You can install solar panels yourself and claim the federal tax credit only if your system was fully installed and generating power by December 31, 2025. The One Big, Beautiful Bill, signed July 4, 2025, terminated the Residential Clean Energy Credit for any expenditure made after that date, and there is no separate rule preserving it for do-it-yourself installers.1Internal Revenue Service. FAQs for Modification of Sections 25C, 25D, 25E, 30C, 30D, 45L, 45W, and 179D Under Public Law 119-21 If you finished the job in time, or you have unused credit from an earlier year, you can still benefit. Everything below explains what qualifies, what doesn’t, and how to file.
The December 31, 2025 Cutoff
The 30% credit under 26 U.S.C. ยง 25D was originally scheduled to run through 2034 with a step-down. That timeline is gone. The credit does not apply to any expenditure made after December 31, 2025, and the repeal treats DIY and professionally installed systems identically.2Office of the Law Revision Counsel. 26 USC 25D – Residential Clean Energy Credit
The date that matters is not when you paid. The statute treats an expenditure as made when “the original installation of the item is completed.”2Office of the Law Revision Counsel. 26 USC 25D – Residential Clean Energy Credit Buying $20,000 of panels in October 2025 and finishing the wiring in January 2026 puts the whole expenditure in 2026, with no credit. The IRS has confirmed that prepayment does not create a workaround.1Internal Revenue Service. FAQs for Modification of Sections 25C, 25D, 25E, 30C, 30D, 45L, 45W, and 179D Under Public Law 119-21 For new construction, the expenditure counts only when your original use of the structure begins.
What a DIY Installer Can Claim for a 2025 Completion
If your system was operational on or before December 31, 2025, you claim 30% of qualified costs on your 2025 return.3Internal Revenue Service. Residential Clean Energy Credit Qualified costs include solar photovoltaic panels, inverters, mounting hardware, wiring, and battery storage of at least 3 kilowatt-hours.2Office of the Law Revision Counsel. 26 USC 25D – Residential Clean Energy Credit
Your own labor has no tax value. Professional installation labor qualified when paid, but a homeowner who spends a weekend on the roof cannot assign a dollar amount to that time and add it to the calculation. Only tangible equipment and materials count toward the 30%.
Rebates and subsidies affect the math. Utility subsidies that reduced your purchase price must be subtracted from qualified expenses before applying the 30%. Net metering payments for electricity you sell back to the grid do not reduce your eligible costs. State rebates are subtracted only when they are based on the property’s cost and come from someone connected to the sale, such as a manufacturer or distributor.3Internal Revenue Service. Residential Clean Energy Credit
The system must have been placed in service during the tax year you claim, meaning wired, connected, and generating electricity. For a DIY installer, that usually means inverter activation, utility permission to operate, or a local inspection sign-off before the calendar rolled over.
How To File on Form 5695
Report the credit on IRS Form 5695, Residential Energy Credits.4Internal Revenue Service. About Form 5695, Residential Energy Credits Solar costs go on Line 1 of Part I. Enter the total you paid for panels, inverters, racking, wiring, and qualifying battery storage, minus any utility subsidies or qualifying rebates. Leave your own labor out.
The form multiplies that total by 30%. A $15,000 equipment purchase produces a $4,500 preliminary credit. Other qualifying clean energy property, such as a geothermal heat pump, goes on separate lines in the same Part I section, and Form 5695 combines everything into a single credit figure.5Internal Revenue Service. Form 5695 (2025) Residential Energy Credits
The final amount moves to Schedule 3 of Form 1040, Line 5a, where it reduces your federal income tax.6Internal Revenue Service. Schedule 3 (Form 1040) 2025 Tax software links the forms automatically. On paper, attach Form 5695 to your return.
Unused Credit Carries Forward
The credit is non-refundable. It can zero out your federal tax bill, but it will not generate a refund on its own. Anything left over rolls into the next year, and that carry-forward provision survived the repeal.2Office of the Law Revision Counsel. 26 USC 25D – Residential Clean Energy Credit If a 2025 installation produces a $6,000 credit but you only owe $4,000 in federal tax that year, the remaining $2,000 goes on your 2026 return.
Carry-forward amounts from earlier years didn’t disappear with the repeal either. The termination cuts off new expenditures, not previously earned credit sitting in the pipeline. File Form 5695 to claim it.
Documentation To Keep
The installation completion date is the new pressure point. If the IRS asks whether your system was finished before January 1, 2026, hold on to:
- Itemized receipts for every piece of hardware, showing purchase date and vendor.
- Manufacturer certification statements confirming the equipment meets applicable standards.
- Proof that the system was generating power in time: inverter activation records, a local inspection certificate, or a utility permission-to-operate letter dated on or before December 31, 2025.
- Records of any utility buy-down, state rebate, or manufacturer incentive that reduced your out-of-pocket cost.
An inverter’s first power-generation timestamp or a signed inspection report carries more weight than a receipt showing when you bought the panels.
What’s Left for DIY Solar in 2026
The federal 30% is gone for anything installed in 2026 or later, and no reduced-percentage version replaced it. That’s the boundary: the Residential Clean Energy Credit no longer offsets DIY solar costs going forward, whether you install yourself or hire a contractor.
State and local programs operate independently of the federal credit. Several states offer their own tax credits, rebates, or performance-based incentives, and net metering, where available, continues to credit you for excess electricity sent to the grid. Check with your state energy office or utility for current offerings.
If Congress restores a residential clean energy credit later, systems installed during the gap would not retroactively qualify unless the new law says so. For a 2026 DIY installation, the decision now rests on equipment cost, long-term electricity savings, and whatever state or utility incentives are on the table, not on the federal tax code.