One recent client had just finished building a 120,000-square-foot facility with warehousing, production space, and an office build-out. A cost segregation study reclassified more than $3 million of the project into shorter-life property.

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Industrial properties often contain components that depreciate faster than the building itself: equipment pads, process electrical, HVAC serving production, dock equipment, and site improvements. Unless a study breaks them out, they're typically depreciated with the building over 39 years, even though many don't last anywhere near that long.

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The IRS allows these components to be classified as 5-, 7-, or 15-year property. That moves a large share of depreciation into the early years instead of spreading it over decades.

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R.E. Cost Seg works with manufacturers, warehouse owners, and logistics developers. Industrial properties typically reclassify 25% to 39% of depreciable basis into shorter-life categories.

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This article covers which industrial property components can qualify for accelerated depreciation and how the numbers work.

What Cost Segregation Means for Industrial Property Owners

If you own or operate industrial real estate, like a warehouse, manufacturing plant, cold storage facility, or distribution center, here's how cost segregation works in plain terms:

1. Most Industrial Properties Are Depreciated Too Slowly

When you buy or build a property, the IRS lets you write off that cost over time. For industrial buildings, the default depreciation schedule is 39 years. That means you deduct just a small slice of the cost every year, even though many parts of that building won't last anywhere near that long.

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In reality, a large share of your building isn't part of the permanent structure at all. It includes components like racking, specialty lighting, reinforced concrete for loading areas, dedicated HVAC systems for manufacturing, and exterior site work, all of which wear out or become obsolete far sooner.

2. Cost Segregation Identifies and Reclassifies These Components

Cost segregation is the process of identifying all the parts of your property that can legally be treated as short-life assets, meaning they can be depreciated over 5, 7, or 15 years instead of 39.

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Here's how that typically looks in an industrial facility:

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• 5-Year Property: Equipment foundations, electrical for machinery, specialty lighting, data cabling, racking systems.
• 7-Year Property: Office furniture, lockers, and some internal-use equipment.
• 15-Year Property: Paving, fencing, drainage, exterior lighting, landscaping.

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A study reviews the property component by component and classifies each piece under IRS guidelines, combining engineering knowledge with tax law. An engineering-based study with a property inspection documents these components so the classification can be supported if the IRS examines it.

3. The Goal: Front-Load Depreciation

Once those components are identified and reclassified, they become eligible for accelerated depreciation. That means much larger deductions in the early years of owning or improving the property, especially under the current bonus depreciation rules that allow 100% first-year write-offs for qualifying assets acquired and placed in service after January 19, 2025.

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If you can use the losses, that lowers taxable income in the early years of ownership, which can improve cash flow and after-tax returns for owners with high capital expenditures.

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One important consideration: accelerated depreciation is largely a timing benefit. When you sell at a gain, depreciation taken on 5- and 7-year personal property is recaptured as ordinary income (up to 37%) to the extent of the gain, rather than at the 25% maximum rate that applies to unrecaptured Section 1250 gain on straight-line building depreciation. A 1031 exchange can defer some or all of that tax, but since 2017 exchanges cover real property only, so Section 1245 recapture can still apply. Plan for recapture before you accelerate.

What Can Be Reclassified? Key Components in Industrial Buildings

Industrial properties vary widely, but they often include high-value components that qualify for accelerated depreciation. A good study typically breaks down:

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• Specialized electrical systems Dedicated wiring for machinery, control panels, subpanels, and high-voltage service lines.

• HVAC and ventilation systems Dust collection, fume hoods, exhaust fans, and systems serving production (not comfort) space.

• Plumbing for operations Compressed air lines, water lines to equipment, drains in production floors, and washdown stations.

• Concrete pads and equipment foundations Poured-in-place concrete for heavy machinery or exterior storage that's not structural.

• Interior finishes Epoxy floors, insulated wall panels, modular partitions, industrial shelving, and lighting tied to specific production areas.

• Site improvements Paving, fencing, retaining walls, signage, exterior lighting, landscaping, and stormwater systems.

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These elements wear out, become obsolete, or are replaced well before the 39-year mark, making them candidates for reclassification under a proper study.

When to Consider a Cost Segregation Study

Timing affects how much a cost segregation study can accelerate. Here's when it's most effective:

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• After new construction is completed If you've just finished building or expanding your facility, a study can immediately reallocate assets before depreciation begins.

• When purchasing an existing building Even without improvements, the purchase price can be broken down to accelerate portions like site work and utility infrastructure. Keep in mind that land value must be excluded from the depreciable basis, so proper allocation is essential.

• After renovations or equipment-driven upgrades Retrofitted an assembly line, added ventilation, or updated drainage systems? Those improvements likely contain assets eligible for faster depreciation.

• During the planning or budgeting phase Engaging a cost segregation specialist early allows for better tracking of costs, improving accuracy and results.

• Even years after you've placed the property in service Through a retroactive study and Form 3115, you can catch up missed depreciation and take the full adjustment in the current tax year—no amended returns required.

Don't Overlook Tenant Improvements in Industrial Spaces

If you're a landlord building out space for an industrial tenant, or a tenant funding your own improvements, those improvements are worth including in a cost segregation study.

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Industrial tenant improvements (TI) frequently include high-value components like reinforced flooring, specialized electrical systems, climate control for sensitive operations, and production-specific infrastructure. These aren't generic office build-outs. They're engineered for a specific use, and many of those components qualify for accelerated depreciation.

Who Gets to Depreciate Tenant Improvements?

Who can depreciate tenant improvements isn't decided by legal title alone. The party that holds the benefits and burdens of ownership of the improvements, which is usually the party that bears their cost, generally claims the depreciation.

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In practice:

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• Landlord-funded improvements (including tenant improvement allowances): The landlord generally depreciates, even if the tenant selects contractors and materials.
• Tenant-funded improvements: The tenant generally depreciates, even if the improvements revert to the landlord at the end of the lease.

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Lease terms can shift this, so review the agreement with your CPA. If you're a landlord offering TI allowances to attract industrial tenants, or a tenant investing in specialized build-outs, a cost segregation study can accelerate those deductions.

Qualified Improvement Property (QIP) Adds Another Layer

Many interior tenant improvements also qualify as Qualified Improvement Property (QIP), which carries a 15-year recovery period and is eligible for bonus depreciation. QIP applies to improvements made to the interior of an existing nonresidential building, as long as the improvement doesn't enlarge the building, involve elevators or escalators, or affect the internal structural framework.

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For industrial TI projects, think new production floors, upgraded ventilation systems, or interior partition walls. A cost segregation study can identify which components fall into 5-, 7-, or 15-year categories, and which portions qualify as QIP for bonus treatment.

What are the critical timing rules for 100% Bonus Depreciation?

Understanding the January 19, 2025, Threshold

The One Big Beautiful Bill Act (OBBBA) permanently restored 100% bonus depreciation, but eligibility depends on meeting specific timing requirements. To qualify for the permanent 100% rate, property must be both acquired and placed in service after January 19, 2025.

This distinction matters. Property placed in service between January 1, 2025, and January 19, 2025, as well as property acquired on or before January 19, 2025, and placed in service after that date, remains subject to the prior bonus depreciation phase-down rules: 40% for property placed in service in 2025 and 20% in 2026.

What counts as the acquisition date? Under the regulations, property is not treated as acquired after January 19, 2025, if a written binding contract existed on or before that date. An enforceable contract signed in December 2024 for a facility that won't be completed until mid-2025 means the entire project falls under the 40% rules, not 100%.

The Component Election: A Planning Opportunity for Projects Under Construction

For industrial developers with projects that straddle the January 19, 2025, threshold, IRS Notice 2026-11 confirms that the component election under Section 1.168(k)-2(c) remains available. This election allows taxpayers to claim 100% bonus depreciation on individual components of larger self-constructed assets, even if construction on the overall project began before January 20, 2025.

In practice, this means developers with long lead-time projects can carve out eligible systems, such as special-purpose electrical systems, removable flooring, specialized HVAC, or production equipment foundations, and apply 100% bonus depreciation to those components acquired and installed after January 19, 2025, while the rest of the project depreciates under the phase-down rules.

For a manufacturing facility where site work began in October 2024 but interior electrical and HVAC systems weren't installed until March 2025, the component election could allow additional deductions on those later-installed systems.

The 10% Safe Harbor for Self-Constructed Property

Industrial owners building their own facilities should understand the 10% safe harbor test. If, before January 20, 2025, you paid or incurred more than 10% of the project's total cost (excluding land and preliminary activities like planning, design, and financing), the project is treated as acquired under the pre-OBBBA rules. The entire eligible basis would generally be limited to 40% bonus depreciation for property placed in service in 2025, or 20% in 2026.

However, even in these situations, the component election provides relief by allowing 100% treatment on qualifying components acquired after the threshold date.

What the Numbers Look Like for an Industrial Project

Imagine you're building a $10 million logistics facility with warehousing, fleet maintenance, and an office mezzanine. Industrial properties typically reclassify 25% to 39% of depreciable basis into 5-, 7-, or 15-year property. If the full $10 million is depreciable basis, that's $2.5 million to $3.9 million. Let's say $3.5 million.

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With 100% bonus depreciation in effect for assets acquired and placed in service after January 19, 2025, that entire $3.5 million could be deducted in Year One. At a 37% rate, that's about $1.3 million of federal tax; for a C corporation at 21%, about $735,000. The actual figure depends on your tax rate, entity structure, state tax treatment, and whether you can use the loss.

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How you can use the deduction depends on how you hold the property. If you operate your business in a building you own directly, the depreciation is generally a business deduction, subject to the excess business loss limit. If an entity you own leases the building to your operating business, the self-rental rules apply. Investor-owned industrial property is generally a passive rental activity, so offsetting other income requires Real Estate Professional Status and material participation.

Work with a Partner Who Understands Industrial Assets

Industrial buildings are complex, and so is the tax code. Cost segregation helps you align your depreciation schedule with the real-world wear-and-tear of your property's components. Getting it right takes a specialist who understands both the asset and the tax rules.

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R.E. Cost Seg works with manufacturers, warehouse owners, and logistics developers to identify eligible assets and document each classification so it can be supported if examined. We understand the difference between a structural slab and an equipment pad, and we know how to document it properly.

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Whether you're breaking ground on a new facility or looking back at prior projects, request a free proposal to see what a study would show on your property.

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