For enterprise CFO / VP Tax / CIO

Cost segregation for enterprise on-prem data centers

Bank, healthcare, large enterprise on-prem DC infrastructure. $5–25M basis. Form 3115 §481(a) catch-up on prior-year placed-in-service facilities — the most valuable engagement type for enterprise.

Why the Form 3115 lookback is the highest-value enterprise engagement

Most enterprise on-prem data centers were placed in service during the TCJA + CARES Act + pre-OBBBA phase-down years (2017–2024) — high-bonus-depreciation eras (100% / 100% / 100% / 100% / 80% / 60%) where cost segregation could have captured aggressive accelerated MACRS but typically didn't. Standard tax-department practice on enterprise capex is straight-line 39-year, default-classification, no engineering analysis. The missed deduction sits dormant.

Form 3115 §481(a) recaptures the cumulative difference between actual claimed depreciation and what a properly-engineered cost-seg study would have allowed — in a single deduction in the current tax year, without amending prior returns. For a $20M enterprise DC placed in service in 2020 (100% bonus year) with 50% reclassifiable, the §481(a) catch-up is often in the multi-million-dollar range.

  • Automatic-consent procedure under Rev. Proc. 2015-13 — no IRS pre-approval required, just timely-filed Form 3115 with the return.
  • No amended returns. The full catch-up surfaces in the current year.
  • Engineering workpapers included — §481(a) computation, hypothetical depreciation schedule, comparison to actually-claimed depreciation, Form 3115 line-by-line reference.
  • Coordinate with external audit on DTL movement before filing. We provide the engineering documentation; your CFO + external auditor own the financial-statement treatment.

Worked example: $15M healthcare on-prem DC, 6-year lookback

Illustrative; healthcare-provider on-prem DC placed in service 2020 (100% bonus year), never engineered. Actual depends on basis, capex history, and tax-position timing.

Facility
Healthcare-network on-prem DC, ~3MW, single-tenant
Depreciable basis
$15,000,000
Placed in service
2020 (100% §168(k) bonus year)
Illustrative engineering-estimated reclassification
50% = $7,500,000 into accelerated MACRS
§481(a) cumulative catch-up
~$6,200,000 current-year deduction (difference between engineered + claimed depreciation across 2020–2025)
Estimated federal tax savings
~$1,300,000 at 21% corporate rate
Study fee
$29,995

Assumes 21% federal corporate marginal tax rate. Healthcare-provider tax positions vary; individual taxpayer brackets differ. Verify with your CPA or tax department before filing. State conformity to §168(k) varies.

Enterprise questions

We placed our on-prem data center in service over 5 years ago. Can we still recover the missed depreciation?
Yes — and for most enterprise on-prem owners, this is the single most valuable cost-seg engagement type. Form 3115 (Application for Change in Accounting Method) under automatic-consent in Rev. Proc. 2015-13 may allow a §481(a) cumulative catch-up of previously-missed accelerated depreciation in the current tax year — without amending prior returns. For DCs placed in service 2017–2024 (TCJA + CARES Act + pre-OBBBA phase-down years), the lookback captures bonus depreciation at the rates available in the original PIS year. We provide the §481(a) workpaper pack; your tax department / CPA files the Form 3115. Verify with internal tax counsel before filing.
Is the buying audience the CIO, the CFO, or the VP Tax?
All three, in different roles. The CFO or VP Tax evaluates the after-tax cash impact and signs off. The CIO typically owns the facility documentation (capex schedules, equipment lists, capacity plans) and is the operational stakeholder for the engineering review. The controller or director of fixed assets handles the depreciation schedules and Form 3115 filing mechanics. Cost Seg Smart engagements typically start with the tax/finance side; we coordinate the equipment-list and capex-schedule pull from the CIO team.
How does this affect our internal accounting and audit?
Cost segregation changes federal tax depreciation methodology but does NOT change book / GAAP depreciation (those are governed by ASC 360 useful-life policies set by the company). For external audit, the change in tax depreciation surfaces in the company's deferred tax liability (DTL) calculation. Most large-enterprise tax departments coordinate the §481(a) catch-up with their external auditor before filing to ensure the DTL movement is properly characterized. Cost Seg Smart provides the engineering workpapers; the audit coordination stays with the company's CFO and external audit firm.
Can a regulated entity (bank, healthcare provider) do cost segregation on its data center?
Yes. Cost segregation is a federal income tax depreciation methodology under IRC §168 + Rev. Proc. 87-56 — it doesn't conflict with bank regulatory capital calculations, OCC reporting, healthcare compliance frameworks, or industry-specific accounting standards. The deduction flows through the federal tax return; book treatment is unchanged. Banks and healthcare providers with on-prem DC infrastructure are among our most common enterprise customer profiles for the §481(a) lookback engagement type.
What documentation will you need from our facilities team?
Closing statement or original construction contract (basis), capex schedule for any post-acquisition upgrades, equipment lists (UPS, CRAH/CRAC, generators, electrical distribution, fire suppression), placed-in-service dates, and as-built drawings if available. We're glad to coordinate directly with your facilities engineer, FM team, or commissioning agent to assemble component documentation. The cost segregation analysis is ours to deliver; documentation pull is a collaborative effort with your CIO/facilities side.
Do you require a site visit for a $20M enterprise DC?
At $3M+ basis, site visits are routine when property complexity warrants — specialized cooling infrastructure (liquid cooling, in-row precision cooling, hot/cold aisle containment), custom electrical distribution, significant tenant build-out (if the DC was converted from office space), or post-acquisition capex history that needs walkthrough verification. For standard enterprise on-prem facilities with full as-built drawings and equipment lists, satellite imagery + structured property documentation may suffice. The IRS Cost Segregation Audit Techniques Guide does not require a site visit; it requires engineering-based classification and component-level documentation.

Talk to your tax controller about the lookback.

Send original construction documentation + post-acquisition capex schedule and we'll model the §481(a) catch-up same day.

§481(a) workpaper pack included with every lookback engagement. See server room (sub-$5M) · cooling depreciation · UPS cost seg · audit defense