See whether your tax years are worth a clean energy credit review

The short answer

These terms describe how federal clean energy tax credits work in general — not whether any of them apply to you. Each definition is deliberately generic and conditional: it explains the mechanics, then routes the specifics to your own CPA or tax attorney, because whether a term reaches your situation depends on facts a glossary cannot see. This page is educational and is not tax or legal advice.

Use these definitions to follow a conversation and ask better questions, not to reach conclusions. Throughout, “can” and “may” never mean “you do” — your advisor confirms anything before you rely on it.

Your intake is read by a person, not a bot. We screen for fit only. Any clean energy credit structure is confirmed against source materials and your own CPA or tax attorney before you rely on it.

Key terms

The vocabulary, in plain language.

Transferability (IRC §6418): A regime that lets an eligible taxpayer who earns certain clean energy credits sell all or part of them, for cash, to an unrelated buyer. Whether any particular credit can be transferred or used by a buyer turns on the facts and your own CPA or tax attorney's review.
Elective pay / direct pay (IRC §6417): An election under which certain entities can be treated as having made a payment against their federal tax equal to the amount of an applicable credit, in effect monetizing it without owing that much tax. Who may elect, and for which credits, is fact-specific and a question for your own CPA or tax attorney.
“Applicable credit” (IRC §6417(b)): A defined statutory list of specified clean energy credits that the elective-pay rules can apply to; a credit is only relevant here if it appears on that list. Whether a given credit is an applicable credit in your situation is a determination for your own CPA or tax attorney.
General business credit (IRC §38): The umbrella credit that aggregates many separate business credits — including most clean energy credits — and subjects them to an overall limitation against tax for the year. How that limitation applies to a particular return is fact-specific and belongs with your own CPA or tax attorney.
Form 3800: The IRS form on which the component business credits are combined into the general business credit and any carryback or carryforward is tracked. How a specific credit is reported and limited on a given return is a question for your own CPA or tax attorney.
Passive activity limitation (IRC §469): A rule — in a section the statute titles “Passive activity losses and credits limited” — under which credits from an activity a taxpayer does not materially participate in are generally allowed only against tax on passive income, with the rest carried forward. Whether it applies to you is a facts-and-circumstances call for your own CPA or tax attorney.
Material participation: The standard, tested against the facts, for whether a taxpayer is involved in an activity on a regular, continuous, and substantial basis — which can affect whether the passive activity limitation applies to a credit. Whether your participation meets the standard is a determination for your own CPA or tax attorney.
Recapture (IRC §50): A rule under which, if investment credit property is disposed of or stops being qualifying property within a recapture period, part of the credit may have to be paid back. Whether and how recapture could affect a specific credit is a question for your own CPA or tax attorney.
At-risk rules: Rules applied to credits through IRC §49, drawing on the at-risk concept in IRC §465, that can reduce the credit base by amounts a taxpayer is not genuinely economically exposed on — broadly, certain nonrecourse financing. How they apply to a particular investment is fact-specific and a matter for your own CPA or tax attorney.
Basis: Generally, a taxpayer's measured investment in property; clean energy credits are typically computed against qualifying basis, and a credit claimed generally requires a corresponding basis reduction under IRC §50(c). Determining basis on specific facts is the work of your own CPA or tax attorney.
Carryback / carryforward (IRC §39): Rules that let an unused general business credit be applied to certain other tax years rather than lost — generally a one-year carryback (longer for some credits; the clean energy “applicable credits” have a three-year carryback) and a forward period of a set number of years. How any carryback or carryforward works for a specific credit is a question for your own CPA or tax attorney.
Placed in service: The point at which property is in a condition or state of readiness for its intended use, which generally fixes the year a credit may be earned. Whether and when property was placed in service on specific facts is a determination for your own CPA or tax attorney.
Prevailing wage & apprenticeship: Labor conditions under the Inflation Reduction Act — paying applicable prevailing wage rates and using registered apprentices for a required share of work, with recordkeeping — that, when met, can increase the base amount of certain credits. Whether the conditions were met, and the effect on a credit, is established by the records and your own CPA or tax attorney's review.
Domestic content: A separate Inflation Reduction Act condition under which sourcing a required portion of steel, iron, and manufactured products from the United States can support an increased credit when the requirements are met and documented. Whether it applies to a specific project is a question for your own CPA or tax attorney.

Common questions

Questions about using this glossary.

Is this glossary tax or legal advice?

No. These are plain, generic definitions of how the terms are used in the federal clean energy credit area. The page is educational and does not provide tax, legal, accounting, financial, or investment advice, and it does not assert that you qualify for, are eligible for, or can use any credit. Apply any term to your situation only with your own CPA or tax attorney.

Why do the definitions keep pointing back to my advisor?

Because nearly every term here resolves on the specific facts of a return — basis, participation, financing, placed-in-service timing, and documentation all change the answer. A general definition can describe the mechanics, but whether and how a term applies to you is a determination your own CPA or tax attorney makes, not something a glossary can decide.

Does knowing these terms mean a credit is available to me?

No. Understanding the vocabulary helps you ask sharper questions, but it does not establish that any credit reaches you, can be used by you, or is worth any amount. Those are fact-specific conclusions for your own CPA or tax attorney after a review of your actual situation.

Where can I read the underlying rules myself?

The references below link to the official IRS pages and the statute text on Cornell's Legal Information Institute for the terms defined here. They describe the mechanics in primary sources; they are not a substitute for advice on your own return from a qualified advisor.

References

Read the primary sources.

These are official sources for the mechanics defined above. They are not a substitute for advice on your own return.

Last reviewed: June 2026

Clean energy tax credit terms, defined plainly.