Arizona solar incentives 2026 guide

Arizona’s 2026 solar incentive stack is a state tax credit worth 25% of installed cost (capped at $1,000 lifetime, not annual), a sales tax exemption on equipment, a property tax exemption on the added home value, and utility net-billing export rates that vary by provider — the federal residential tax credit expired December 31, 2025, so the federal benefit is $0 for anything installed in 2026. Every dollar and cents figure below is an estimate; verify current numbers with DSIRE, your specific utility, and a tax professional before you sign a contract.

Arizona’s state solar tax credit: 25%, but capped low and shared for life

The Arizona Credit for Solar Energy Devices (ARS §43-1083, claimed on Form 310) refunds 25% of your installed system cost against state income tax — up to a maximum of $1,000. That’s the headline number installers quote, and it’s accurate as far as it goes. What often gets left out of the pitch is that the $1,000 cap is a lifetime limit per residence, not a per-project or annual cap. If a previous owner (or you, in an earlier year) already claimed the credit for that address, a new solar installation or battery addition at the same home can’t generate a second full credit.

The credit is nonrefundable — it only reduces tax you actually owe, so if your liability is smaller than the credit in a given year, you don’t get the difference back as a refund. The upside: unused amounts carry forward for up to five consecutive tax years, so most homeowners with a normal tax liability eventually capture the full $1,000.

On a system costing an estimated $2.35/W (varies by installer, roof complexity, and equipment — see solar panel cost in Arizona for current regional pricing), 25% of the installed cost typically exceeds $1,000 well before you reach a modest system size. In practice, the $1,000 cap — not the 25% rate — is the number that matters for almost every homeowner.

The two automatic exemptions: sales tax and property tax

Arizona layers two exemptions on top of the income tax credit, and both apply without an application in most cases.

Transaction Privilege Tax (TPT) exemption

Arizona exempts the retail sale of qualifying solar and wind energy devices — plus their installation, when performed by an AZDOR-registered or certified contractor — from the state’s Transaction Privilege Tax, the state’s version of a sales tax. Older guides sometimes mention a $5,000-per-device cap on this break; that cap no longer applies, so treat any reference to it as outdated. Confirm your contractor’s registration status, since the exemption depends on how the sale and installation are structured — it isn’t automatic regardless of vendor.

Property tax exemption on added value

Solar panels increase what your home is worth on paper. Under ARS §42-11054, county assessors are directed to add zero value to your property’s full cash value assessment for qualifying on-site solar generation equipment, as long as you document your installation cost to the assessor. In effect, this is a permanent, ongoing property tax exemption on the value solar adds to your home — you never pay higher property taxes because you installed panels, for as long as you own the system.

Neither exemption requires the paperwork of an income tax credit application, but both depend on documentation and contractor compliance — keep your records.

What happened to the federal solar tax credit

The federal residential solar tax credit — IRC §25D — expired December 31, 2025. The One Big Beautiful Bill Act, signed July 4, 2025, accelerated what would otherwise have been a longer phase-down, ending the credit outright for systems not fully installed and placed in service by the end of 2025. For any system purchased and installed in 2026, the federal credit is $0.

This is a real change from 2024 and 2025, when a 30% federal credit meaningfully shortened payback math nationwide. That number does not apply to new 2026 purchases — full stop. If an installer’s proposal still shows a 30% federal credit line item, ask them to point to current statute; there isn’t one for owned systems installed this year. Homeowners who completed a qualifying installation before 2026 may still carry forward unused prior-year credit, but that’s a legacy benefit, not a new one. For the full history and how it phased out, see the federal solar tax credit 2026 guide.

Leases and power purchase agreements (PPAs) work differently: the third-party owner of the system may access a commercial credit under §48E, which can lower your monthly lease payment. You don’t claim anything on your own return in that structure — the benefit flows through the financing company’s economics, not yours.

Net billing in Arizona: APS, TEP, and SRP are not the same

Arizona uses net billing (not full retail net metering), and the specific rate depends entirely on which utility serves you.

APS (Arizona Public Service), regulated by the Arizona Corporation Commission, sets its export rate through the Resource Comparison Proxy. Systems interconnected from September 1, 2025 through August 31, 2026 locked in about $0.062/kWh. On August 12, 2026, the ACC approved the maximum 10% step-down, so new APS interconnections from September 1, 2026 get roughly $0.0555/kWh. Once you interconnect, your tranche’s rate locks for 10 years; each later tranche can step down by up to 10% more.

TEP (Tucson Electric Power), also ACC-regulated, uses the same Resource Comparison Proxy mechanism, with tranches that run October through September and a rate assigned by your application date. TEP publishes $0.0462/kWh for the tranche running October 1, 2026 through September 30, 2027, down from $0.0513/kWh in the 2025–26 tranche (and $0.057/kWh the year before that). As with APS, the rate locks for 10 years once you’re in.

SRP (Salt River Project) is different in kind, not just in rate. SRP is a quasi-municipal utility governed by an elected board, not the ACC — so it isn’t bound by the APS/TEP net-billing framework at all. SRP runs its own Customer Generation export price plans, separate from the RCP structure, and its terms (including any seasonal rate adjustments) should be pulled directly from srpnet.com before you model savings. SRP’s export credits aren’t covered by the RCP’s 10-year lock: its TOU Export plan, for example, pays a flat 3.45¢/kWh and is scheduled to close in November 2029, when SRP moves solar customers to newer plans.

Across all three utilities, one theme holds: export rates for new customers (roughly 3.5 to 5.5 cents/kWh, depending on provider and interconnection date) sit well below Arizona’s average retail residential rate of around $0.154/kWh (EIA, 12-month average through July 2026). That gap is the reason system sizing and, increasingly, battery storage matter so much in Arizona solar math.

Why sizing — and possibly a battery — matters more in Arizona

Because export credits run an estimated 3 to 4 times lower than the retail rate you pay for grid electricity, every kWh you export instead of self-consuming is worth meaningfully less than a kWh you use directly or shift to your own evening consumption. A system that oversizes relative to your household’s usage generates a growing share of low-value exports rather than high-value offset.

A battery that stores midday solar surplus for use during evening peak hours can capture retail-rate value on electricity that would otherwise export at the lower net-billing rate. Whether that trade-off pencils out depends on battery hardware cost, installation complexity, and your specific utility’s rate structure — it’s a real, worthwhile calculation, not an automatic yes. Work through the tradeoffs in is a solar battery worth it? before adding one to your quote.

Arizona solar incentives 2026: summary table

A worked example: 7 kW system in Phoenix

Install a 7 kW system in the Phoenix area, where annual peak sun averages around 6.5 hours per day.

Gross annual production: 7 kW × 6.5 hours × 365 days = 16,608 kWh. That’s before real-world losses. Apply the standard 0.80 performance ratio — accounting for heat-related derating (a meaningful factor in Arizona summers), inverter conversion, wiring resistance, and any shading — and you land at approximately 13,286 kWh per year, or roughly 1,107 kWh per month.

Estimated system cost at $2.35/W: 7,000 W × $2.35 = $16,450 (estimate; actual quotes vary by equipment and installer — see solar panel cost in Arizona).

Apply the incentives that reduce upfront or ongoing cost:

• State tax credit: 25% of $16,450 = $4,113, capped at $1,000 (estimate, assuming no prior claim at this address)
• TPT exemption: savings embedded in the contractor’s quote rather than a separate rebate check (estimate)
• Adjusted net cost after state credit: ~$15,450 (estimate)

Annual electricity bill savings depend on how much of that output you use as it’s produced. Under net billing, only self-consumed kWh offset Arizona’s average residential rate of $0.154/kWh; exported kWh earn the utility’s export credit (APS pays $0.05554/kWh for the tranche that opened September 1, 2026). Assuming half is used on site, the same split our calculator uses:

• Self-consumed: 6,643 kWh × $0.154 ≈ $1,023
• Exported: 6,643 kWh × $0.05554 ≈ $369
• Total: ≈ $1,392/year (estimate)

Simple payback: $15,450 ÷ $1,392 ≈ 11.1 years (estimate). A household that runs its pool pump, EV charging, and AC pre-cooling during daylight and uses 70% of its output on site saves about $1,653 a year instead, for a payback near 9.3 years; if you only use a third of it, savings drop to about $1,174 and payback stretches past 13 years. Add the ongoing property tax exemption — worth some additional amount depending on your county’s millage rate and your home’s appraised value increase — and the effective payback improves slightly further. Run your own address, usage, and utility rate through the solar savings calculator — actual numbers shift with system size, financing, roof orientation, and your utility’s export rate.

Before you sign: three calls worth making

Arizona’s incentive landscape moves on multiple timelines at once — state tax law, ACC rate-case decisions, and individual utility export-rate resets each fall (APS in September, TEP in October) — so a number that was accurate in January can be stale by October.

Start with DSIRE (dsireusa.org) for the current, regularly updated status of the state credit, the TPT exemption, and the property tax exemption. Then go straight to your utility: APS and TEP publish their Resource Comparison Proxy rate schedules directly, and SRP publishes its own Customer Generation plan terms — all of it subject to change at the next annual reset. Before you assume the TPT exemption applies cleanly, confirm your contractor’s AZDOR registration status; it’s the exemption’s actual precondition, not a formality. And before you count on the $1,000 state credit, ask a tax professional two things: whether you or a prior owner already claimed it at this address, and how the expired federal credit changes your specific filing.

Arizona’s 2026 stack is real, but it’s smaller and more provider-dependent than a simple “30% off” pitch suggests. The $1,000 state credit, the two tax exemptions, and utility-specific net-billing rates are genuine savings — verifying the exact figures for your address, utility, and tax situation is what turns a rough estimate into a decision you can trust.