What Is a Foreign Entity of Concern (FEOC), and Why It Now Decides Your 30% Tax Credit

A plain-English guide to the rule that ties your Section 48E credit to where your equipment comes from.

Featuring Caleb Quaid, President, Clean Energy Help. Adapted from the SunSmart Engineering × Clean Energy Help × FlaSEIA panel, Commercial Solar in 2026. Watch the clip: "07 - What Is a Foreign Entity of Concern (FEOC).mp4".

FEOC stands for Foreign Entity of Concern, and if you price commercial solar in 2026 it now sits between you and your project's 30% tax credit. The rule came out of the One Big Beautiful Bill Act (OBBBA), signed July 4, 2025. Here is what it means in language a contractor can actually use.

What the rule covers

FEOC is about where your equipment comes from and who could influence its supply chain. Caleb Quaid summed it up on the panel:

"One of the really big things that came out of the One Big Beautiful Bill was the creation of FEOC, Foreign Entity of Concern. Generally speaking, there are four countries: China, North Korea, Russia, and Iran, labeled foreign entities of concern. Only really one of those, China, makes a bunch of solar equipment, so it's essentially a rule that says you can't have too much of the stuff coming either manufactured in China, or where China can influence the supply chain to turn it off."

Four countries are flagged in the statute: China, North Korea, Russia, and Iran. For solar, though, only China is the one you'll deal with. North Korea, Russia, and Iran aren't supplying the cells, modules, and inverters going on American rooftops. China is. So in practice FEOC is a China rule.

Why it became unavoidable

FEOC went from policy footnote to something you handle on every job because it's now tied to the money.

To claim the Section 48E Clean Electricity Investment Tax Credit (ITC) at the full 30%, your project has to document FEOC compliance as it relates to "material assistance." Caleb spelled out the stakes:

"The big reason it matters is because in order to get the Section 48E tax credit for 30%, your project needs to document compliance with FEOC as it relates to material assistance. You need to meet certain requirements, document those, and the taxpayer needs to certify compliance in order to get that 30%."

Believing your equipment qualifies isn't enough. You have to meet the requirements, keep records that prove it, and have the taxpayer formally certify the project is compliant. No certification, no 30%.

Material assistance is the prohibited foreign content in your system, the share that traces back to one of those entities of concern. FEOC caps how much of it you can carry and still qualify.

The thinking behind it

Caleb framed the rule as a national-resilience play rather than a punishment for any single panel:

"I think this is largely a trade-war scenario: if we stop doing business with China or these other countries, could they stop us from being able to manufacture and procure these projects? Would they have that influence over us?"

The concern is whether a foreign adversary could one day cut off the supply chain the U.S. depends on to build energy infrastructure. The tax credit is the lever being used to pull sourcing and manufacturing away from that risk.

How compliance gets measured

There's a real metric here, called the Material Assistance Cost Ratio (MACR). It measures how much of your project's cost is non-FEOC content. For 2026 solar projects you have to clear a 40% non-FEOC threshold. Energy storage sits higher at 55%, and the bar steps up over time, to roughly 45% for solar starting in 2027.

You don't have to trace every screw and diode by hand. Both FEOC and domestic content can be documented using a published IRS safe-harbor table, referenced in the webinar as Notice 2025-08, that assigns cost percentages to system components such as the cell or module, the inverter, and the racking. That lets you calculate where a project stands. We walk through the MACR math in its own article. The point here is that there's a number, and your project has to beat it.

One caveat worth carrying with you: as of the June 2026 webinar, FEOC guidance was still interim, the safe-harbor litigation was under appeal, and new IRS guidance was expected. Treat every threshold and date above as current as of 2026 and subject to change.

Key takeaways

• FEOC (Foreign Entity of Concern) came from the One Big Beautiful Bill Act. Four countries are flagged, but only China matters for solar.
• It limits the prohibited foreign content (your material assistance) in a project, covering both what's made in China and what China could influence.
• The 30% Section 48E ITC now depends on it. You meet the requirements, document them, and the taxpayer certifies compliance.
• The reasoning is supply-chain resilience: could an adversary cut off the equipment the U.S. relies on?
• Compliance runs through the Material Assistance Cost Ratio (MACR): 40% non-FEOC for 2026 solar, 55% for storage, climbing in later years.
• The rules were still interim and evolving in June 2026. Confirm the current numbers before you commit.

How SunSmart Engineering can help

FEOC adds a documentation layer that most contractors have never had to manage. We help you build plan sets and project records that line up with the safe-harbor framework, so the supporting detail is already in place when the taxpayer has to certify. As a full-service solar and storage engineering firm based in Florida and working nationwide, we'll help you design and document projects that protect that 30% credit. Visit sunsmartengineering.com or call 866-786-8655.

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Educational information only, not tax, legal, or engineering advice. Rules referenced (credits, FEOC, safe-harbor litigation, and the July 4, 2026 / December 31, 2027 dates) were current as of the June 2026 webinar and continue to change. Confirm current requirements with a qualified professional before acting.