Tax Equity vs. Credit Transferability: Choosing the Right IRA Structure
The Inflation Reduction Act created a new choice for clean energy project developers: stick with traditional tax equity financing, or use the new transferability mechanism to sell credits directly for cash. This guide breaks down how each structure works and when to use which.
What Is Tax Equity?
Tax equity has been the dominant financing mechanism for clean energy since the early 2000s. In a tax equity deal, a corporate investor — typically a bank, insurance company, or large corporation — invests cash into a project entity in exchange for the project's federal tax benefits. These benefits primarily include:
- The Investment Tax Credit (ITC) or Production Tax Credit (PTC)
- Accelerated depreciation (5-year MACRS for solar, wind, and most clean energy assets)
- Any applicable bonus depreciation
The investor earns its return by applying these tax benefits to reduce its own federal tax liability — not by receiving cash distributions. The most common structure is the partnership flip: the tax equity investor initially holds a large percentage of the project entity (often 99%), capturing the tax benefits, and then "flips" to a much smaller interest (often 5%) once it achieves its target after-tax yield. The developer retains a buyout option at fair market value.
Tax equity investors typically target yields of 6-9% after-tax, depending on credit quality, technology risk, and market conditions. The holding period is generally 5-10 years, with many investors requiring a 5-year hold for ITC recapture protection. The market size is approximately $20-25B per year.
What Is Credit Transferability?
Section 6418 of the IRA, enacted in August 2022, created a new mechanism: project owners can sell most IRA-eligible tax credits to unrelated third parties for cash. No partnership or joint ownership is required. The mechanics are straightforward:
- The project owner generates the credit (e.g., ITC at commissioning)
- The owner and buyer execute a purchase and sale agreement
- The buyer pays cash — typically 88-96 cents per dollar of credit
- The buyer claims the credit on its own tax return; the seller files Form 3800 to elect the transfer
Critically, transferability does not monetize depreciation — only the tax credit itself. For projects where accelerated depreciation is a significant portion of the value (e.g., large utility-scale solar), this is a meaningful difference from tax equity.
Side-by-Side Comparison
| Factor | Tax Equity | Transferability |
|---|---|---|
| Complexity | High — partnership structure, legal docs, lender consents | Low — purchase & sale agreement only |
| Transaction Cost | $200K-$500K+ in legal/advisory fees | $50K-$150K in legal/advisory fees |
| Timing to Close | 3-6 months | 4-8 weeks |
| Credits Eligible | ITC, PTC, 45Q, 45V, 48C (varies by structure) | ITC, PTC, 45Q, 45V, 48C, 45L (Section 6418 list) |
| Depreciation Monetized | Yes (MACRS 5-year + bonus depreciation) | No (credits only) |
| Pricing (cents per $1) | 90-95¢ (implicit, after tax benefit calc) | 88-96¢ (explicit, cash payment) |
| Recapture Risk Bearer | Shared between developer and investor | Seller (insurable with tax credit insurance) |
| Ownership Structure | Partnership required; investor holds % of entity | No partnership; seller retains full ownership |
| Minimum Deal Size | ~$5M+ (practical floor) | ~$500K+ (smaller deals viable) |
| Ongoing Reporting | Quarterly K-1s, partnership tax compliance | Annual Form 3800 election; minimal ongoing |
When to Choose Tax Equity
Tax equity is still the right choice in several scenarios:
Large projects over $50M in ITC basis
The fixed transaction costs of tax equity (legal, structuring, accounting) are more easily absorbed by larger projects, and the additional value from monetizing depreciation is significant.
Stacking with LIHTC or NMTC
Low-Income Housing Tax Credits and New Markets Tax Credits are not transferable under Section 6418. If your project stacks ITC with LIHTC (e.g., affordable housing with solar), tax equity is often the only viable structure to monetize all credits in a single transaction.
Lender or partner requirements
Some lenders and institutional partners are more familiar with tax equity structures and may require them as a condition of financing. Traditional infrastructure debt is often sized with tax equity as an assumed component.
Depreciation value is significant
For projects with large depreciable basis (utility-scale solar, wind, storage), accelerated MACRS depreciation can add 15-25% additional value over transferability alone.
When to Choose Transferability
Transferability has opened the market to a much wider range of projects and sellers:
Smaller projects ($500K–$10M in credits)
Tax equity market participants typically require minimum deals of $5M+ in tax benefits. Transferability enables smaller projects to monetize credits that would have previously been stranded.
Speed is critical
A credit transfer can close in 4-8 weeks versus 3-6 months for tax equity. For projects on a tight commissioning or financing timeline, this is often decisive.
First-time developers
Tax equity requires extensive legal documentation, partnership structuring, and an established relationship with an investor. Transferability is far more accessible for developers new to federal credit monetization.
Tax-exempt entities as project developers
Nonprofits and governments can claim ITC via direct pay (Section 6417). For projects where such entities are developers but do not have sufficient tax liability even for direct pay purposes, transferability allows them to sell credits to taxable buyers.
Can You Use Both Structures?
In some circumstances, yes. A project might transfer the ITC while a separate tax equity investor monetizes the depreciation. This "hybrid" approach requires careful structuring to ensure the depreciation investor is a genuine equity participant and not merely a party with contractual rights — the IRS scrutinizes structures that separate credit monetization from project ownership.
Additionally, if a project is part of a partnership with a tax equity investor who does not want the ITC (for example, a PTC partnership), the partnership can elect to transfer PTCs directly to the tax equity investor rather than having the investor use them on its own return — this is a less common but sometimes advantageous application.
Note: IRS Notice 2024-27 and the final Treasury regulations on transferability (released 2024) impose specific rules on combining structures. Always engage qualified tax counsel before structuring a hybrid deal.
Frequently Asked Questions
What is tax equity financing?
Tax equity financing is a structure where a corporate investor with large tax liability invests cash into a clean energy project in exchange for the project's tax benefits — primarily the ITC or PTC plus depreciation. The investor earns a return by using these tax benefits to reduce its own tax bill, typically over a 5-10 year holding period.
What is credit transferability under the IRA?
Section 6418 of the IRA (enacted August 2022) allows project owners to sell most IRA tax credits directly to third-party buyers for cash. Unlike tax equity, no partnership is required — the seller retains full ownership of the project and simply transfers the right to claim the credit to a buyer.
Which structure provides more value per dollar of tax credits?
Tax equity typically delivers 90-95 cents per dollar of tax credit value (when accounting for the full equity investment), while transferability pricing typically runs 88-96 cents per dollar. However, tax equity also monetizes depreciation (MACRS), which can add significant additional value for large projects. Smaller projects often find transferability delivers better net economics when accounting for transaction costs.
Can a project use both tax equity and transferability?
Yes, with careful structuring. A project can transfer certain credits (e.g., the base ITC) while using tax equity for the depreciation benefits. However, IRS Notice 2023-29 and final Treasury regulations impose restrictions on combining the structures, and legal counsel familiar with the specific credit types involved is essential.
What is recapture risk and who bears it?
Recapture risk is the risk that previously claimed tax credits are "recaptured" (clawed back) by the IRS if the project is disposed of or ceases to qualify within the recapture period (generally 5 years for ITC). In a tax equity deal, recapture risk is typically shared between the developer and the tax equity investor per the partnership agreement. In a transfer, the seller bears primary recapture risk but can purchase tax credit insurance to transfer this risk to an insurer.
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