IRA Safe Harbor Restored: A Four-Week Procurement Window

The IRA safe harbor is back, and the clock on it is short. On June 6, 2026, the U.S. District Court for the District of Columbia vacated IRS Notice 2025-42 in full, restoring the 5% rule that lets wind and solar projects prove they began construction in time to keep their tax credits. The ruling landed 28 days before those credits expire. For equipment buyers, that gap is the whole story.

Here is what the court actually did, why July 4 is a hard wall, and what the restored IRA safe harbor means for solar and wind equipment orders over the next four weeks.

What the Court Restored on June 6

In Oregon Environmental Council v. Internal Revenue Service, Judge Colleen Kollar-Kotelly held that the IRS acted “arbitrarily and capriciously” under the Administrative Procedure Act when it issued Notice 2025-42. She vacated the notice and sent the matter back to the agency.

Notice 2025-42 had removed the 5% cost threshold that developers use to lock in eligibility. In its place, the IRS wanted projects to show continuous physical work at the site. That is a far harder test to meet, and it stranded a pipeline of projects that had planned their financing around the older, simpler standard. The June 6 decision puts the original standard back in force.

The credits at stake are the 30% investment tax credit (48E ITC) and the production tax credit (45Y PTC). Both apply to wind and to solar PV projects above 1.5 MW.

The Beginning of Construction Test, in Plain Terms

“Beginning of construction” (BOC) is the line that decides whether a project keeps its credit. There are two long-standing ways to cross it. One is the physical work test, which requires meaningful on-site or off-site construction. The other is the 5% safe harbor, which a developer clears by paying or incurring at least 5% of the total project cost.

The 5% path is the one most developers rely on, because writing a purchase order is cleaner to document than proving the character and continuity of physical work. That is exactly why removing it stalled so many projects, and why restoring it matters for procurement specifically. To clear the 5% threshold, a developer has to commit real money to real equipment. Transformers, switchgear, inverters, racking, and collection cable are the line items that get a project over the bar.

In other words, the IRA safe harbor is a procurement mechanism wearing a tax-law label. Qualifying for the credit and ordering equipment are the same action.

Why July 4 Is a Hard Wall

The reason this ruling carries urgency comes from a second piece of law. The One Big Beautiful Bill Act set a cutoff for 45Y and 48E: projects keep the credits only if they begin construction before July 4, 2026. After that date, new wind and solar projects lose access to the technology-neutral credits unless Congress acts again.

Stack the two together and the picture is clear. OBBBA built the July 4 wall. IRS Notice 2025-42 tried to take away the ladder most developers use to get over it. The June 6 ruling put the ladder back. Developers now have a narrow window to use the 5% commitment, clear the BOC test, and lock in their credit before the wall goes up.

This is the distinction between the IRA safe harbor ruling and a credit extension. The court did not extend anything. It restored access to a qualifying mechanism that has to be used before July 4. The deadline did not move.

Which Projects Re-Qualify Under the 5% Safe Harbor

The projects most affected are the ones that were sitting on the sidelines waiting for legal clarity: utility-scale solar above 1.5 MW and wind developments that had paused procurement when the continuous-work standard appeared. Solar installations already fell sharply in 2025 as policy uncertainty built, so a meaningful share of this pipeline was deferred rather than cancelled.

Those deferred projects are the ones reactivating now. A developer that re-qualifies under the restored safe harbor moves to procurement immediately, because the 5% commitment and the equipment order are the same transaction. The RFPs that went quiet are coming back live, and they are coming back with a date on them.

The Solar and Wind Equipment Procurement Window

The near-term demand concentrates in a few categories, all on the medium-voltage and collection side of a renewable project:

• Pad-mount transformers and inverter step-up units
• Medium-voltage switchgear and underground collection cable
• Wind substation transformers and associated protection equipment

These are the same categories that were already carrying long lead times before the ruling added a wave of compressed orders on top. A surge of BOC-driven purchase orders in June and early July pulls from manufacturers who are already booked against data center and transmission demand. The collection-system equipment that clears the 5% threshold is not sitting on a shelf.

That is the part procurement teams should sit with. The ruling does not create new manufacturing capacity. It adds a burst of urgent buyers to an order book that was already full. Buyers with confirmed supply agreements are positioned very differently from buyers quoting against open inventory.

What Distributors Should Do Before the Window Closes

Three things matter in the next four weeks. First, treat June as a surge period for solar and wind collection equipment, not a normal order cadence. Second, expect previously stalled RFPs from EPC contractors and developers to reactivate on short notice, with BOC documentation pressure behind them. Third, recognize that the buyers placing orders now are competing for the same constrained transformer and switchgear capacity as the data center and transmission buildouts already in motion.

The exact lead-time exposure by category, the manufacturers with open allocation, and the sourcing rules that govern credit eligibility are where the detail lives. DistroForge tracks that detail for buyers who need to act inside windows like this one.

After July 4

Once the deadline passes, the framework resets. New wind and solar projects lose the technology-neutral credits unless Congress moves, and there is an active legislative effort to do exactly that. For now, the practical read is simple. The IRA safe harbor window is a June and early July event, and the equipment orders that define it are being written right now.

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Related Reading

• Three Signals Compressing Equipment Procurement Before July 4
• The American Energy Dominance Act and 45Y/48E Equipment Demand
• OBBBA Sourcing Rules and Utility Equipment Demand

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