The federal solar Investment Tax Credit (ITC) is one of the most valuable financial incentives available to U.S. homeowners right now. It lets you deduct 30% of your total solar system cost directly from your federal income taxes — not as a deduction, but as a dollar-for-dollar credit. On a $25,000 system, that’s $7,500 straight off your tax bill.
But there are rules. You have to own the system, you need enough tax liability, and you need to file the right form. This guide covers everything you need to know to claim it correctly in 2026.
What Is the Federal Solar Tax Credit?
The Investment Tax Credit (ITC) for solar was originally created in 2006 and has been extended and expanded multiple times since. The Inflation Reduction Act of 2022 locked it in at 30% through December 31, 2032, then it steps down to 26% in 2033, 22% in 2034, and expires for residential installations in 2035 unless Congress acts again.
It applies to the total installed cost of your solar system — panels, inverter, mounting hardware, wiring, labor, battery storage (if installed at the same time), and even the cost of permitting and inspection fees.
How Much Is the Credit Worth?
Here’s what 30% looks like across different system sizes:
| System Size | Typical Installed Cost | 30% ITC Value | Your Net Cost |
|---|---|---|---|
| 5 kW (small home) | $15,000 | $4,500 | $10,500 |
| 8 kW (average home) | $24,000 | $7,200 | $16,800 |
| 10 kW (larger home) | $30,000 | $9,000 | $21,000 |
| 12 kW + battery | $42,000 | $12,600 | $29,400 |
The credit applies to the full system cost — including battery storage. A $10,000 Tesla Powerwall added to your solar install gets 30% back too, making it one of the strongest battery incentives available.
Who Qualifies for the Solar Tax Credit?
You qualify if you meet all four of these conditions:
1. You Own the Solar System
This is the big one. You must purchase the system outright (cash or solar loan). If you lease solar panels or sign a Power Purchase Agreement (PPA), the solar company owns the equipment — and they claim the tax credit, not you. This is one of the main reasons buying vs. leasing matters so much financially.
2. It’s Installed on Your Primary or Secondary Residence
The system must be at a U.S. home — your main home or a second home (vacation home). It doesn’t cover rental properties where you don’t live, though there are separate commercial solar credits for investment properties.
3. The System Is New (Original Installation)
The credit applies to new solar installations only — not used equipment or systems you’re inheriting from a previous homeowner. If you buy a home with existing solar that the previous owner already claimed the credit on, you don’t get to claim it again.
4. You Have Federal Tax Liability
The ITC is a non-refundable tax credit, which means it can reduce your federal tax bill to zero — but the IRS won’t send you a check for the remainder if the credit exceeds what you owe. However, any unused portion rolls over to the following tax year. So if your credit is $7,200 but you only owe $5,000 in taxes this year, you carry the remaining $2,200 forward to 2027.
Understanding your payback period is closely tied to when you claim this credit. See our solar payback period guide for how the ITC fits into the full financial picture.
What Costs Are Included in the Credit?
The IRS allows you to include all of the following in your credit calculation:
- Solar panels (the modules themselves)
- Inverter(s) — string, microinverters, or power optimizers
- Mounting hardware and racking
- Electrical wiring and conduit
- Battery storage — if charged primarily by solar (as of 2023, standalone batteries also qualify)
- Labor costs for installation
- Permitting and inspection fees
- Sales tax on eligible equipment
What’s not included: roof repairs or replacement made to accommodate the solar system, landscaping or tree removal, and any portion of the system cost already covered by a state rebate that is excluded from your gross income.
How to Claim the Solar Tax Credit: Step by Step
Step 1: Install Your System and Get Your Final Invoice
The credit applies in the tax year your system is placed in service — meaning it’s installed, operational, and passed inspection. Keep your full itemized invoice showing every cost component.
Step 2: Complete IRS Form 5695
This is the residential energy credits form. You’ll fill out Part I (Residential Clean Energy Credit). Enter your total qualified solar costs on Line 1, calculate 30%, and carry that number to your Form 1040 Schedule 3, Line 5.
Step 3: Attach to Your Federal Tax Return
File Form 5695 with your regular federal tax return (Form 1040). Most major tax software (TurboTax, H&R Block, FreeTaxUSA) will walk you through this automatically once you indicate you installed solar. If you use a CPA, just hand them your solar invoice and let them know you installed solar this year.
Step 4: Track Any Carryover
If your credit exceeds your tax liability this year, the software will automatically calculate your carryover amount for the following year. Keep a record of this for your 2027 return.
State Solar Tax Credits: Stacking on Top of the ITC
Many states offer additional solar incentives that stack directly on top of the 30% federal credit:
| State | State Tax Credit | Other Incentives |
|---|---|---|
| New York | 25% (up to $5,000) | NY-Sun rebate program |
| South Carolina | 25% (up to $3,500/year) | Property tax exemption |
| Massachusetts | 15% (up to $1,000) | SMART program payments |
| Maryland | 30% (up to $1,000) | Rebate programs vary by utility |
| Hawaii | 35% (up to $5,000) | Net metering |
| Texas | None | Property tax exemption (100% of added value) |
| California | None | Net metering (NEM 3.0), SGIP battery rebate |
| Florida | None | Property + sales tax exemption |
Even states with no income tax credit often offer property tax exemptions (your home’s value increases from solar, but you don’t pay higher property taxes on that increase) and sales tax exemptions (no sales tax on the purchase of solar equipment). These add up.
Common Mistakes to Avoid
Assuming You Can Get a Refund Check
The ITC is non-refundable — it brings your tax bill to zero but won’t generate a refund beyond that. If you paid little or no federal income tax last year, confirm you’ll have enough liability this year before counting on the full credit immediately. The carryover provision helps, but it can take 2–3 years to fully use in some cases.
Leasing Instead of Buying
Solar leases and PPAs are marketed aggressively, and some installers push them hard. If you sign a lease, the company keeps the 30% tax credit — not you. That’s your $7,000+ going to them instead of you. Buying outright or with a solar loan almost always wins financially.
Not Including All Eligible Costs
Many homeowners forget to include labor, permits, and the inverter in their credit calculation. Your solar installer should provide a complete itemized invoice — use the full number, not just the panel cost.
Installing in December and Waiting a Full Year
The credit applies in the tax year the system is placed in service. If your system passes inspection on December 28, 2026, you claim it on your 2026 taxes (filed in early 2027). You don’t have to wait until 2027 to install to claim on 2027 taxes.
Frequently Asked Questions
Can I claim the tax credit if I finance my solar system with a loan?
Yes. As long as you own the system (not a lease), you can claim the full 30% credit regardless of whether you paid cash or took out a solar loan. Many homeowners use the tax credit refund to pay down the loan principal early.
Does the tax credit apply to a battery-only installation?
As of January 1, 2023, yes — standalone battery storage systems (without solar panels) now qualify for the 30% ITC if they have a capacity of at least 3 kWh. This is a major change from prior years when batteries had to be paired with solar to qualify.
What if I don’t owe any federal taxes?
The unused credit carries forward to the next tax year. If you consistently owe little in federal taxes, the credit may take several years to fully use. It doesn’t expire during the current ITC window (through 2032), so you have time to use it up.
Does the solar tax credit affect my state taxes?
The federal ITC reduces your federal tax bill only. However, some states also reduce your state taxable income because the federal credit reduces your federal adjusted gross income in certain calculations. Check with a tax professional in your state for specifics.
Can I claim the credit on a home I’m building?
Yes — solar installed on a new home construction qualifies. The credit applies in the year the home is completed and you occupy it, not when the solar is installed during construction.
Will the tax credit go away?
The 30% rate is locked in through December 31, 2032 via the Inflation Reduction Act. It then steps down to 26% in 2033 and 22% in 2034, expiring for residential use in 2035 unless Congress extends it again. Historically, Congress has extended solar incentives each time they’ve approached expiration.
Bottom Line: The 30% Credit Is Real Money — Don’t Leave It on the Table
The federal solar tax credit is one of the most straightforward government incentives out there. Install a solar system you own, file Form 5695, and get 30% back. On a typical home system, that’s $6,000–$10,000 in your pocket that directly shortens your payback period and improves your long-term return.
The one thing that trips people up is the non-refundable part — make sure you have enough tax liability to use it (or plan for the carryover). And always buy, don’t lease, if claiming the credit matters to you.
Now that you understand the incentives, you’re ready for the big one: how much does a complete solar system actually cost in 2026? That’s our next guide — a full breakdown by system size, state, installer type, and financing option.
Also worth reading: our honest breakdown of solar pros and cons — including the financial risks most solar companies won’t mention upfront.
Solar Clarity Guide 
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