30 Days Left: What the OBBBA July 4 Deadline Means for Your Project
- 1 day ago
- 5 min read
The OBBBA has been law for eleven months. Most of the market spent the first few of those months figuring out which projects still made sense. That phase is over. What's left is execution, and 30 days is a short window when the thing standing between your project and a tax credit is physical steel in the ground.
This is a segment-by-segment read on what's still achievable before July 4, what the rules actually require, and where the engineering work sits in all of it.
A quick orientation on the two paths
Every solar and wind project currently in development faces one of two credit scenarios under the OBBBA, and which one applies depends entirely on whether physical construction starts before July 4.
Begin construction by July 4, 2026 and you lock in a four-year runway to place the project in service, meaning you have until end of 2030 to complete it and still qualify for the 48E ITC. This is the path that makes most active pipeline projects viable.
Miss July 4 and your project must be fully placed in service by December 31, 2027 to qualify for any credit at all. That's an 18-month window from deadline to operational facility. For projects still in permitting, interconnection, or early-stage engineering, that timeline isn't realistic.
The other thing that changed, and this matters enormously for what "starting construction" actually means, is how you prove it. IRS Notice 2025-42 eliminated the 5% safe harbor for solar facilities above 1.5 MW AC. Spending 5% of project costs no longer qualifies as a construction start. The physical work test is now the only path for larger projects: actual physical work of a significant nature, either on-site or through off-site manufacturing of custom components under a binding written contract. Planning, permitting, interconnection applications, and unsigned EPC agreements don't count.
That's the frame. Now, segment by segment.
C&I Solar
This is the segment most directly in the window. A commercial solar project with permits in hand and an EPC mobilized can satisfy the physical work test before July 4. Driving piles, installing racking, pouring foundations - any of these, documented and tied to a binding contract, establishes the construction start.
The risk isn't awareness of the deadline. It's the assumption that "engineering is progressing" means construction has started. It doesn't. A completed structural design package, a finalized electrical design, a submitted interconnection application - none of these are physical work. They're prerequisites for physical work. Teams that have confused the two are running out of time to correct it.
The July 4 path is still viable for C&I projects at an advanced stage of development. Missing July 4 and racing to placed-in-service by December 2027 is realistic only for projects already well into construction. It is not a fallback for projects still in design.
Utility-Scale and Community Solar
The same rules apply, and the same two paths exist. But the practical reality is harder.
Utility-scale projects in transmission-level interconnection queues are working against a system that, as of end-2023, had 2,600 GW of proposed capacity waiting for grid access. Typical wait times in major markets run to five years. A project with site control and an interconnection position but no physical work underway is not close to qualifying under the July 4 path. It needs steel moving in the next 30 days or it needs to be evaluated honestly for the December 2027 placed-in-service window.
Community solar projects sit in the same policy frame as utility-scale for this purpose. Most are well above the 1.5 MW threshold where the 5% safe harbor exception applies. They need the physical work test. They need construction underway.
There's a second constraint worth naming here. Engineering bandwidth, not just permitting and procurement has become a gating factor across the utility-scale market. Projects that waited to finalize detailed engineering before mobilizing construction are finding that the two timelines don't compress cleanly under 30 days.
BESS
Standalone battery storage operates under a different credit structure. The July 4 hard deadline doesn't apply. The 48E ITC for energy storage technology phases out on a longer timeline: construction must begin before end of 2033 for full credit value, with a phased reduction after that. A co-located BESS at a solar facility follows solar rules for the solar component and storage rules for the storage component. The asymmetry is real and has design sequencing implications.
The risk profile for BESS in 2026 isn't the construction deadline. It's FEOC compliance. For projects beginning construction in 2026, at least 55% of project costs must come from non-prohibited foreign entity sources. That threshold rises annually. Getting to a bankable FEOC compliance position requires supply chain documentation and engineering-level component tracking.
Residential Solar
The 25D credit ended December 31, 2025. Homeowners who purchase and own their systems directly have no federal tax credit available in 2026.
The installer-side story is TPO. Leases and PPAs place the system ownership with a financing company, which claims the 48E commercial credit. That credit runs through end of 2027 with the same construction-start logic applying to TPO pipeline projects as to C&I and utility-scale. TPO providers who haven't begun physical work on pipeline projects before July 4 face the same December 2027 problem as everyone else.
FEOC sourcing requirements apply to TPO installations claiming 48E. For 2026, 40% of manufactured product value must come from non-FEOC sources.
EVCS
The 30C commercial EV charging credit expires June 30, 2026 - 26 days from now. Projects placed in service by that date qualify for 30% up to $100,000 per port for commercial installations. This is a placed-in-service deadline, not a construction-start deadline. The charger has to be purchased, installed, and operational by June 30 to qualify. A signed contract or a unit sitting in a warehouse doesn't count.
For projects in permitting or early procurement right now, the window is extremely tight. The realistic question isn't whether to start, but whether the remaining steps can physically complete in under four weeks given utility coordination timelines, inspection schedules, and equipment delivery.
After June 30, state programs, utility incentive structures, and NEVI-adjacent funding become the primary levers for commercial EVCS economics. Projects that miss the deadline should be re-evaluated against that financing landscape before proceeding.
The power delivery dimension
Substations and interconnection infrastructure don't have their own OBBBA credit structure. They're not generation assets. But they sit in the critical path of every project that does face the deadline.
Substation design, protection coordination studies, and power system studies have to be complete before physical work of any significance can begin at the generation level. They're upstream of the construction start, which means they're upstream of the deadline. For teams treating these as parallel workstreams rather than prerequisites, the sequencing problem shows up at the worst possible time.
Microgrid projects with solar and storage components face the same split as co-located systems. The solar portion has a July 4 clock. The storage portion doesn't. Engineering the two together while respecting that asymmetry is not a trivial design exercise.
What the deadline actually tests
The projects that won't make it aren't the ones that didn't know July 4 was coming. They're the ones where the development team understood the deadline in policy terms but didn't trace it back through the engineering sequence to the physical reality on site.
The physical work test is named accurately. Physical work. On site or under a binding contract for custom manufactured components. Everything before that: studies, permits, applications, design packages is table stakes and not credit-qualifying activity.
If you're looking at your project timeline and trying to work out where you actually stand, that's the conversation worth having now.
Reach out to Illumine-i here.
Comments