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Treasury and IRS Release Proposed 45Z Clean Fuel Tax Credit Rules

by Brianna Welsh | Feb 17, 2026 | RFS Updates, RINSTAR News, Tax Credits

On February 3, the U.S. Treasury and IRS released proposed regulations for the Section 45Z Clean Fuel Production Tax Credit, incorporating updates from the One Big Beautiful Bill passed in 2025. The rules are intended to help domestic producers determine eligibility...

EPA News Grab Bag: Biodiesel Tax Credits, SAF Incentives & Key RFS Signals for 2026

by Brianna Welsh | Jan 7, 2026 | RFS Updates, RINs

As 2025 comes to a close, renewable fuels policy has seen no shortage of movement. From proposed tax credit reinstatements to renewed attention on sustainable aviation fuel incentives, several developments are already influencing market conversations. In this grab...

RIN Haircut Debate: How a 50% RIN Credit for Imports Could Reshape Biomass-Based Diesel Markets

by Brianna Welsh | Dec 19, 2025 | RFS Updates, RINs

Here at RINSTAR, we’ve been closely following the “Half RIN” debate because of its impacts across the market offering advantages for some obligated parties while creating new compliance considerations for others. Half RIN aka RIN Haircut is the proposed lowering of...

EPA Refinery Exemptions Trigger Backlash and Investigations

by Brianna Welsh | Nov 17, 2025 | RFS Updates, RINSTAR News

On November 7, 2025, the EPA announced a new set of Small Refinery Exemptions (SREs) under the RFS. The decision covers 16 petitions from eight refineries for the 2021–2024 compliance years. The final tally: 2 full exemptions granted 12 partial (50%) exemptions...

Industry Voices Push for Full SRE Reallocation at EPA’s Supplemental RFS Hearing

by Brianna Welsh | Oct 10, 2025 | RFS Updates, RINSTAR News

  The EPA held a virtual public hearing on October 1, 2025, to gather feedback on its Supplemental Notice of Proposed Rulemaking (SNPRM). The proposal outlines several options for reallocating RFS RVOs that were previously waived under the Small Refinery...

RFS Shakeups: SRE Reallocation, 2024 Cellulosic Waiver, and GHG Reporting

by Brianna Welsh | Sep 19, 2025 | RFS Updates

The past two weeks have been eventful in the RFS space. Recent actions by the EPA, Congress, industry coalitions, and advocacy groups are attempting to reshape how the RFS is applied, especially regarding waivers, blended volume requirements, and reporting...
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Recent Posts

  • Assigned vs. Separated RINs: Understanding K1 and K2 Under the Renewable Fuel Standard
  • Treasury and IRS Release Proposed 45Z Clean Fuel Tax Credit Rules
  • Efficient Producer Petition (EP3) Guide for 2026: How Ethanol Plants Can Generate More RINs Under the RFS
  • EPA & Biofuels Roundup: Production Records, Policy Shifts, and Regulatory Updates
  • 2025 RIN Trends: How RINSTAR Data Compares to National RFS Activity
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