Form 3468 and Form 8582-CR for solar investors: a plain-English walkthrough

By the Tax Field Guide editorial team. Published 2026-10-26. Facts checked 2026-10-26. Related strategies: Solar Investment Credits, Purchased Energy Credits.

Education only; not tax, legal or investment advice. Tax rules change, and how they apply depends on your facts. No outcome is guaranteed.

If you own an interest in a solar project, the credit travels through several IRS forms before it reduces your tax. This guide explains what each form does. It is a map, not filing instructions; use the current IRS instructions and a preparer.

Form 3468: figuring the investment credit

Form 3468 is where an investment credit is figured. The IRS instructions say to complete a separate Form 3468 for each facility or property, starting with Part I (facility or property information).¹ For solar:

Part V covers the clean electricity investment credit under §48E (property placed in service after 2024).
Part VI covers the older energy credit under §48.

Part I and its line items collect the facts that drive the rate: whether the project met the prevailing wage and apprenticeship requirements or an exception (such as under 1 megawatt), when construction began, and whether you are claiming the domestic content or energy community bonus.¹ A domestic content certification statement is attached when that bonus is claimed.²

If you hold the interest through a partnership or S corporation, the entity reports your share on your Schedule K-1, and you use it to complete your own Form 3468.¹

Form 3800: the general business credit

The investment credit is a general business credit. The amount from Form 3468 flows to Form 3800, which applies the overall limits on general business credits.¹

Form 8582-CR: the passive activity limit

If the solar activity is passive for you (you did not materially participate), the credit is a passive activity credit. Form 8582-CR is filed by individuals, estates and trusts with general business credits from passive activities, and it limits the credit to the tax on your net passive income; the rest carries forward.³ See solar credits and the passive activity rules and material participation in solar.

Registration, transfers and recapture

To transfer (sell) a credit, or for eligible entities to take elective payment, the IRS requires a pre-filing registration for each property or facility, which produces a registration number.¹
If the property is disposed of within 5 full years, recapture is figured on Form 4255.⁴ See solar ITC recapture.
Individuals who file electronically must send a paper Form 8453 if attachments are required for Form 3468.¹

Records to keep

Keep the documents that support basis (invoices and any independent appraisal or cost report), placed-in-service evidence, beginning-of-construction evidence, prevailing wage and apprenticeship records if the 30% rate depends on them,⁵ and your hours log if you claim material participation.⁶

Common questions

Which form do I use to claim a solar investment tax credit?

Form 3468 figures the investment credit for each facility; the result flows to Form 3800. If the activity is passive for you, Form 8582-CR limits the credit to the tax on your passive income.

Do I need Form 8582-CR for a solar credit?

You need it if the credit comes from a passive activity, which is generally the case if you did not materially participate in the solar activity.

What happens to a solar credit I cannot use this year?

A passive activity credit that is limited on Form 8582-CR carries forward to later years.

Education only; not tax, legal or investment advice. Talk to a qualified professional before acting.

Sources

IRS, Instructions for Form 3468, https://www.irs.gov/instructions/i3468
IRS, Domestic content bonus credit, https://www.irs.gov/credits-deductions/domestic-content-bonus-credit
IRS, Instructions for Form 8582-CR (12/2025), https://www.irs.gov/instructions/i8582cr
IRS, Instructions for Form 4255, https://www.irs.gov/instructions/i4255
IRS, Prevailing wage and apprenticeship requirements, https://www.irs.gov/credits-deductions/prevailing-wage-and-apprenticeship-requirements
IRS Publication 925, Passive Activity and At-Risk Rules, https://www.irs.gov/publications/p925

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