Evaluating a supplier for Foreign Entity of Concern (FEOC) risk means confirming whether the supplier is a prohibited foreign entity (PFE) or whether any of its manufactured product component (MPC) suppliers are PFEs. Skipping either of these can put your project's entire tax credit at risk.
Under current clean energy tax credit rules, a project can fail its FEOC eligibility not because of anything the developer did, but because of a supplier relationship that was never fully vetted. That risk sits with the developer and, later, with anyone who buys or finances the credit. The diligence must happen before the contract is signed, not after an audit letter arrives.
Why This Matters Before You Sign
FEOC is not a bonus adder. It is a baseline eligibility requirement. If a supplier provides too many manufactured product components (MPCs) from prohibited foreign entities (PFEs) or fails to validate its supply chain, the affected component's cost may not count toward eligible basis, and depending on how much of the project that supplier touched, the project's entire tax credit may be disqualified. Fixing this after the fact, once equipment is installed and the project is placed in service, is far harder than catching it during procurement.
Step 1: Confirm PFE Status
Start by determining whether the supplier is a PFE, not just where its factory sits. A supplier can be headquartered in an allied country and still be a PFE based on its parent entities or controlling interests.
- Request a current PFE disclosure or certification if the supplier is not publicly traded, not one from the last contract renewal.
- Require the supplier to sign a certification under penalties of perjury and complete a checklist documenting that it is not a PFE.
- Review the signed certification for accuracy and use online searches and databases to identify any readily accessible contradictory information.
Step 2: Trace Component-Level Sourcing
PFE status at the manufactured product level is not enough. Material assistance is measured at the component level, so a supplier that is not itself a PFE can still contribute disqualifying content if its sub-suppliers are PFEs.
- Request a bill of materials broken out to the component level, not a summary category.
- Ask for the material assistance cost ratio (MACR) calculation the supplier used, and check whether it was calculated at the project level or the product level against Notice 2026-15.
- Do not accept a single blanket compliance statement in place of component-level detail and additional certifications from the MPC suppliers if there is any reason to know they may be PFEs. General assurances alone may not provide sufficient support during an IRS examination without underlying documentation.
Step 3: Require Documented Chain of Custody
Once PFE status and sourcing check out, the diligence is not finished until it is documented in a form that will still make sense years later, when a tax equity investor, credit buyer or the IRS asks for proof.
- Get proof of delivery tied to the specific components delivered to validate that what was ordered matches what arrived on site and was installed.
- Confirm the certification references the applicable statutory tests and the reporting period it covers.
- Keep the underlying support, including invoices, country-of-origin documentation and sub-supplier attestations, not just the certification letter itself.
Red Flags That Should Stop a Deal
- A supplier that will not disclose the information needed to validate its PFE status beyond its immediate parent company.
- A bill of materials that groups components into broad categories instead of line items.
- A certification that predates the current contract or does not name the specific project.
- Reluctance to update documentation when a sub-supplier changes.
Building This into Your Diligence Process
The organizations that handle this well treat FEOC supplier evaluation as a standing procurement control, not a one-time compliance check bolted on before financial close. That means building PFE and sourcing verification into the vendor qualification process itself, so it is current by the time a project reaches diligence rather than reconstructed under deadline pressure.
Frequently Asked Questions
What is a prohibited foreign entity (PFE)?
A prohibited foreign entity is a supplier or entity that fails to meet FEOC ownership requirements, either as a specified foreign entity (SFE), based on ownership, or a foreign influenced entity (FIE), based on effective control. If a supplier is a PFE, its components generally cannot count toward a project's eligible tax credit basis.
What happens if I don't catch a FEOC issue until after the project is placed in service?
Disqualifying content discovered after the project is placed in service may affect credit eligibility or create recapture or disallowance risk, depending on the applicable facts and guidance for the affected components, and in some cases the full project. Recapture and disallowance exposure both depend on how the issue is discovered and documented, which is why pre-signing diligence matters more than after-the-fact correction.
Is a supplier's self-certification enough to rely on?
A signed certification is necessary but generally not sufficient on its own. It needs to be tied to the specific components and project at issue and supported by the underlying documentation a certification alone does not provide, such as country-of-origin records and sub-supplier attestations. You still have to meet the 'reason to know' standard.
Do I need to re-evaluate a supplier for every new project?
Yes. PFE status, sourcing, and sub-supplier relationships change over time, and a certification from a prior project does not establish compliance for a new one.
What's the difference between PFE status and the material assistance test?
PFE status looks at whether the supplier itself is a prohibited foreign entity. The material assistance test looks at the components themselves, measured through the material assistance cost ratio (MACR). A supplier can be compliant at the entity level and still fail the material assistance test, so both need to be checked independently.
Empact Technologies helps developers and investors verify supplier FEOC status and maintain audit-ready documentation through NexusIQ™, so diligence findings hold up years after a project closes.
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This is the first in a three-part FEOC supply chain series.
- What Does a Supplier Need to Prove FEOC Compliance?
- What Are the FEOC Supply Chain Tracing Requirements Under OBBBA?
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