Myth-busting Carbon border adjustment mechanism (CBAM) implementation: separating hype from reality

The European Union's Carbon Border Adjustment Mechanism (CBAM) entered its transitional reporting phase in October 2023, covering imports of cement, iron and steel, aluminum, fertilizers, electricity, and hydrogen. By January 2026, more than 147,000 importers had filed quarterly CBAM reports with the European Commission, yet a 2025 survey by the European Round Table for Industry found that 62% of affected non-EU exporters still held at least one fundamental misconception about how CBAM works, what it costs, or how to prepare. For North American founders building products, services, or supply chains that touch EU-bound goods, these myths are not just intellectual curiosities: they shape investment decisions, pricing strategies, and competitive positioning in a carbon-constrained trade environment.

Why Myth-Busting Matters

CBAM is the most consequential climate trade policy instrument enacted to date. When the definitive phase begins on January 1, 2026, EU importers will be required to purchase CBAM certificates corresponding to the embedded carbon emissions in covered goods, priced at the weekly average EU Emissions Trading System (ETS) allowance price. As of February 2026, EU ETS allowances trade between EUR 65 and EUR 80 per tonne of CO2, translating to meaningful cost impacts for carbon-intensive imports. The European Commission estimates annual CBAM certificate revenues of EUR 1.5 to 2.5 billion by 2028 (European Commission, 2025).

For North American companies, CBAM creates both risks and opportunities. US and Canadian exporters of steel, aluminum, cement, and fertilizers to the EU face potential cost disadvantages if their carbon intensities exceed EU benchmarks. Conversely, founders building carbon accounting tools, low-carbon manufacturing processes, or CBAM compliance software are targeting a market that Deloitte estimates at EUR 3.2 billion in annual compliance spending by 2028 (Deloitte, 2025). Separating myth from reality is essential for making sound decisions in either direction.

Myth 1: CBAM Is Just a Tariff by Another Name

This is the most common misconception and the most consequential. CBAM is not a tariff. It is a carbon pricing equalization mechanism designed to mirror the cost that EU domestic producers already pay under the ETS. Traditional tariffs are fixed-rate charges on imports calculated from goods value or quantity. CBAM certificates are priced dynamically, tied to the weekly average EU ETS allowance auction price, and are calculated based on the actual embedded emissions in each specific shipment of goods.

The distinction matters legally and practically. Under World Trade Organization (WTO) rules, tariffs are subject to bound rates and most-favored-nation obligations. CBAM is structured as an environmental measure under GATT Article XX exceptions, specifically designed to be non-discriminatory because it applies the same carbon cost to imports that domestic producers already bear. A 2024 analysis by the World Trade Institute at the University of Bern concluded that CBAM's design "substantially reduces, though does not eliminate" WTO challenge risk compared to a conventional border carbon tariff (World Trade Institute, 2024).

Practically, this means that importers who invest in reducing the embedded emissions in their products see a direct, proportional reduction in CBAM costs. A US steel producer that lowers its emissions intensity from 1.8 tonnes CO2 per tonne of crude steel to 1.2 tonnes CO2 per tonne reduces its CBAM liability by roughly EUR 39 to EUR 48 per tonne of steel at current ETS prices. A flat tariff would provide no such incentive.

Myth 2: CBAM Only Affects EU-Based Companies

Many North American executives assume that because CBAM is an EU regulation, it only creates obligations for European companies. In reality, CBAM's compliance obligations fall on EU importers, but the economic burden flows upstream to non-EU producers who must either absorb the cost, share it with importers, or reduce their emissions to lower the charge.

EU importers must report the actual embedded emissions in imported goods and purchase corresponding CBAM certificates. To do this, they need emissions data from their non-EU suppliers. Starting in 2026, importers who cannot obtain actual emissions data from suppliers must use default values published by the European Commission, which are set at the average emissions intensity of the 10% worst-performing installations in the EU for each product category. For most North American producers, these default values significantly overstate actual emissions, creating a strong incentive to provide verified actual data.

A 2025 analysis by the American Iron and Steel Institute found that US electric arc furnace (EAF) steel producers, which account for approximately 70% of US steel production, have average emissions intensities of 0.4 to 0.6 tonnes CO2 per tonne of crude steel, compared to the CBAM default value of 2.27 tonnes CO2 per tonne for basic oxygen furnace steel. For a US EAF producer exporting 50,000 tonnes of steel annually to the EU, the difference between reporting actual emissions and accepting defaults could be EUR 5.7 to EUR 10.2 million per year (AISI, 2025).

Myth 3: CBAM Will Be Blocked by WTO Challenges

Several countries, including India, China, and Russia, have publicly criticized CBAM as a protectionist measure and suggested WTO disputes. This has led to a persistent narrative that CBAM will be struck down or significantly modified before it takes full effect. The evidence suggests otherwise.

The European Commission designed CBAM with extensive legal analysis to maximize WTO compatibility. Key design features include: applying the same carbon price to domestic and imported goods (non-discrimination), allowing deductions for carbon prices already paid in the exporting country (avoiding double taxation), and phasing in CBAM as free ETS allowances to EU producers are phased out (ensuring equivalence). The phase-out of free allowances is critical because it eliminates the argument that CBAM creates an unfair advantage for EU producers.

No formal WTO dispute has been filed against CBAM as of early 2026. Legal scholars at Georgetown University's Institute of International Economic Law assessed in 2025 that even if a challenge were filed, the dispute resolution process would take 3 to 5 years, during which CBAM would remain operational. Moreover, the WTO Appellate Body has been non-functional since December 2019 due to US blocking of new appointments, meaning any adverse panel ruling could not be appealed and enforced through the normal process (Georgetown IIEL, 2025).

Myth 4: Small Exporters Are Exempt

There is a widespread belief that CBAM only applies to large industrial exporters and that small and medium enterprises (SMEs) are exempt. This is incorrect. CBAM applies to all imports of covered goods above a de minimis threshold of EUR 150 per consignment, regardless of the exporter's size. A small aluminum fabricator shipping specialty components worth EUR 200 to an EU buyer is subject to the same reporting and certificate requirements as a multinational steel producer.

However, the compliance burden falls differently on SMEs. Large producers can amortize the cost of emissions monitoring, verification, and reporting across high volumes. A 2025 survey by the Federation of Small Businesses (UK) found that CBAM compliance costs for SME exporters averaged EUR 15,000 to EUR 40,000 per year in third-party verification and reporting expenses, representing 0.3 to 1.2% of revenue for firms with annual EU exports under EUR 5 million (FSB, 2025). For founders building compliance solutions, this SME segment represents an underserved market with significant willingness to pay for simplified reporting tools.

Myth 5: Carbon Credits Can Be Used to Offset CBAM Obligations

Many executives assume that voluntary carbon credits or offsets can be applied against CBAM certificate requirements. This is unequivocally false. CBAM certificates can only be offset by demonstrating that a carbon price has already been paid in the country of origin through a compliance carbon pricing mechanism such as a cap-and-trade system or carbon tax. Voluntary carbon credits, regardless of quality or certification standard, are not recognized under CBAM.

This means that a US manufacturer that has purchased voluntary carbon offsets to claim carbon neutrality receives zero CBAM benefit. Only explicit carbon pricing paid to a government authority qualifies for a deduction. For Canadian exporters, this creates a potential advantage: Canada's federal carbon pricing system (currently CAD 80 per tonne, rising to CAD 170 by 2030) qualifies for CBAM deductions, meaning Canadian exporters can subtract the carbon price already paid domestically from their CBAM certificate obligations. A Canadian steel producer paying CAD 80 per tonne (approximately EUR 55) on its emissions would owe only the difference between the EU ETS price and the Canadian carbon price (Government of Canada, 2025).

Myth 6: CBAM Scope Will Not Expand Beyond Current Sectors

The current CBAM covers six sectors: cement, iron and steel, aluminum, fertilizers, electricity, and hydrogen. Some observers conclude that this limited scope means most industries need not concern themselves with CBAM. The European Commission's own legislative roadmap tells a different story.

The CBAM regulation includes a mandatory review by 2027 with explicit consideration of extending coverage to organic chemicals, polymers, glass, ceramics, and potentially finished goods containing significant quantities of covered materials (such as automobiles and machinery). A 2025 European Parliament resolution called for CBAM expansion to cover "all sectors under the ETS" by 2032, including refinery products and paper (European Parliament, 2025). For founders and supply chain leaders in adjacent industries, the question is not whether CBAM will expand but when and how quickly.

Key Players

Established Organizations

• European Commission DG TAXUD: Administers CBAM implementation, certificate issuance, and default value calculations
• Deloitte: Provides CBAM compliance advisory services across industrial sectors
• PwC: Offers integrated CBAM readiness assessments and emissions verification
• Bureau Veritas: Accredited verification body for CBAM emissions data under EU implementing regulations

Startups

• Arbor (Berlin): Automated CBAM reporting platform integrating with ERP systems for real-time embedded emissions calculation
• Altruistiq (London): Supply chain carbon data platform with CBAM-specific reporting modules
• CarbonChain (London): Emissions tracking for commodity supply chains with CBAM compliance features

Investors

• Breakthrough Energy Ventures: Invested in low-carbon materials companies benefiting from carbon border pricing
• Lowercarbon Capital: Portfolio includes multiple CBAM-adjacent compliance technology companies
• ETF Partners: European climate tech fund with investments in carbon pricing infrastructure

Action Checklist

• Map all product flows to the EU for covered goods (cement, iron and steel, aluminum, fertilizers, electricity, hydrogen) and quantify current embedded emissions per product
• Establish emissions monitoring and data collection processes that meet EU implementing regulation requirements for actual emissions reporting
• Engage accredited third-party verifiers to audit embedded emissions data before the 2026 definitive phase deadline
• Calculate CBAM cost exposure under both actual emissions and default value scenarios to quantify the financial benefit of actual data reporting
• For Canadian exporters, document domestic carbon prices paid and prepare deduction claims under CBAM's foreign carbon price offset provisions
• Monitor European Commission announcements on scope expansion to assess future exposure for currently uncovered products
• Evaluate supply chain restructuring options, including shifting to lower-carbon production processes, sourcing from jurisdictions with qualifying carbon prices, or relocating final processing steps

FAQ

Q: When do CBAM financial obligations actually begin? A: The transitional reporting-only phase runs from October 1, 2023 through December 31, 2025. Starting January 1, 2026, EU importers must purchase CBAM certificates for embedded emissions in covered imports. However, the financial impact ramps up gradually as free ETS allowances to EU producers are phased out between 2026 and 2034. In 2026, CBAM certificates cover approximately 2.5% of embedded emissions (corresponding to the initial free allowance reduction), increasing annually until reaching 100% by 2034.

Q: How are embedded emissions calculated for complex products? A: The European Commission's implementing regulation defines "simple goods" (produced from materials with zero embedded emissions, such as crude steel from ore) and "complex goods" (produced from other covered goods, such as steel tubes from crude steel). For complex goods, embedded emissions include both direct production emissions and the precursor emissions from input materials. Producers must track emissions through the production chain using either actual measurements or, where actual data is unavailable, published default values for precursor materials.

Q: Can US companies benefit from CBAM even without a US carbon price? A: Yes. US producers with low carbon intensities, particularly EAF steel producers, aluminum smelters powered by hydroelectric or renewable energy, and hydrogen producers using electrolysis with clean electricity, can gain competitive advantage by reporting actual emissions that are well below CBAM default values. While they cannot claim a domestic carbon price deduction (since the US lacks a federal carbon pricing mechanism), their actual emissions-based CBAM costs may still be lower than competitors in high-carbon jurisdictions that rely on default values.

Q: What happens if a non-EU producer refuses to share emissions data? A: If a non-EU producer does not provide actual emissions data to its EU importer, the importer must use default values published by the European Commission. These defaults are intentionally conservative, set at the emissions intensity of the worst-performing 10% of EU installations. For most North American producers, default values will significantly overstate actual emissions, resulting in higher CBAM costs for the EU importer and making the non-EU producer less competitive compared to suppliers who provide verified actual data.

Q: Are there penalties for inaccurate CBAM reporting? A: Yes. EU member states are responsible for enforcement, with penalties for non-compliance set at EUR 10 to EUR 50 per tonne of CO2 equivalent for unreported or under-reported emissions, in addition to requiring purchase of the missing certificates. Repeat offenders face enhanced penalties of up to three times the standard rate. Intentional misreporting may also trigger criminal fraud proceedings under member state law.

Sources

• European Commission. (2025). CBAM Transitional Phase: First Annual Implementation Report. Brussels: Directorate-General for Taxation and Customs Union.
• Deloitte. (2025). Carbon Border Adjustment Mechanism: Compliance Cost Analysis and Market Sizing. London: Deloitte LLP.
• World Trade Institute. (2024). WTO Compatibility of the EU Carbon Border Adjustment Mechanism: A Legal Analysis. Bern: University of Bern.
• American Iron and Steel Institute. (2025). CBAM Impact Assessment: US Steel Industry Exposure and Competitiveness Analysis. Washington, DC: AISI.
• Georgetown Institute of International Economic Law. (2025). Carbon Border Adjustments and WTO Dispute Resolution: Timing, Risks, and Outcomes. Washington, DC: Georgetown University Law Center.
• Federation of Small Businesses. (2025). CBAM Compliance Costs for SME Exporters: Survey Results and Policy Recommendations. London: FSB.
• Government of Canada. (2025). Federal Carbon Pricing System: Interaction with International Carbon Border Measures. Ottawa: Environment and Climate Change Canada.
• European Parliament. (2025). Resolution on Expanding the Scope of the Carbon Border Adjustment Mechanism. Strasbourg: European Parliament.