Understanding the EU's Carbon Tariff: The Shift to Carbon Border Adjustments

The European Union (EU) has long been at the forefront of climate policy, notably introducing the EU Emissions Trading System (ETS) in 2005. This initiative was designed to set a unified price for carbon emissions, targeting the most polluting industrial sectors. Its intention was clear: by raising costs associated with emissions-heavy production, it would motivate companies to reduce their dependence on fossil fuels. However, the impact of this system has been partially offset by firms increasingly importing high-emission products from outside the EU. To address this issue, the EU plans to implement the Carbon Border Adjustment Mechanism (CBAM) starting in 2026, effectively imposing a carbon tariff on imported goods according to their carbon content.

A Quantitative Approach to Understanding CBAM

The journey toward implementing the CBAM is bolstered by a quantitative analysis examining how the ETS and the proposed adjustment mechanism will influence supply chain decisions among firms, particularly in France. Research utilizing a detailed model examines firm behaviors when faced with regulated versus unregulated inputs. This framework allows for intricate simulations that mimic two key policy scenarios: one with a blanket carbon tax applicable to all inputs produced by regulated sectors within the ETS and another combining the ETS with the CBAM, which also taxes imports outside the EU’s regulatory framework.

Finding Sourcing Potentials

Estimations within the model provide insight into sourcing decisions that French firms make based on comparative advantages. For instance, data from 2004, prior to ETS, illustrates that non-ETS nations, such as Russia and Australia, hold significant advantages in supplying petroleum and high-emissions raw materials. This information assists in understanding how various countries factor into firms’ sourcing strategies and illustrates France’s growing reliance on imports as a workaround to avoid the costs imposed by carbon controls.

Policy Scenario Analysis: The Impact on Prices and Emissions

The model also explores what happens under different regulatory conditions. For example, in a scenario that applies only the ETS with a carbon tax equivalent to its market price, global carbon emissions are projected to decrease by 0.7 million tons. This reduction, however, comes at the expense of a limited rise in French manufacturing prices, approximately 0.87 percent. Such limited effectiveness can largely be attributed to what researchers term "carbon leakage," where French firms increase their imports from higher-emission-producing countries.

In contrast, when the model incorporates the CBAM, the expected global emission reduction jumps to seven times that of the ETS-only scenario. This significant enhancement occurs alongside a rise in manufacturing costs of about 1.42 percent. The CBAM effectively eliminates the incentives for firms to import emissions-regulated goods by shifting their sourcing towards less polluting countries, including France itself. The projected outcomes indicate that while emissions are substantially reduced, the consumer price burden corresponding to higher input costs is also significant.

Implications of Enhanced Carbon Policies

The transition to CBAM signifies an evolution in the EU's approach to carbon policy. By integrating this mechanism, the EU not only makes strides toward its climate goals but also shapes the competitive landscape within which firms operate. While the potential for reduced emissions is considerable, there’s a dual implication: industries face increased operational costs due to higher prices for domestic goods. This price surge compounds challenges for households, as consumers will likely bear the brunt of these changes through elevated final product prices.

Ultimately, these developments highlight the multifaceted implications of carbon pricing strategies. While aiming to recalibrate emissions at a global level, firms have shown an acumen for adapting through various supply chain strategies, such as reshoring regulated inputs locally. These tactics can be beneficial in promoting investments in cleaner technologies but can simultaneously produce adverse effects on international competitiveness, resulting in a juxtaposition of emissions reductions and increased costs for domestic consumers.

Understanding the dynamics at play with the CBAM provides crucial insights for stakeholders, revealing the delicate balance between achieving environmental goals and maintaining economic viability. As the date for implementation draws nearer, ongoing assessments will be essential to gauge the real-world outcomes of such policies on both emissions and market conditions.

Pierre Coster is an economics Ph.D. student at the University of Southern California. Julian di Giovanni is an economic research advisor in the Federal Reserve Bank of New York’s Research and Statistics Group. Isabelle Mejean is a professor of economics at Sciences Po.