A homeowner I spoke with last month had already gotten three quotes for a rooftop system, was ready to sign, and then found out the 30% federal tax credit she’d been counting on had quietly disappeared. She hadn’t heard about the One Big Beautiful Bill Act. A lot of people haven’t. Under that legislation, the Section 25D residential solar tax credit expired on December 31, 2025, and anyone buying panels outright in 2026 gets exactly zero federal incentive. That’s a significant shift, and it’s reshaping the market faster than most homeowners realize. If you’re evaluating solar right now, there’s a structure called the prepaid lease with a six-year ownership transfer that has essentially become the workaround, and there’s a hard deadline bearing down on it.

Why the Tax Credit Disappearing Actually Matters More Than You Think

When the 30% credit existed, a $30,000 system meant a $9,000 check back from the IRS. Gone. For a cash buyer in 2026, the math on solar gets harder immediately. You’re paying full retail. The payback period stretches out. The financial case still works in high-electricity-cost states, but the cushion is thinner.

What most people don’t realize is that the commercial investment tax credit, Section 48E, is still alive, running through the end of 2027. The catch: it’s only available to businesses, not individual homeowners. So the only way you get any piece of a federal solar incentive in 2026 is if a business owns your panels, claims that credit, and passes some of the savings to you. That’s the entire premise behind third-party ownership, and it’s why Jefferies analysts are projecting a 25% increase in TPO solar adoption this year, with nearly half of all new residential systems already owned by third parties rather than homeowners.

What a Prepaid Lease Actually Is

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AspectBefore (2025)After (2026)Third-Party Ownership
Residential Tax Credit (25D)30% of system costExpiredN/A
Commercial Tax Credit (48E)Available to businessesAvailable through 2027Available to TPO providers
Effective discount for cash buyer~30% via tax credit0%~30-35% passed through prepaid lease
Upfront cost structureFull retail or financedFull retail~70% of retail cost
Homeowner ownership timelineImmediateImmediate6 years (then transfer)
IRS Safe Harbor deadlineN/AN/AJuly 4, 2026

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The structure is less complicated than it sounds, even if the paperwork can make your eyes cross. Here’s what actually happens: a solar financing company installs panels on your roof. They own the system. Because they’re a business, they claim the Section 48E credit, which is currently worth 30% of system cost. They also claim MACRS accelerated depreciation, another meaningful tax benefit available only to business owners. Combined, these benefits amount to roughly a 30 to 35% discount off the retail system cost for the financing company.

You, the homeowner, pay about 70% of the system’s cost upfront as a single lump sum. That’s the “prepaid” part. In exchange, you get to use the electricity the panels produce, and you get a contract guaranteeing that after six years, ownership of the system transfers to you, often for as little as $1. No ongoing monthly payments. No lease you’re stuck in for 20 years.

According to Solar.com’s June 2026 guide on prepaid leases, this structure has emerged as the primary path for homeowners to access indirect federal incentives after the expiration of 25D. EnergySage’s January 2026 analysis reached the same conclusion, noting that prepaid arrangements have moved from a niche product to a mainstream option precisely because of the policy shift.

The six-year window isn’t arbitrary. It’s tied to the MACRS depreciation schedule, which requires the financing company to hold the asset for a defined period to fully capture the tax benefit. Once that clock runs out, there’s no financial reason for them to keep owning your panels. The dollar transfer makes both sides whole.

The July 4 Deadline Is Real and It’s Coming Fast

Here’s the part that makes this genuinely urgent rather than just interesting. To claim the Section 48E credit, a TPO provider needs to either have their system placed in service by December 31, 2027, or begin construction early enough to qualify under safe harbor rules. The IRS safe harbor provision allows a project to lock in today’s credit rate by starting construction, even if installation isn’t complete yet.

The last date for a TPO provider to begin construction and safely harbor the Section 48E credit for systems placed in service by the end of 2027 is July 4, 2026. That is not a lot of runway. If you’re seriously considering a prepaid lease, that deadline is your deadline too, because any installer who misses it cannot lock in the credit for your project. The discount they were passing through to you evaporates. Your 70% upfront cost could look more like 85 or 90% of retail, and the whole value proposition changes.

This isn’t fear-mongering. It’s a real constraint that installers and financing companies are managing right now, which is partly why you’re seeing aggressive outreach from solar companies in May and June of this year.

What You’re Actually Getting, and What Could Go Wrong

I’ve seen prepaid leases work really well for the right homeowner. I’ve also seen them go sideways. Here’s what to think carefully about.

The upside is real. You capture indirect access to the 48E credit through the discount baked into your 70% cost. You own the system outright after six years with no additional payment. No performance risk because you’re not buying a specific production guarantee, you’re buying the hardware at a discount.

The complications are also real. Your roof needs to be in good shape for the full six-year period, because a TPO company will require repairs before they sign off on ownership transfer if there are issues. Selling your home before year six means transferring the lease, which some buyers find confusing or off-putting. And as IntegrateSun notes in their 2026 incentives guide, net metering policies have been eroding in many states, which means the bill savings you’re projecting need to account for whatever your utility is actually offering today, not what it offered three years ago.

On the storage question: a BloombergNEF report published June 15, 2026 found that 40% of new residential solar systems in Q1 2026 included a battery, up from 35% in 2025. TPO providers are bundling storage more aggressively to help homeowners self-consume more electricity as net metering becomes less favorable. If you’re getting a prepaid lease quote that doesn’t include battery storage, it’s worth asking whether that makes sense for your utility territory.

How to Vet a Prepaid Lease Offer Before You Sign

The number one thing I’d tell a friend before they sign anything: get the total cost per watt in writing, and compare it to recent cash purchase quotes on EnergySage or a local installer. The gap between what you’re paying and what a cash buyer would pay is essentially the value of the incentive pass-through. If that gap is small, the offer isn’t passing much through to you.

Ask specifically: what happens to ownership transfer if the financing company is acquired or goes out of business? This should be addressed in the contract through a UCC lien release or similar protection. Ask what the transfer condition requirements are. Some contracts require the system to be producing at a certain level or the roof to pass inspection before they hand over the title.

Also confirm, in plain language, that your installer can document a construction start before July 4, 2026, and that this documentation will satisfy safe harbor requirements. This should not be a vague promise.

The prepaid lease isn’t perfect, and it’s not for everyone. But in a year when the direct residential credit is gone and the commercial credit has a real expiration horizon, it’s the most financially rational path for a lot of homeowners who want solar without writing a check for full retail. The window to use this structure with a locked-in federal benefit is measured in weeks, not months. That’s worth knowing before you decide.

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