Rewriting the RFS Playbook: The Impact of Final RVOs on Projected Biomass-Based Diesel Production and Imports for 2026-2027

Key Takeaways

• 2026 D4 RIN requirement jumps 55% to 10.99 billion gallons
• Domestic biodiesel and renewable diesel must run at 90‑95% capacity
• Imports need 600 million gallons in 2026, 1.3 billion in 2027
• Early‑2026 generation lagged, creating 1.4 billion‑gallon shortfall
• Policy limiting imported biofuels could strain domestic production margins

Pulse Analysis

The Renewable Fuel Standard’s latest Set 2 rule marks a watershed moment for the U.S. biomass‑based diesel market. By raising the Renewable Volume Obligation to over 9 billion gallons for both 2026 and 2027, the EPA has forced D4 RIN generation to climb to historic levels—10.99 billion gallons in 2026 and 11.89 billion in 2027. These figures translate into a physical production target of more than 6 billion gallons each year, demanding that biodiesel and renewable diesel plants operate at 90‑95% of name‑plate capacity, a utilization rate never sustained in recent history.

Achieving such output hinges on two interlinked supply streams: domestic feedstock and imported diesel. The analysis estimates that imports must rise to roughly 600 million gallons in 2026 and double to 1.3 billion gallons in 2027 to fill the RIN gap. Yet imports have collapsed under the 45Z credit, which excludes foreign biofuels, leaving the domestic sector to shoulder the bulk of the burden. This pressure will drive up demand for soybean oil, corn oil, animal fats, and used cooking oil, potentially tightening the broader fats‑and‑oils market and influencing commodity prices.

Policy uncertainty adds another layer of risk. If future regulations continue to limit imported renewable diesel, producers will need to push plants beyond their historical operating envelopes, raising questions about reliability, maintenance costs, and environmental compliance. Conversely, a policy shift that eases import restrictions could alleviate domestic capacity strain but may shift competitive dynamics toward foreign suppliers. Stakeholders—from refiners to agribusinesses—must monitor EPA guidance, credit structures, and feedstock availability closely, as the ability to meet the Set 2 RVOs will shape the trajectory of the U.S. renewable fuels industry for years to come.