Guide
The federal solar tax credit in 2026: what the IRS page says now
Updated
For several years the safest line in a solar quote was "take 30% off, courtesy of the IRS". Before you accept that line on a 2026 California quote, read what the IRS page actually says today.
The two sentences that matter
The IRS page for the residential clean energy credit, Internal Revenue Code Section 25D, opens its "How it works" section with this: "The Residential Clean Energy Credit equals 30% of the costs of new, qualified clean energy property for your home installed anytime from 2022 through December 31, 2025." The next sentence reads: "The credit is not available for any property placed in service after December 31, 2025" (irs.gov).
The same page also states, under how to claim it, that "you must claim the credit for the tax year when the property is installed, not merely purchased". So the date that matters is not the date you signed and not the date you paid a deposit.
One older sentence further down the same IRS page still refers to the credit phasing out in 2033, which was the position under earlier law. Where a page contradicts itself, the safe reading is the restrictive one, and the safe action is to ask a tax professional. We quote both here so you are not surprised when you read the page yourself.
Why this is worth real money
On the $32,480 example in our calculator, a 30% credit would have been $9,744. That is not a rounding error, it is a decision changer, and it is the single most expensive thing to get wrong on a California quote in 2026. Treat any quote that nets a federal credit off the price as requiring written justification.
Cases to check rather than assume
- Installed in 2025, paid in 2026
- The IRS wording turns on when property is installed or placed in service. If your dates straddle the boundary, that is a question for a tax professional with your paperwork in front of them.
- Leases and power purchase agreements
- When a third party owns the system, the homeowner was never the one claiming Section 25D. The owner may claim a different business credit with its own rules and timetable. If a lease is pitched to you on tax grounds, ask exactly who receives what, and read the escalator clause.
- Batteries bought on their own
- Battery storage of at least 3 kilowatt hours was qualified property under Section 25D from 2023. The same placed-in-service wording applies, so do not assume a 2026 battery carries a 30% credit.
- Rebates and utility subsidies
- Separately from all of the above, the IRS page notes that public utility subsidies for buying or installing clean energy property are subtracted from qualified expenses, and that some rebates are treated as purchase-price adjustments.
How to check your own position in ten minutes
- Open the IRS residential clean energy credit page and read the "How it works" section yourself. It is short.
- Ask any installer quoting a federal credit to state, in writing, the authority for it and the placed-in-service date they are relying on.
- If the answer changes whether you buy, spend an hour with a CPA before spending tens of thousands on your roof.
Nothing on this page is tax advice. It states what the IRS page said on this page's updated date, and we correct it in place when that page changes.