Key takeaway
For these credits, installation timing matters as much as purchase timing, and Form 5695 is the filing checkpoint that ties it together.
Why this matters in 2026
The IRS says the Residential Clean Energy Credit equals 30% of the cost of new, qualified clean energy property installed from 2022 through December 31, 2025. It also says the credit is not available for property placed in service after December 31, 2025.
That means a homeowner filing in 2026 may still care a lot about the credit if the work was installed in 2025.
The timing rule people miss
The IRS says you must claim the credit for the tax year when the property is installed, not merely when it was purchased.
That is a critical distinction. Ordering equipment in one year and completing installation in another can change which tax return matters.
What kinds of property the IRS lists
The IRS says qualified expenses can include new:
- solar electric panels
- solar water heaters
- wind turbines
- geothermal heat pumps
- fuel cells
- battery storage technology
It also says used clean energy property is not eligible.
How to claim it
The IRS says you claim the credit by filing Form 5695 with your tax return. The 2025 instructions for Form 5695 also say the form is used to take the residential clean energy credit and that any unused portion can be carried forward to 2026.
That matters for two reasons:
- the credit is nonrefundable, so it cannot exceed the tax you owe
- unused credit can still matter later if you cannot use all of it at once
A worked example of the credit
Say you installed $20,000 of qualifying solar equipment in 2025. At 30%, the credit is $6,000. If your tax liability for the year is at least $6,000, the credit wipes out that much of what you owe. If your liability is only $4,000, the remaining $2,000 is not lost — the instructions allow carrying the unused amount forward to 2026, when future tax can absorb it.
Why the carryforward matters
Because the credit is nonrefundable, a low-tax year does not destroy its value. The carryforward turns a one-year limit into a multi-year benefit, which is especially useful for retirees or anyone with unusually low income in the install year. The trade-off is record-keeping: you must show the original install date and cost to claim the carryforward later.
Records to keep
Hold on to:
- the dated invoice showing installation in 2025
- proof of payment
- manufacturer statements that the equipment qualifies
- your filed Form 5695 and the supporting worksheets
These matter more than the headline percentage, because the credit is only as real as your ability to prove it.
What if installation slipped to 2026
If the property was not placed in service until 2026, the federal residential clean energy credit is generally unavailable for it under current rules. That makes the install date the line that decides everything. If a project is close to the boundary, finishing installation in 2025 can be worth far more than the equipment discount you might chase by waiting.
A filing checklist
If you completed qualifying work in 2025 and are filing in 2026, check:
- whether the property was actually installed in 2025
- whether the property type is listed as eligible
- whether you have the records for cost and installation
- whether Form 5695 is included with the return
This is one of those tax items where timing and records matter as much as the headline percentage.
Why the credit sometimes does not apply
A few situations quietly disqualify otherwise hopeful claims. The property generally must be installed at a home you use as a residence, so pure rental or investment property usually does not qualify the same way. Equipment that is used rather than new typically fails the eligibility test. And if the installation is not completed and placed in service during 2025, the federal credit for that property is generally gone under current rules. The lesson is not to assume a purchase counts; confirm the property type, the new-versus-used status, and the install date before relying on the savings in your plan.
Coordinating with other incentives
The federal credit is separate from any state or utility rebate, and the two can sometimes stack, but the mechanics vary by location and program. A state rebate may reduce your net cost without affecting the federal percentage, which is calculated on the qualified expense. Because programs change and overlap differently by state, the practical step is to check both layers for the same project rather than assume one replaces the other.
Keep the installer's certification
For the credit to hold up, the equipment generally must meet specific efficiency standards, and the installer should provide documentation showing that. Keep that certification, the dated invoice, and your filed Form 5695 together. If the IRS questions the claim later, the certification is the evidence that turns a disputed credit into a documented one. The percentage is only as solid as the paper behind it.
Official references
Related next steps
If a major home project changed your cash flow, test the monthly strain with the Budget Calculator and compare the broader housing impact with the Mortgage Calculator.