Most people hear “production tax credit” and think it’s straightforward. A project generates clean energy, the owner earns credits per kilowatt-hour, and that’s the end of it. But the real action is in how those credits get split, sold, and structured between the parties who actually finance these projects. That’s where step-up structures come in, and honestly, they’re reshaping how renewable energy deals get done in the United States.
How Tax Equity Partnerships Actually Work
Before the Inflation Reduction Act changed the game, developers had one main option for monetizing a production tax credit: bring in a tax equity investor through a partnership flip. The setup works like this. A developer builds the project and sells it to a partnership right before it starts generating power. That sale happens at fair market value, which creates a “step-up” in the project’s tax basis. Why does that matter? Because higher basis means more depreciation deductions, and those deductions flow to the tax equity investor alongside the credits themselves.
The tax equity investor typically takes the lion’s share of credits and depreciation early on. Once they’ve hit their target return, the partnership “flips,” and the developer takes back majority control. It’s a structure that has financed wind and solar projects for over a decade. But it comes with baggage. The deals are complex, take months to close, and the pool of investors has historically been limited to large banks and insurance companies with predictable, sizable tax appetites.
What Changed with Transferability
Section 6418 of the Internal Revenue Code, introduced by the IRA, opened a new door. Developers can now sell eligible tax credits directly to unrelated buyers for cash. No partnership required. No flip mechanics. Just a transfer agreement, focused diligence, and typically tax credit insurance.
Here’s the thing about production tax credit transfers specifically. They tend to price higher than investment tax credit transfers because there’s no recapture risk for the buyer. If you buy a PTC, you’re not on the hook if the project underperforms years later the way you might be with an ITC. According to Crux Climate’s Q1 2025 market data, demand ran at roughly nine dollars for every one dollar of available PTCs. That kind of demand-supply imbalance tells you something about buyer confidence.
But transferability has a limitation that matters. The buyer gets only the tax credit itself. They don’t get depreciation. They don’t get the step-up in basis that a tax equity partner would. For projects where depreciation represents a significant chunk of the overall tax benefit, that’s real money left on the table.
Step-Up Structures Bridge the Gap
This is exactly where step-up accommodation structures earn their keep. Instead of choosing between a full tax equity partnership or a clean credit transfer, developers can blend the two approaches.
In a step-up accommodation deal, a minority investor comes into the project’s ownership structure to support a fair market value sale and the resulting basis step-up. That investor monetizes the depreciation. The production tax credit itself then gets transferred out to a separate buyer under Section 6418.
Think of it as splitting a project’s tax benefits into two streams: depreciation goes to one party through equity, credits go to another through a transfer. Each party gets the piece they’re best equipped to use.
Hybrid structures take this a step further. They use the familiar partnership flip model, but give the tax equity investor (or sometimes the developer) an option to transfer credits out of the partnership to a third-party buyer. Some practitioners call this a “t-flip.” The investor still captures depreciation and basis benefits from the equity position, while gaining flexibility to sell credits externally if pricing is attractive or if their own tax capacity changes.
Why This Matters for Your Deal
If you’re evaluating a renewable energy investment or developing a project, understanding how the production tax credit flows through these structures is not optional. It directly affects your returns.
A straight transfer is faster and simpler. Four to six weeks, focused diligence, and you’re done. But you’re leaving depreciation value behind. A full tax equity partnership captures everything but takes longer, costs more in legal and structuring fees, and limits your investor universe. A step-up or hybrid structure sits in the middle, capturing the basis step-up while keeping the transfer market’s liquidity advantage.
To get a clearer picture of how the production tax credit works at a foundational level, it helps to start with the basics of credit eligibility and calculation before layering on these financing structures.
Conclusion
The production tax credit is no longer a simple per-kilowatt-hour benefit that sits on one balance sheet. Step-up structures, hybrid partnerships, and direct transfers have turned it into a flexible financial instrument that multiple parties can share based on what they actually need. Developers get capital, equity investors get depreciation, and credit buyers get a clean tax offset. The deals are getting more creative, and for anyone in clean energy finance, keeping up with these structures isn’t just useful. It’s necessary.
