IRC 48C and IRC 45X: Qualifying Advanced Energy Project Credit and Advanced Manufacturing Production Credit

This guide is written for enrolled agents, CPAs, and tax attorneys advising clients on advanced manufacturing facilities, clean energy component production, credit monetization, and the compliance implications of the One Big Beautiful Budget Act (OBBBA, signed July 4, 2025) for IRC 48C, IRC 45X, IRC 6418 transferability, and IRC 6417 direct pay. As of July 2026, implementing guidance under OBBBA for these credits remains actively developing; verify all statutory citations, credit rates, eligibility requirements, and IRS procedures at IRS.gov before advising on any specific matter.

All statutory citations, IRS guidance references, credit rates, per-unit credit amounts, phase-down schedules, and regulatory requirements in this guide must be verified against the enacted text of OBBBA, the Internal Revenue Code, current Treasury regulations, and current IRS.gov guidance before being relied on in any specific client matter. Tax law is subject to legislative change and ongoing regulatory development. This guide is for informational purposes only and does not constitute legal or tax advice. IRC 48C and IRC 45X transactions are complex, fact-specific, and subject to active regulatory interpretation; practitioners must review current guidance at IRS.gov before advising.

Section 1: IRC 48C -- Qualifying Advanced Energy Project Credit

IRC 48C provides a federal income tax credit based on the basis of qualifying advanced energy project property placed in service during the tax year. The credit was originally enacted in 2009 and was significantly expanded by the Inflation Reduction Act (IRA) in 2022, which authorized additional allocation rounds and expanded the categories of qualifying projects. The IRA also restructured the credit into a two-tier rate structure (base rate and enhanced rate) tied to prevailing wage and apprenticeship requirements. OBBBA may have further modified the eligible project categories and other provisions; verify current law at IRS.gov.

What Qualifies: Eligible Projects Under IRC 48C(c)(1)

A "qualifying advanced energy project" under IRC 48C(c)(1) generally includes projects that re-equip, expand, or establish manufacturing facilities for the production of specified clean energy equipment and components. The categories of qualifying projects under IRC 48C(c)(1) include, but are not limited to, manufacturing facilities for:

• Solar energy components (including photovoltaic cells, solar modules, and related equipment)
• Wind energy components (including turbine blades, nacelles, towers, and related equipment)
• Geothermal energy property
• Fuel cell and microturbine systems
• Energy storage systems, including grid-scale batteries
• Electric vehicles and electric vehicle charging equipment
• Electrical grid modernization equipment
• Advanced materials used in clean energy applications
• Facilities for industrial decarbonization (reducing greenhouse gas emissions from industrial processes)
• Critical materials processing and manufacturing (including processing of minerals critical to clean energy supply chains)

Hedge the complete list of eligible project categories to IRC 48C(c)(1) as amended by OBBBA and IRS.gov. The eligible categories may have been expanded or modified by OBBBA. Do not advise a client that a specific project type qualifies without first confirming the current definition at IRS.gov and in the enacted statute.

The Allocation Process: Competitive Application Under IRC 48C(e)

A critical feature of IRC 48C that distinguishes it from IRC 45X: no taxpayer can simply claim the IRC 48C credit on its return without going through a competitive allocation process first. Under IRC 48C(e), the credit is available only to projects that have been selected and certified through a multi-step process:

1. Application to the Department of Energy (DOE): The taxpayer submits a concept paper and application to the DOE. The DOE evaluates applications based on technical merit, commercial viability, job creation potential, and other criteria established by the DOE and IRS in applicable guidance.
2. DOE recommendation to Treasury: The DOE recommends projects to the Treasury Department for allocation of the available tax credit amount.
3. IRS certification: The Treasury Department, acting through the IRS, certifies the selected projects and allocates a specific credit amount to each project. The certification specifies the maximum credit amount available to the taxpayer for the qualifying property.
4. Placed-in-service requirement: After receiving certification, the taxpayer must place the qualifying property in service during the tax year. The credit becomes available in the tax year the certified qualifying property is placed in service, not when the certification is issued.

Hedge the current allocation round status, remaining authorized allocation, and all application procedures to IRS.gov and the DOE. The IRS has conducted multiple allocation rounds under the expanded IRC 48C program; the remaining authorization, the application deadline for any current or future round, and the evaluation criteria may have changed after OBBBA. Do not advise a client on the available allocation without first verifying the current program status at IRS.gov and at the DOE's website.

Credit Rate: Base Rate and Enhanced Rate

The IRC 48C credit is computed as a percentage of the basis of the qualifying advanced energy project property placed in service during the tax year. The credit rate structure has two tiers:

• Base credit rate: Applies to projects that do not satisfy the prevailing wage and apprenticeship (PWA) requirements. The base rate is a specified percentage of the qualified investment. Hedge the base credit rate to IRC 48C and IRS.gov; confirm whether OBBBA changed the applicable base percentage.
• Enhanced credit rate: Applies to projects that satisfy the PWA requirements under IRC 48C and applicable IRS guidance (including Notice 2023-29 or the most current guidance superseding it). The enhanced rate is a higher specified percentage of the qualified investment. Hedge the enhanced rate to IRC 48C and IRS.gov; confirm whether OBBBA changed the applicable enhanced percentage.

Do not state specific credit percentages (for either the base rate or the enhanced rate) without first verifying the current applicable rates under IRC 48C as amended by OBBBA at IRS.gov. The rates may have been modified by OBBBA or by subsequent regulatory guidance. Confirm the current PWA requirements, the applicable guidance references (including any Notice superseding Notice 2023-29), and both credit rates at IRS.gov before advising clients. Also confirm with the client's project team whether PWA requirements are satisfied or are achievable, as the choice between base and enhanced rates has a direct impact on project economics.

Manufacturers claiming the IRC 48C credit for a qualifying advanced energy project facility commonly also evaluate whether research and development activities at that facility give rise to credits under IRC 41. The two credits apply to different expenditure categories (IRC 48C to the basis of qualifying property; IRC 41 to qualified research expenses), but manufacturers should coordinate both analyses for the same facility. See the IRC 41 R&D Tax Credit QRE Computation and OBBBA Practitioner Guide for the IRC 41 analysis.

Placed-in-Service Requirement and Timing

The IRC 48C credit is available in the tax year in which the certified qualifying advanced energy project property is placed in service. The certification allocates a maximum credit amount for the project, but the credit is not earned or claimed until the taxpayer actually places the qualifying property in service during the applicable tax year. Taxpayers that receive a certification but delay placed-in-service must verify whether the certification remains effective for the later placed-in-service year; hedge the certification carryover and expiration rules to IRC 48C and IRS.gov.

Because IRC 48C is an investment credit for the property itself, the interaction with bonus depreciation rules under IRC 168(k) (or the new IRC 168(n) qualified production property bonus depreciation enacted by OBBBA) requires careful coordination. A taxpayer claiming both the IRC 48C credit and bonus depreciation on the same qualified property must account for the basis reduction required for property on which an investment credit is taken. See the IRC 168(k) and IRC 168(n) Bonus Depreciation and Qualified Production Property OBBBA Practitioner Guide for the bonus depreciation coordination analysis.

Recapture Risk

If qualifying advanced energy project property for which an IRC 48C credit was claimed ceases to be qualifying property within a specified period after being placed in service, the credit (or a portion of it) may be recaptured and added back to the taxpayer's tax liability. Hedge the recapture period, the recapture computation, and any applicable exceptions to IRC 48C and IRS.gov. Practitioners advising on IRC 48C projects should include the recapture risk in their due diligence analysis, particularly for projects where the qualifying property could be repurposed, sold, or retired within the potential recapture window.

Section 2: IRC 45X -- Advanced Manufacturing Production Credit

IRC 45X provides a per-unit production credit for eligible components produced and sold (or used in further manufacturing of other eligible components) in the United States. The IRC 45X credit was enacted by the IRA in 2022 and represents a fundamentally different structure from IRC 48C: it is a production-based credit (not an investment credit), it requires no competitive application or pre-certification by the DOE or IRS, and it is earned at the time of sale rather than at the time the property is placed in service. OBBBA may have modified certain aspects of IRC 45X; verify current law and per-unit credit amounts at IRS.gov.

What IRC 45X Is: Per-Unit Production at Sale

Under IRC 45X(a)(1), the credit is earned for each eligible component that is produced by the taxpayer and sold (or used by the taxpayer in further manufacturing of an eligible component) during the tax year. The credit amount is a per-unit amount that varies by component type. Several key structural features distinguish IRC 45X from IRC 48C:

• No competitive application required: Any qualifying manufacturer may claim the IRC 45X credit on its return for the tax year in which the eligible components are sold. There is no allocation round, no application to the DOE, and no IRS certification required before claiming the credit.
• Credit earned at sale, not production: Under IRC 45X(a)(1), the credit arises at the time the eligible component is sold (or used in further manufacturing), not at the time it is produced. This timing rule has significant implications for revenue recognition, tax planning, and credit monetization. Hedge the precise recognition rules, including the rules for components used in further manufacturing rather than sold, to IRC 45X and IRS.gov.
• Domestic production requirement: The eligible component must be produced in the United States (including applicable U.S. territories). Hedge the definition of "produced in the United States" to IRC 45X and IRS.gov; this is a key compliance requirement and the definition matters for components assembled from both domestic and imported sub-components.
• Eligible taxpayer is the manufacturer, not the project owner: The IRC 45X credit belongs to the entity that manufactures and sells the eligible component. Downstream project developers or clean energy facility owners who install or use the components do not claim the IRC 45X credit; only the component manufacturer does.

Eligible Component Categories

IRC 45X defines "eligible component" to include components across multiple clean energy technology categories. The categories and the per-unit credit structure are summarized below. Hedge all category definitions, component descriptions, and per-unit credit amounts to IRC 45X, the applicable Treasury regulations (proposed or final), and IRS.gov; these amounts vary by component type, may be updated annually, and OBBBA may have made modifications. Do not state specific per-unit dollar amounts in client materials without first verifying current amounts at IRS.gov.

Solar Energy Components

Solar energy components eligible for the IRC 45X credit include (among others, subject to the statutory definitions and applicable Treasury regulations): photovoltaic cells, photovoltaic wafers, solar modules (including thin-film and crystalline silicon), polymer backsheets, solar-grade polysilicon, junction boxes, mounting structures, and solar tracking systems. The per-unit credit amount for each solar component type is specified in IRC 45X and applicable regulations; verify current amounts at IRS.gov. The credit for certain solar components is subject to a phase-down beginning in a year specified in IRC 45X as amended by OBBBA; hedge the phase-down start date and the annual phase-down percentages to IRC 45X as amended by OBBBA and IRS.gov.

Wind Energy Components

Wind energy components eligible for the IRC 45X credit include (among others, subject to the statutory definitions and applicable Treasury regulations): wind turbine blades, nacelles, towers, and offshore wind foundations and platforms. The per-unit credit for wind components is a specified amount based on rated capacity or another unit measure as defined in IRC 45X and applicable regulations; verify current amounts at IRS.gov. Wind energy components are also subject to a phase-down beginning in a year specified in IRC 45X as amended by OBBBA; hedge the phase-down start date and schedule to IRC 45X as amended by OBBBA and IRS.gov.

Inverters

Inverters (including central inverters, utility inverters, commercial inverters, residential inverters, and microinverters) are eligible components under IRC 45X. The per-unit credit for inverters is specified by inverter type and rated capacity under IRC 45X and applicable regulations; verify current amounts at IRS.gov.

Battery Components

Battery components eligible for the IRC 45X credit include (among others, subject to the statutory definitions and applicable Treasury regulations): battery cells, battery modules, battery electrode active materials (including anode and cathode materials), and battery cell components. The per-unit credit for battery components is specified by component type and capacity under IRC 45X and applicable regulations; verify current amounts at IRS.gov.

Applicable Critical Minerals

Applicable critical minerals produced and sold in the United States qualify for the IRC 45X credit. "Applicable critical minerals" is defined by reference to a list of minerals that are critical to clean energy and national security supply chains. The per-unit credit for critical minerals is a specified percentage of the cost of production (rather than a fixed per-unit amount, as for manufactured components). Hedge the complete list of applicable critical minerals, the applicable credit percentage, and any OBBBA modifications to IRC 45X and IRS.gov; the definition of applicable critical minerals may have been updated.

Phase-Down for Wind and Solar Components

The IRC 45X credit for wind energy components and solar energy components is subject to a phase-down: the per-unit credit amount decreases by a specified percentage for each year after a phase-down start date, ultimately reaching zero. OBBBA may have modified the phase-down start date or the annual phase-down percentages for one or both component categories. Hedge the phase-down start date, the annual phase-down schedule, and any OBBBA modifications to IRC 45X as amended by OBBBA and IRS.gov. Do not state specific phase-down years or percentages in client materials without first confirming current law at IRS.gov.

Related-Party Sales and Domestic Production

The IRC 45X credit generally requires that the eligible component be sold to an unrelated party. Related-party sales may not qualify for the credit, or may be subject to special rules that affect the credit computation. Hedge the related-party rules, including the applicable definition of "related party" for IRC 45X purposes, to IRC 45X and IRS.gov. The domestic production requirement (the component must be produced in the United States or U.S. territories) is a key compliance requirement; practitioners advising manufacturing clients must confirm that the production activity meets the statutory definition of "produced in the United States" under IRC 45X and applicable Treasury regulations.

Manufacturers claiming the IRC 45X credit for eligible components commonly also evaluate whether their manufacturing processes qualify for the R&D tax credit under IRC 41 for the same tax year. Because IRC 45X applies to component production and sales while IRC 41 applies to qualified research expenses (wages, supplies, and contract research costs), the two credits address different cost categories and can be claimed together. See the IRC 41 R&D Tax Credit QRE Computation and OBBBA Practitioner Guide for the IRC 41 analysis applicable to manufacturing operations.

Section 3: Transferability Under IRC 6418

IRC 6418, enacted by the IRA in 2022, created a market for clean energy credits by allowing eligible taxpayers to sell all or any portion of certain credits (including the IRC 48C credit and the IRC 45X credit) to unrelated third parties in exchange for cash. This mechanism allows manufacturers and project developers that cannot fully use their credits against current tax liability to monetize them without entering into the more complex tax equity partnership structures that dominated the market before the IRA. OBBBA modified IRC 6418 to restrict transfers to certain foreign entities; the market for credit transfers to domestic buyers otherwise continues.

Who Can Transfer and Who Can Receive

An "eligible taxpayer" under IRC 6418 may elect to transfer all or any specified portion of an eligible credit (including the IRC 48C credit or the IRC 45X credit) to an unrelated taxpayer. The transferee must be a U.S. taxpayer that is not a "specified foreign entity" (as defined in IRC 6418(f), as amended by OBBBA). Hedge the definition of eligible taxpayer, eligible credit, and the post-OBBBA specified foreign entity restriction to IRC 6418 and IRS.gov. The transferor and transferee must be unrelated within the meaning of the applicable IRC provisions; a related-party transfer is not permitted under IRC 6418.

Tax Treatment of the Transfer: Cash Excluded, Not Deductible

Under IRC 6418(a) and (b), the tax treatment of an IRC 6418 credit transfer is as follows:

• Transferor (seller of the credit): The cash consideration received by the transferor in exchange for the credit is excluded from the transferor's gross income. The transferor does not recognize income on the transfer. Cite IRC 6418(b)(2). Hedge to IRC 6418 and IRS.gov.
• Transferee (buyer of the credit): The cash consideration paid by the transferee for the credit is not deductible by the transferee. The transferee uses the acquired credit dollar-for-dollar against its own U.S. federal income tax liability. Cite IRC 6418(b)(3). Hedge to IRC 6418 and IRS.gov.

The asymmetric tax treatment (income excluded for the seller; deduction denied for the buyer) is a fundamental feature of the IRC 6418 transfer market and affects the economics of any transfer transaction. The transfer price is negotiated between the parties; there is no regulatory floor or ceiling, but the market for clean energy credits has generally reflected a discount to face value that accounts for the tax risk the transferee bears.

FEOC Restrictions Under IRC 6418(f): No Transfer to Specified Foreign Entities

OBBBA amended IRC 6418 to prohibit the transfer of IRC 48C and IRC 45X credits (and other eligible credits) to a "specified foreign entity" as defined in IRC 6418(f). The specified foreign entity concept is related to, but not necessarily identical to, the "foreign entity of concern" (FEOC) concept as defined in the Infrastructure Investment and Jobs Act (IIJA) and used in other clean energy credit contexts. Both definitions are subject to forthcoming Treasury and IRS regulations.

As of July 2026, final regulations defining "specified foreign entity" and "foreign entity of concern" for IRC 6418 and clean energy credit purposes have not been issued. Practitioners must not advise clients on the scope of these restrictions as if the definitions are settled; they are not. The statutory restriction exists and is operative, but its outer boundaries depend on regulatory definitions that remain pending. Verify the current FEOC and specified foreign entity definitions, and any interim or proposed guidance, at IRS.gov and the DOE before advising on any credit transfer transaction with potential foreign-entity connections.

Hedge all aspects of the specified foreign entity restriction, including which entities fall within the definition, to IRC 6418(f) as amended by OBBBA and current IRS.gov guidance. FEOC supply chain due diligence (for IRC 45X credits, confirming that the component supply chain does not include FEOC-connected inputs) and FEOC transferee due diligence (confirming the transferee is not a specified foreign entity) are both required as part of any IRC 6418 transfer transaction involving IRC 48C or IRC 45X credits.

Registration Requirement

Before an IRC 6418 transfer election can be made effective, the eligible taxpayer (transferor) must register the credit with the IRS. The IRS has established a registration process through the IRS Energy Credits Online portal (available at IRS.gov). The registration generates a unique registration number that must be included in the transfer election on the transferor's return. A transfer election made without a valid registration number is not effective.

Hedge all registration requirements, the applicable portal procedures, and the deadline for registration relative to the tax year of the transfer to IRS.gov and the applicable Revenue Procedures. The IRS has issued and continues to update guidance on Energy Credits Online portal registration; confirm current procedures before advising.

One-Time Transfer Rule

Under IRC 6418(a), a credit that has been transferred to a transferee cannot be re-transferred by that transferee to another party. The transfer is a one-time event: the transferee acquires the credit and uses it against its own tax liability, but cannot sell it again. This restriction limits the liquidity of transferred credits in the secondary market and should be addressed in the transfer agreement.

Recapture Risk for the Transferee

In a credit transfer, the recapture risk generally shifts to the transferee: if the underlying property for which the IRC 48C credit was taken ceases to be qualifying property within the recapture period (or if the IRC 45X credit is later determined to be erroneous), the transferee may bear the recapture liability. Practitioners structuring IRC 6418 transfer transactions for IRC 48C or IRC 45X credits should address recapture risk allocation between the parties in the transfer agreement. Hedge all recapture mechanics and the allocation of recapture risk in transfer transactions to IRC 6418 and current IRS.gov guidance.

Market Impact: Clean Energy Credit Transfers Without Tax Equity

IRC 6418 transferability fundamentally changed the clean energy tax credit market. Before the IRA, monetizing clean energy tax credits (other than for tax-exempt entities using direct pay) required entering into a tax equity partnership or sale-leaseback structure, which limited the buyer pool to large financial institutions with substantial federal tax liability. IRC 6418 opened credit purchases to any U.S. taxpayer with sufficient tax liability, including corporations, individuals, and others, creating a broader and more competitive market for clean energy credits. The OBBBA restriction (no transfer to specified foreign entities) narrows this market at the margins but does not affect the domestic credit transfer market for non-FEOC buyers.

Section 4: Direct Pay Under IRC 6417

IRC 6417, enacted by the IRA in 2022, allows "applicable entities" (generally, tax-exempt organizations and governmental entities) to elect to treat the IRC 48C credit and the IRC 45X credit as a payment against tax rather than as a credit that offsets positive tax liability. This "elective payment election" or "direct pay election" converts the credit into a cash refund from the IRS, allowing entities with no federal income tax liability to fully monetize clean energy credits. OBBBA did not repeal IRC 6417; direct pay survives with modifications to address FEOC-related issues.

Who Qualifies as an Applicable Entity

Applicable entities eligible to make the direct pay election under IRC 6417 include (among others, and subject to the specific definitions and requirements in the statute and applicable IRS guidance):

• Tax-exempt organizations described in IRC 501(c), including IRC 501(c)(3) charitable organizations, labor organizations, trade associations, and others described in IRC 501(c)
• State and local governments and their instrumentalities
• Indian tribal governments
• Alaska Native Corporations
• The Tennessee Valley Authority (TVA)
• Rural electric cooperatives described in IRC 501(c)(12)
• Certain other specified entities as defined in IRC 6417 and applicable IRS guidance

Hedge the complete list of applicable entity types, and the eligibility requirements for each category, to IRC 6417 as amended by OBBBA and current IRS.gov guidance. OBBBA may have modified the definition of applicable entities or the eligibility requirements; confirm current rules at IRS.gov before advising any client on direct pay eligibility.

For-profit taxpayers (C corporations, partnerships, S corporations, and individuals) are generally NOT eligible for the direct pay election under IRC 6417 for the IRC 48C and IRC 45X credits. For-profit entities that want to monetize credits they cannot use directly against their own tax liability must use the transferability mechanism under IRC 6418 rather than direct pay. Hedge to IRS.gov.

How Direct Pay Works

An applicable entity that makes a valid direct pay election under IRC 6417 treats the elected credit amount as an overpayment of federal tax. The IRS issues a refund (or applies the overpayment to other outstanding tax obligations) for the elected credit amount. The entity does not need any positive U.S. federal income tax liability to receive the benefit; the full credit amount is refundable to the entity as a cash payment. This makes direct pay the primary (and in most cases the only) mechanism for tax-exempt and governmental entities to monetize IRC 48C and IRC 45X credits they earn from clean energy manufacturing activities.

FEOC-Related Restrictions on Direct Pay

OBBBA amended IRC 6417 to impose FEOC-related restrictions on the direct pay election for certain credits. Where a facility or component for which direct pay is sought has supply chain connections to a foreign entity of concern (FEOC), the direct pay amount may be subject to a phase-down or other limitation. Hedge the FEOC-related direct pay restrictions, including the applicable phase-down schedule and the definition of FEOC for IRC 6417 purposes, to IRC 6417 as amended by OBBBA and IRS.gov. As of July 2026, final regulations implementing the FEOC restrictions on direct pay have not been issued; monitor IRS.gov and Treasury for current guidance.

Election Mechanics

The direct pay election is made annually on the applicable entity's return (or, for tax-exempt organizations, on the applicable Form 990 series return, or on a separate form as required by the IRS). The election must be made by the due date (including extensions) of the applicable return. The IRS has established a registration requirement for direct pay elections, similar to the IRC 6418 registration requirement; applicable entities must register through the IRS Energy Credits Online portal to receive a registration number before making the election.

Hedge all election procedures, applicable form numbers, portal registration requirements, and filing deadlines to IRS.gov and the applicable IRS notices and Revenue Procedures. These procedures are subject to ongoing IRS guidance and may have been updated after OBBBA. Confirm current procedures at IRS.gov before advising any client on the mechanics of the direct pay election.

Section 5: Anti-Duplication Rule and Coordination With Other Credits

A taxpayer that is engaged in both the manufacturing of clean energy components (at a qualifying advanced energy project facility) and the production and sale of those components must carefully navigate the interaction between IRC 48C and IRC 45X. Both credits may be available to the same taxpayer, but for different activities, and the anti-duplication rule under IRC 45X(d) restricts the ability to claim both credits for the same property.

IRC 48C vs. IRC 45X: Different Bases, Potentially the Same Taxpayer

The fundamental distinction is this: IRC 48C is a credit for the investment in the manufacturing FACILITY (the basis of the qualifying advanced energy project property placed in service); IRC 45X is a per-unit credit for the COMPONENTS produced at that facility (earned at the time of sale). An integrated manufacturer that both builds a qualifying advanced energy project facility and then uses it to produce and sell eligible components is engaging in two distinct activities that may each independently give rise to credits. The two credits address different tax bases:

• IRC 48C credit base: The tax basis of the qualifying advanced energy project property placed in service (the factory, equipment, and other qualifying property used in the manufacturing process).
• IRC 45X credit base: The per-unit production output of the facility (each eligible component produced in the United States and sold to an unrelated party during the tax year).

Despite addressing different bases, there is an anti-duplication rule: hedge the specific rule to IRC 45X(d) and applicable Treasury regulations and IRS.gov. The anti-duplication rule prevents claiming both credits for the same property and is intended to prevent double-counting of the same manufacturing investment. Practitioners advising integrated manufacturers should analyze the anti-duplication rule carefully and confirm the current rule, including any Treasury regulations or IRS guidance providing specific mechanical rules for its application, at IRS.gov.

IRC 45Y and IRC 48E: A Completely Different Credit Framework

Practitioners must be clear on which credit applies to which activity:

• IRC 48C: Credit for the investment in a clean energy MANUFACTURING FACILITY (the factory and equipment used to produce clean energy components). The taxpayer is the manufacturer. Confirm current law at IRS.gov.
• IRC 45X: Per-unit credit for the COMPONENTS produced and sold at the manufacturing facility. The taxpayer is still the manufacturer. Confirm current law at IRS.gov.
• IRC 45Y: A per-kilowatt-hour credit for CLEAN ELECTRICITY produced by a qualifying clean electricity facility and sold to an unrelated party. The taxpayer is the clean electricity project owner (the wind farm operator, the solar park owner, etc.), not the component manufacturer. Confirm current law at IRS.gov.
• IRC 48E: A percentage-of-investment credit for INVESTMENT in a qualifying clean electricity facility (and qualifying energy storage technology). The taxpayer is the clean electricity project owner, not the component manufacturer. Confirm current law at IRS.gov.

Hedge the distinctions among IRC 48C, IRC 45X, IRC 45Y, and IRC 48E to the respective IRC sections and IRS.gov. A component manufacturer that sells solar modules to a solar farm owner is the IRC 45X taxpayer; the solar farm owner that installs those modules and generates electricity is potentially the IRC 45Y or IRC 48E taxpayer. The two activities are related but distinct for tax purposes, and the two credit regimes do not overlap.

For a full practitioner analysis of the IRC 45Y and IRC 48E framework, including the OBBBA construction-start deadline (which has already passed as of July 2026) and the OBBBA modifications to transferability and direct pay for electricity production and investment credits, see the Clean Energy Credits After OBBBA: Section 45Y, 48E, Transferability, and Direct Pay Practitioner Guide.

Section 48 ITC Transition and OBBBA

Before the IRA (2022), many solar and storage projects claimed the prior Section 48 investment tax credit. The IRA replaced Section 48 with Section 48E for facilities placed in service after December 31, 2024, subject to applicable transition rules. OBBBA further modified the Section 48E framework. Projects that began construction under the prior Section 48 rules, and that meet the applicable transition rules, may still be governed by prior Section 48 rather than Section 48E. Hedge the Section 48 to Section 48E transition rules, and any OBBBA modifications to the transition, to the applicable IRC sections and IRS.gov. The transition framework is distinct from the IRC 48C and IRC 45X credits, which remained operative as discrete manufacturing and production credits throughout the transition period.

Bonus Depreciation Coordination for IRC 48C Property

Because IRC 48C is an investment credit, the basis of qualifying advanced energy project property placed in service is subject to the general basis reduction rule for investment tax credits under IRC 50(c). A taxpayer that claims the IRC 48C credit on qualifying property must reduce the depreciable basis of that property by a portion of the credit amount. This basis reduction directly affects the bonus depreciation deduction available on the same property under IRC 168(k) (or IRC 168(n) for qualified production property under OBBBA). Practitioners advising manufacturers on both the IRC 48C credit and bonus depreciation on the same property must model the basis reduction and its effect on bonus depreciation before finalizing the return position. See the IRC 168(k) and IRC 168(n) Bonus Depreciation and Qualified Production Property OBBBA Practitioner Guide for the basis reduction and coordination analysis.

Section 6: OBBBA Changes and Practitioner Verification Checklist

The One Big Beautiful Budget Act (OBBBA, signed July 4, 2025) made changes to multiple provisions governing IRC 48C, IRC 45X, IRC 6418, and IRC 6417. As of July 2026, the Treasury Department and IRS had not finalized all implementing guidance under OBBBA for these credits. Before advising any client on IRC 48C or IRC 45X transactions, practitioners must verify the current state of the law and regulations at IRS.gov.

OBBBA Provisions Requiring Verification

Verify each of the following at IRS.gov before advising any client:

1. Eligible project categories under IRC 48C(c)(1): Confirm the current list of qualifying advanced energy project categories after OBBBA modifications. OBBBA may have expanded, contracted, or otherwise modified the eligible categories. Do not assume the pre-OBBBA category list remains unchanged.
2. IRC 48C credit rates: Confirm both the base credit rate and the enhanced (PWA-compliant) credit rate under IRC 48C as amended by OBBBA. Do not state specific percentages without confirming current law.
3. IRC 48C allocation round status: Confirm the current status of the IRC 48C allocation program at IRS.gov and the DOE, including whether a new allocation round has been announced, the remaining authorized allocation, and the applicable application deadline and procedures. This information changes as rounds open and close and as OBBBA modifies the authorized amounts.
4. Per-unit credit amounts under IRC 45X: Confirm the current per-unit credit amounts for each eligible component category (solar, wind, inverters, battery components, critical minerals) under IRC 45X as amended by OBBBA and applicable Treasury regulations (final or proposed). Amounts vary by component and may have been updated.
5. Phase-down schedule under IRC 45X: Confirm the phase-down start date and annual phase-down percentages for wind components and solar components under IRC 45X as amended by OBBBA. Do not state specific phase-down years or percentages without confirming current law.
6. FEOC rules under IRC 6418(f) and IRC 6417: Confirm the current definition of "specified foreign entity" under IRC 6418(f) as amended by OBBBA, and the FEOC-related phase-down rules under IRC 6417 as amended by OBBBA. As of July 2026, final regulations have not been issued; monitor IRS.gov and Treasury for final rules before advising on any transfer or direct pay transaction with FEOC exposure.
7. Current IRS guidance (Notices, Revenue Procedures, and regulations): Confirm the most current Revenue Procedures governing IRC 6418 credit transfer registration and election procedures; the most current Notices governing IRC 6417 direct pay election mechanics; any final or proposed Treasury regulations under IRC 45X (addressing eligible component definitions, per-unit amounts, and related-party and domestic production rules); and any new IRS notices or Revenue Procedures issued after OBBBA's enactment.
8. Anti-duplication rule under IRC 45X(d): Confirm the current mechanical rules governing the anti-duplication rule between IRC 48C and IRC 45X, including any Treasury regulations that address the interaction for integrated manufacturers.

Key Open Questions as of July 2026

Several significant regulatory questions remain open as of July 2026:

• FEOC final regulations: Final regulations from Treasury and the DOE definitively resolving the definition of "foreign entity of concern" and "specified foreign entity" for IRC 6418 and IRC 6417 purposes had not been issued as of July 2026. Do not advise clients on FEOC compliance as if the definition is settled; monitor IRS.gov and DOE for final rules.
• IRC 45X Treasury regulations: Proposed and final Treasury regulations under IRC 45X addressing the complete list of eligible components, per-unit credit amounts, related-party rules, domestic production requirements, and the interaction with the anti-duplication rule under IRC 45X(d) continue to develop. Confirm the current status of these regulations at IRS.gov before advising on IRC 45X positions.
• IRC 48C Round 3 and beyond: The IRS and DOE had announced multiple allocation rounds under the expanded IRC 48C program. Confirm the current round status, remaining authorization, and application procedures at IRS.gov and the DOE website before advising any client on pursuing an IRC 48C allocation.

State Conformity: Do Not Assume

Most states do not conform to the federal IRC 48C and IRC 45X credits as a state income tax credit. Even where a state conforms to the federal credit for income tax purposes, the state treatment of IRC 6418 transfer proceeds (which are excluded from federal gross income) and IRC 6417 direct pay receipts may differ from the federal treatment. Hedge all state conformity questions to applicable state law and the applicable state tax agency; do not make any state-specific credit claims without first confirming the state's conformity position. State conformity varies significantly and can change when states enact legislation conforming to or decoupling from federal changes.

Frequently Asked Questions

Common questions from enrolled agents, CPAs, and tax attorneys advising clients on IRC 48C and IRC 45X credits after OBBBA.

Related Practitioner Guides

The following guides cover OBBBA provisions and related tax issues that intersect with IRC 48C and IRC 45X planning for advanced manufacturing and clean energy clients.

• IRC 25C and 25D Residential Energy Credit OBBBA Termination Guide -- practitioners advising on commercial energy incentives (IRC 48C and IRC 45X) should understand the concurrent OBBBA termination of residential energy credits (IRC 25C and 25D); clients may have questions about both programs.
• IRC 41 R&D Tax Credit QRE Computation Form 6765 OBBBA Practitioner Guide -- manufacturers claiming IRC 48C or IRC 45X credits for the same manufacturing activities commonly also evaluate IRC 41 R&D credits. The two credits apply to different cost bases (IRC 48C to property basis; IRC 45X to per-unit production; IRC 41 to qualified research expenses), but the credits are not mutually exclusive for the same manufacturing operation.
• IRC 168(k) and IRC 168(n) Bonus Depreciation Qualified Production Property OBBBA Practitioner Guide -- IRC 48C is an investment credit for qualifying property; the basis reduction required under IRC 50(c) for property on which an investment credit is taken directly affects the bonus depreciation available on the same property. Coordination between IRC 48C and IRC 168(k) (or the new IRC 168(n) qualified production property bonus depreciation under OBBBA) is essential for any client claiming both.
• IRC 163(j) Business Interest Limitation OBBBA Practitioner Guide -- energy manufacturing companies are typically capital-intensive and carry significant debt financing. The IRC 163(j) business interest expense limitation frequently applies to IRC 48C and IRC 45X manufacturers; OBBBA modified the IRC 163(j) ATI add-back and other provisions that affect the deductibility of interest expense for capital-intensive manufacturers.
• CAMT Corporate Alternative Minimum Tax Form 4626 AFSI and OBBBA Practitioner Guide -- large energy manufacturers and clean energy component producers with adjusted financial statement income (AFSI) of $1 billion or more are subject to the corporate alternative minimum tax (CAMT) under IRC 55. The IRC 48C and IRC 45X credits are general business credits; their interaction with the CAMT, and the extent to which they can offset CAMT liability, is a critical planning issue for large energy manufacturers.
• Clean Energy Credits After OBBBA: Section 45Y, 48E, Transferability, and Direct Pay Practitioner Guide -- covers the Section 45Y clean electricity production credit and Section 48E clean electricity investment credit (the credits that apply to electricity generation from clean energy projects, not to component manufacturing); explains the OBBBA construction-start deadline (which has already passed as of July 2026) and the OBBBA modifications to transferability and direct pay for electricity production and investment credits.

Tax Software Built for Complex Credit Work

Americas Tax has supported enrolled agents, CPAs, and tax attorneys handling complex federal tax credit matters since 2001. Our team understands the compliance requirements and practitioner workflows that IRC 48C and IRC 45X transactions demand.