Commercial Solar After July 4, 2026: What the 2027 Deadline Means for Your Project

For most of the last three years, the federal tax credit for commercial solar came with a comfortable runway. That changed in 2025. The July 4, 2026 date to begin construction has now passed, and any commercial or agricultural project that starts today falls under a different rule: it has to be placed in service by December 31, 2027 to claim the credit.

That sounds like plenty of time. For a lot of projects, it is less than it looks. Here is what the deadline means in practice, and how to work backward from it.

What Changed

The One Big Beautiful Bill Act, signed July 4, 2025, kept the 30% clean electricity investment credit (Section 48E) for business solar but shortened its life. Projects that began construction by July 4, 2026 generally get about four years to finish, as long as construction keeps moving. Everything else has a hard stop: the system must be operating and placed in service by the end of 2027.

A few things did not change:

• Systems under 1 MW AC still earn the full 30% without prevailing wage and apprenticeship requirements.
• Five-year MACRS depreciation is still available for systems that qualify for the credit, and 100% bonus depreciation is back.
• Energy community and domestic content bonuses can still add to the base credit where a project qualifies.

What is new is the calendar pressure and a set of equipment sourcing rules, covered below.

Placed in Service Is Not the Same as Signed

The credit depends on when the system is placed in service, which generally means installed, inspected, and ready and available to produce power. That usually includes connection to the grid. Signing a contract, paying a deposit, or having panels delivered to the site does not count. A system that is fully built but still waiting on the utility at the end of December 2027 can miss the deadline.

That is the part buyers tend to underestimate. The installation itself is often the shortest phase of a commercial project. The slower steps usually happen before a crew ever shows up.

Working Backward From December 2027

Every site is different, but a typical commercial or agricultural project in Arkansas moves through these stages:

1. Utility data and design. Twelve months of bills, a site visit, a production model, and a proposal. This takes a few weeks if the owner has the data ready.
2. Internal approval. Board votes, lender approval, or a review by your tax advisor. This is often the longest step and the one an installer controls least.
3. Engineering and permitting. Stamped drawings, structural review for rooftop systems, and local permits.
4. Utility interconnection. The application and review with Entergy Arkansas, SWEPCO, or your electric cooperative. Larger systems can trigger additional study.
5. Equipment procurement. Lead times on inverters, transformers, and switchgear vary, and the new sourcing rules narrow the options.
6. Construction and commissioning. Installation, inspection, and the utility's permission to operate.

Add those up and a project that signs in the fall of 2027 is taking a real risk. Our practical advice is to have a signed contract and an interconnection application in by mid-2027 at the latest, and earlier for larger systems or sites that need a new service or transformer. If your organization needs two board cycles to approve a capital project, count those months too.

The New Equipment Sourcing Rules

Projects that begin construction after December 31, 2025 also have to meet the new prohibited foreign entity rules. In plain terms, only a limited share of the cost of a project's components can come from companies tied to certain foreign countries of concern, mainly China, and that share gets smaller each year. The IRS laid out the first rules for measuring this in Notice 2026-15. A project that fails the test does not get a reduced credit. It gets no credit.

Two practical points follow. First, the cheapest panel or inverter on a quote is no longer automatically a good choice. Second, your installer should be able to show where the major components come from. We document supply chain sourcing in every commercial proposal so your tax advisor can review it before you sign. If a competing quote cannot tell you where its equipment is made, ask why.

Does Solar Still Make Sense After 2027?

It is a fair question, and the honest answer is that it depends on the site. Without the credit, a project has to stand on energy savings alone, and depreciation may be slower as well. Strong daytime load, high utility spend, and a system sized to actual usage can still produce workable economics for some Arkansas businesses. But most projects look meaningfully better with the credit than without it, which is why the 2027 deadline deserves attention now rather than next summer.

If you are on the fence, the useful move is to get a real proposal built on your bills. That tells you what the project looks like with the credit, what it would look like without it, and how much time you actually have to decide.

A Short Checklist

• Pull twelve months of utility bills for every meter the system might serve.
• Ask your tax advisor whether your business can use the credit and depreciation, and in which tax years.
• Map out your internal approval process and how long it usually takes.
• Ask any installer for a written schedule that ends in a placed-in-service date, not an installation date.
• Ask where the panels, inverters, and racking are made.

This post is general information, not tax advice. Eligibility for the credit depends on your specific facts, and Treasury guidance on the sourcing rules is still developing, so review your project with a qualified tax professional.

Want to know whether your facility can realistically make the 2027 cutoff? Send us a year of utility bills. We will build the schedule backward from December 31, 2027 and show you where the tight spots are.