OBBBA Changes Solar Incentives: What Homeowners Need to Know Now
Published · 4 min read
The One Big Beautiful Bill Act (OBBBA) became law on July 4, 2025. It changes many U.S. tax credits, including clean energy incentives. These changes affect homeowners and solar companies. And they create new deadlines you shouldn’t ignore.
Federal agencies have started releasing guidance. Early IRS updates confirm that several energy credits now end sooner than expected. This includes the Residential Clean Energy Credit under Section 25D.
What’s a TPO, in plain English?
A third-party operator (TPO) is a company that owns your rooftop solar. You sign a lease or a power purchase agreement (PPA). The TPO installs and maintains the system. You pay monthly instead of buying the system yourself.
- Lease: You pay a fixed monthly amount to use the system.
- PPA: You pay a set price per kWh for power the system makes.
These models grew because they cut the big upfront cost for families. And they are common for non-residential sites too.
What OBBBA changes for homeowners
Before OBBBA, Section 25D ran through 2034 with a 30% rate through 2032. OBBBA accelerates the end date. The IRS says the 25D credit won’t be allowed for expenditures made after December 31, 2025. That is a big shift.
The IRS also posted a central page on OBBBA’s tax changes. It links to fact sheets and FAQs on the new end dates. The message is clear. The residential clock is ticking.
What stays available for TPOs
Because TPOs own systems, they use commercial credits. The big one is the Clean Electricity Investment Credit (Section 48E). The base credit is 6%, but it rises up to 30% when projects meet wage and apprenticeship rules. It can also grow with domestic content and energy community bonuses.
New OBBBA timelines matter here too. For wind and solar that begin construction after July 4, 2026, projects must be placed in service by December 31, 2027, to get 48E credits. Energy storage under 48E does not have that placed-in-service deadline. That gives storage a longer runway.
Law firm summaries and new IRS notices also outline “begin construction” rules and safe-harbor concepts going forward. The Treasury’s recent notice focuses on how the government will judge the start of construction after OBBBA.
One more point on economics. OBBBA removes five-year MACRS for legacy Section 48 “energy property.” But 48E property remains in five-year MACRS, according to legal analysis. That split matters for project math.
Ownership vs. TPO under OBBBA
| Topic | Buy & Own | TPO (Lease/PPA) |
| Who claims federal credit? | The homeowner claims Section 25D (until 12/31/2025 for new spending). | TPO claims Section 48E (subject to project rules). |
| Key deadline | 25D ends for expenditures after Dec 31, 2025. | Wind/solar that starts after July 4, 2026, must be placed in service by Dec 31, 2027. Storage is not subject to that placed-in-service deadline. |
| Base credit | The 30% rate applied by law before OBBBA now ends for new spending after 2025. | 6% base, up to 30% with wage and apprenticeship. Bonuses may add more. |
| Depreciation | Not applicable to individuals for home property. | 48E property remains 5-year MACRS; legacy 48 energy property removed from 5-year MACRS. |
Practical effects for households
- If you plan to own: The residential credit window is short. Spending after 2025 won’t qualify under 25D. So scheduling and completion are crucial.
- If you prefer a TPO, TPOs can still use 48E. Many leases and PPAs will continue. But wind and solar timelines are tighter for some projects.
- Service model trade-offs:With TPOs, the company handles upkeep. With ownership, you control equipment and upgrades. These basics haven’t changed.
Key dates at a glance
- July 4, 2025: OBBBA signed into law.
- December 31, 2025: Section 25D no longer allowed for expenditures after this date.
- July 4, 2026: After this date, wind and solar that begin construction face a placed-in-service deadline.
- December 31, 2027: Placed-in-service deadline for those wind and solar facilities to get 48E. Storage isn’t subject to this placed-in-service deadline.
How to think about next steps
If your goal is to claim a personal federal credit, ownership is now time-sensitive. You’ll want signed contracts, delivery, and installation planned with care. And you’ll want to track invoices and dates. The IRS FAQ highlights that 25D turns off for expenditures after 2025. That’s the line in the sand.
If you like the low-upfront approach, a TPO still works. TPOs can claim 48E and may pass savings into pricing. But project timelines and “begin construction” rules matter now. Ask clear questions about placed-in-service plans, wage rules, and domestic content. These details can raise the credit from 6% to as high as 30%, plus possible bonuses.
Markets keep moving. Treasury is updating its guidance on when a project is considered “under construction.” That affects safe-harbor strategies and schedules. Don’t be shy; ask your provider how they plan to qualify.
Bottom line
OBBBA doesn’t ban leases or PPAs. But it shortens the homeowner credit window and adds deadlines for many wind and solar projects. Ownership lets you claim a personal credit, but only if your spending occurs by the end of 2025. TPOs can still claim 48E, and storage has a longer runway. The right choice depends on your budget, timing, and risk tolerance. And yes, time really matters now.
