The 2026 Homeowner's Guide to the Federal Solar Tax Credit

Before you sign any installation contract, you should understand exactly how the federal credit works, because most of the financial math you see in a sales pitch leans on it heavily. The Residential Clean Energy Credit lets you subtract 30% of what you paid for a qualifying solar system directly from the federal income tax you owe for the year you turn the system on.

Notice the word 'owe.' This is a credit, not a refund. If your total federal tax bill for the year is $4,000 and your credit is worth $9,000, you do not get a $5,000 check from the Treasury. You wipe out this year's tax and carry the unused $5,000 forward to next year, and the year after if needed.

Eligible costs are broader than people expect. Panels and inverters are obvious. So are racking, wiring, sales tax, electrician labor, the cost of pulling permits, and even the inspection fees your city charges. If you add a battery with at least 3 kWh of capacity, that battery qualifies too, whether you install it at the same time as the panels or years later.

Roof work is where homeowners get into trouble. Replacing your shingles before installation is generally not eligible, even if the installer insists the new roof is 'part of the project.' The IRS has been consistent on this: structural roof components do not count, because they would exist whether or not you went solar. Specialized solar roofing products like integrated solar shingles are treated differently and can qualify in full.

You claim the credit on IRS Form 5695, which you attach to your normal 1040. Line 1 is where the solar costs go. The form walks you through the carryforward calculation if your credit exceeds your liability. Keep your final invoice, your interconnection approval letter from the utility, and the permission-to-operate date in a folder. If you ever get audited, those three documents are what the auditor will ask for.

One practical warning. The credit attaches to the person who owns the system. If you sign a lease or a power purchase agreement, the leasing company owns the equipment and keeps the credit. That is a big reason their monthly payment looks cheap on paper.

Lastly, the 30% figure is the rate set by the Inflation Reduction Act through 2032, with planned step-downs after that. Congress has changed solar incentives before and can do it again, so if you are sitting on a quote, the safest assumption is that this year's rate is the best one you are guaranteed to see.