Does Arizona tax charging equipment as property?

Effectively not for most sites. Arizona exempts up to $500,000 of business personal property per taxpayer (2026) and values post-2021 equipment at a flat 2.5% of cost, so fast-charging hardware largely escapes the tax. The model sets the business-personal-property line to effectively zero for Arizona.

Which Arizona utilities does the model cover?

APS in greater Phoenix (the Rider DCFC pilot on Schedule E-32 TOU L) and TEP in greater Tucson (the DCFCX stand-alone EV charging rate). Salt River Project, which serves much of the East Valley, sets its own rates outside Commission regulation and is not in the tariff library — an SRP-territory address resolves to a named banner, not an auto-selected rate.

Are Arizona's rates about to change?

Both APS and TEP are before the Corporation Commission with rate cases requesting mid-teens increases, and both propose annual formula-rate adjustments. Orders are expected to change filed rates around early 2027; the modeled rates carry a re-derive note.

ForgeAsset / Supercharger ROI / Arizona

Tesla Supercharger ROI in Arizona

Arizona pairs filed EV-specific charging rates in both of its major metros with one of the library's lightest equipment taxes, across two investor-owned utilities that are both mid-rate-case right now. ForgeAsset models APS's Rider DCFC pilot on Schedule E-32 TOU L (Phoenix) and TEP's DCFCX stand-alone EV charging rate (Tucson) against Arizona's tax stack, with the state transaction privilege tax folded into the rates.

Model a Arizona site

What makes Arizona economics distinct

Near-zero tax on new equipment

Arizona exempts up to $500,000 of business personal property per taxpayer (effective 2026), and equipment first classified in 2022 or later is valued at a flat 2.5% of acquisition cost rather than a declining schedule. Together, most fast-charging hardware effectively escapes business personal property tax — a quantifiable, legislatively explicit capex advantage rather than an artifact of assessment practice.

Two utilities, two live rate cases

APS (Phoenix) and TEP (Tucson) are both before the Corporation Commission requesting increases in the mid-teens, with orders expected to reshape rates around early 2027. Both are also pursuing a formula-rate mechanism that would let them adjust rates annually without a full case. The modeled rates carry a re-derive note tied to those orders.

Filed EV rate relief in both metros

For APS territory the model carries the filed Rider DCFC pilot: billed demand is capped as a function of the month's energy, so at fast-charging utilization the demand line falls well below plain per-kW billing (rates shown in the table below). The rider is a 500-account pilot whose cap tightens in mid-2028 and sunsets after mid-2031; the modeled row assumes enrollment and discloses that assumption. For TEP territory the model carries the filed DCFCX stand-alone EV charging rate: there is no per-kW demand charge — delivery cost is recovered through declining energy-block prices keyed to the site's load factor, and the rate carries no enrollment cap or sunset as filed. A Tucson site that stays on the standard large-service schedule instead faces one of the heavier demand charges in the library.

Two metros, and a coverage gap

APS serves greater Phoenix and TEP greater Tucson, both Commission-regulated. Salt River Project, which serves much of the East Valley (Tempe, Mesa, Chandler), sets its own rates outside Commission jurisdiction and is not in the modeled library — so a site in SRP territory falls outside both schedules and resolves to a named-utility banner rather than an auto-selected rate.

Utilities and tariffs modeled in Arizona

Utility & tariff	Energy	Demand
APS E-32 TOU L + Rider DCFC	7.8¢/kWh–9.3¢/kWh by time of day	$18.08/kW of monthly peak, capped at kWh ÷ 146 h
TEP DCFCX Stand-Alone EV Charging	4.0¢/kWh–8.3¢/kWh by time of day	none

Rates are digit-verified against each utility's own filed sheets and update within two weeks of any revision. Full derivations are on the methodology page.

See Arizona in the US Supercharger Economics Map — every US Supercharger over utility territories colored by the derived effective electricity cost per dispensed kWh.

Arizona tax profile

Sales tax on hardware: 8.6%
Business personal property tax: none
Clean-fuels credit: no program
Per-kWh charging excise: none

Arizona tax defaults applied: no clean-fuels credit program exists in Arizona (the LCFS revenue line is $0), Arizona levies no LLC annual fee or franchise tax, business personal property tax on newly acquired equipment is effectively zero under the current valuation factor and exemption, and the sales-tax default uses a Phoenix retail example — contract structure and city rates vary and the field is editable. City transaction privilege taxes on electricity (Phoenix roughly +3.4 points, Tucson roughly +8.1 points) are not included in the tariff rates. Both Arizona utilities have pending rate cases; filed rates may change around late 2026.

Arizona programs and incentives

APS Rider DCFC (modeled)

An EV rider on the E-32 TOU schedules that caps billed demand at a load-factor ceiling — currently 20%, stepping to 15% in mid-2028 — sunsetting after mid-2031 and limited to 500 accounts statewide. The model applies it for APS territory with enrollment assumed; the assumption is disclosed on the rate row, and a non-qualifying site takes the standard schedule instead.

TEP DCFCX stand-alone EV rate (modeled)

TEP's filed rate for separately metered EV charging sites: no per-kW demand charge — delivery cost sits in declining energy-block prices keyed to load factor, with no enrollment cap or sunset and resale of charging energy allowed. The model carries it for TEP territory; a site that stays on the standard TILGS schedule faces its per-kW demand charge instead.

NEVI (federal, ADOT-administered)

Roughly $76.5 million over five years funding up to about 70 stations along I-10, I-8, I-40, I-17, and I-19; each carries at least four 150 kW connectors supporting both NACS and CCS.

Arizona charging market

Arizona carries roughly 63 Supercharger stations across the Phoenix and Tucson metros and the I-10, I-17, and I-40 corridors. Its economics pair filed EV-specific rates in both metros with a near-zero equipment tax, and both utilities are mid-rate-case, so filed rates carry a short shelf life.

Arizona Supercharger ROI — questions

Does Arizona tax charging equipment as property?: Effectively not for most sites. Arizona exempts up to $500,000 of business personal property per taxpayer (2026) and values post-2021 equipment at a flat 2.5% of cost, so fast-charging hardware largely escapes the tax. The model sets the business-personal-property line to effectively zero for Arizona.
Which Arizona utilities does the model cover?: APS in greater Phoenix (the Rider DCFC pilot on Schedule E-32 TOU L) and TEP in greater Tucson (the DCFCX stand-alone EV charging rate). Salt River Project, which serves much of the East Valley, sets its own rates outside Commission regulation and is not in the tariff library — an SRP-territory address resolves to a named banner, not an auto-selected rate.
Are Arizona's rates about to change?: Both APS and TEP are before the Corporation Commission with rate cases requesting mid-teens increases, and both propose annual formula-rate adjustments. Orders are expected to change filed rates around early 2027; the modeled rates carry a re-derive note.

Sources

Model a Tesla V4 Supercharger site in Arizona — payback, NPV, IRR, and a 15-year cash flow from your own inputs.

Run a Arizona scenario

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ForgeAsset is software, not investment, tax, or legal advice — outputs are model estimates from your inputs, not guarantees. Rates and programs current as of research; verify current terms with each source before committing capital.