Solar Tax Credit Calculator: 2026 Rules and Prior Years

For new homeowner solar property placed in service after December 31, 2025, the IRS says the Section 25D credit is unavailable. The current-year check starts at zero; the optional historical estimate covers eligible solar installations in 2022–2025.

Starting values are examples. No contact details are required.

Your scenario

Replace the example inputs and press Calculate Results. Results will appear here.

What the historical estimate means

For eligible solar installed in 2022–2025, the illustration is 30% of the eligible basis entered. A known capacity limits current-year use; blank remains unknown. The credit is nonrefundable. Potential unused amounts require separate carryforward review.

This tool does not prepare a return, establish eligibility, calculate older credits, or model existing carryforwards. Check current IRS guidance and Form 5695 instructions for your tax year.