Federal Solar Tax Credit 2025: How to Claim Your 30% ITC
The 30% federal Investment Tax Credit (ITC) is the single biggest solar incentive available to US homeowners — worth an average of $7,500. Here's exactly how it works, what qualifies, how to claim it, and when it starts to step down.
Muhammad founded KilowattKit after spending hours trying to decode confusing electricity bills — and realising there were no simple, jargon-free tools to help ordinary homeowners understand their energy costs. He researches electricity rates, EV charging, solar payback, and heat pump economics across the US, UK, Canada, and Australia.
Federal ITC at a Glance
How the ITC Works
The solar Investment Tax Credit is a dollar-for-dollar reduction in your federal income tax bill. Unlike a rebate (which gives you money back), a tax credit reduces what you owe to the IRS. If your credit is larger than your tax liability in a given year, you can carry the remainder forward to the following year.
Worked example: 8kW system in Texas
What Qualifies for the 30% Credit
✅ Eligible costs
- Solar panels (any brand or type)
- Inverters and microinverters
- Mounting hardware and racking
- Wiring and electrical components
- Battery storage (≥75% solar-charged)
- Installation and labor costs
- Permitting and inspection fees
- Sales tax on eligible equipment
❌ Not eligible
- Roof repairs done separately
- Extended warranties or service plans
- Grid-scale or off-site solar
- Batteries not charged ≥75% from solar
- Leased systems (the leasing company claims it)
- Rental properties you don't occupy
ITC Step-Down Timeline
| Year(s) | Credit rate | Credit on $25k system | Action |
|---|---|---|---|
| 2022–2032 | 30% | $7,500 | ✅ Best time to install |
| 2033 | 26% | $6,500 | ⚠️ Credit reduced by $1,000 |
| 2034 | 22% | $5,500 | ⚠️ Credit reduced by $2,000 |
| 2035+ | 0% | $0 | ❌ Credit expires (residential) |
Note: Congress may extend the credit again before 2035. Commercial solar (ITC Section 48) has different timelines and rules. Figures correct as of May 2026 — verify at irs.gov before filing.
How to Claim the Credit (Step by Step)
Keep your signed contract, installer invoice, and proof of payment. Note the full system cost including all eligible components.
Enter your total qualified solar costs on Part I of Form 5695 (Residential Energy Credits). Line 6a is the total system cost; the 30% credit appears on line 6b.
The credit from Form 5695 flows to Schedule 3 (Line 5), then to your Form 1040. It reduces your total tax liability, not your taxable income — dollar-for-dollar.
If the credit exceeds your tax liability, the remainder carries forward to next year's return. Note this on Form 5695 and track the carryforward amount.
⚠️ Key things to know
- You need tax liability. The ITC is non-refundable — it can reduce your tax bill to zero but won't generate a refund beyond that. If you have no federal income tax liability, you cannot use the credit (though the carryforward still applies).
- Leased systems don't qualify. If you lease your solar panels or enter a Power Purchase Agreement (PPA), the leasing company owns the system and claims the ITC. Make sure you're buying, not leasing.
- State taxes are separate. The federal ITC only applies to federal income tax. Some states have their own separate solar tax credits — check your state's rules.
- Use a tax professional. While Form 5695 is straightforward, a CPA familiar with energy credits can ensure you capture every eligible dollar and handle carryforward correctly.
The federal 30% credit is just the start. Many states offer additional rebates, income tax credits, SRECs, and property/sales tax exemptions that can cut your cost even further.