The solar tax credit lets you deduct a percentage of your solar installation costs directly from your federal income tax bill
The Investment Tax Credit (ITC) for solar works like this: when you install a solar energy system on your home or business, you can claim a credit on your federal tax return equal to a percentage of what you paid. Unlike a deduction, which reduces your taxable income, a credit reduces the actual tax you owe dollar-for-dollar. If your tax bill is $5,000 and you claim a $2,000 solar credit, you now owe $3,000.
The credit applies to the total cost of your system — the panels, inverter, wiring, labor, and installation. It does not matter whether you paid cash or financed the system. The percentage of your cost you can claim has changed over time and is scheduled to step down in future years, so the year you install matters.
You claim the credit on IRS Form 3468 (Investment Credit), which you file with your regular 1040 tax return. The credit is available only if you own the system outright or through a loan. If you lease the panels or use a power purchase agreement, the leasing company claims the credit instead, not you.
Key Takeaways
- The solar tax credit reduces your federal income tax bill by a percentage of your installation costs, not your taxable income.
- The credit percentage has declined over time — it was 30% for systems installed through 2032, then steps down to 26% in 2033 and 22% in 2034.
- You must own the solar system outright or through a loan to claim the credit; leased systems do not may have access to.
- You claim the credit on Form 3468 filed with your annual tax return, and unused credits can carry forward to future years if your tax bill is too low.
- The credit covers the full cost of equipment and installation, including labor and permitting fees.
What costs the credit actually covers
The solar credit is broad. It includes the solar panels themselves, the inverter (which converts DC power to AC), wiring, mounting hardware, labor to install everything, and permitting and inspection fees. If you paid for a battery system installed at the same time as your solar panels, that battery cost is also covered.
The credit does not cover costs that are separate from the solar system itself. If you paid to upgrade your electrical panel or roof before installing solar, those costs do not may have access to. Maintenance, repairs, or monitoring services after installation also do not count. The rule is: if the cost is necessary to make the solar system work on your property, it is in; if it is a separate project, it is out.
How the credit percentage has changed and will change
The credit percentage is not fixed. Congress has adjusted it multiple times, and future reductions are already written into law. For systems installed in 2022 through 2032, the credit is 30% of your total costs. Starting in 2033, it drops to 26%. In 2034 and beyond, it is 22%. After 2034, the credit expires entirely unless Congress extends it.
This schedule matters for your timing. A $10,000 system installed in 2032 gives you a $3,000 credit. The same system installed in 2033 gives you $2,600. The difference is real money, and many homeowners have accelerated their installation plans to lock in the higher percentage.
What happens if your tax bill is smaller than your credit
If you owe $2,000 in federal income tax but your solar credit is $3,000, you do not lose the extra $1,000. Instead, the unused portion carries forward to your next tax year. If you owe $2,500 the following year, you use $1,000 of the carried-forward credit against that bill, leaving $500 to carry forward again.
This carryforward continues indefinitely until you use up the entire credit. It is one reason the credit is valuable even for people with lower tax bills — you can use it over multiple years. However, you cannot carry the credit backward to a prior year or receive it as a refund.
How to claim the credit on your tax return
You claim the solar credit on IRS Form 3468, titled "Investment Credit." This form asks for the cost of your system, the year it was installed, and the percentage you are claiming. You then attach Form 3468 to your Form 1040 when you file your annual return.
Your solar installer typically provides a document showing the total system cost and the date of installation. Keep this documentation along with your receipts and invoices. The IRS does not require you to submit these with your return, but you must have them if the IRS ever asks questions about your claim.
If you use tax software, most programs walk you through the questions on Form 3468. If you work with a tax preparer, give them the cost breakdown from your installer and let them handle the form. The process is straightforward once you have the numbers.
Who can and cannot claim the credit
You can claim the credit if you are a U.S. citizen or resident alien and you own the solar system. Ownership means you either paid cash for it or took out a loan in your name. The system must be installed on your primary residence, a second home, or a business property you own.
You cannot claim the credit if someone else owns the system. This includes leased solar panels, where the leasing company retains ownership and claims the credit themselves. It also includes power purchase agreements (PPAs), where you buy the electricity the panels produce but the company owns the equipment. In both cases, the financial benefit goes to the owner, not to you.
There is no income limit to claim the solar credit. High earners and low earners are treated the same. There is also no limit on the dollar amount of the credit — if your system costs $50,000, you can claim the full percentage of that cost.
How the credit interacts with state and local incentives
Many states and utilities offer their own solar rebates or credits. These work separately from the federal credit. You can claim both. However, some state programs require you to reduce your system cost by the federal credit before calculating the state incentive. Check your state's rules before you install.
For example, if your system costs $10,000 and you claim a $3,000 federal credit, some states will calculate their rebate on the remaining $7,000. Others will calculate on the full $10,000. The difference affects how much total money you receive. Your installer or your state's energy office can tell you how your state handles this.
Frequently Asked Questions
Can I claim the solar credit if I financed my system with a loan?
Yes. The credit applies to the total cost of the system, regardless of how you paid for it. Whether you paid cash, took out a loan, or used a combination, you claim the credit based on the full installed cost. The loan itself does not affect your may be able to access.
What if I install solar panels in December — do I claim the credit that year or the next?
You claim it in the year the system is installed and operational. If your panels are turned on in December, you claim the credit on that year's tax return, even if you file in April of the following year. The installation date, not the filing date, determines which year's credit you use.
Can I claim the credit if I am self-employed or own a business?
Yes, if the solar system is installed on a business property you own. Business owners use Form 3468 the same way homeowners do. The credit reduces your business tax liability. Consult a tax preparer if you have questions about how it interacts with your business structure.
What if I sell my house after installing solar — do I lose the credit?
No. You claim the credit on the tax return for the year the system was installed, regardless of whether you sell the house later. The credit is tied to the installation year, not to your ownership of the property going forward. The new owner cannot claim the credit again.
Does the solar credit reduce my taxable income or my tax bill?
It reduces your tax bill directly. A credit is different from a deduction. A $3,000 deduction might reduce your tax bill by $600 (depending on your tax bracket), but a $3,000 credit reduces your bill by exactly $3,000. Credits are more valuable than deductions of the same amount.