Pinnacle West Q2 2026 Preview: Arizona's Load Boom vs. a Possible EPS Miss

Pinnacle West's Aug. 4 report lands at the center of a demand-versus-earnings debate

Pinnacle West reports before the market opens on Aug. 4, and the setup is unusually straightforward. The bull case is that the utility is riding a real demand wave from Arizona's economic and industrial expansion. The bear case is that a heavier capital base, higher interest, and more depreciation may still cap earnings despite that growth. That is why this looks more like a verdict date than a routine quarterly check.

Consensus sits near $1.49 per share on about $1.40 billion in revenue and roughly 9,722.3 gigawatt-hour of electric sales. Those inputs look more like a growth utility, especially with Arizona demand being supported by robust Arizona economic expansion and customer growth. At the same time, the setup still carries earnings pressure, because Q2 2026 EPS actually fell to $1.43 from $1.58 a year earlier. In other words, demand looks strong, but reported profitability still did not keep pace.

That tension matters more because Pinnacle West posted an outsized earnings surprise in the prior report. So investors are not only watching whether EPS clears expectations; they are also watching whether Arizona's load growth can start to translate into more confidence around full-year earnings.

Arizona demand is the clear positive, and the trends are tangible

Weather-normalized sales and customer growth are holding up

The bullish case starts with measurable usage. In the first quarter, Pinnacle West reported weather-normalized sales growth of 9.4% alongside 2.2% customer growth. In Q2, the trend held again, with 9.6% weather-normalized retail electricity sales growth and 2.1% customer growth. That points to real load growth across residential, commercial, and industrial customers rather than a one-season anomaly.

For a regulated utility, sustained sales growth matters because it can support additional grid investment and, over time, a larger rate base. The key point is not that current earnings automatically jump when usage rises. It is that the underlying earnings platform can become larger if that demand proves durable.

TSMC's build-out strengthens the long-term load outlook

The strongest support for the bull case is the scale of industrial demand. TSMC's Arizona commitment now totals $265 billion, with plans for up to 12 fabs and a major R&D campus. Management also said it expects to include TSMC's full intended build-out and updated ramp schedule in the October integrated resource plan. That moves the load story from a broad theme to a more concrete planning input.

Unlike weather-driven usage, semiconductor facilities tend to create a steadier, higher baseline load. If that build-out ramps as expected, it can strengthen the case for sustained investment and longer-term revenue recovery through the regulatory process.

The earnings constraint is still interest, depreciation, and timing

Stronger sales still came with weaker Q2 EPS

The same Q2 results that showed growth also showed the current constraint on profits: operating revenues rose to $1.46 billion, but EPS was $1.43, down from $1.58 a year earlier. Management tied that decline to higher interest expense, increased depreciation and amortization, along with lower transmission revenue, which more than offset favorable weather and sales growth.

That is the core issue for investors. A utility can see higher demand and still report weaker earnings if the costs of supporting that demand arrive before the returns are fully reflected in approved rates. A larger asset base also tends to increase depreciation, and financing that growth can lift interest expense too.

The call needs to show a clearer bridge from spending to earnings

Pinnacle West is also planning additional capital intensity, including the Cholla conversion, which could require up to $440 million of incremental capital spending, primarily in 2027–2028. That does not break the bullish demand story, but it does mean investors will want a clearer timeline for how new spending turns into recoverable returns.

For the stock, a simple EPS beat may not be enough if the underlying question is whether higher interest and depreciation are becoming a persistent earnings drag. What likely matters more is whether management reinforces the full-year framework and keeps the outlook credible despite near-term pressure.

What could move the stock on the call

Investors already know Arizona demand is strong from 9.6% weather-normalized sales growth, 2.1% customer growth, and last quarter's higher transmission revenues. So the bigger question is whether management can improve confidence around earnings timing before the market turns to the October resource plan.

The company has said it expects to finish at the top end of the range within its $4.55–$4.75 2026 EPS guidance. Preserving that message would likely matter more for upside than a narrow beat on its own.

Key things to watch

• Weather-normalized sales: Does management still sound confident after 9.6% weather-normalized retail electricity sales growth?
• Customer growth: Does the 2.1% trend look durable rather than isolated to one quarter?
• Transmission revenue: Was last quarter's higher transmission revenues tailwind sustainable, or more isolated?
• Interest and depreciation: Are those costs framed as temporary growth friction or a more lasting drag on EPS?
• Capital plan visibility: Does management connect new load growth to a visible path for regulated asset growth and return recovery, including the up to $440 million of incremental capital spending at Cholla?