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Viewpoint: US policy shift elevates domestic feedstocks

  • Spanish Market: Agriculture, Biofuels
  • 02/01/26

US biofuel producers may increasingly turn to domestic feedstocks as restrictive biofuel and trade policies limit the use of foreign materials.

The clean fuel production tax credit, known as 45Z, launched in 2025 to replace the $1/USG blender's tax credit. Under 45Z, foreign used cooking oil (UCO) became ineligible for credits, while foreign tallow retained access until tariffs introduced in the third quarter disrupted trade. Starting in 2026, 45Z will apply exclusively to biofuels made from North American feedstocks, effectively excluding all other foreign products.

President Donald Trump's administration's push to curb imports aims to strengthen domestic feedstocks, particularly soybean oil, in US biofuel production. US soybean crush capacity has grown by 13pc since 2022, reaching 2.97bn bushels (bu)/yr with the addition of 10 new crush plants. Expanded capacity drove a record 227.6mn bu of soybean crush in October, with multiple monthly records set throughout 2025.

The US biodiesel sector continues to rely on soybean oil as its primary feedstock, with soybean oil accounting for roughly 70pc of the biodiesel feedstock mix in 2024. Meanwhile, the renewable diesel (RD) and sustainable aviation fuel (SAF) industries have increasingly targeted lower-carbon feedstocks to maximize credit value, resulting in soybean oil demand failing to meet the demand expectations of crushers.

Agricultural lobbyists have long blamed foreign feedstocks for displacing domestic crop-based materials and have consistently pushed for restrictions. Heavy imports since early 2023 sidelined domestic supply, with Chinese UCO flooding the market and Brazilian and Australian tallow following suit. This surge drove record-high UCO consumption in July 2024, while tallow hit its own record in July 2025.

Feedstock imports slowed in the second half of 2025 with new 45Z rules and import tariffs. Chinese UCO shipments in January-October 2025 fell by 65pc from a year earlier, while Brazilian tallow volumes plunged below 22mn lbs in the fourth quarter after 50pc tariffs were imposed in August, down from a record 154mn lbs in June. Australian tallow maintained strong flows until October despite 10pc tariffs, but volumes were expected to decline in late 2025 and beyond as 45Z restrictions take effect.

In June, the Environmental Protection Agency (EPA) proposed record-high blending requirements for 2026 and 2027, alongside a measure to halve Renewable Identification Number (RIN) credit generation for fuels made abroad or from foreign feedstocks. This proposal sparked a rally in domestic feedstock prices, with most categories hitting yearly highs in July.

Agricultural lobbyists and waste-based feedstock suppliers support these RIN changes, viewing them as a boost for domestic feedstock demand. But optimism for domestic feedstocks is tempered by uncertainty surrounding the 45Z credit and delays in biofuel mandates, which are expected to extend into 2026.

The Trump administration confirmed in December that mandates would not be finalized before year-end, leaving market players without guidance about final mandatory volumes and potential import RIN credit cuts. Also in December, the US Department of the Treasury submitted a new 45Z proposal to the White House, as market participants seek updated guidance on filing tax credit claims for 2025, though officials will likely permit the use of existing guidance for 2025 claims.

This lack of clarity has triggered production cuts across multiple RD plants nationwide. Biofuel refiners such as Phillips 66 and Diamond Green Diesel have publicly announced rate reductions as renewable diesel margins dipped below 2024 levels. Some refiners continued tapping foreign feedstocks until December, avoiding some tariffs by claiming duty drawbacks and exporting the finished fuel abroad. Others remain cautious, as the half-RIN provision, if finalized, poses a significant risk to margins.

Looking ahead, existing tariffs, new 45Z policies, record-high biofuel mandates, and the half-RIN provision are expected to support soybean oil demand in first-quarter 2026 as producers seek to maximize credits through domestic feedstock use. US soybean oil futures closed at 49.44¢/lb on 30 December, down by 14pc from their July peak of 57.54¢/lb, making soybean oil more attractive compared to waste-based feedstocks.

Agriculture groups claim that expanded crush capacity and record production will provide sufficient soybean oil to meet biofuel demand, reducing reliance on imported feedstocks. In addition, the 45Z credit premium for soybean oil is expected to rise in 2026 as regulators stop considering potential land-use impacts of crop-based fuels, narrowing the gap with credit values for waste-based feedstocks. Soybean oil is also positioned to gain a competitive advantage over canola oil, which receives a roughly 50pc lower credit value.


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