The 30% Federal Solar Tax Credit, explained.

The headline rules

The credit equals 30% of the qualifying expenditures for a residential solar electric system placed in service in tax years 2022 through 2032. It steps down to 26% for 2033 and 22% for 2034, then expires for residential installations beginning in 2035 unless Congress extends it again.

The credit is non-refundable — it offsets income tax you owe, not your gross income — but unused credit carries forward indefinitely under current law. There is no income cap and no lifetime dollar limit.

Statutory basis: 26 U.S.C. § 25D, as amended by §13302 of the Inflation Reduction Act of 2022 (P.L. 117-169). IRS guidance: irs.gov/credits-deductions/residential-clean-energy-credit.

What qualifies as a "qualifying expenditure"

The credit applies to the cost of a "qualified solar electric property" installed on or in connection with a dwelling unit located in the United States and used as a residence by the taxpayer. The IRS interprets this broadly to include essentially every component required to place the system in service:

• Solar PV modules and inverters.
• Mounting equipment, racking, and roof penetrations.
• Wiring, conduit, disconnects, and the production meter.
• Labor costs for on-site preparation, assembly, and installation.
• Permitting fees and inspection costs.
• Energy storage (batteries) with capacity ≥ 3 kWh, when installed in conjunction with or retrofit to an existing solar system, per the 2022 IRA amendments.

Notable items that do not qualify: financing fees and interest, extended service warranties priced separately from the system, electrical-panel upgrades that are not "necessary to enable" the solar installation, and roof replacement that goes beyond what is required to support the PV mounting.

Worked example: a $24,000 California install

Suppose a homeowner installs an 8 kW system for $24,000 (gross), placed in service in 2025. The qualifying expenditure is $24,000; the credit is:

$24,000 × 30% = $7,200

That $7,200 is claimed on Form 5695, Part I, then carried to Schedule 3 of Form 1040, Line 5a. It reduces your federal income tax dollar-for-dollar.

The "non-refundable" trap

Because the credit is non-refundable, you must have at least $7,200 of federal income tax liability (line 22 of Form 1040, before credits) in the year you install to use the full credit at once. If your liability is lower — for example, a retiree on Social Security plus modest pension income may owe only $2,000 in federal tax — you claim what you can use in year one and carry the remainder forward.

Carryforward example for the same install:

Current statutory language permits carryforward "to each of the succeeding taxable years" without an upper bound, although a careful CPA will note that this provision is itself the product of past legislative tinkering and could change.

AMT and high-income taxpayers

The Residential Clean Energy Credit may be claimed against the Alternative Minimum Tax, which removes a historical pain point for higher-income filers. If you are in AMT territory, confirm the mechanics with your CPA — the interaction with state taxes is the most common source of error.

Eligibility specifics

• Residency requirement. The property must be located in the United States and used as a residence by the taxpayer. A primary residence, a second home, and a vacation property all qualify. A property held strictly for rental — where the taxpayer does not use it as a residence at all — does not qualify under §25D (commercial credits exist separately under §48).
• New equipment. The components must be new; used or refurbished panels do not qualify.
• Ownership. You must own the system. A solar lease or power-purchase agreement (PPA) means the third-party owner claims the credit, not you. The homeowner-economics implication is large: PPAs typically price the lost credit value into your bill via a higher per-kWh charge.
• Placed-in-service date. The credit is claimed in the tax year the system is operational and inspected, not the year you sign a contract or pay a deposit.

State and utility incentives — stacking rules

Most state and utility incentives are additive to the federal credit, but their interaction with the credit's basis varies:

• Utility rebates typically reduce the qualifying expenditure before the 30% is calculated. A $1,000 rebate on a $24,000 system means your federal credit is 30% of $23,000 = $6,900, not $7,200.
• State income tax credits generally do not reduce the federal basis. You claim both, on separate forms.
• Performance-based incentives (PBIs), such as New York's NY-Sun Megawatt Block, are usually paid to the installer and never appear on your invoice — but they often manifest as a discounted gross price, which similarly reduces your basis.

Common ways the credit is lost or reduced

1. Signing a PPA or lease. Third-party-owned systems forfeit the homeowner's claim entirely.
2. Insufficient tax liability with poor planning. A retiree in a low bracket may take a decade to absorb a $7,000 credit.
3. Mis-allocated invoice line items. If your installer separates "qualifying" from "non-qualifying" costs incorrectly on the invoice, the IRS will scrutinize the deduction. Insist on a clean, itemized invoice you can defend if audited.
4. Property used for business. If a portion of the home is claimed as a home office and the solar serves that portion, the credit is split between §25D (residential) and §48 (commercial) and the paperwork gets meaningfully more complex.

What you should do

• Project your federal income tax liability for the install year before signing a contract, and budget the carryforward years if needed.
• Keep your itemized installer invoice and final inspection certificate together with your tax records for at least seven years.
• If your tax situation is non-trivial (AMT exposure, low-income retirement, mixed residential/business use, multiple rental properties), pay for an hour of CPA time before installation. It is the highest-leverage dollar in the project.

This guide is editorial reference material and not tax advice for your specific situation. See our terms of use. Last reviewed May 2025; statutory citations verified against the text of 26 U.S.C. § 25D as of that review date.