ONE PROBLEM, IN DETAIL

SOLAR: THE OBBBA CLIFF

QUICK ANSWER

This page covers one problem. The full picture for this trade, including the other places margin leaks, is on the solar operating system page.

BY JOSH LUEBKERPublished 2026-08-06Updated 2026-08-06

WHAT BREAKS

WHERE THE MONEY GOES.

The OBBBA cliff (the deadline that just passed, and the one still coming)

The One Big Beautiful Bill Act (signed July 4, 2025) rewrote solar's economics twice over. Residential: the Section 25D homeowner credit expired December 31, 2025; residential installers lost the federal incentive entirely. Commercial: Section 48E's 30 percent ITC now runs on two paths only: (1) projects that BEGAN construction by July 4, 2026 keep the credit with a roughly four-year continuity window (into 2030), or (2) projects that missed the start deadline must be fully PLACED IN SERVICE by December 31, 2027 to claim anything. As of this research date, the start deadline is a month in the rearview: the industry's 2026-2027 book is now split between safe-harbored backlog racing continuity requirements and post-deadline projects racing an eighteen-month in-service cliff.

WHAT THE NUMBERS SAY

THE COST, SOURCED.

Sourced anchors

25D expiration 12/31/2025; 48E July 4, 2026 begin-construction deadline with four-year continuity; 12/31/2027 placed-in-service cliff for late starts; base 6 percent rate rising to 30 percent with prevailing-wage/apprenticeship compliance or sub-1MW size. (Tax Adviser, Spencer Fane, commercial-solar market guides, 2026.)

WHAT THIS TRADE SHOULD EARN

THE NUMBER TO MEASURE IT AGAINST.

Solar contractors run about % net profit at $1M to $5M, rising to roughly 9% at $5M to $10M. The CFOS target at $1M to $5M is10%, set at 10 percent before taxes or 3.5 points better than your trade's average at your revenue, whichever is higher. A problem like this one lives in the distance between those two figures rather than in a loss on any single job.

Gross margin over the same bands runs % to 23%, against a CFOS target of 10%.

Full solar benchmark bands by revenue

WHAT CONTROLS IT

THE SYSTEM THAT FIXES THIS.

Cash Flow Cycle System

Billing, documentation and collections, which is where the days hide.

How the Cash Flow Cycle System works

COMMON QUESTIONS

FREQUENTLY ASKED.

What net profit margin should a solar contractor make?

Solar contractors at $1M to $5M net about 6.5 percent on the SPM 48-trade benchmark dataset, rising to 9.5 percent by $25M to $50M; the CFOS target at $1M to $5M is 10 percent. In 2026-2027 the margin question is inseparable from the policy question: which clock each project is on, and whether the credit documentation holds. Every net profit figure here is stated before taxes, the same basis CFMA reports on, so the two are directly comparable.

What happened to the solar tax credits?

The OBBBA, signed July 4, 2025, ended the residential 25D credit on December 31, 2025 and put commercial 48E on a deadline: projects beginning construction by July 4, 2026 keep the 30 percent credit with a four-year completion window, while later starts must be fully in service by December 31, 2027 to claim anything. Verify current federal and state posture before quoting; the safe-harbor rules themselves have been litigated mid-year.

How does a solar contractor prove a project started in time?

Through the begin-construction tests: physical work of a significant nature (on-site or off-site under binding contract) or, where it applies, the 5 percent cost safe harbor, plus continuity documentation through completion. The IRS notice narrowing the 5 percent path was vacated in court in mid-2026 with an appeal expected, so the physical-work record is the durable evidence. Keep it to audit standard; it's worth 30 percent of the project.

What is included in the monthly fee?

Three tiers, and which one you are in depends on how much of the work you want off your desk. Core is where you stop guessing: job costing built against the way you estimate, a 13 week cash forecast, monthly WIP, and a monthly meeting that ends in decisions, while your bookkeeper keeps doing the books. Executive is where you stop touching the books, because we run the bookkeeping and the controllership as well. Strategic is where every job shows its margin while it is still running, because the job costing and WIP platform is set up and managed for you. No payroll. No scope gaps.

How long does onboarding take?

Sixty days. We migrate your books back to the start of your last taxable year, set up ControlQore, and build your job costing structure from scratch. Fully operational in two months.

WHAT THIS TIES INTO

THIS TRADE

Solar Operating System CFO for Solar Contractors

CFOS SPINE

Run on CFOS, Full System Index Cash Flow Cycle System

DECIDE

Pricing by Revenue Band Book a Call

Josh Luebker

FRACTIONAL CFO · THE CONSTRUCTION CFO

Former commercial construction project manager and master electrician. Managed 150+ projects worth more than $2.1B combined, with individual jobs from $50,000 to $300M, including data centers, military bases, hospitals, and high-rises. Now fractional CFO for commercial subcontractors doing $1M to $12M through Sulphur Prairie Management.About Josh | LinkedIn