A 45x credit deal looks simpler than an investment tax credit transfer on paper. No basis analysis. No recapture risk. No prevailing wage compliance to verify. But that surface-level simplicity is deceptive because the entire credit hinges on two questions that need clean documentary proof: Did the manufacturer actually produce an eligible component in the United States? And did they sell it to an unrelated person? If the records supporting either answer are thin, a buyer has a real problem.
Why Production Records Carry So Much Weight
The 45x credit is a per-unit credit tied to production output, not a percentage of capital invested. That makes the production documentation fundamentally different from what buyers review in a Section 48 ITC deal. There’s no cost segregation study. There’s no basis to argue about. Instead, there’s a manufacturing facility that claims to have produced a specific quantity of eligible components: solar modules, battery cells, inverters, polysilicon, critical minerals and the buyer needs evidence that those claims hold up.
What does that evidence look like? Production logs, typically. Detailed records showing what was manufactured, when, in what quantities, and at which facility. For components where the credit is calculated by size or weight (solar-grade polysilicon at a per-kilogram rate, solar wafers by the square meter), the records need to support precise measurement. For components credited by electrical capacity solar modules, for example the documentation needs to confirm wattage output at the unit level.
For critical minerals, the math works differently. The 45x credit for applicable critical minerals equals 10% of production costs, which means buyers aren’t just reviewing output volumes they’re reviewing the cost accounting behind those volumes. That’s a layer of complexity that solar component deals don’t typically carry.
The Sale Has to Be Real, Documented, and to an Unrelated Person
Here’s where deals occasionally run into trouble. Under Section 45X, the credit doesn’t attach at production. It attaches when the eligible component is both produced and sold to an unrelated person in a trade or business. Internal transfers don’t count. Inventory sitting in a warehouse doesn’t count. The sale has to actually happen.
Buyers reviewing a 45x credit transfer will ask for sales contracts, invoices, and shipping records. They want to see that the purchaser of the components is genuinely unrelated to the manufacturer, no common ownership, no control relationships that would disqualify the transaction under the related-party rules. The IRS final regulations make clear that whether a transaction qualifies as a “sale” is determined by general federal income tax principles, which means substance matters more than labels.
There is a related-party election available. A manufacturer can elect to treat certain sales to related persons as if they were made to unrelated persons, but the buyer of the transferred credit is going to want to see the election paperwork, understand the structure, and assess whether the election was properly made. A memo from the seller’s tax counsel explaining the election and its basis is pretty standard in these deals.
What Changed Under the One Big Beautiful Bill
The OBBB preserved 45x credit transferability, but it introduced new wrinkles that affect documentation. Wind energy components are no longer eligible for credits on sales after December 31, 2027. Solar components, battery components, and inverters keep their full credit rates through 2029, then enter a phasedown 75% for sales in 2030, 50% in 2031, 25% in 2032, and zero after that.
The bigger documentation shift is around prohibited foreign entity compliance. Starting January 1, 2026, manufacturers claiming the 45x credit face new requirements to track whether their constituent materials were sourced from prohibited foreign entities. The IRS’s material assistance cost ratio guidance requires manufacturers to identify constituent materials, track their direct costs, and determine whether those materials are PFE-sourced.
Putting Together a Clean Data Room
Sophisticated sellers preparing to transfer advanced manufacturing production credits are assembling data rooms that include facility profiles, production logs with unit-level detail, aggregation worksheets reconciling production volumes to claimed credit amounts, redacted sales invoices, and increasingly PFE tracking documentation for each eligible component line. Pre-filing registration evidence and a draft or filed Form 7207 round out the package.
The goal is straightforward: give the buyer enough to confirm that the 45x credit was properly generated before they wire the cash. In a market where these credits trade at roughly 91 to 94 cents per dollar of credit value, that diligence isn’t a formality. It’s the reason the deal prices where it does.
Conclusion
The 45x credit avoids some of the heaviest diligence burdens that come with investment tax credits no basis disputes, no recapture exposure, no PWA verification. But what it does require is clean, granular proof that real components were manufactured in the United States and sold to unrelated buyers. Production logs, sales records, related-party election memos, and now PFE compliance documentation that’s the package. Buyers who close without reviewing it thoroughly are taking on risk that the credit’s structural simplicity was supposed to eliminate.
