Case Studies
Case Study: Structuring Clean Energy Projects to Maximize Tax Credits under U.S. PFE Rules
A deep dive into how a solar developer structured a project to comply with PFE restrictions and retain eligibility for clean energy credits.
By NomadicTax Research Team • 5-8 min read • March 28, 2026
## Background: Project Alpha
Project Alpha is a solar electricity facility developed by GreenTech LLC, intended for Section 45Y clean electricity production credits. The facility construction began January 2026. GreenTech’s component supplier (SolarCells Inc.) is headquartered in a country that could be designated a PFE. A portion of the solar panel cells are sourced from SolarCells Inc., while inverters are U.S.-manufactured.
## Challenge: PFE Material Assistance
According to IRS guidance under Notice 2026-15, material assistance from PFEs disqualifies the facility if its **Material Assistance Cost Ratio (MACR)** exceeds allowable safe harbor thresholds. Project Alpha must assess what percentage of procurement costs relate to PFEs.([irs.gov](https://www.irs.gov/irb/2026-11_IRB?utm_source=openai))
## Strategic Solution: Optimization Steps
1. **Vendor restructuring:** GreenTech adds a U.S. intermediary between SolarCells Inc. and its procurement process to drop direct PFE involvement.
2. **Contract changes:** SolarCells Inc. agrees to supply through a joint U.S. company (non-PFE) that meets safe harbor requirements for ownership and effective control.
3. **Cost adjustment:** GreenTech shifts more cost share toward U.S. manufactured components (inverters, frameworks) to reduce MACR below the safe harbor threshold.
4. **Documentation strategy:** Tight record-keeping: training for procurement and accounting to track supplier country of origin, cost allocations, ownership disclosures.
## Outcome & Lessons Learned
| Metric | Before Restructure | After Restructure |
|--------|---------------------|--------------------|
| Estimated MACR | ~35% (over safe harbor limit) | ~18% (within safe harbor safe range) |
| Credit Eligibility | Likely disqualified if final regs adopt interim thresholds | Qualifies under interim safe harbor rules ([irs.gov](https://www.irs.gov/newsroom/treasury-irs-provide-guidance-for-certain-energy-tax-credits-regarding-material-assistance-provided-by-prohibited-foreign-entities-under-the-one-big-beautiful-bill?utm_source=openai)) |
| Cost-increment | Slight increase in U.S. content sourcing costs, but offset by credit value |
## Actionable Insights for Developers & Advisors
- Early in project cycle, map out supply chain **risks of PFEs** and avoid or mitigate sources.
- Where possible, **negotiate with suppliers** to maintain ownership, licensing, control arrangements favorable under IRS PFE rules.
- Leverage the interim safe harbor until final regulations are published, but avoid assumptions — flexible structuring offers options.
- Keep all documents: vendor agreements, certificates, invoices, ownership statements, cost detail — auditors will dig here.
## Final Thoughts
Project Alpha demonstrates that with **strategic sourcing, vendor relationships, and clear cost allocation**, clean energy projects can navigate complex PFE restrictions while preserving valuable tax benefits. For any clean energy project in 2026+, begin with compliance first, then optimize for credit value.