Surging Idaho load, heavy buildout risk
- IDACORP is mostly Idaho Power, a regulated utility that earns by selling electricity and recovering approved costs in rates.
- The core upside is load growth, with the 2025 IRP using an 8.3% annual retail sales growth forecast for the next five years.
- Industrial demand is hitting the bottom line, with Q2 2026 industrial revenues up 17% year over year.
- The company plans $6.3 billion to $7.2 billion of capital spending from 2026 through 2030, which can grow rate base but strains execution.
- The IPUC approved the Micron Fab 1 contract, but a new July lawsuit against the B2H transmission line adds execution risk.
A faster Idaho needs more power
IDACORP is a simple story with a hard task. Idaho Power serves a fast-growing service area, and large industrial users are making the load forecast much bigger. The 2025 IRP uses an 8.3% annual retail sales growth forecast for the next five years, far above prior planning cycles.
The bull case is that this secular growth is finally turning into a larger rate base and immediate revenue. Q2 2026 industrial revenues surged 17% year over year, and a new large contract reporting line added $6.5 million to operating income. The IPUC approved the Micron Fab 1 Energy Sales Agreement in May 2026, and the company filed an agreement for Chobani in June.
The bear case is still execution. The capital plan is $6.3 billion to $7.2 billion for 2026 through 2030. That is a lot for a mid-sized utility. The July 2026 federal lawsuit by Malheur Mining Company against the B2H transmission line adds a new hurdle to a critical project, showing that permitting and legal challenges can delay timelines.
The newest data supports the demand story but not a free pass on valuation. Management is still negotiating the contract for Micron's second fab, and the November IRP update will likely show even higher loads. The view stays cautious because the stock already asks investors to trust a large and complex buildout cycle.
Regulated wires, weather-linked power
IDACORP is a holding company. Nearly all of the business is Idaho Power, which generates, buys, transmits, and distributes electricity. It sells power to residential, commercial, industrial, and irrigation customers, plus some wholesale energy and transmission service.
Rates are set by regulators, mainly the Idaho Public Utilities Commission, the Public Utility Commission of Oregon, and FERC. The model works when Idaho Power spends on approved assets, places them in service, and then gets rates that recover costs plus a fair return. It breaks when spending rises faster than rate recovery.
Hydropower is a major swing factor. In 2025, hydropower supplied 52% of Idaho Power's system generation. Good water years lower fuel and purchased power needs. Dry years can force more gas generation or market purchases, even though power cost mechanisms reduce part of the earnings hit.
The Oregon business is set to shrink. Idaho Power signed a definitive agreement on February 13, 2026 to sell its Oregon electric distribution business and related assets to OTEC. If it closes, IDACORP becomes even more tied to Idaho growth and Idaho regulation.
Power demand by customer type
Residential electricity
Residential customers are the largest retail revenue source. Demand is tied to customer growth, summer cooling, and winter heating.
Commercial electricity
Commercial load comes from offices, retail, health care, government, education, and technology customers. It helps anchor the system.
Industrial electricity
Industrial load is the key growth engine. Q2 2026 industrial revenues surged 17% year over year as large customers began to ramp up.
Irrigation electricity
Irrigation customers use power to run pumps during the growing season. This line can move with precipitation, crop conditions, and summer weather.
Wholesale energy and transmission
Idaho Power sells excess energy and provides transmission service when conditions allow. Results depend on available generation, market prices, and grid capacity.
New generation and storage
New solar, gas, storage, and transmission projects are needed to serve faster load growth. They can expand earnings if approved and built at reasonable cost.
Retail mix by customer class
Mix is based on 2025 retail revenues by customer type from IDACORP's 2025 Form 10-K. Shares exclude the separate deferred HCC relicensing revenue line, so they show the operating customer mix rather than total company revenue.
What could break the plan
Regulatory lag on a larger buildout
High impact · Medium oddsIdaho Power must spend before it can fully earn on many assets. If the IPUC or other regulators delay recovery, reduce requested returns, or reject costs as not prudent, earnings can trail the capital plan. This risk matters more now because planned capital spending is $6.3 billion to $7.2 billion from 2026 through 2030.
Transmission projects face legal risks
High impact · Medium oddsB2H, GWW, and SWIP-N are central to bringing new resources onto the grid. In July 2026, Malheur Mining Company filed a federal lawsuit seeking injunctive relief against the B2H project. Legal challenges, permitting delays, and construction costs can block new generation even if demand keeps rising.
Generation approvals arrive late
High impact · Medium oddsThe company has approvals for an 80 MW solar PPA and 167 MW of gas capacity, but it also has pending requests and bid 8 self-build projects into the 2032 RFP. If those projects are delayed, rejected, or repriced, Idaho Power may need more market purchases or emergency resources.
Industrial demand contracts fall short
Medium impact · Medium oddsLarge industrial customers are a major reason the load forecast has jumped. While the first Micron fab contract was approved, management is still negotiating the Energy Sales Agreement for Micron's second fab. If the agreement is delayed, smaller than expected, or less protective, the growth case gets less certain.
Water, wildfire, and power cost swings
Medium impact · Medium oddsHydropower supplied 52% of system generation in 2025, so water conditions matter. Dry years can raise reliance on natural gas and purchased power. Wildfire mitigation also adds spending, and not all timing risk is removed by cost recovery tools.
Funding pressure from heavy capital needs
Medium impact · Medium oddsA multi-year buildout can require more debt or equity. Higher debt costs can hurt earnings before new assets are fully earning in rates. A low valuation score also means investors should be careful about paying too much for a regulated growth story.
In one breath
What does IDACORP actually do?
IDACORP owns Idaho Power. Idaho Power is a regulated electric utility that sells electricity, owns generation, and runs transmission and distribution assets in Idaho and eastern Oregon.
Why is Micron important to IDACORP?
Micron is part of the large industrial demand growth story in Idaho Power's service area. The IPUC approved the Energy Sales Agreement for Micron's first fab in May 2026, and management is still negotiating the agreement for a second fab.
Is IDACORP a growth stock or a utility income stock?
It is still a regulated utility, but its load growth and capital plan are unusually large for that category. The tradeoff is clear: more growth potential, but more project, funding, and regulatory risk.
What is the main thing to watch over the next year?
Watch whether regulators approve the 2032 RFP self-build bids, how the Malheur Mining lawsuit affects the B2H transmission line, and whether Micron's second fab contract gets signed.
Sources and research notes
This page combines Finn's company research with public filings and other cited materials. The thesis is reviewed when material company information changes; Finn Scores use the latest available scoring data.
- Thesis reviewed
- September 13, 2026
- Score data
- September 27, 2026
- Reviewed by
- Shivam Bharuka
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