Suncipher

Federal Tax Credit Calculator

Covers both federal credits — the uncapped 30% clean energy credit and the annually capped efficiency improvement credit — since they work differently enough to trip people up.

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Both federal credits below expired for 2026. The One Big Beautiful Bill Act (signed July 4, 2025) ended the Residential Clean Energy Credit and the Energy Efficient Home Improvement Credit for anything placed in service after December 31, 2025 — confirmed on the IRS's own FAQ page for the change. This tool is useful if you're checking what you could have claimed on a 2025 installation for your 2025 tax return — it does not apply to a 2026 purchase. For 2026 projects, check state tax credits and utility rebates instead, which are unaffected by this change.

This tool provides a planning estimate based on the assumptions shown below the results — it is not a quote, and actual costs and savings will vary by installer, local rates, and your specific home.
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Total tax owed for the year — not your refund or withholding. This determines whether any credit carries forward.

Enter your project details to see your estimated credit.

How this calculator works

Both federal credits apply a 30% rate to qualifying costs, but differ structurally: the Residential Clean Energy Credit (solar/battery) has no dollar cap but is nonrefundable — unused credit carries forward to future tax years. The Energy Efficient Home Improvement Credit (heat pumps, insulation, windows) has annual per-category dollar caps and generally does not carry forward.

Source: IRS Residential Clean Energy Credit; IRS Energy Efficient Home Improvement Credit, last checked 2026-07-10. Both credits expired for property placed in service after 2025-12-31. This tool provides an estimate for eligible 2025 installations, not tax advice.