Arizona Data Center Tax Incentives: Threshold, Exemptions, and Clawback

Arizona’s data center tax incentives eliminate state, county, and local Transaction Privilege Tax (TPT) and Use Tax on qualifying equipment purchases at certified facilities. To qualify, the owner or operator applies to the Arizona Commerce Authority (ACA), commits to a minimum capital investment within five years, and, once certified, extends the exemption to itself and its qualified co-location tenants for either 10 or 20 calendar years. The program is set out at A.R.S. § 41-1519 and administered jointly by the ACA and the Arizona Department of Revenue.¹

With a 5.6% state TPT rate before county and municipal additions, the exemption produces meaningful savings on the servers, cooling plants, generators, and switchgear that dominate a data center’s capital budget.

The Investment Threshold You Have to Hit

Certification is conditional. You get the letter first, but you have to back it up with actual capital investment within five years of the certification date, or the ACA can revoke.² The threshold depends on where the facility sits:

In Maricopa or Pima County (population over 800,000): at least $50 million in new investment.
In any other Arizona county: at least $25 million in new investment.

Eligible spending is broad. It covers land, buildings, improvements, modular data centers, and data center equipment, and it can be owned, leased, or held under a right-to-use agreement. The owner, operator, and qualified co-location tenants can all contribute to the total, so a facility built to house multiple tenants can count everyone’s spend toward the threshold.²

The five-year clock starts on the date of the certification letter, not the date you file the application or break ground.¹

Ten Years, or Twenty for a Sustainable Redevelopment Project

A standard certified data center enjoys the exemption for 10 full calendar years after the year of certification. A facility that qualifies as a Sustainable Redevelopment Project gets 20 full calendar years.²

Two routes lead to the 20-year window:

New construction: at least $200 million in investment and certification under Energy Star, Green Globes, LEED, or an equivalent standard.
Existing building: occupancy of a structure that was at least 50% vacant for six of the twelve months before acquisition, or attainment of one of those green building certifications without having been previously certified.

The greenfield path has a much higher capital floor than the basic certification minimum, so it fits large-scale campuses. The brownfield vacancy path is more accessible to operators repurposing underused industrial or commercial space.

Which Equipment Purchases Are Exempt

The statute defines qualifying equipment broadly: anything used to outfit, operate, or benefit the data center, including component parts, replacements, refreshes, and upgrades, whether owned, leased, or used under a right-to-use agreement.² In practice, that captures:

Power infrastructure: generators, UPS systems, switchboards, batteries, conduit, cabling, and testing equipment.
Cooling systems: mechanical cooling equipment, refrigerant piping, adiabatic and free cooling, cooling towers, water softeners, air handlers, fans, ducting, and filters.
Water conservation systems designed to collect, conserve, and reuse water.
Computing and networking gear: servers, chassis, switches, racks, cabling, trays, conduit, and enabling software.
Monitoring equipment and security systems.
Preassembled modular data center units and their components.
Other tangible personal property essential to operations.

That last catch-all category gives the exemption real reach. What it does not cover: Arizona’s retail classification statute separately excludes office furniture and supplies, janitorial equipment, hand tools, and motor vehicles required to be licensed in Arizona.³ Racks yes, office chairs no.

Co-Location Tenants Get the Exemption Too

Qualified co-location tenants inside a certified data center can buy their own equipment tax-free under the same exemption.² The tenant’s qualification window works on its own clock, though. It starts when the tenant signs its occupancy or use agreement, and it ends at the earlier of two dates: the end of the agreement term, or the end of the 10th full calendar year after the tenant signed (20th year for a Sustainable Redevelopment Project). The tenant window also cannot outlast the data center’s own certification period.

Practically, a tenant on a three-year lease gets three years of exemption, not ten. Longer occupancy agreements capture more of the benefit.

How to Apply for Certification

Only the owner or operator of the facility can apply. Co-location tenants cannot file on their own. The application goes to the Arizona Commerce Authority and must include the owner or operator’s name and contact information, the facility address, and enough detail to identify which portions of the building will function as the data center.² Applicants seeking the Sustainable Redevelopment designation must describe the anticipated investment and document the green building certification or the vacancy history of the existing structure.

The ACA has 60 days from receipt of a complete application to either issue written certification or provide written reasons for denial. When certified, a copy of the letter goes directly to the Arizona Department of Revenue with the effective date. Approval is subject to processing fees, and applicants must comply with Arizona’s employment eligibility verification requirements under A.R.S. § 23-214(B).¹

Once you have the letter, give copies to your equipment vendors. They rely on that documentation to justify not collecting TPT on your purchases, and keeping it accessible avoids refund claims later.

Clawback if You Miss the Investment

If the ACA determines that a certified data center has not met its required investment within the five-year window, it revokes certification. Revocation ends the qualification period for the owner, operator, and every co-location tenant in the facility.²

The Department of Revenue can then recapture all or part of the tax relief already provided to the owner and operator. Every dollar of TPT you didn’t pay on qualifying equipment can be pulled back. Qualified co-location tenants are generally shielded, with one exception: contributing co-location tenants in data centers certified after August 31, 2016 can face recapture too. Owners and operators can appeal a revocation through the administrative appeal process under A.R.S. Title 41, Chapter 6, Article 10.

That risk makes the investment projection at the application stage more than a formality. Overstating your five-year spend to secure certification and then falling short creates a liability that can outweigh the original savings.

Federal Deductions That Stack on Top

Arizona’s exemption is a sales-tax program. Federal income tax rules give you a second layer of savings on the same equipment.

100% Bonus Depreciation Under Section 168(k)

The One Big Beautiful Bill Act of 2025 permanently reinstated 100% bonus depreciation for qualified property acquired after January 19, 2025. Data center equipment placed in service in 2026 can be fully deducted in year one instead of depreciated over its recovery period. New and used equipment both qualify.

Section 179 Expensing

For 2026, the Section 179 deduction limit is $2,560,000, with a phase-out beginning at $4,090,000 in total equipment purchases. Section 179 is narrower in scale than bonus depreciation but occasionally captures items bonus depreciation misses, so it remains useful for targeted purchases below the phase-out ceiling.

Section 179D for Energy-Efficient Systems

Operators investing in energy-efficient HVAC, lighting, envelope, and hot water systems that achieve at least 25% energy savings may qualify for the Section 179D deduction. The deduction runs from roughly $0.50 to over $5.00 per square foot depending on energy savings achieved and whether the project meets prevailing wage and apprenticeship requirements.⁴ Under the One Big Beautiful Bill Act, Section 179D does not apply to property where construction begins after June 30, 2026, so the window is closing for new projects.

1
Arizona Commerce Authority. Computer Data Center Program
2
Arizona Legislature. Arizona Code 41-1519 – Computer Data Center Tax Relief; Definitions
3
Arizona Legislature. Arizona Code 42-5061 – Retail Classification; Definitions
4
Department of Energy. 179D Energy Efficient Commercial Buildings Tax Deduction