By the SolarPayback Editorial Team · Updated June 2026 · Researched from authoritative sources. General information, not professional advice.
For most homeowners, the single largest discount on a solar installation comes from the federal government. The Residential Clean Energy Credit, administered by the Internal Revenue Service (IRS), can cut the cost of a qualifying home solar system by a substantial percentage of what you spend. Understanding how it works — and, just as importantly, its limits — is essential before you sign any contract.
The Residential Clean Energy Credit is a federal income-tax credit equal to a percentage of your qualified solar and clean-energy expenses. It was significantly expanded and extended by the Inflation Reduction Act, which set the credit at 30% of qualified costs with no dollar cap. A "credit" is far more valuable than a deduction: it reduces your tax bill dollar for dollar, not just your taxable income.
Important — verify the current rules. Tax law is not static. Subsequent legislation has changed the timeline for clean-energy incentives, and percentages and expiration dates are subject to change. Do not assume the 30% rate or any particular end date will apply to your situation. Before you budget around this credit, check the current figures on the IRS Residential Clean Energy Credit page at IRS.gov and confirm them with a tax professional. We deliberately do not state a fixed future expiration year here, because that is exactly the kind of detail current law can alter.
Suppose the rules in effect for your tax year provide a 30% credit. Here is how a typical residential system breaks down. (These numbers are illustrative — your actual cost, credit, and net price will differ.)
| Item | Amount |
|---|---|
| Gross system cost (panels, inverter, mounting, labor) | $24,000 |
| Credit percentage (verify current rate) | 30% |
| Federal tax credit | $7,200 |
| Net cost after credit | $16,800 |
Because the credit is a percentage with no cap, larger systems generate larger credits. The table below shows the credit amount at a 30% rate across several common price points.
| Gross system cost | Credit at 30% | Net cost |
|---|---|---|
| $15,000 | $4,500 | $10,500 |
| $20,000 | $6,000 | $14,000 |
| $30,000 | $9,000 | $21,000 |
| $40,000 | $12,000 | $28,000 |
This is the most misunderstood feature of the credit. It is nonrefundable, which means it can only offset federal income tax you actually owe. If your credit is $7,200 but your federal tax liability for the year is only $4,000, you cannot receive the remaining $3,200 as a refund check. The good news: under current rules, unused credit generally carries forward to future tax years until it is used up. Whether you can fully benefit depends on your own tax situation, which is one more reason to talk to a CPA before assuming you will capture the entire amount.
Qualified expenditures generally include the equipment and the work needed to install it. Typically that covers:
The U.S. Department of Energy publishes consumer guidance on the credit that mirrors IRS rules and can help you understand which line items on a quote are likely to count.
Eligibility hinges on ownership and residence:
You claim the Residential Clean Energy Credit by filing IRS Form 5695, Residential Energy Credits, and attaching it to your Form 1040 for the tax year in which the installation was completed (placed in service). Keep your itemized invoices, proof of payment, and the manufacturer documentation in your records. Many tax-software packages walk you through Form 5695 automatically, but a tax professional can ensure the credit, any carryforward, and any interactions with other credits are handled correctly.
The federal credit rarely stands alone. Its relationship with state and local programs matters:
Because the credit can swing the net cost of a system by thousands of dollars, treat it as a major variable in your payback math — but a variable whose exact value you confirm against current IRS guidance, not memory or a salesperson's pitch.
No. With a lease or a power-purchase agreement, the third-party owner of the equipment claims the credit, not you. To claim it yourself, you must own the system through a cash purchase or a loan.
The credit is nonrefundable, so it cannot create a refund beyond your liability. Under current rules, the unused portion generally carries forward to offset taxes in future years. Ask a CPA how this applies to you.
File IRS Form 5695, Residential Energy Credits, and attach it to your Form 1040 for the tax year the system was placed in service. Keep your invoices and payment records in case of questions.
Do not assume so. The Inflation Reduction Act set the rate at 30%, but tax law changes and the timeline for clean-energy incentives has been affected by later legislation. Always verify the current percentage and expiration on IRS.gov and with a tax professional.
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