Lease and PPA in 2026 — when they make sense, when they don't

For two decades, the honest line on solar leases and Power Purchase Agreements was: probably skip them. The leasing company captured the federal credit, you didn't, and lease lifetime cost ran 30-50% higher than cash. That advice was right under the Inflation Reduction Act. Under the One Big Beautiful Bill Act and through 2027, it's no longer right by default. The federal residential credit (§25D) is gone for cash and loan buyers; the §48E commercial credit that lease and PPA providers capture is still alive. For many mid-bill households in 2026, lease genuinely beats cash. The trick is telling that situation apart from the lease offers that are still traps. Here's how.

By The Solar Brief Editorial Team  ·  Reviewed by To be assigned (paid solar advisor)  ·  Updated May 2026

Why the inversion happened

The Inflation Reduction Act of 2022 set the residential Investment Tax Credit (§25D) at 30% through 2032, with a planned step-down. Under that schedule, a cash buyer captured 30% of system cost off their next federal tax bill; a lease buyer gave that value up to the leasing company. Cash > loan > lease > PPA was therefore a near-universal hierarchy for owner-occupied homes with sufficient federal tax liability. "Lease/PPA traps" was a fair default warning in honest solar content because the math almost always pointed that way.

The One Big Beautiful Bill Act, signed July 4, 2025, terminated §25D for systems placed in service after December 31, 2025 (IRS OBBBA FAQ). The §48E commercial credit, which third-party owners (leasing companies and PPA providers) claim on systems they own, remains available — with construction-begin and placed-in-service safe harbors that effectively keep it alive through 2027 (SEIA OBBBA explainer). The leasing company captures §48E. The better operators pass some of that value through as lower per-kWh rates. The arithmetic that produced "lease = trap" is no longer the same arithmetic in 2026.

Four red flags that are still traps — even now

The federal-credit math changed; the contractual gotchas didn't. Four lease and PPA terms remain genuine traps in 2026. None of these are made better by the §48E passthrough — they're independent contract risks that sit on top of any pricing benefit.

The three §48E passthrough patterns — and how to ask

The §48E commercial credit equals 30% of the system's eligible cost, claimed by the system's owner. When a leasing company owns the system on your roof, they're the owner — the credit goes to them. There is no rule requiring them to pass any of that value through to you. Whether they do, and how much, is a competitive decision specific to that installer and that market. Three patterns we see in May 2026:

The honest read: get three lease quotes the same way you'd get three cash quotes. Variance between TPO providers in 2026 is meaningful — the difference between "great deal" and "no real benefit" is not subtle. Ask each one directly: "How much of the §48E credit are you passing through to my per-kWh rate, and can you show me the math?" The answer reveals which of the three categories above they're in. Aggressive-passthrough installers will engage the question with specific numbers. No-passthrough installers will deflect or cite "proprietary pricing models." That deflection is the answer.

When lease genuinely beats cash through 2027

Cash purchase still produces the lowest lifetime cost for households where cash payback works. That's specifically: monthly bill of $250 or more, owner-minded buyer, in a state with a strong incentive stack (NJ, MA, CA-with-battery), with the cash to put down or qualifying credit for a sub-7% loan. For those households, the analysis hasn't changed structurally — cash still wins, just with a longer payback period than under §25D.

For other households, lease through 2027 is now the structurally better path. Specifically:

• Mid-bill households ($150-250/mo) in any state. Cash payback at this bill level no longer pencils within useful life without the federal credit. Lease with a §48E passthrough does. The math reverses cleanly.
• Households in low-incentive states (TX, NV, AZ). Even at higher bills, the thin state stacks don't absorb the federal-credit loss. Lease typically pencils 2-4 years better effective payback than cash.
• Households with low federal income tax liability. Pre-OBBBA, this was a §25D consideration; in 2026 it doesn't matter for cash buyers (no credit to claim) but it still matters for lease comparison with cash — if the §25D-style "you can't use the credit anyway" argument applied to you, lease is now genuinely better than the cash alternative would have been.
• Households planning to sell in 5-10 years. Cash payback past 12 years means selling before you've recovered the cash outlay. Lease shifts that risk to the leasing company.
• Households who genuinely don't want the ownership headache. Lease maintenance, monitoring, and warranty handling are all the leasing company's job. For many homeowners, that's worth more than the marginal lifetime-cost difference.

When cash still wins

Cash is the cheapest path over the system's life for households that hit all of these conditions:

• Monthly bill of $250+ ($200+ in NJ/MA where SuSI/SMART absorb most of the federal-credit loss)
• Strong state incentive stack (NJ, MA, CA-with-battery via SGIP, AZ for state credit)
• Owner-minded buyer who values equipment ownership and home-value premium
• Liquidity to put cash down (or credit for a 5-7% solar loan that doesn't kill the lifetime cost advantage)
• Plans to stay in the home 12+ years to capture full payback
• Roof in good shape (no looming replacement that would force panel removal mid-life)

For New Jersey homeowners specifically, cash still wins by a wide margin. The 15-year SuSI per-kWh program produces a state-level cash flow that partially absorbs the lost federal credit better than any other state program (NJ Board of Public Utilities). NJ TPO providers will compete in your market, but the comparable-baseline lease offer typically beats cash only at the lowest end of the bill range.

The decision matrix in one table

Pulling it all together — bill, state, ownership philosophy, and timing produce a clean recommendation in most cases:

Your situation	Recommendation	Why
Bill $250+/mo, owner-minded, NJ/MA	Cash purchase	SuSI / SMART stack absorbs federal-credit loss; cash still wins
Bill $250+/mo, owner-minded, CA with battery	Cash if cash-rich; lease worth comparing	NEM 3.0 already required battery; OBBBA stretched cash payback to 12-16 yrs; lease offers in CA pass §48E aggressively
Bill $250+/mo, owner-minded, TX/NV/AZ	Compare cash and lease quotes head-to-head	Thin state stacks make the lease pivot meaningful even at higher bills
Bill $150-250/mo, owner-flexible, any state	Lease (TPO) through 2027	§48E passthrough makes the math work where cash purchase wouldn't
Bill $150-250/mo, owner-only insistence	Wait or weatherize first	Cash math doesn't pencil at this bill level without the federal credit; if lease isn't acceptable, the alternative is to lower the bill and reassess
Bill $300+/mo, no liquidity	Solar loan; comparable lease quote as backup	Loan keeps ownership; lease may produce comparable economics through 2027 — get both
Variable monthly bill (vacation home, work-from-home)	PPA over fixed lease	Per-kWh pricing aligns with consumption; you don't pay for production you don't use
Bill under $150/mo, any structure	Skip; consider community solar	Math doesn't pencil for ownership or lease at this bill level in 2026

The 2027 calendar fact — and why it matters more for lease than for cash

The §48E commercial credit ends December 31, 2027 unless extended. Construction must begin by July 4, 2026 OR the system must be placed in service by December 31, 2027 to qualify (26 U.S.C. §48E as amended by OBBBA; Arnold & Porter analysis). After that window closes, the lease and PPA federal lever disappears unless extended. As of May 2026 there is no active extension effort.

For cash buyers, this calendar fact is informational — the §25D credit they would have used is already gone, so 2028 doesn't change much for them. For lease and PPA candidates, the 2027 sunset is the deciding-time fact: the favorable lease pricing currently available reflects the leasing company's ability to capture §48E. Without §48E, lease and PPA pricing reverts to economics that look more like 2014 than 2026 — the leasing company has to charge more per kWh because they no longer have a federal credit funding the gap.

The honest read: if a lease or PPA is the right move for your household, it's the right move now or in the next 18 months — not in 2028. Expect aggressive marketing from TPO providers in late 2026 and early 2027 — some honest, some pressure-driven, some both. The four-trap checklist above doesn't change. The §48E passthrough question doesn't change. What changes is the deadline; act with that on the calendar.

Resale and refinance considerations

Solar-on-roof affects home resale and refinance differently depending on whether the system is owned or leased. Owned systems consistently add to home value — Lawrence Berkeley National Laboratory's standard reference studies on solar home premium find roughly $4 of added value per watt installed in well-functioning markets, meaning a 7 kW owned system adds approximately $28,000 to home market value at sale (LBNL — Selling into the Sun).

Leased systems are typically value-neutral to modestly negative. The buyer assumes the lease (subject to the leasing company's credit check) or the seller buys the system out before sale; either path adds friction to closing. Some buyers walk away from offers on solar-leased homes specifically because they don't want the contract obligation. The friction varies by market — in California and the Northeast, solar leases are common enough that they're a routine part of negotiations. In less-mature solar markets they can complicate sales.

Refinance is similar: refinancing a mortgage on a home with an owned solar system is straightforward (the system is part of the home value). Refinancing with a leased system requires the lender to either assume the lease into the loan or the homeowner to demonstrate the lease payment is serviceable — this is increasingly routine but still adds underwriting friction in some markets.