Data center owners can miss large deductions when tech infrastructure is lumped into the 39-year building. In one R.E. Cost Seg analysis of a 75,000-square-foot facility in Northern Virginia, the study identified $2.5 million in accelerated depreciation that the owner's CPA had not separated out.

Data centers contain more specialized technical infrastructure per square foot than almost any other commercial property type. Typically 25% to 39% of the depreciable basis qualifies for accelerated depreciation through proper cost segregation services, the same range we publish for industrial and warehouse property in our reclassification percentage benchmarks. With permanent 100% bonus depreciation, these components can be deducted in the first year.

Two Kinds of Asset, Two Separate Calculations

Before any of the numbers below make sense, one distinction has to be clear.

A cost segregation study reclassifies the building and its integral systems: shell, power distribution, cooling infrastructure, raised floor, structured cabling, security, and site work. That is where the 25% to 39% benchmark applies, and it is measured against depreciable basis rather than purchase price.

Owner-purchased IT equipment is a different matter. Servers, storage arrays, switches, and the rest of the compute stack are depreciated on their own schedules, typically as 5-year property under Rev. Proc. 87-56. That equipment is not part of the reclassification percentage. It generates its own deductions on top.

Both are real. Adding them together and presenting the total as a reclassification percentage produces a figure that will not reconcile against a proposal. Throughout this article, percentages refer to the building side only, and IT equipment is called out separately where it applies.

Server facilities present unique depreciation advantages because of their intensive technical systems. Specialized cooling equipment, redundant power infrastructure, and dedicated electrical distribution can all qualify for immediate expensing when properly classified.

For a data center with a $10 million depreciable basis, acquired and placed in service after January 19, 2025, cost segregation can produce roughly $2.5 million to $3.9 million in first-year deductions on the building side, before any separately purchased equipment.

What Makes Data Centers Unique for Cost Segregation?

Where the Short-Life Property Sits

Data centers pack more depreciable personal property into their footprint than traditional commercial buildings. Studies typically find four major categories that can qualify for 100% bonus depreciation.

Server racks and their supporting infrastructure qualify as 5-year property under IRS guidelines. This includes the physical rack infrastructure, cable management systems, and dedicated power distribution units installed as part of the build. Under the Big Beautiful Bill Act, these assets receive immediate expensing. The servers themselves, purchased separately, follow their own 5-year schedule outside the study.

Specialized cooling systems designed specifically for IT equipment also qualify for 100% bonus depreciation. These aren't standard HVAC systems. They're precision cooling units engineered to maintain specific temperature and humidity ranges for sensitive electronics.

Redundant power systems are another large category. UPS infrastructure, battery backup systems, and dedicated electrical distribution for server loads all qualify for 100% bonus depreciation when properly documented. Raised flooring systems, when installed primarily for cable management and cooling distribution, qualify as 15-year property eligible for full immediate expensing.

Can You Combine Cost Segregation with Energy Efficiency Incentives?

Energy-efficient data center components can carry a second tax benefit. Beyond standard cost segregation, facilities meeting energy efficiency standards qualify for Section 179D deductions. For property placed in service in 2025, the deduction runs up to $5.81 per square foot where prevailing wage and apprenticeship requirements are met, and up to $1.16 per square foot where they are not. These benefits stack with 100% bonus depreciation. Under the One Big Beautiful Bill Act, 179D isn't available for property whose construction begins after June 30, 2026.

High-efficiency cooling systems, LED lighting retrofits, and advanced power management systems qualify for both 179D deductions and accelerated depreciation. Free cooling systems using outside air, liquid cooling solutions for high-density computing, and renewable energy infrastructure all receive favorable treatment.

Water-saving technologies in cooling systems and heat recovery equipment that repurposes server exhaust for building heating also qualify for accelerated treatment.

Coordinate the 179D certification with the cost segregation study so the two analyses use consistent cost figures.

How Does Land Value Affect Your Cost Segregation Study?

Land value directly impacts the depreciable basis available for cost segregation. A $10 million purchase price might include $2 million in land value, leaving $8 million for depreciation. In high-value markets like Northern California or Northern Virginia, proper land allocation becomes critical.

R.E. Cost Seg uses comparable sales data and appraisal methodologies to support land valuations, so the building allocation holds up if examined.

How Does the Depreciation Advantage Break Down?

The Big Beautiful Bill Act changes the math. Standard commercial buildings depreciate over 39 years using straight-line methods. Data center cost segregation reclassifies significant portions to shorter-life property eligible for 100% bonus depreciation.

Consider a data center with a $10 million depreciable basis, acquired and placed in service after January 19, 2025. Traditional depreciation generates approximately $256,000 in annual deductions. After professional cost segregation services identify the qualifying infrastructure, first-year deductions run around $3.2 million at the midpoint of the range, and up to roughly $3.9 million where the facility supports an optimized result.

If the owner can use the losses, that deduction reduces tax in year one.

Which Critical Tech Infrastructure Components Qualify?

Dedicated Electrical Systems for Servers

Data center electrical systems are divided into distinct categories for depreciation purposes. Branch circuits feeding server racks qualify as 5-year property, now eligible for 100% bonus depreciation. These dedicated circuits, including power distribution units (PDUs) and remote power panels, serve specific IT equipment rather than general building operations.

R.E. Cost Seg engineers analyze electrical load calculations to determine allocations. A typical data center dedicates 30% to 50% of its total electrical distribution to server equipment. With permanent 100% bonus depreciation, that share of the electrical system can be deducted in the first year. Each circuit requires individual assessment to establish its primary purpose and corresponding tax treatment.

Power monitoring systems and intelligent PDUs that track server consumption also qualify for immediate expensing. These components directly support IT operations and fall outside standard building infrastructure classifications.

Specialized Cooling Infrastructure

Precision cooling systems maintain the controlled environment that servers require. CRAC units, in-row cooling systems, and hot/cold aisle containment structures all qualify for 100% bonus depreciation as 5-year property. These systems differ fundamentally from comfort cooling designed for human occupancy.

Chilled water systems dedicated to IT equipment receive similar treatment. When cooling infrastructure serves both office and server spaces, cost segregation services allocate costs based on capacity percentages. Documentation from mechanical engineers supports these allocations during IRS review.

Backup Power Systems

Uninterruptible power supplies protect data center operations from power fluctuations and outages. These UPS systems, along with their associated battery banks and automatic transfer switches, qualify for 100% bonus depreciation. Generator systems supporting IT loads receive proportional allocation based on their dedicated capacity.

Consider a 2MW data center with $3 million invested in power infrastructure. Proper classification typically moves $1.8 million of that subsystem to shorter-life property. With 100% bonus depreciation, this entire amount becomes immediately deductible, generating approximately $630,000 in first-year tax savings at a 35% rate.

Redundant systems installed for fault tolerance receive the same treatment as primary systems. This includes parallel UPS configurations, dual power feeds, and N+1 cooling designs standard in enterprise facilities.

How Are Server Facilities and Equipment Classified?

Core Computing Infrastructure

Server racks and cabinets form the backbone of data center operations. When installed as part of the build-out, these components and their integrated cable management systems qualify as 5-year property eligible for 100% bonus depreciation and sit inside the study. Network switches, routers, and storage area networks purchased as equipment receive the same 5-year treatment, but on their own schedule outside the reclassification percentage.

Fiber optic cabling throughout server facilities qualifies for immediate expensing when properly documented. This includes horizontal and vertical cable runs, patch panels, and connection hardware. R.E. Cost Seg studies capture these assets through detailed site visits and construction document review.

Structured cabling is easy to miss in standard tax preparation. A 50,000-square-foot data center typically contains $500,000 to $800,000 in qualifying telecommunications infrastructure. With 100% bonus depreciation, this entire amount becomes immediately deductible.

Security and Monitoring Systems

Biometric access systems protecting server rooms qualify as 5-year property eligible for 100% bonus depreciation. This includes card readers, retinal scanners, and mantrap entries. Security cameras monitoring the IT infrastructure receive similar treatment when their primary purpose involves equipment protection rather than general surveillance.

Environmental monitoring equipment tracks temperature, humidity, and airflow within server spaces. These specialized sensors and their associated software platforms qualify for immediate expensing. Fire suppression systems using clean agents designed specifically for electronics protection also receive 100% bonus depreciation treatment.

Raised Floor Systems

Raised flooring in data centers serves technical rather than architectural purposes. These modular systems provide cable management pathways and optimize airflow for cooling efficiency. When installed primarily for IT infrastructure support, raised floors qualify as 15-year property eligible for 100% bonus depreciation.

Documentation establishing the floor's technical purpose proves critical during IRS examination. Construction specifications, design narratives, and mechanical drawings support proper classification.

Leased Data Centers and Tenant Improvements

Can Tenants Benefit from Cost Segregation?

Tenants making substantial improvements to leased data center space can benefit from cost segregation and the 100% bonus depreciation rules. Qualified improvement property acquired and placed in service after January 19, 2025, is eligible for immediate expensing. Server infrastructure installed by tenants qualifies for 100% bonus depreciation as 5-year property.

Colocation facilities present unique opportunities. Both landlords and tenants can claim depreciation on their respective investments. Landlords expense qualifying infrastructure and common systems. Tenants expense cage buildouts, dedicated cooling, and their specific equipment. Clear lease agreements defining ownership prevent both parties from claiming the same asset.

How Industry Trends Affect Your Depreciation Strategy

Emerging Technologies and Their Tax Implications

AI computing infrastructure with specialized GPU clusters qualifies for accelerated depreciation. These high-density computing environments often require liquid cooling systems and enhanced power distribution, both of which qualify as shorter-life property within the study.

Hyperconverged infrastructure, combining compute, storage, and networking in a single unit, receives favorable treatment. Software-defined data centers with virtualized infrastructure components qualify based on their underlying hardware classifications.

Immersion cooling systems are gaining popularity for high-performance computing and qualify for immediate expensing. These cooling solutions, along with their specialized tanks and fluid management systems, represent personal property rather than building components.

Do Specialized Facilities Like Crypto Mining Qualify?

Cryptocurrency mining facilities and edge data centers receive treatment similar to traditional data centers under the Big Beautiful Bill Act. On the building side, they follow the same 25% to 39% range, and heavily built-out sites with substantial power infrastructure and site work tend toward the upper end.

The larger numbers come from the equipment. Mining rigs typically represent a far larger share of total capital than the building does, and they are depreciated as equipment on their own 5-year schedule. The combined first-year deduction can approach the entire investment, but that is two calculations stacked, not a single reclassification percentage.

Edge computing facilities embedded in cell towers or retail locations follow the same logic. Micro data centers supporting IoT applications and distributed computing architectures receive identical treatment. The key determination involves the equipment's primary purpose. If it processes data rather than supporting building operations, it can qualify for 100% bonus depreciation.

How Do Multi-State Operations Affect Your Strategy?

Data center operators with facilities across multiple states face additional complexity. While federal depreciation rules under the Big Beautiful Bill Act apply uniformly, state tax treatments vary significantly. Some states conform to federal bonus depreciation rules. Others require separate depreciation schedules.

California and Virginia, for example, don't follow federal bonus depreciation, requiring separate tracking for state returns, and New York decouples for most property. Texas has no personal income tax.

Studies can be set up to support both federal and state depreciation schedules, which matters for operators with geographically distributed facilities.

How to Maximize Your Data Center Depreciation Strategy

When Should You Time Your Cost Segregation Study?

The Big Beautiful Bill Act creates new timing considerations. Property acquired and placed in service after January 19, 2025, receives permanent 100% bonus depreciation. Property acquired on or before that date still operates under the previous phase-down schedule, which ran at 60% for 2024. This creates a potential incentive to time acquisitions strategically.

New construction projects benefit most when cost segregation planning begins during design phases. R.E. Cost Seg engineers identify classification opportunities before construction starts, so documentation for 100% bonus depreciation claims is in place from the start.

Existing facilities also present opportunities. Properties already in service can file Form 3115 for an accounting method change, capturing missed depreciation without amending prior returns. There is no fixed look-back limit, provided you still own the property. While these older properties don't qualify for 100% bonus depreciation, the catch-up adjustment can still produce a large current-year deduction.

How Does Depreciation Affect Your CapEx Decisions?

The availability of 100% bonus depreciation changes capital expenditure planning. Projects previously delayed for budget reasons now generate immediate tax savings that offset cash outlays. A $5 million equipment upgrade generates $1.75 million in tax savings at a 35% rate, effectively reducing net cost to $3.25 million.

This dynamic can support shorter technology refresh cycles. Equipment previously depreciated over 5 years can now be deducted in the first year, which makes regular upgrades easier to fund.

CapEx timing around year-end matters. Projects placed in service by December 31 generate deductions for that tax year.

How Do You Choose the Right Cost Segregation Provider?

Data centers are more complex to study than most property types. R.E. Cost Seg's engineers work through data center systems from power distribution to cooling design.

Experience matters when defending positions during an IRS examination. Look for engineering-based studies built to hold up under examination, dedicated data center experience, professional engineers on staff, and audit support.

Beware of template-based studies that miss facility-specific components, and be equally wary of headline percentages well above the benchmark range for the asset class. A figure in the 50% or 60% band on the building side usually means IT equipment has been folded into the calculation. Each data center presents unique characteristics requiring customized analysis. R.E. Cost Seg conducts thorough site visits, examining actual installations rather than relying solely on construction documents.

What Documentation Do You Need for a Cost Segregation Study?

Successful data center cost segregation depends on comprehensive documentation. With 100% bonus depreciation at stake, proper records become even more critical. Detailed electrical load calculations prove essential for allocating distribution systems between building and IT operations. Equipment specifications and manufacturer cut sheets establish asset classifications.

As-built drawings highlighting IT infrastructure provide the roadmap for site visits. These documents identify dedicated systems qualifying for immediate expensing. Vendor invoices that segregate equipment costs from installation support precise allocations. Without proper documentation, aggressive positions become difficult to defend during an IRS examination.

What's the Real Financial Impact of Cost Segregation?

Case Study: 50,000 SF Data Center Facility Under New Rules

A recent R.E. Cost Seg study analyzed a data center project with a $25 million depreciable basis, scheduled for purchase in February 2025. Under the Big Beautiful Bill Act's permanent 100% bonus depreciation, the results were as follows.

Five-year property totaled $4.5 million, representing 18% of the depreciable basis. Seven-year property reached $1.5 million (6%). Fifteen-year property accounted for $2 million (8%). That is $8 million in total, or 32%, sitting at the midpoint of the range for this asset class. All of it qualifies for 100% bonus depreciation, generating immediate deductions rather than spreading over decades.

First-year deductions come to roughly $8.4 million, including depreciation on the remaining building basis, compared to $641,026 under traditional straight-line treatment. Assuming a 35% tax rate, this generates about $2.9 million in first-year tax savings. Servers and other equipment the owner purchases separately are depreciated on top of that figure.

What's the typical ROI on a data center cost segregation study under 100% bonus depreciation? 

In the case study above, about $2.9 million of first-year savings would be roughly 70 to 195 times a study fee of $15,000 to $40,000. Results depend on the facility, the bonus rate that applies, and whether the owner can use the losses.

What Happens If You Sell Your Data Center?

When selling property with accelerated depreciation, investors face recapture rules. Section 1245 property (5 and 7-year assets) recaptures as ordinary income up to the depreciation taken. With 100% bonus depreciation, the entire cost basis taken as an immediate deduction potentially faces recapture.

Planning strategies can reduce the impact. A Section 1031 exchange can defer some or all of the recapture; §1245 recapture can still apply if the replacement property has less §1245 property. The Big Beautiful Bill Act makes exit planning more important, given the larger depreciation amounts at stake. R.E. Cost Seg models recapture scenarios during initial studies, helping investors plan hold periods and exit strategies.

Staying Current with Legislative Changes

The Importance of Monitoring Tax Law Evolution

Tax legislation directly impacts data center economics. The Big Beautiful Bill Act shows how quickly rules change. Operators should work with tax professionals who monitor legislative developments.

Future legislation may enhance or modify current benefits. Proposals for increased energy efficiency incentives, infrastructure investment credits, and technology-specific deductions regularly appear in Congress.

State-level incentives also evolve rapidly. Data center tax abatements, sales tax exemptions on equipment purchases, and utility rate structures vary by jurisdiction. Comprehensive tax planning considers federal, state, and local opportunities.

Summary

The Big Beautiful Bill Act changes the math. Standard commercial buildings depreciate over 39 years using straight-line methods. Data center cost segregation reclassifies a quarter to nearly two-fifths of the depreciable basis into shorter-life property eligible for 100% bonus depreciation, with separately purchased equipment adding further deductions on its own schedule.

To give you a clear picture, let's dive a bit deeper into the depreciation calculation. To calculate these deductions, data center owners need the cost of the equipment, the date it was put into service, and knowledge of whether they've elected to use Section 179 or bonus depreciation. In the case of technical infrastructure like information systems, which include processors and computers, they typically have a class life of 5 years based on Rev. Proc. 87-56.

Suppose the equipment costs $10,000. For the first year, you would divide the $10,000 by its 5-year life to get $2,000. Then, you would multiply $2,000 by 200% to derive the depreciation for the first full year, $4,000.

Under the half-year convention, which treats property as placed in service at the midpoint of the year regardless of the actual date, first-year depreciation is 50% of $4,000, or $2,000.

Consideration should be given to recalculation if the useful life or basis of the asset changes significantly. Also, the rules vary for short tax years and for assets with an adjusted basis for any reason other than depreciation allowed or allowable - do make sure you're aware of this, and consult with a tax advisor to ensure you are using the correct method effectively.

Technical infrastructure components, from server facilities to specialized cooling systems, can qualify for immediate expensing when properly documented. 

Whether you own traditional data centers, colocation facilities, or crypto mining operations, proper classification determines how much of the facility you can deduct in the first year. Plan the study early and get it engineered.

Calculate Your Data Center Tax Savings Under 100% Bonus Depreciation

R.E. Cost Seg's engineering team works with both data center systems and the 100% bonus depreciation rules.

Request your free proposal to see what a study would show on your facility.

Our team will work with you to identify potential savings and keep the process straightforward.

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