Investment Tax Credit (ITC)

The Investment Tax Credit (ITC), also known as the federal solar tax credit, is a dollar-for-dollar reduction in your federal income tax liability equal to a percentage of the cost of a qualifying solar energy system. It is the single largest financial incentive for residential and commercial solar installations in the United States and has been a primary driver of solar adoption since its introduction.

The Inflation Reduction Act of 2022 set the residential ITC at 30% for systems installed from 2022 through 2032. This means a solar system that costs twenty thousand dollars earns a six-thousand-dollar federal tax credit. The credit applies to the total installed cost including panels, inverters, batteries, racking, wiring, labor, and permitting. For 2033, the credit steps down to 26%, and for 2034 it drops to 22%, unless Congress extends it.

The ITC is a tax credit, not a deduction or rebate. A tax credit directly reduces the amount of tax you owe — if you owe eight thousand in federal taxes and have a six-thousand-dollar solar ITC, you pay only two thousand. If your tax liability is less than the credit amount in the year of installation, the unused portion can be carried forward to subsequent tax years.

Battery storage qualifies for the ITC even when installed without solar panels, as long as the battery has a capacity of at least 3 kWh. This provision was added by the Inflation Reduction Act and has significantly boosted the economics of adding battery backup to both new and existing solar systems.

To claim the ITC, you must own the solar system — leased systems and PPA arrangements do not qualify for the homeowner (the leasing company claims the credit instead). The system must be installed at your primary or secondary residence (for residential credit) and placed in service during the applicable tax year.