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Construction Start Deadline

Projects must begin construction to qualify for full tax credits

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Target Date: July 3, 2026

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FEOC Deadline

Foreign entities of concern restrictions take full effect

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Target Date: December 31, 2025

0% of time elapsed since enactment

Track the One Big Beautiful Bill Act's Climate Provisions

Your comprehensive resource for understanding how the "One Big Beautiful Bill Act" transforms clean energy tax credits, sets construction deadlines, and implements foreign entity restrictions. Get tax credit summaries, news, expert analysis, and compliance calculations all in one place.

Tax Credits

Tax Credits

IRA to OB3 Transition

IRA ERA (Through Dec 31, 2024)
TRANSITION PERIOD (Jan 1 - Jul 4, 2025)
OBBB ERA (After Jul 4, 2025)
Section 45 PTC (Legacy Renewable)
Section 45Y PTC (Clean Energy)
Construction: Begin by Dec 31, 2024
Construction: Begin by Dec 31, 2032
Sunset: Later of 2032 or emissions targets
FEOCTaxpayer cannot be SFE/FIE after Dec 31, 2025; Material Assistance prohibited after Dec 31, 2025
Wind/Solar: Begin by July 4, 2026 OR placed in service by Dec 31, 2027; Other Tech: Begin by Dec 31, 2033
Other Tech Sunset: Phaseout starts 2034
i

Other Tech

  • Geothermal power generation
  • Hydropower facilities
  • Biomass facilities
  • Advanced Nuclear facilities
  • Any other zero or negative lifecycle greenhouse gas emissions electricity generation technology
Section 48 ITC (Legacy Energy)
Section 48E ITC (Clean Electricity)
Construction: Begin by Dec 31, 2024
Geothermal heat pumps: phaseout 2032-2034
i 30% credit for geothermal projects constructed by Dec 31, 2032; Credit reduces to 26% in 2033 and 22% in 2034
Construction: Begin by Dec 31, 2032
Sunset: Later of 2034 or emissions targets
FEOCTaxpayer cannot be SFE/FIE after Dec 31, 2025; Material Assistance prohibited after Dec 31, 2025; 100% recapture risk
Wind/Solar: Begin by July 4, 2026 OR placed in service by Dec 31, 2027; Other Tech: Begin by Dec 31, 2033
Other Tech Sunset: Phaseout starts 2034
i

Other Tech

  • Geothermal power generation
  • Hydropower facilities
  • Biomass facilities
  • Energy Storage Technology (batteries, pumped hydro, etc.)
  • Fuel Cell Property
  • Any other zero or negative lifecycle greenhouse gas emissions electricity generation technology
Section 45X PTC (Manufacturing)
Based on: production/sale dates
Components Sunset: Phaseout 2030-2032
Minerals: Permanent
Based on: production/sale dates
Components Sunset: Phaseout 2030-2032
Minerals: Permanent
FEOCTaxpayer cannot be SFE/FIE after Dec 31, 2025; Material Assistance prohibited after Dec 31, 2025
Based on: production/sale dates
Wind components: Terminated after Dec 31, 2027
Integrated components: Terminated after Dec 31, 2026
Metallurgical coal: Terminated after Dec 31, 2029
Critical minerals: Phaseout 2031-2033
Other eligible components: Sunset 2030-2032 (unchanged)
Section 45V PTC (Clean Hydrogen)
Construction: Begin by Dec 31, 2032
i Note: Credit created in IRA but implementation begins Jan 1, 2025
FEOCNone (notably exempt)
Construction: Begin by Dec 31, 2027
Section 45Q Credit (Carbon Capture)
Construction: Begin by Jan 1, 2033
Construction: Begin by Jan 1, 2033
FEOCTaxpayer cannot be SFE/FIE after Dec 31, 2025
Construction: Begin by Jan 1, 2033 (unchanged)
Section 45U PTC (Nuclear Power)
Applies to: existing facilities
Sunset: Dec 31, 2032
Applies to: existing facilities
Sunset: Dec 31, 2032
FEOCTaxpayer cannot be SFE after Dec 31, 2025; Cannot be FIE 2 years post-enactment (Jul 4, 2027)
Applies to: existing facilities
Sunset: Dec 31, 2032 (unchanged)
Section 45Z PTC (Clean Fuel)
Based on: fuel sale dates
Sunset: Dec 31, 2027
i Note: Credit created in IRA but implementation begins Jan 1, 2025
FEOCTaxpayer cannot be SFE after Dec 31, 2025; Cannot be FIE 2 years post-enactment (July 4, 2027)
Based on: fuel sale dates
Sunset: Extended to Dec 31, 2029
Vehicle Credits (30D, 25E, 45W)
FEOCLimited (EV battery supply chain only)
Based on: Purchase/acquisition
Sunset: Dec 31, 2032
FEOCLimited (EV battery supply chain only)
Based on: Purchase/acquisition
Sunset: Dec 31, 2032
TERMINATED
FEOCN/A (credits terminated)
30D & 25E & 45W: Terminated Sept 30, 2025
30C (Refueling): Terminated June 30, 2026
Residential Credits (25C, 25D, 45L)
Based on: Installation/acquisition
25C: Through 2032; 25D: Through 2034; 45L: Through 2033
Based on: Installation/acquisition
25C: Through 2032; 25D: Through 2034; 45L: Through 2033
TERMINATED
FEOCN/A (credits terminated)
25C: Terminated Dec 31, 2025; 25D: Terminated Dec 31, 2025
45L: Terminated June 30, 2026; 179D: Terminated June 30, 2026
  • SFE (Specified Foreign Entity): companies and persons from China, North Korea, Russia, and Iran, as well as parties specifically identified on a list of concerning actors, such as foreign terrorist organizations, OFAC-listed entities, Chinese military companies, or Uyghur Forced Labor list entities
  • FIE (Foreign Influenced Entity): Entities where SFEs have ≥25% ownership (single) or ≥40% (combined), ≥15% debt ownership, board appointment authority, or "effective control" through payments
  • FEOC (Foreign Entity of Concern): Encompasses both SFEs and FIEs as defined above
  • Material Assistance: Includes engineering, procurement, construction, operation, maintenance, or financial support from prohibited entities

Quick Look

45Q Rate Structure Document

45Y
Credit Details

Rate Information
Change Description
45Y
Modified

Clean Energy Production

Modified requirements
Wind and solar must be placed in service before Dec. 31, 2027
48E
Modified

Clean Energy Investment

Modified requirements
Wind and solar must be placed in service before Dec. 31, 2027
45X
Phased-Out

Advanced Manufacturing

Multiple phase-outs
Various deadlines by component type
45V
Phased-Out & No FEOC

Clean Hydrogen

Eliminated
For projects beginning construction after Dec. 31, 2027
45Q
Price Change

Carbon Oxide Sequestration

$17/ton base rate
Updated standard starting in 2025
45U
FEOC Only

Nuclear Power Production

No change
Status unchanged
45Z
Extended

Clean Fuel

Extended
Extended through Dec. 31, 2029
EV
Phased-Out

EV Credits

Multiple termination dates
Various EV credits ending between 2025-2026
RES
Phased-Out

Residential Credits

Multiple termination dates
Various residential credits ending between 2025-2026

FEOC Calculator

Find Requirements

Select a project/component type and year to see material assistance thresholds.

Project & Component Type

Material Assistance Threshold

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Tax Code Details

Analysis & News

Top Analysis

K&L Gates

August 18, 2025

IRS Notice 2025-42: What Renewable Developers Need to Know on Beginning of Construction Rules

McGuireWoods

August 15, 2025

IRS Notice 2025-42 Leaves Beginning of Construction Guidance for Wind and Solar Mostly Unchanged, But Limits 5% Safe Harbor to Low-Output Solar Facilities

Foley and Lardner LLP

August 15, 2025

Treasury Releases New Beginning of Construction Guidance for Wind and Solar

Latest Developments

I.R.S. Makes It Harder for Wind and Solar Projects to Claim Tax Breaks

 August 15, 2025

The move comes as the Trump administration has issued a barrage of new restrictions on renewable energy across the country.

The Wind Empire Strikes Back

 August 13, 2025

Senators Chuck Grassley and Mike Curtis are leveraging judicial nominations as political pawns—effectively holding them hostage—to push for an extension of wind-energy tax credits.

Over $6.7 billion in U.S. clean energy projects cancelled in June

 July 24, 2025

Over 5,300 jobs were lost in the month of June alone as negative policy outcome and ongoing uncertainty led to canceled projects and factories, said the E2 and the Clean Economy Tracker.

Tax Code References - OBBB Climate Sources

Tax Code References

Reference guide for One Big Beautiful Bill Act (H.R. 1) legislative sections affecting various tax credits and clean energy programs.

Change Type
§45Y Clean Electricity PTC
§48E Clean Electricity ITC
§45X Advanced Manufacturing
§45V Clean Hydrogen
§45Q Carbon Oxide
§45U Nuclear PTC
§45Z Clean Fuel
EV Credits
Residential Credits
Wind & Solar Deadline / Termination
Sec. 70512(a)(4)(A)-(B)
Sec. 70513(a)(4)(A)-(C)
Other Tech Phase-out / Sunsets
Sec. 70512(a)(3), (g)
Sec. 70513(b)(2), (d)
Sec. 70514(b)
Sec. 70511
Sec. 70522(b), (b)(2)(A)
Sec. 70521(d)
Sec. 70501-70504
Secs. 70505–70508, 70507
FEOC / "Prohibited Foreign Entity" Restrictions
Sec. 70512(b)(2), (g)(13)
Sec. 70513(b)(2)
Sec. 70514(c)(2), (d)(4)
Sec. 70522(a)
Sec. 70510(a)
Sec. 70521(k)
"Material Assistance" from PFEs Prohibited
Sec. 70512(b)(1), §7701(a)(52)
Sec. 70513(b)(1), (c)(3)
Sec. 70514(c)(1)
Leasing Denial (3rd-party Residential Lease)
Sec. 70512(d)
Sec. 70513(c)(1)-(2)
Domestic Content / Bonus Adjustments & Recapture
Sec. 70512(e)
Sec. 70513(d), (b)(3)-(4)
Penalties, Transferability Limits
Sec. 70512(h)
Sec. 70513(b)(3)
Sec. 70514(c)
Sec. 70521(g)(1)-(2), (h)
Definitions Expanded / New Thresholds
Sec. 70512(c), §7701(a)(51)-(52)
Sec. 70513(b)
Sec. 70514(c), (d)-(e)
Sec. 70512(f)
Sec. 70521(a)-(f)
Effective Date(s) Call-outs
Sec. 70512(l)(4), (l)(2)
Sec. 70513(g)(5), (g)(2)-(3)
Sec. 70514(f)
Sec. 70511
Sec. 70522(d)
Sec. 70510(b)
Sec. 70521(d), (k)(2)
Sec. 70501–70504
Secs. 70505–70508, 70507

Resources

Podcasts

LinkedIn

Official Sources & Policy Documents

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