Power & Policy No. 05 · Federal · U.S. Congress; Department of the Treasury; Internal Revenue Service
Federal clean-energy tax credits now turn on when a project begins construction
Technology-neutral credits under sections 45Y and 48E remain available, but 2025 legislation added earlier phase-out dates for wind and solar and foreign-entity restrictions — making construction-start timing a central design decision.
- Federal incentives
- Infrastructure funding
- Workforce requirements
Not legal advice
This series is published for general information. It is not legal advice, regulatory advice, or tax advice, and it does not create any professional relationship. Rules change, apply differently by jurisdiction, and turn on facts specific to each project. Consult qualified legal, regulatory, and tax counsel before acting.
The Intelligent Infrastructure Review · Published August 1, 2026 · Record checked August 1, 2026 · 12 min read
In this installment
How the technology-neutral credits work, what the 2025 changes did to eligibility timing, and why beginning-of-construction documentation has become one of the highest-value items in a development file.
Policy or regulatory development
The Inflation Reduction Act of 2022 replaced the legacy production and investment tax credits with technology-neutral credits under Internal Revenue Code sections 45Y and 48E for facilities placed in service after 2024, with bonus rates tied to prevailing wage and apprenticeship requirements. Legislation enacted July 4, 2025 modified these provisions, including earlier termination dates for certain wind and solar facilities and new restrictions related to foreign entities of concern. Treasury and the IRS have issued guidance on beginning of construction and related requirements.
Jurisdiction
Level
Federal
Authority
U.S. Congress; Department of the Treasury; Internal Revenue Service
Where it applies
Federal income tax credits available to taxpayers owning qualifying facilities and energy property in the United States. State and local incentives operate separately and are unaffected.
Who is affected
- Project sponsors and owners
- Credit value, and whether a credit is available at all, depends on technology, construction-start date, placed-in-service date, and supply-chain composition.
- Investors and tax-equity providers
- Eligibility risk is diligenced closely, and documentation of construction start is a condition of most transactions.
- EPC firms and contractors
- Prevailing wage and apprenticeship requirements for bonus rates flow into subcontracts, payroll records, and reporting obligations.
- Equipment suppliers
- Domestic content and foreign-entity provisions affect which supply chains preserve full credit value.
- Data centers and large energy users
- On-site generation and storage economics — and therefore the cost of self-supply relative to waiting for the grid — depend directly on these credits.
What changed
- Sections 45Y and 48E provide technology-neutral production and investment credits for qualifying facilities placed in service after 2024, replacing the legacy technology-specific credits.
- Full credit rates are conditioned on satisfying prevailing wage and apprenticeship requirements, with reduced base rates otherwise; bonus adders exist for domestic content and for energy communities.
- Legislation enacted July 4, 2025 introduced earlier termination dates for certain wind and solar facilities, tied to construction start and placed-in-service timing.
- New restrictions relating to foreign entities of concern apply to ownership, control, and material assistance in the supply chain.
- Treasury and IRS guidance addresses what constitutes beginning of construction, including physical work and cost-based approaches and continuity requirements.
- Credit transferability and elective payment mechanisms remain the principal routes for monetizing credits outside a traditional tax-equity structure.
Official sources
- Internal Revenue Service · Clean Electricity Production Credit (§45Y) and Clean Electricity Investment Credit (§48E) · January 15, 2025
- Internal Revenue Service · Prevailing wage and apprenticeship requirements for increased credit amounts · June 18, 2024
- U.S. Congress · Public Law 119-21 (enacted July 4, 2025) · July 4, 2025
Why it matters
For an energy-intensive project, on-site generation and storage are often the only supply options within the sponsor's control. Their viability frequently depends on credit value. When eligibility turns on a construction-start date, the incentive question stops being a financing detail handled at closing and becomes a scheduling decision made during design — with a hard deadline attached. A project that slips past a threshold can lose value that no amount of engineering optimization recovers.
Potential project impacts
Schedule
Construction-start deadlines can dominate sequencing, pulling procurement and site work earlier than the technical schedule alone would require.
Technology selection
Different technologies face different termination timelines, which can change the relative case for storage, thermal generation, and renewables at the same site.
Procurement
Supply-chain composition affects both bonus adders and eligibility, so sourcing decisions carry tax consequences and require documentation.
Labor
Prevailing wage and apprenticeship compliance must be built into subcontracts and payroll systems from the first hour of work, not reconstructed later.
Capital structure
Transferability and elective payment change who can realize the value, which affects ownership structure and the choice between owning and contracting for on-site supply.
Timing and implementation considerations
Technology-neutral credits apply
Placed in service after 2024Sections 45Y and 48E apply to qualifying facilities placed in service after December 31, 2024.
2025 legislation enacted
July 4, 2025Public Law 119-21 modified the credits, including termination timing for certain wind and solar facilities and foreign-entity restrictions.
Beginning of construction
Project-specific; documented as it happensWhether a facility has begun construction is determined under IRS guidance, generally through physical work of a significant nature or a cost-based test, with a continuity requirement. Documentation must be contemporaneous.
Continuing guidance
OngoingTreasury and the IRS continue to issue guidance and regulations implementing the 2025 changes. Confirm the current position before relying on any summary.
Risks and uncertainties
This is not tax advice
Eligibility is fact-specific and depends on structure, technology, timing, and supply chain. Every conclusion here needs to be confirmed with qualified tax counsel for the specific project.
Guidance is still developing
Implementation of the 2025 changes is ongoing. Positions taken on the basis of interim guidance can require revisiting.
Documentation failure
Construction-start and labor-compliance claims are only as strong as the contemporaneous records supporting them. Reconstruction after the fact is the common failure mode.
Supply-chain exposure
Foreign-entity restrictions can reach through tiers of a supply chain that a sponsor does not directly contract with.
Further legislative change
Tax provisions have changed materially twice in three years. A twenty-year asset should be tested against a case where the credit is not available.
Questions project teams should ask
For your tax counsel and advisors
- Under current law and guidance, which credit applies to this technology, and what are the controlling dates?
- What specifically must occur, and be documented, for this facility to be treated as having begun construction?
- How do the foreign-entity provisions apply to our ownership structure and our equipment supply chain?
- Is the project better served by ownership, transfer of credits, or a contracted supply structure?
For your EPC and procurement teams
- Are prevailing wage and apprenticeship obligations written into every relevant subcontract, with reporting that satisfies a later review?
- Can suppliers provide the documentation needed to support domestic content and supply-chain positions?
- What is the earliest defensible construction-start action, and what does it cost to take it now?
For your own team
- Does the project clear its hurdle rate if the credit is reduced or unavailable?
- Who owns the documentation file, and is it being maintained contemporaneously rather than assembled at closing?
- If the deadline cannot be met, does the technology mix or the supply strategy change?
GRIDSTROM perspective
GRIDSTROM perspective · opinion, not reporting
Our practical view is that incentive timing has become a scheduling discipline rather than a financing exercise. The projects that capture the value are the ones where the tax position, the procurement plan, and the construction schedule were built together, with a documentation file maintained from the first day of site work. Two habits are worth adopting regardless of how the law moves next: underwrite the project so it still works at a reduced credit, and never let the incentive drive a design the site cannot support. Credits improve a sound project. They do not rescue one whose load, interconnection, or offtake was wrong to begin with.
This series is published for general information. It is not legal advice, regulatory advice, or tax advice, and it does not create any professional relationship. Rules change, apply differently by jurisdiction, and turn on facts specific to each project. Consult qualified legal, regulatory, and tax counsel before acting.
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