Industrial & manufacturing
A plant is not one 39-year building. It is a building plus a process.
Warehouses, distribution centers, and manufacturing plants run process electrical, racking, and dock equipment that the building's 39-year default was never built for. A study sorts the process from the shell.
The baseline
39 years for the shell. Much less for the process.
Industrial property is nonresidential, so the default schedule is 39 years. But a working plant or distribution center is more than four walls. Power and water get routed to machines, not just the building. Racking holds inventory. Trucks load and unload at the dock all day. Cost segregation separates the process from the shell, so the parts tied to running the business are not stuck on the building's schedule.
What reclassifies
Where the short-life parts hide in a plant or warehouse.
Process electrical and plumbing
When power or water runs to production equipment instead of the building, the share that serves the machines can move to a short life. A load study is what backs up the split.
Racking: equipment or structure?
Racking you can unbolt and move behaves like equipment. Racking that is built into the building and helps hold it up does not. Which one you have is a facts question, not a guess.
The dock
Dock doors and dock lighting usually stay with the building. Dock equipment, like levelers, seals, and bumpers, gets analyzed on its own facts instead of getting lumped in with the dock.
The yard
Paving, fencing, and site lighting around a plant or warehouse are qualifying land improvements, a 15-year life instead of 39.
The honest part
Not everything with wheels or steel is short-life.
On electrical, the courts have backed a measured split. InScott Paper Co. v. Commissioner, an electrical system serving both machines and the building was split based on a load analysis. InIllinois Cereal Mills, Inc. v. Commissioner, an appeals court upheld a 95%/5% split in the taxpayer's favor on the facts. That is why a load study is worth doing in a heavy-process building.
Racking and docks get a more careful answer. InL.L. Bean, Inc. v. Commissioner, a rack system that was integrated into the building and helped hold it up stayed real property. And inConsolidated Freightways, Inc. v. Commissioner, the dock doors and dock lighting were ruled structural components, even without permanent walls. Dock equipment you can point to on its own, like levelers and bumpers, is a different question.See what makes a study audit-defensible.
- What an industrial study documents:
- Shared electrical and plumbing split by load, not by guess
- Racking classified by whether it is structural or removable
- Dock equipment separated from the dock structure itself
- Site work at its 15-year class
New for manufacturers
A new 100% deduction for production buildings.
A 2025 tax law change addeda new deduction under IRC Section 168(n) for qualified production property: nonresidential real property used as an integral part of manufacturing, production, or refining. Construction has to begin after January 19, 2025 and before January 1, 2029, and the building has to be placed in service before January 1, 2031. Offices, parking, and finished-goods storage do not count.
This only helps new construction. It does not apply to a plant you already own or one you are buying that is already built. If that is your situation, a cost segregation study still helps. It sorts an existing or acquired building into the ordinary 5-year, 15-year, and 39-year classes, the same way it does for any other property, and that still speeds up real deductions.
For a manufacturer building or expanding a plant inside that window, this can put the entire qualifying production building on a first-year deduction, not just the personal property inside it.IRS interim guidance lays out how to allocate space and basis between qualifying and non-qualifying areas, which is exactly the allocation work a cost segregation study already does. This is a new, specific rule, so talk to your tax advisor about whether your facility and timeline fit before you rely on it.
Your plant already paid for these deductions.
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