How Section 6418 Tax Credit Transfers Work
Section 6418 is a four-year-old statute, and most CPAs have heard of it without having worked a transaction through it yet. This page walks through the actual mechanism — what Congress wrote into law, what's settled, and what's still being argued out in practice.
The Statutory Basis
Section 6418 was added to the Internal Revenue Code by Section 13801 of the Inflation Reduction Act of 2022 (P.L. 117-169). It allows an eligible taxpayer who generates certain federal tax credits — including the Section 45Q carbon oxide sequestration credit — to transfer all or part of that credit to an unrelated transferee in exchange for cash.
Before this provision existed, a taxpayer generating a credit larger than its own tax liability had few good options for monetizing the excess. Section 6418 created a direct sale mechanism: cash changes hands, the credit moves with it, and the buyer steps into the seller's shoes for purposes of claiming that credit on its own return.
This is a different mechanism from a tax equity partnership or a sale-leaseback structure. There's no allocation, no partnership return, and — critically — no Schedule K-1. The statute treats it as a straight transfer of a tax attribute.
Step by Step: How the Transfer Actually Works
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The credit is generated.
A project owner operates a facility or activity that qualifies under Section 45Q — capturing carbon oxide and either storing it permanently or putting it to a qualifying use. The owner must be the proper claimant: generally, the party that owns the carbon capture equipment and ensures the capture and disposal or utilization actually occurs.
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The credit is registered with the IRS.
Before any transfer can happen, the generating taxpayer must obtain a pre-filing registration number through the IRS Energy Credits Online portal. This step exists specifically to prevent the same credit from being sold more than once and to give the IRS visibility into the transaction before it's reported. No registration number means no valid transfer — this is the single most important document for a buyer's CPA to verify independently, not take on a seller's word.
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The credit is sold for cash.
The registered owner transfers the credit to an unrelated buyer in exchange for cash consideration. Section 6418 requires that the consideration be cash — not property, not services, not a forward commitment tied to project performance. The cleaner and more fixed the consideration, the more clearly the transaction looks like a transfer rather than something the IRS could attempt to recharacterize as a partnership allocation or financing arrangement.
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The buyer reports the credit.
The buyer reports the transferred credit on its own federal income tax return, generally on Form 3800 (General Business Credit), including the registration number obtained in Step 2. The buyer did not generate the credit and has no ownership in the underlying project — but for purposes of claiming the credit, the buyer is treated as the taxpayer.
What's Settled Law, and What Isn't
This is the section most sales material skips, and it's the section your client's CPA will ask about first.
Settled:
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Section 469 passive activity treatment is resolved, not open — and it depends on buyer type. Final Treasury regulations issued in April 2024 (T.D. 9993) confirmed that §469 applies to transferee taxpayers, with no general carve-out for credit transfers. But §469 itself only reaches individuals, estates, trusts, closely held C corporations, and personal service corporations — it does not apply to widely held C corporations at all.
For a widely held C-corporation (one not majority-owned by five or fewer individuals), this is straightforwardly favorable: passive activity limitations simply don't apply, and the credit can offset the corporation's general federal income tax liability without any material participation requirement. This makes widely held corporations the most straightforward buyer type in this market.
For an individual, a closely held C-corporation, or a personal service corporation, the limitation does apply. A transferred credit is generally treated as a passive activity credit, usable only to offset the buyer's passive income — not ordinary W-2 income, active business income, or most capital gains — unless a narrow material-participation exception applies. In practice, the individual buyer opportunity is concentrated among taxpayers with substantial passive income streams, not among W-2 earners looking for a general tax reduction.
- §6418 itself is enacted law, not a proposed rule or a planning strategy. The transfer mechanism exists and has been used in real transactions since 2023.
- The credit is reported as a general business credit under §38 once transferred — this is how the statute is structured, not a matter of interpretation.
- No equity, no K-1, no partnership return — the buyer's reporting is a single line item referencing the registration number, not a complex multi-schedule filing.
Genuinely unsettled, and worth your CPA's direct attention:
- Treatment as a 'specified credit' under §38(c)(4)(B), which affects whether the credit can offset tentative minimum tax. This is an open question rather than settled guidance. Treat any claim that this has been 'confirmed' or 'approved' by the IRS with real skepticism — ask specifically what document is being pointed to, and have your own counsel read it before relying on it.
- Storage method classification. Section 45Q draws real distinctions between geological storage, utilization, and other disposal pathways, and the credit amount and qualification strength can depend on which category a project's documentation actually supports. A project described in marketing materials as achieving one form of storage should have technical documentation — lifecycle assessment, MRV reports, placed-in-service records — that actually supports that specific characterization, not just uses the term.
None of this changes the basic mechanism, but it does change who this is actually a strong fit for. A transferred credit is most straightforwardly useful to a buyer with passive income to offset, or to a corporate buyer for whom the passive activity rules generally don't apply in the same way — not to an individual looking to offset W-2 income or business income with no other passive activity in the picture. This is exactly the kind of detail a buyer's CPA needs to confirm against the buyer's specific tax picture before any transaction closes.
What a Buyer's Tax Advisor Should Ask For Before Closing
- The IRS pre-filing registration number, verified independently — not just disclosed in a deck
- The underlying lifecycle assessment or MRV documentation, and confirmation of which storage/utilization category it actually supports
- Placed-in-service documentation establishing the credit was properly generated in the claimed tax year
- A written explanation of how the seller's pricing and contractual terms avoid creating an economic link between the buyer's return and the project's ongoing performance — this is the detail that determines whether a transaction is respected as a transfer or risks recharacterization
- Independent confirmation — not a representation from the seller — of the buyer's own tax capacity to use the credit, including whether the buyer has sufficient passive income for the credit to offset under Section 469, and any §38(c) limitation that may cap usable credits in a single year