Tax equity and fund capital for DER

A DER project creates three kinds of value: cash from bill savings and program pay, a federal investment tax credit (ITC) and depreciation deductions. A small developer or host often can’t use the second and third. Tax equity investors, usually large banks and insurers, put cash into the project and receive most of the tax benefits until they reach a target return. Then ownership “flips” to the sponsor.

Since 2023, a project can also sell its credit for cash to an unrelated buyer. The July 2025 tax law kept that option, called transferability, but barred transfers to specified foreign entities (Sidley’s summary of the law). The result is a market where tax equity, credit sales and hybrids of the two compete for the same projects.

Tax equity investment exceeded $36.6 billion in 2025, up 22% from 2024, and hybrid structures made up more than 75% of commitments, according to Crux’s 2025 market report. Credit transfers reached nearly $42 billion. Buyers pulled back in the second half of 2025 as they reassessed their own tax bills after the new law, leaving $8 billion to $10 billion of 2025 credits unsold at year end.

Residential projects add a twist. The residential clean energy credit ended for systems installed after 2025, so a homeowner who buys a battery outright gets no federal credit. A leased or third-party-owned system can still qualify for the business credit under 48E, which is why lease and power purchase agreement offers have grown in importance since the law changed. Leased solar faces the 2026–2027 solar deadlines; leased storage keeps the full credit through 2033.

Seller credit quality now matters a lot. Investment-grade ITCs averaged $0.940 in the first half of 2025 and $0.931 in the second, per Crux’s lender briefing, and the premium over other sellers widened to about three cents. In the third quarter, the average 2025-vintage ITC fell to $0.893 as demand thinned. Credits under the newer technology-neutral 48E are pricing $0.01 to $0.02 below legacy credits for similar projects.

For a small DER developer, those gaps are the difference between a financeable project and one that isn’t. A non-investment-grade seller with a small portfolio may also pay more for tax-credit insurance and legal work as a share of the deal.

Take the 100 kW, 400 kWh commercial battery from our Hawaiian Electric C&I page: $240,000 installed, a 30% credit worth $72,000, and depreciation on a basis reduced by half the credit, all deducted in year one under permanent 100% bonus depreciation. At a 21% corporate rate, the depreciation is worth about $42,840.

The host route uses every tax dollar, but only a C-corporation with enough tax liability can do it; individuals and small businesses often hit passive-loss and at-risk limits. The credit-sale route turns $72,000 of credit into $66,960 of cash and leaves the sponsor with $68k of equity to raise. The tax equity route brings in about $106k up front but adds legal cost, and the investor’s cash share before the flip reduces how much debt the project can carry.

Tax investors care first about whether the benefits arrive and stay. Their checklist is different from a lender’s:

• Recapture. If the project is sold or stops qualifying in the first five years, part of the ITC is clawed back: all of it in year one, falling by 20 points a year.
• Foreign-control recapture. For ITCs claimed in tax years beginning after July 4, 2027, a payment that gives a prohibited foreign entity effective control within ten years can trigger 100% recapture (Kirkland & Ellis).
• Supplier documentation. Storage that starts construction in 2026 must show that at least 55% of component cost comes from suppliers that aren’t prohibited foreign entities, rising to 75% after 2029 (Plante Moran). Treasury has issued interim rules but not final regulations.
• Tax credit insurance. Buyers often want the credit insured, but minimum premiums make that impractical for small credits; see our DER insurance guide.
• Basis and valuation. An inflated cost basis raises the credit but invites audit. Investors want an independent appraisal on larger deals.
• Buyer and investor tax capacity. The 2025 slowdown showed that the investor’s own tax bill can shrink a market overnight.
• Cash to reach the flip. Lower bill savings or lost program pay don’t remove the credit, but they delay the flip and cut the sponsor’s back-end value.

Most DER assets are too small to finance one at a time. A 100 kW battery or a home battery lease only works for a tax investor when it sits in a fund: a portfolio of hundreds or thousands of similar contracts with one set of documents, one tax equity partner and one lender. The fund sponsor raises tax equity for the portfolio, adds back-leverage against the pooled cash and keeps the residual.

Fund investors underwrite the pool rather than the site. They look at host credit scores and default history, contract terms and how often contracts are prepaid or transferred, the spread of utility territories and rate schedules, and the sponsor’s operating record. Rate risk enters here as concentration: a fund heavy in one utility is exposed to one rate case. The Finance hub covers how those rate risks are hedged.