US Democrats Revive Carbon Border Tax Plan to Cut Emissions and Shield Clean Manufacturing

Democratic lawmakers in the United States have reintroduced the Clean Competition Act (CCA), a proposal that would establish a US carbon border adjustment aimed at strengthening domestic manufacturing while reducing greenhouse gas emissions from some of the world’s most carbon-intensive industries.

Reintroduced by Senator Sheldon Whitehouse and Representative Suzan DelBene, the bill would impose a carbon intensity charge on both imported and domestically produced goods from high-emitting sectors, including steel, aluminum, cement, fertilizers, hydrogen, petrochemicals, refined fuels, glass, pulp and paper, and ethanol. Coverage would expand to more complex downstream products beginning in 2028.

Supporters argue the measure is designed to level the playing field for US manufacturers, who they say already operate with far lower emissions than many global competitors. Whitehouse warned that as regions such as the European Union move ahead with carbon border measures, US exporters could face foreign carbon fees without comparable protections at home. EU rules take effect in 2026, with similar mechanisms under consideration in the UK and Australia.

Under the proposal, the US would set an industrial performance benchmark based on the average carbon intensity of each covered domestic industry. Companies - both foreign and domestic - that exceed the benchmark would pay a charge on excess emissions. The levy would start at $60 per metric ton of CO₂ equivalent and rise annually by 6% above inflation, while benchmarks would tighten progressively through 2031.

Revenues would be directed toward industrial decarbonization, with 75% reinvested domestically through the Department of Energy to support clean manufacturing and 25% channeled internationally via the State Department. The bill pre-allocates $100 billion to accelerate emissions reductions. Least-developed countries would generally be exempt, and exporters would be eligible for rebates.

The legislation also allows the US to form “carbon clubs” with countries that adopt similar climate standards, reducing border charges and encouraging coordinated decarbonization. While its passage remains uncertain, the proposal reflects growing momentum among advanced economies to curb carbon leakage while protecting clean industry - a shift with significant implications for major trading partners such as Mexico.

A US carbon border tax would fundamentally reshape global CBAM-adjacent supply-chain competitive dynamics, and it changes what US manufacturers should plan for as embedded-emissions verification becomes mainstream. Our supply-chain-and-operations and market-intelligence teams help clients evaluate what CBAM-style US policy would mean for sourcing and disclosure.