What Is the Federal Solar Tax Credit?
The federal solar tax credit — formally called the Residential Clean Energy Credit, and before that the Investment Tax Credit (ITC) — is the single most powerful financial incentive for homeowners going solar in the United States. Established in 2006 and repeatedly extended by Congress, the credit currently lets you deduct 30% of your total solar installation cost directly from your federal income tax liability, dollar for dollar.
To understand why this matters: a tax deduction reduces your taxable income, which only indirectly lowers your tax bill. A tax credit reduces your actual tax bill directly. If you owe $8,000 in federal taxes and have a $7,500 solar credit, you pay only $500. That's the power of a credit vs. a deduction — and it's why the ITC is worth tens of thousands of dollars to the average homeowner over the life of a solar system.
The 30% rate was restored and locked in through 2032 by the Inflation Reduction Act of 2022 (IRA), signed into law by President Biden. Before the IRA, the credit had stepped down to 22% and was heading toward expiration for residential installations. The IRA's passage was a landmark moment for the solar industry — and for homeowners considering going solar.
Want to see your exact credit amount? Use our Solar Tax Credit Calculator to get a personalized estimate in under 60 seconds.
How Much Is the Solar Tax Credit Worth in 2026?
The credit is worth exactly 30% of your total eligible system cost — panels, labor, permits, wiring, inverters, battery storage, and other installation costs all count. Here is what that looks like at common system sizes for the average US homeowner in 2026:
| System Size | Gross System Cost | 30% Credit Amount | Net Cost After ITC | Typical Home Size |
|---|---|---|---|---|
| 5 kW | $14,000 | $4,200 | $9,800 | Small home / condo |
| 7 kW | $19,600 | $5,880 | $13,720 | 1,200–1,800 sq ft |
| 8 kW | $22,400 | $6,720 | $15,680 | 1,800–2,400 sq ft |
| 10 kW | $28,000 | $8,400 | $19,600 | 2,400–3,200 sq ft |
| 12 kW | $33,600 | $10,080 | $23,520 | Large home or EV |
| 10 kW + Battery | $38,000 | $11,400 | $26,600 | Home + backup storage |
| 15 kW | $42,000 | $12,600 | $29,400 | Very large or pool home |
Note: "Gross system cost" includes all eligible costs — panels, inverter, racking, wiring, labor, permits, and battery storage. It does not include the cost of a new roof, even if you replace your roof at the same time as the solar installation (unless the roofing material is specifically part of the solar installation, such as solar shingles).
The average American solar installation in 2026 runs $20,000–$28,000, putting the typical tax credit at $6,000–$8,400. For homeowners adding a battery like the Tesla Powerwall ($10,000–$15,000 installed), the credit grows proportionally, often reaching $9,000–$12,000 total.
For a full breakdown of solar installation costs, see our guide: How Much Do Solar Panels Cost in 2026?
What Qualifies for the 30% Tax Credit?
The IRS allows you to include the following costs in your solar tax credit calculation under IRC Section 25D:
- Solar photovoltaic panels — The panels themselves, including framing and mounts.
- Labor costs for installation — On-site preparation, assembly, and original installation labor. This includes all hours billed by the installation crew.
- Balance of system equipment — Inverters (string, microinverter, or hybrid), combiner boxes, disconnects, wiring, conduit, and monitoring equipment.
- Permitting fees and inspection costs — Building permits, electrical permits, and utility interconnection fees paid to obtain approvals to install and operate the system.
- Battery storage systems — Since the IRA (August 2022), standalone battery storage systems with a minimum capacity of 3 kWh qualify, even if not connected to solar panels. Tesla Powerwall, Enphase IQ Battery, LG RESU, Franklin WH, and similar products all qualify.
- Solar water heaters — Systems that heat household water using solar energy qualify, provided at least 50% of the energy used to heat water in the home is from solar energy and the system is certified by the Solar Rating Certification Corporation (SRCC).
- Small wind turbines — Residential wind turbines up to 100 kW in rated capacity that generate electricity for your home qualify under the same credit.
- Fuel cell systems — Residential fuel cell systems with at least 0.5 kW capacity qualify (credit capped at $500/0.5 kW for fuel cells).
- Structural components integral to the solar system — If you install solar shingles or solar roof tiles (e.g., Tesla Solar Roof), the portion of the roofing material that is the solar component qualifies.
The key test from the IRS: the property must be your primary or secondary residence, you must own (not lease) the system, and the installation must be placed "in service" (fully installed and operational) during the tax year in which you claim the credit.
What Does NOT Qualify?
Several costs homeowners commonly assume qualify for the credit do not — and including them could create issues in an IRS audit. The following are explicitly excluded:
- Roof replacement or repair costs — Even if you replace your entire roof the week before your solar panels go on, the roofing labor and materials do not count toward the credit. Only the solar-specific structural components (like solar shingles) qualify.
- Electrical panel upgrades — A panel upgrade (replacing your 100A panel with a 200A panel) done to support solar does not qualify under the residential ITC. Note: some states have separate rebates that cover panel upgrades.
- Extended warranty or service plans — Post-installation service contracts, annual monitoring fees, or maintenance agreements do not qualify.
- Solar systems on rental property — If the property is a pure investment rental where you do not personally reside, the residential Section 25D credit does not apply. A separate commercial ITC under Section 48 may apply.
- Leased systems or PPAs — You must own the system. If you lease the panels or sign a power purchase agreement (PPA), the leasing company claims the credit, not you.
- Pool heating systems — Solar systems used exclusively to heat swimming pools or hot tubs do not qualify.
- Generator systems — Standard backup generators (gas or propane) do not qualify, even if paired with solar.
How to Claim the Solar Tax Credit (Step-by-Step)
Claiming the solar ITC is straightforward. Here is the exact process:
- Install and "place in service" your solar system. The credit applies to the tax year in which your system was fully installed and operational — meaning interconnected to the grid (or battery complete for off-grid). If your system was installed in December 2026, you claim it on your 2026 return filed in early 2027.
- Gather your documentation. You need: (a) your final installer invoice showing the total system cost, (b) a receipt or statement showing you paid for the system (proof of ownership, not a lease), and (c) any permits or inspection certificates showing the installation is complete.
- Complete IRS Form 5695. This is the "Residential Energy Credits" form. Part I covers the Residential Clean Energy Credit (solar, battery, wind). You will fill in Lines 1–14 to calculate your credit.
- Transfer the credit to your Form 1040. The final credit amount from Form 5695 Line 14 goes to Schedule 3 (Additional Credits and Payments), Line 5. Schedule 3 flows to Form 1040 Line 20.
- File your return. Submit your federal return with Form 5695 attached. You do not need to submit your installer invoice with the return, but you should keep it with your tax records for at least 7 years in case of audit.
If you use TurboTax, H&R Block, TaxAct, or any other major tax software, the solar credit is handled through a guided interview — you simply answer "did you install solar panels?" and enter the cost. The software handles the form-filling automatically.
Need help comparing financing options to maximize your credit? See our Solar Financing Options Guide.
IRS Form 5695: Line-by-Line Walkthrough
Form 5695 is two pages. Part I (Lines 1–14) covers the Residential Clean Energy Credit. Here is what each relevant line means:
| Form 5695 Line | What to Enter | Example ($25,000 System) |
|---|---|---|
| Line 1 | Solar electric (photovoltaic) property costs | $25,000 |
| Line 2 | Solar water heating property costs (if applicable) | $0 |
| Line 3 | Wind energy property costs (if applicable) | $0 |
| Line 4 | Geothermal heat pump property costs (if applicable) | $0 |
| Line 5 | Battery storage technology costs (if applicable) | $0 (or add battery cost here) |
| Line 6 | Total (Lines 1–5 combined) | $25,000 |
| Line 7 | Multiply Line 6 by 30% (.30) — this is your credit | $7,500 |
| Lines 8–13 | Limitations based on your tax liability | Compare to actual tax owed |
| Line 14 | Your allowed credit for this year | Up to $7,500 (or carryforward) |
The limitation calculation on Lines 8–13 is where the credit may be reduced if your total federal tax liability is less than your credit. In that case, the excess carries forward — it is not lost. The carryforward amount is tracked on Line 16 (Carryforward to 2027).
Important: If you installed solar in 2026 and also qualify for the Energy Efficient Home Improvement Credit (Section 25C) for other upgrades like insulation, heat pumps, or windows, both credits appear on Form 5695 in different parts. They are independent and do not reduce each other.
Can You Carry Forward Unused Solar Tax Credits?
Yes — and this is one of the most misunderstood aspects of the ITC. If your solar tax credit exceeds your federal income tax liability in the year you install, the unused credit carries forward to the following tax year. There is no limit on how many consecutive years you can carry it forward, as long as the credit is still valid.
Example: You install an 8 kW solar system in 2026 for $22,400. Your 30% credit is $6,720. But your federal tax liability for 2026 is only $4,000. You use $4,000 of the credit to bring your tax bill to $0, and the remaining $2,720 carries to your 2027 return. If your 2027 tax liability is $5,000+, you use the remaining $2,720 to reduce it to $2,280.
You cannot receive a refund for the unused portion — the ITC is "non-refundable," meaning it can reduce your tax bill to $0 but you won't receive the excess back as cash. However, carryforward is nearly as good for most homeowners. If you typically owe $6,000+ in federal taxes per year, you will use the full credit within one or two years.
Very low-income households (those who owe little to no federal income tax) benefit least from the ITC. For these households, a solar lease or community solar subscription may provide a more direct financial benefit, though they come with their own trade-offs.
Does the Solar Tax Credit Apply to Batteries and Storage?
Yes — and this is one of the most significant expansions from the Inflation Reduction Act. As of August 16, 2022, standalone battery storage systems with a minimum capacity of 3 kWh qualify for the full 30% ITC, even when not connected to solar panels.
Before the IRA, batteries only qualified for the credit when charged exclusively by the co-installed solar system. The IRA removed that restriction entirely. Now a homeowner can install a battery storage system alongside an existing solar array (or completely independently) and claim the 30% credit on the full battery cost.
Qualifying battery systems include (but are not limited to):
- Tesla Powerwall 3 ($9,500–$11,500 installed)
- Enphase IQ Battery 5P and 10T ($7,000–$15,000 installed)
- Franklin WH aGate ($9,000–$14,000 installed)
- LG RESU Prime ($8,000–$13,000 installed)
- SunPower SunVault ($10,000–$18,000 installed)
- Panasonic EverVolt ($8,500–$14,000 installed)
On a $12,000 Tesla Powerwall installation, the 30% credit is $3,600. Combined with a $25,000 solar install ($7,500 credit), a homeowner adding battery backup has a total credit of $11,100 on a $37,000 combined system. This dramatically accelerates the payback period for battery-inclusive systems.
Solar Tax Credit and Home Sale: What Happens?
If you claim the solar tax credit and later sell your home, there are two important things to understand:
1. The tax credit is yours regardless of the home sale. Once you have claimed the ITC on your federal return, it is fully realized — you keep the credit. You do not need to repay it if you sell your home at any point after installation.
2. Your cost basis in the solar system may affect capital gains. The IRS requires you to reduce your home's cost basis by any credits received. In practice, this means the amount of the solar credit (30% of system cost) reduces your adjusted cost basis in the property. For most homeowners — particularly those who qualify for the primary residence exclusion ($250,000/$500,000) — this has no practical capital gains tax impact. However, homeowners with very large gains on highly appreciated properties should discuss this with a tax professional.
3. You transfer the physical asset. When you sell the home, the solar panels go with it (they are part of the real property). This typically increases your home's sale price — studies consistently show solar adds $10,000–$30,000 to home value in most markets. See our California solar guide for state-specific data on how solar affects home values in the largest solar market.
If you installed solar using a loan that has a remaining balance at the time of sale, you can pay it off at closing from sale proceeds, just like any home improvement loan. Leased systems are more complicated to transfer — buyers must qualify to take over the lease, which can complicate or delay sales.
When Does the Solar Tax Credit Expire?
The Inflation Reduction Act of 2022 locked in the 30% rate through 2032. Here is the full step-down schedule for residential installations as currently written in law:
| Year(s) | Residential ITC Rate | Notes |
|---|---|---|
| 2022–2032 | 30% | Current rate — locked in by IRA |
| 2033 | 26% | First step-down after 2032 |
| 2034 | 22% | Second step-down |
| 2035 onward | 0% | Credit expires for residential (no current extension) |
Commercial and utility-scale solar retains a permanent 10% credit after 2034. For residential homeowners, the financial case for acting sooner rather than later is strong — waiting from 2026 to 2034 means losing 8% of your system cost in credits. On a $25,000 system, the difference between claiming in 2026 (30% = $7,500) vs. 2034 (22% = $5,500) is $2,000 in your pocket.
Congress has extended the ITC multiple times historically — but each extension came after significant industry lobbying and is never guaranteed. The safest assumption for financial planning is to use the rates as currently legislated.
One important caveat: the step-down schedule has become politically unpredictable since 2025. As of the writing of this guide (March 2026), there are active discussions in Congress about both modifications and early phase-outs. The 30% rate is law through 2032, but homeowners should monitor legislative developments and not assume the current schedule is permanent beyond what is already enacted.
State Solar Tax Credits: Stacking With the Federal ITC
The federal ITC is independent of — and can be combined with — state solar incentives, local utility rebates, and other financial programs. This "stacking" of incentives is where sophisticated solar buyers maximize their savings.
Key state programs that stack with the federal ITC in 2026:
| State | State Tax Credit | Notes |
|---|---|---|
| New York | 25% (capped at $5,000) | Applies to gross system cost, independent of federal |
| Massachusetts | 15% (capped at $1,000) | Plus SMART program production incentive |
| Maryland | $1,000 flat credit | First-come basis, limited annual budget |
| South Carolina | 25% of cost (capped) | Strong stacking opportunity |
| Utah | 25% (capped at $1,600) | Residential solar credit |
| Arizona | 25% (capped at $1,000) | Plus property tax exemption on added value |
| California | No state income tax credit | But SGIP battery rebate, NEM 3.0 compensation |
| Texas | No state income tax | No state credit needed; no state income tax |
| Florida | No state income tax | Sales tax exemption on solar equipment (6% savings) |
Beyond income tax credits, many states and utilities offer:
- Property tax exemptions: Over 36 states exempt the added home value from solar from property taxes. This prevents your annual property tax bill from rising when solar increases your home's assessed value.
- Sales tax exemptions: Over 25 states exempt solar equipment from state sales tax, saving 4–9% on equipment costs.
- Net metering: Compensation for excess electricity your panels send to the grid. Rates and rules vary dramatically by state and utility.
- Utility rebates: Many utilities offer one-time cash rebates ($500–$2,500) for installing solar. These are typically available on a first-come, first-served basis with annual funding caps.
For a comprehensive view of your state's incentives, see our state-by-state guides. For example, California homeowners should review our detailed California Solar Guide, which covers SGIP rebates, NEM 3.0, and the state's solar property tax exemption in full detail.
When state tax credits stack with the federal ITC, your effective incentive rate can exceed 40–50% of gross system cost in the most generous states. A New York homeowner installing a $25,000 system could receive $7,500 federal (30%) + $5,000 state (25%, capped) = $12,500 in total tax credits, reducing net cost to $12,500 — a 50% reduction.
Frequently Asked Questions
☀️ 2026 Solar Tax Credit Quick Reference
- Credit rate: 30% of total system cost
- Expires at 30%: December 31, 2032
- IRS Form: Form 5695 (Residential Energy Credits)
- Batteries included: Yes (standalone ≥ 3 kWh since Aug 2022)
- Maximum cap: No cap — 30% of total project cost
- Carryforward: Yes — unused credit carries to future tax years
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