and barrel rooms raise fact-specific questions — humidity and temperature systems serving wine storage lean toward process classification.
The hospitality side is ordinary 39-year commercial space with retail-style components: tasting bars, decorative finishes, kitchen equipment for events, patio and parking site work at 15 years. A study's chief job is drawing the wall between the two, because shared systems (a well serving both, a parking lot serving both) get allocated.
The trap: exclusive use, forever
The single-purpose classification is not a one-time test. A poultry house converted to machinery storage, a greenhouse repurposed for retail sales, a hog facility idled and used generally — each fails the exclusive-use requirement going forward, and recapture rules under Section 1245(a)(3) treat single-purpose structures as Section 1245 property, so prior depreciation converts to ordinary income on disposition. Document the design intent at construction and the use over time; the class-life foundations are covered in asset classes and recovery periods.
Frequently asked questions
- What is a single-purpose agricultural structure for depreciation?
- Under Section 168(i)(13), a structure specifically designed and used exclusively for housing, raising, and feeding a particular type of livestock (including poultry) and its produce, or a greenhouse specifically designed for commercial plant production. Qualifying structures are 10-year MACRS property under Section 168(e)(3)(D) — the entire building, equipment and all — rather than 20-year farm buildings or 39-year nonresidential property.
- How fast do grain bins depreciate?
- Grain storage bins are 7-year MACRS property under asset class 01.1 in the Pub 946 tables — they are equipment, not buildings. Drying systems, conveyors, legs, and augers serving them are likewise short-life personal property. A general-purpose barn or machine shed, by contrast, is a 20-year farm building, and both are bonus-eligible.
- How does depreciation work for a winery building?
- By use, room by room. Production space — crush pads, tank rooms, barrel storage, bottling — is dense with 7- and 10-year equipment and process infrastructure, and dedicated utilities follow the equipment. The tasting room, event space, and offices are 39-year nonresidential property with ordinary retail-style components. Vineyard trellising and irrigation are separate land improvements and preproductive-cost questions.