What is the federal solar tax credit in 2024?

The federal solar ITC is 30% of total installed system cost for 2024 installations under the Inflation Reduction Act of 2022. Valid through December 31, 2032. On a $24,000 system: $7,200 tax credit off your federal income tax bill. Steps down to 26% in 2033, 22% in 2034, then 0% residential in 2035.

Does battery storage qualify for the solar tax credit?

Yes. Since January 1, 2023 under IRA 2022, standalone battery storage systems with 3+ kWh capacity qualify for the full 30% ITC even without solar panels. A Tesla Powerwall at $13,000 generates $3,900 in federal ITC.

💸 Free Federal Solar Tax Credit Calculator — 30% ITC + Carry-Forward + State Stacking

Federal Solar Tax Credit Calculator — 30% ITC (Inflation Reduction Act 2022), Battery Storage Credit, Carry-Forward Schedule When Tax Liability Is Less Than Credit, State Credit Stacking, and Complete Incentive Waterfall

Q: Is the solar tax credit refundable?

No. The solar ITC is not refundable. It can only reduce your federal tax liability to zero. Any unused credit carries forward to future tax years with no statutory limit on residential carry-forward.

The only federal solar tax credit calculator showing the complete ITC picture: the correct 30% rate under the Inflation Reduction Act through 2032, battery storage eligibility (Tesla Powerwall, Enphase, Franklin), year-by-year carry-forward schedule if your tax liability is less than the credit, and stacking with NY, MA, SC, HI, and other state credits for your total net cost.

💸 Federal Solar Tax Credit Calculator

30% Federal ITC — Valid Through December 31, 2032

Step 1 — System & Equipment Costs

Solar panel system cost (gross installed)

Battery storage cost (Powerwall, Enphase, etc.)

Both solar AND standalone battery storage qualify for the 30% ITC under IRA 2022. A Tesla Powerwall at $13,000 installed = $3,900 additional federal tax credit. Enter both costs above for the combined credit.

Step 2 — Federal ITC Rate

Federal ITC percentage

ITC schedule: 30% through 12/31/2032 → 26% in 2033 → 22% in 2034 → 0% residential in 2035. Act before 2033 to capture the full 30%.

Step 3 — State Solar Tax Credit

Select your state credit

Utility rebate or cash incentive ($)

Step 4 — Tax Liability (for Carry-Forward)

Tax liability = your federal income tax AFTER any other credits, but BEFORE the solar ITC. This is Line 18 on Form 1040 minus any other non-refundable credits. It is NOT the amount withheld from your paycheck. If unsure, enter your prior year tax liability from box 1 of your W-2 employer contributions.

Estimated tax liability — Year 1 (installation year)

Tax liability — Year 2

Tax liability — Year 3

The ITC is NOT refundable — it can only reduce your tax to $0. Any unused credit carries forward to the next tax year. There is no limit on how many years you can carry it forward on the residential credit.

📊 Your Solar ITC Breakdown

💸

Enter your system cost, select ITC rate and state credit, add your estimated tax liability — then click Calculate My ITC Credit for the complete incentive waterfall and carry-forward schedule.

Federal Solar Tax Credit Calculator — Understanding the Difference Between a Tax Deduction and a Tax Credit

The federal solar Investment Tax Credit (ITC) is not a deduction. This is the most common and most consequential misunderstanding in residential solar finance. A tax deduction reduces your taxable income — if you’re in the 22% tax bracket and deduct $7,200, you save $1,584. A tax credit reduces your actual tax bill dollar-for-dollar — if you have a $7,200 tax credit, you owe $7,200 less in federal taxes. These are completely different. The ITC is a credit, which is why it’s so powerful: a $24,000 solar system at 30% ITC = $7,200 off your federal tax bill, not 30% off your taxable income.

The second most common misunderstanding: your federal tax liability is not the amount withheld from your paycheck during the year. Withholding is just an estimate. Your actual tax liability — the number that matters for the ITC — is the total federal income tax you owe for the year before any credits are applied. This appears on Line 24 of Form 1040. If your tax liability is $8,000 and your ITC is $7,200, you use $7,200 of the credit in Year 1 and your tax bill drops from $8,000 to $800. If your liability is only $5,000 and your ITC is $7,200, you use $5,000 in Year 1 and carry $2,200 forward to Year 2.

What qualifies for the federal ITC (30%): Solar panels (photovoltaic cells) · Inverters (string, microinverters, optimizers) · Wiring and electrical panels required for the solar system · Mounting hardware and racking · Labor costs for installation · Roof repairs required to install the solar system (proportional) · Battery storage systems connected to solar (e.g., Tesla Powerwall, Enphase IQ Battery, Franklin WH) · Standalone battery storage systems NOT connected to solar (eligible under IRA 2022 starting January 1, 2023). Does NOT qualify: Electric vehicle chargers · Roofing materials beyond what’s directly required for solar mounting · Smart home devices not integral to the solar system · Landscaping changes to reduce shading.

2024 State Solar Tax Credit Reference — Stacking With the Federal 30% ITC

State	State Tax Credit	Cap	On a $24,000 System	Combined Effective Rate
New York	25% of system cost	$5,000 max	$5,000 state (capped) + $7,200 federal = $12,200	49.2% combined savings
Massachusetts	15% of system cost	$1,000 max	$1,000 state (capped) + $7,200 federal = $8,200	34.2% combined
South Carolina	25% of system cost	No cap	$6,000 state + $7,200 federal = $13,200	55% combined
Hawaii	35% of system cost	$5,000 max	$5,000 state (capped) + $7,200 federal = $12,200	50.8% combined
Idaho	40% of system cost	$5,000 max	$5,000 state (capped) + $7,200 federal = $12,200	50.8% combined
Iowa	15% of system cost	No cap	$3,600 state + $7,200 federal = $10,800	45% combined
Arizona	25% of system cost	$1,000 max	$1,000 state (capped) + $7,200 federal = $8,200	34.2% combined
Maryland	$1,000 flat grant	—	$1,000 state + $7,200 federal = $8,200	$8,200 total savings

Three Real ITC Calculation Examples — Including Carry-Forward Scenarios

💸

Example 1: Stamford, CT — $28,000 Solar + $13,000 Battery, $9,000 Tax Liability

Stamford, Connecticut — solar + Powerwall, no CT state credit, $9,000 annual tax liability

A Stamford homeowner installs a $28,000 solar system and a $13,000 Tesla Powerwall. Connecticut has no residential solar tax credit. Her annual federal tax liability is approximately $9,000 (based on household income of ~$130,000 married filing jointly after standard deduction).

Component	Cost	ITC (30%)
Solar panel system	$28,000	$8,400
Tesla Powerwall (IRA 2022 eligible)	$13,000	$3,900
Total eligible cost	$41,000	$12,300 ITC
Year 1 tax liability	$9,000	Use $9,000 in Year 1
Carry-forward to Year 2	$3,300 remaining	Use $3,300 in Year 2
Net cost after ITC	$28,700	30% off $41,000

✅ Connecticut note: CT has no state income tax credit for solar, but the Connecticut Green Bank offers low-interest solar loans through the Smart-E Loan program, and Connecticut utilities offer net metering at retail rate. Eversource and UI (United Illuminating) both have interconnection procedures for residential solar. Connecticut DEEP at portal.ct.gov/DEEP provides the latest CT solar incentive information. ITC carry-forward information: IRS Publication 946 and Form 5695 instructions at irs.gov.

🗽

Example 2: Albany, NY — $21,000 Solar, NY 25% State Credit Stacked with Federal 30%

Albany, New York — residential solar, NY-Sun incentive state, 25% NY state credit + 30% federal ITC

An Albany homeowner installs a $21,000 solar system. New York offers a 25% state income tax credit (capped at $5,000) in addition to the federal 30% ITC. Tax liability: $12,000/year — enough to use the full ITC in Year 1.

Incentive	Rate	Amount
Gross system cost	—	$21,000
Federal ITC (30%)	30%	−$6,300
NY State Solar Tax Credit (25%)	25% (max $5,000)	−$5,000 (capped)
NY-Sun Incentive (estimate)	varies by utility	−$1,050 est. (NYSERDA)
Net cost	—	$8,650
Effective discount	—	58.8% off gross cost

✅ New York note: The NY state solar credit is claimed on Form IT-255 (Claim for Solar Energy System Equipment Credit). The credit applies to the cost of the solar equipment only, not installation labor for the state credit — unlike the federal ITC which includes labor. NY-Sun incentives through NYSERDA vary by utility territory and program availability. NYSERDA at nyserda.ny.gov/solar has current NY-Sun incentive levels. The NY state credit can also carry forward for up to 5 years if not fully used in the installation year — consult a NY tax professional for details.

🌴

Example 3: Charleston, SC — $19,500 Solar, SC 25% State Credit, Retiree Tax Situation

Charleston, South Carolina — retiree household, solar on fixed income, SC 25% state credit, low tax liability carry-forward

A retired Charleston couple installs a $19,500 solar system. South Carolina offers a 25% state tax credit with no cap. Their federal tax liability on Social Security + pension income is only $3,000/year — requiring a multi-year carry-forward of both federal and SC state credits.

Tax Year	Federal Tax Liability	Federal ITC Used	Federal Carry-Fwd
Year 1	$3,000	$3,000	$2,850 remaining
Year 2	$3,000	$2,850	$0 — done!
SC State ITC (25% = $4,875)	SC allows multi-year carry-forward for 10 years at ~$1,500–2,000/year based on SC income tax
Net cost after full ITC use	$19,500 − $5,850 federal − $4,875 SC = $8,775 net

✅ South Carolina note: The SC solar energy tax credit is 25% of the cost of equipment and installation (no cap), claimed on SC Schedule TC-38. Like the federal ITC, the SC credit is non-refundable but carries forward for up to 10 years. For retirees on fixed income with low tax liability, the carry-forward capability is crucial — the full value of both federal and state credits is eventually realized, it just takes multiple years. SC Energy Office at energy.sc.gov administers SC’s solar incentive information. DSIRE at dsireusa.org has current SC credit details.

Three Expert Tips for Maximizing Your Federal Solar Tax Credit

Add Battery Storage Now to Combine the ITC — Standalone Batteries Qualify Under IRA 2022

Before the Inflation Reduction Act of 2022, home battery storage systems only qualified for the federal ITC if they were charged exclusively by solar panels. Under IRA 2022, effective January 1, 2023, standalone battery storage systems with at least 3 kWh of capacity qualify for the full 30% ITC regardless of whether they’re connected to solar. This is a historic change: a Tesla Powerwall at $13,000 installed now generates $3,900 in federal tax credits on its own. If you’re adding batteries at the same time as solar, list both costs separately above to calculate your combined ITC credit. If you already have solar and are adding batteries later, you can file Form 5695 in the year the batteries are installed to claim the standalone battery ITC.

Understand What “Tax Liability” Really Means — It’s Not What’s Withheld from Your Paycheck

Your federal tax liability — the critical number for ITC carry-forward — is the total federal income tax you owe for the year, calculated from your taxable income. It appears on Line 24 of Form 1040. This number is usually different from your tax withholding (what your employer automatically deducts from each paycheck). If your withholding is $9,000 and your actual tax liability is $7,000, your refund is $2,000 — and your ITC eligibility is based on the $7,000 liability, not the $9,000 withholding. For most W-2 employees, annual tax liability tracks with income. Self-employed filers calculating quarterly estimated taxes often have a clearer picture. To estimate: look at your prior year Form 1040, Line 24. Consult a CPA to verify your liability in the solar installation year before finalizing your system size assumptions.

File Form 5695 Yourself — It’s One Page and Your Installer Can’t Do It For You

IRS Form 5695 (Residential Energy Credits) is the form you must file to claim the solar ITC. It’s a single-page form — literally one of the simplest federal tax forms — but your solar installer cannot file it for you. It must be included with your personal federal income tax return (Form 1040) for the year the system is installed and operational. Part I is for residential clean energy credits (solar + batteries). Most major tax software (TurboTax, H&R Block, TaxSlayer) has a dedicated workflow for Form 5695 that guides you through the inputs. If you use a CPA, bring them your signed solar installation contract and the final system cost invoice. Keep these documents for at least 3 years after filing. Download Form 5695 and instructions directly from IRS at irs.gov.

Frequently Asked Questions About the Federal Solar Tax Credit

What is the federal solar tax credit and how does it work?+

The federal solar Investment Tax Credit (ITC) is a dollar-for-dollar reduction in your federal income taxes equal to 30% of your total solar installation cost through December 31, 2032 (under the Inflation Reduction Act). If you install a $24,000 solar system, you receive a $7,200 tax credit — meaning you owe $7,200 less in federal income tax for the year you install the system. It is not a rebate or refund — you must have federal tax liability to use it, and any unused credit carries forward. Claim it on IRS Form 5695 with your annual tax return.

How much is the solar tax credit in 2024 and 2025?+

The federal solar ITC is 30% of total eligible installation cost for systems installed in 2024 and 2025. The 30% rate was extended through December 31, 2032 by the Inflation Reduction Act of 2022. On a $24,000 system: $7,200 credit. On a $30,000 system: $9,000 credit. It steps down to 26% for systems installed in 2033, 22% for 2034, and goes to 0% for residential systems installed in 2035 and beyond. Commercial and utility systems retain 10% after 2034 if domestic content and labor requirements are met.

Is the solar tax credit refundable?+

No. The federal solar ITC is NOT refundable. This means it can only reduce your federal tax liability to zero — it cannot generate a refund check if the credit exceeds your tax liability. If your ITC credit is $7,200 and your tax liability is $5,000, you use $5,000 in Year 1, pay $0 in taxes, and the remaining $2,200 carries forward to the next tax year. You never “lose” the credit — it simply carries forward until fully used. There is currently no expiration limit on residential carry-forward, though it’s best to verify this with a tax professional as tax law can change.

Does battery storage qualify for the 30% solar tax credit?+

Yes — since January 1, 2023, standalone battery storage systems with a capacity of at least 3 kWh qualify for the 30% federal ITC under IRA 2022. Before IRA 2022, batteries only qualified if charged exclusively from solar. Now a Tesla Powerwall ($13,000 installed) qualifies for $3,900 in federal ITC even without solar panels attached. Common qualifying battery systems: Tesla Powerwall (13.5 kWh, qualifies), Enphase IQ Battery 10T (qualifies), Franklin WH (qualifies). Batteries must be installed at your primary or secondary US residence and have a minimum 3 kWh capacity to qualify.

Do I have to own my solar panels to get the ITC?+

Yes. You must own the solar system to claim the ITC. If you sign a solar lease or PPA (Power Purchase Agreement), the leasing company owns the system and claims the ITC — not you. Only the system owner can claim the ITC. Cash purchases and solar loans both make you the system owner (and ITC-eligible). Roof ownership is not required — you can rent or lease the roof space and still own the solar equipment, as long as the system is installed on your US primary or secondary residence. Community solar subscriptions (where you buy power credits rather than panels) generally do not qualify for the residential ITC; check with a tax advisor.

What costs are included in the solar tax credit calculation?+

Qualifying ITC costs: Solar panels and modules · String inverters, microinverters, power optimizers · Wiring, conduit, and electrical panels required for the solar system · Mounting hardware, racking, and structural components · Labor for installation (including electrician labor) · Permit and inspection fees · Roof repairs directly required by the solar installation (proportional) · Battery storage (3+ kWh capacity, owned, on residence) · Solar monitoring equipment integral to the system. Not qualifying: EV charger installation · Roofing materials beyond structural requirements for solar · Smart home devices not integral to solar · Landscaping or tree removal for shading. Your solar installer’s contract should itemize qualifying vs. non-qualifying costs.

How long can I carry forward the solar ITC?+

The residential solar ITC (Form 5695 Part I) technically has no statutory limit on carry-forward years — unused credits carry forward annually until fully used. For commercial solar (Form 3468), the carry-forward is limited to 22 years. In practice, most US homeowners use the full ITC within 1-3 years. The ITC can only be used against income tax liability, not self-employment tax or AMT (though as of IRA 2022, the ITC is NOT limited by the tentative minimum tax for personal use property, which is beneficial for high-income homeowners). Consult IRS Publication 946 or a CPA for your specific situation.

Can I claim the solar ITC on a rental property?+

The residential ITC (30% under IRA 2022) is available for solar installed on your primary residence or second home (vacation home used personally). Rental properties do NOT qualify for the residential ITC. However, solar systems on rental properties or commercial buildings may qualify for the business energy Investment Tax Credit (also 30% under IRA 2022, potentially higher with domestic content and labor bonuses), which is claimed on IRS Form 3468 rather than Form 5695. Commercial ITC has different carry-forward rules and interacts with depreciation. Consult a CPA familiar with energy tax credits for investment property scenarios.

What is the difference between the federal ITC and state solar tax credits?+

Federal ITC (30%): Applied on federal Form 1040, reduces federal income tax. Available in all 50 states. Based on total system cost including labor. State solar credits: Applied on state income tax return, reduce state income tax. Vary significantly by state — NY 25% (max $5k), MA 15% (max $1k), SC 25% (no cap), HI 35% (max $5k). State credits typically apply only to equipment cost (not installation labor) in most states. Federal and state credits are completely separate and independently stackable — claiming NY’s 25% does not reduce your federal 30% and vice versa. See all current state incentives at DSIRE: dsireusa.org.

How do I claim the solar ITC on my tax return?+

File IRS Form 5695 (Residential Energy Credits) with your Form 1040 for the tax year the solar system is installed and placed in service (operational, connected to grid, producing electricity). On Form 5695 Part I: enter your solar costs in Line 1, Line 6 computes the credit (30%), and the credit flows to Schedule 3 Line 5 and then to Form 1040 Line 20. Most tax software handles this automatically when you enter your solar system details. Keep documentation: your signed solar contract, final invoice, and permission-to-operate letter from your utility. The IRS may request proof of the installation date and cost if audited. Download Form 5695 at irs.gov/forms-pubs/about-form-5695.

Related Solar Calculators

Legal Disclaimer and Editorial Transparency

This calculator provides estimates for informational and planning purposes only. This is not tax advice. The federal solar Investment Tax Credit involves complex tax law — consult a qualified tax professional (CPA, tax attorney, or enrolled agent) before making financial decisions based on ITC projections. ITC rules are established by the IRS under IRC Section 48E (residential) and the Inflation Reduction Act of 2022; consult IRS Form 5695 and its instructions at irs.gov. State solar tax credit information is based on DSIRE database (as of 2024) at dsireusa.org — verify current rates and caps with your state tax authority before filing. USCalculators.com is not a tax service and is not affiliated with the IRS, any state tax authority, or any solar installer or financial institution.