Federal Solar Tax Credit in 2026

Section 25D ended for new residential expenditures after 2025

The IRS currently states that the Residential Clean Energy Credit is not available for property placed in service after December 31, 2025. The IRS transition FAQ also states that Section 25D is not allowed for expenditures made after December 31, 2025.

For ordinary original installation, the key timing rule is especially important: the expenditure is generally treated as made when the original installation is completed. That means a homeowner should not assume that signing a contract, making a deposit or paying the full price during 2025 preserved the credit if installation was not completed until 2026.

Paid in 2025, installed in 2026: the payment date does not save the old credit

This is one of the most important transition questions for homeowners. The IRS FAQ specifically addresses property paid for on or before December 31, 2025 but installed after that date. Its answer is no: when original installation is completed after December 31, 2025, the expenditure is treated as made after the deadline for Section 25D.

If a 2026 installer proposal still shows a 30% federal homeowner credit because a deposit was made in 2025, ask for the legal basis in writing and verify it independently before using that amount in payback or financing decisions.

Installed in 2025, tax return filed in 2026 is a different situation

The expiration date does not mean an eligible 2025 installation had to be claimed before December 31, 2025. The IRS says the credit is claimed for the tax year when the residential clean energy property is installed. A qualifying installation completed during 2025 would normally be addressed on the 2025 tax return, which is commonly filed during 2026.

The IRS also states that excess unused Residential Clean Energy Credit may be carried forward to reduce tax owed in future years. Carryforward questions depend on the taxpayer's own return and should not be confused with eligibility for a brand-new 2026 installation.

New residential batteries in 2026 do not keep the former Section 25D credit

Battery storage technology with at least 3 kWh of capacity was qualified residential clean energy property while Section 25D was available. But the same termination applies to a new residential battery installation completed after December 31, 2025.

Do not let a battery add-on silently reintroduce the old 30% federal homeowner credit into a 2026 solar proposal. Evaluate any state, utility or battery-specific program separately and verify its current rules.

Why older solar calculators and installer proposals can overstate 2026 savings

A calculator written before the law changed may still reduce the project price by 30% automatically. On a $30,000 project, that stale assumption creates a $9,000 difference before any other modeling assumption is considered.

Home Solar Atlas therefore does not automatically subtract the former Section 25D credit from a new 2026 homeowner calculation. The Quote Analyzer also flags proposal text that still relies on a 30% federal residential credit so the homeowner can verify whether the sales presentation is using outdated assumptions.

State, local and utility incentives can still change the economics

The end of the homeowner Section 25D credit does not mean every solar or battery incentive disappeared. State tax treatment, local programs, utility rebates, storage incentives and export-compensation rules are separate programs with their own eligibility and timing.

Use Home Solar Atlas to discover location-specific programs, then verify the current amount, deadline, funding status and eligibility directly with the issuing agency or utility before counting it as money available to the project.

Business and third-party tax rules are not a replacement homeowner credit

Federal clean-electricity tax provisions still exist for qualifying businesses, facilities and other taxpayers. Those rules are not automatically interchangeable with the former Section 25D credit for a homeowner buying a residential system.

If a lease, PPA or other third-party ownership proposal says the provider receives a federal tax benefit, evaluate the contract price, payment schedule, escalator, transfer and buyout terms on their own. Do not assume the homeowner personally receives the same credit.

2026 proposal checklist: verify every incentive before signing

• Ask for the project price before incentives and the price after each incentive separately.
• Identify who receives each incentive: homeowner, installer, third-party system owner or another entity.
• Verify whether the proposal assumes the expired 30% Section 25D homeowner credit.
• For a 2025-to-2026 transition project, verify the actual original installation completion date.
• Do not treat a projected tax benefit as guaranteed cash available for a solar-loan prepayment.
• Verify state, local and utility programs directly before using them in payback math.

Frequently asked questions

Tax-information boundary

Home Solar Atlas provides planning information, not individualized tax advice. Tax eligibility can depend on ownership, installation timing, residence facts, tax liability and other circumstances. Use current IRS guidance and a qualified tax professional for a filing decision.