Key Federal Deadlines for the 30% ITC and FEOC Compliance (2025–2027)
The next two years represent one of the most time‑sensitive periods in the history of U.S. solar incentives. With the Investment Tax Credit (ITC) at 30% and Foreign Entity of Concern (FEOC) rules taking effect, solar project developers face several critical deadlines that determine whether a project secures full federal incentives—or loses them entirely.
This guide breaks down the major deadlines solar developers must understand between 2025 and 2027, based on IRS safe‑harbor provisions, updated Treasury guidance, and the One Big Beautiful Bill Act (OBBBA).
1. December 31, 2025 — Critical FEOC Safe Harbor Deadline (Now Passed)
As of today, the IRS Safe Harbor window for avoiding FEOC (Foreign Entity of Concern) sourcing rules is officially closed. Projects needed to begin construction by December 31, 2025, to lock in pre‑2026 sourcing requirements and preserve ITC eligibility under the simpler 2025 rules. Industry guidance emphasized that Safe Harboring before FEOC implementation insulated projects from the stricter documentation and supply‑chain restrictions now in effect.
Because this date has passed, any new project initiating construction in 2026 or later must comply with full FEOC standards, which require meeting specific non‑PFE (prohibited foreign entity) sourcing thresholds beginning this year.
2. January 1, 2026 — FEOC Rules Take Full Effect
Beginning in tax years after January 1, 2026, solar projects that start construction must comply with FEOC standards. These rules restrict the percentage of equipment or materials sourced from prohibited foreign entities (e.g., China, Russia, Iran, North Korea).
FEOC thresholds begin in 2026 and increase over time, with at least 40% of manufactured components required to come from non‑PFE sources for solar projects.
3. July 4, 2026 — Construction Safe Harbor Cutoff for Full 30% ITC
Projects smaller than 1.5 MW must “Safe Harbor” to remain eligible for the full 30% credit and related bonuses.
Projects larger than 1.5 MW must begin construction to remain eligible for the full 30% credit and related bonuses.
This date is considered the most important threshold for developers planning beyond 2027 because projects starting before this date qualify for the four‑year Continuity Safe Harbor, giving them until as late as 2030 to be placed in service.
4. December 31, 2027 — Final Placed‑in‑Service Deadline for Non‑Safe‑Harbored Projects
For projects that did not meet the July 4, 2026 construction start deadline, December 31, 2027 is the final opportunity to be placed in service and still secure the ITC.
Multiple industry advisories confirm that after December 31, 2027, new solar projects will no longer qualify for the Section 48E ITC, barring future legislation.
This creates a hard drop‑off:
- If construction didn’t begin (1.5 MW+) or Safe Harbor (less than 1.5 MW) by July 4, 2026: Project must be operational by the end of 2027.
- If construction began by July 4, 2026: Project maintains the four‑year completion window (potentially into 2030).
What Solar Project Developers Should Do Now
- Evaluate whether you can begin construction before Dec 31, 2025. This is the only way to 100% avoid FEOC compliance and lock in the 30% ITC under current rules.
- If not, safe harbor(less than 1.5 MW) or begin construction (1.5 MW or larger) before July 4, 2026. This preserves the full credit and provides an extended completion timeline.
- When starting after Jan 1, 2026, audit your equipment supply chain. You will need to document compliance with FEOC sourcing requirements (40%+ non‑PFE components).
- Avoid the December 2027 cliff. If you’re planning to build in 2027, be ready to hit the placed‑in‑service deadline.
The next 24 months represent the tightest regulatory window solar developers have ever faced. Missing any of these statutory dates can result in losing the 30% ITC—or losing ITC eligibility altogether.
