What Is a Carbon Tariff and Why Is the EU Imposing One?

The European Union has been an early adopter of carbon policies, with the introduction of the EU Emissions Trading System (ETS) in 2005. This scheme sets a common price for carbon and is applied to the most polluting manufacturing sectors. By increasing the cost of emissions-intensive production, the system incentivizes firms to decrease their use of fossil fuels. However, as we show in a companion post, the policy’s impact was moderated by firms increasing their reliance on high-emissions imports. To eliminate this workaround, the EU will expand the ETS to imports in 2026, through the Carbon Border Adjustment Mechanism (CBAM). The CBAM will essentially put a tariff on imported goods based on their carbon content. Our recent work provides a quantitative analysis of how the ETS and CBAM affect firms’ supply choice decisions, and the resulting changes in domestic prices and emissions.