The US biofuels market is creating an unexpected opportunity across the Atlantic.
As D4 Renewable Identification Number (RIN) prices reach record highs, a new arbitrage has emerged that allows European biodiesel producers to capitalize on soaring US renewable fuel incentives while solving a separate challenge closer to home: Europe's growing need for livestock feed protein.
What appears to be a niche trading opportunity is, in reality, a glimpse into how policy, agricultural markets, and global biofuel supply chains are becoming increasingly interconnected.
According to a Prima CarbonZero analyst report, European biodiesel producers are settling in on a new dynamic:
Import EPA-certified US soybeans
Crush them locally
Retain the soymeal for Europe's livestock sector
Export the resulting biodiesel back to the United States
The economics are compelling.
With D4 RIN values at historic highs, exporting biodiesel into the US has become significantly more attractive than selling soybean-based biofuel within Europe. Market participants report that between 10,000 and 15,000 metric tons of European-produced biodiesel are already scheduled to ship in the coming weeks. Additional cargoes are reportedly booked for September and the fourth quarter as well.
This dynamic goes beyond opportunistic trading. It reflects widening imbalances between US renewable fuel demand and domestic production capacity.
Demand for biomass-based diesel in the United States has surged, but domestic production has struggled to keep pace.
US biodiesel plants operated at 79% capacity utilization in April. This was the highest level since 2024 and a significant increase from the 56% average seen throughout 2025.
Despite improving utilization rates, however, approximately one-fifth of US production capacity remains idle.
Much of that slowdown stems from the transition away from the blender's tax credit toward the new 45Z Clean Fuel Production Credit. Unlike its predecessor, the 45Z incentive functions as an income tax credit rather than a direct cash payment. This creates monetization challenges for producers without sufficient tax liability.
Until additional domestic capacity comes online, European producers have become an attractive tolling partner capable of helping satisfy US renewable fuel demand.
The trade works because both markets gain something they need.
Europe remains structurally short of protein for animal feed, making soybean meal a valuable domestic commodity. By crushing imported US soybeans locally, European processors can retain the meal while exporting the soybean oil as biodiesel to capture the premium available in the US market.
At the same time, soybean-based biodiesel has become increasingly difficult to place within Europe.
Crop-based biofuels continue to face tightening regulatory limits, and the European Commission is considering classifying soybeans as a high indirect land-use change (ILUC) feedstock. If adopted, soybean oil would no longer count toward European renewable transport targets. This holds true whether it is imported or domestically produced.
Such a decision would significantly reduce domestic demand for soybean oil while leaving Europe's protein requirements unchanged. The move makes export markets increasingly important for the oil fraction.
One major uncertainty remains, and it relates to 45Z.
The USDA is expected to provide additional guidance this summer on whether biodiesel produced outside the United States (but from US-grown soybeans) could qualify under aspects of the 45Z framework.
The outcome has implications well beyond current trading flows.
If future rules encourage greater use of foreign crushing while maintaining eligibility for US incentives, cross-border tolling arrangements could become a longer-term feature of the North American biofuels supply chain rather than a temporary response to tight market conditions.
Conversely, if eligibility remains narrowly defined around domestic production, current arbitrage opportunities may prove more limited.
Today's arbitrage is about more than attractive margins.
It illustrates how rapidly changing policy, renewable fuel incentives, feedstock availability, and infrastructure investment can reshape global commodity flows.
Whether this becomes a temporary market distortion or the beginning of a structural shift will depend on several evolving factors, including final 45Z guidance, European biofuel policy, US capacity expansion, and the trajectory of RIN markets.
For market participants across the biofuels value chain, understanding how these moving pieces interact will be essential for making informed commercial decisions in an increasingly interconnected global market.
The market dynamics shaping today's biofuels industry extend well beyond RIN prices. Policy changes, geopolitical events, feedstock markets, and evolving trade flows are creating new risks and opportunities for producers, traders, and investors alike.
To see these trends in greater depth, watch our on-demand webinar, Q2 2026 Biofuels Outlook: Iran War Implications, where we examine the market forces driving today's biofuels landscape, the impact of recent geopolitical developments, and what stakeholders should be watching in the months ahead.