Deep dive: Carbon border adjustment mechanism (CBAM) implementation — the fastest-moving subsegments to watch

The European Union's Carbon Border Adjustment Mechanism (CBAM) entered its definitive phase on January 1, 2026, and the financial impact is already measurable: an estimated EUR 1.4 billion in CBAM certificates were purchased in the first quarter alone, covering 93.7 million tonnes of embedded CO2 from imported goods across cement, iron and steel, aluminium, fertilizers, electricity, and hydrogen (European Commission, 2026). For procurement teams across Asia-Pacific, where roughly 38% of CBAM-exposed exports originate, the regulatory shift is no longer a future risk but a present cost line item that demands operational response.

Why It Matters

CBAM is the world's first large-scale carbon border tariff. It requires importers of designated goods into the EU to purchase CBAM certificates corresponding to the embedded carbon emissions in those products, priced at the weekly average of EU Emissions Trading System (EU ETS) allowances. As of February 2026, EU ETS prices averaged EUR 72 per tonne, meaning a tonne of imported steel with 1.8 tonnes of embedded CO2 carries an additional EUR 130 in carbon costs at the border.

For Asia-Pacific exporters, the stakes are enormous. The World Bank estimates that CBAM-exposed exports from China, India, Turkey, South Korea, and Southeast Asia collectively exceed EUR 45 billion annually (World Bank, 2025). India alone exports approximately EUR 8.2 billion in CBAM-covered goods to the EU, with iron, steel, and aluminium accounting for 76% of the exposure. South Korean steel producers face estimated annual CBAM liabilities of EUR 1.1 billion based on current production profiles and emission intensities (Korea International Trade Association, 2025).

The mechanism also has cascading effects beyond direct trade. Countries including the United Kingdom, Canada, and Australia have announced or are actively developing their own carbon border adjustment mechanisms, modeled in part on the EU's approach. Japan's Ministry of Economy, Trade and Industry published a CBAM feasibility study in late 2025 that recommended adoption by 2028 (METI, 2025). This means procurement teams that develop CBAM compliance capabilities now will be positioned for a broadening global regulatory landscape.

Key Concepts

Embedded emissions reporting: CBAM requires importers to report actual embedded emissions for each shipment, including both direct emissions from production and indirect emissions from electricity consumed during manufacturing. During the transitional period (October 2023 to December 2025), default values published by the European Commission were acceptable. From 2026, importers must use actual verified emissions data or face penalties calculated at the highest emission intensity for the product category in the EU. For Asian exporters, this shift from default to actual reporting is the single largest compliance challenge.

CBAM certificate pricing: Certificates are purchased weekly at prices linked to the EU ETS closing price. Unlike ETS allowances, CBAM certificates cannot be traded on secondary markets, eliminating speculative hedging opportunities. Importers must surrender certificates quarterly, with a final annual reconciliation by May 31 each year. Any shortfall triggers penalties of EUR 100 per tonne of unreported or uncovered emissions, in addition to the certificate cost.

Third-country carbon price deduction: Exporters who have already paid a carbon price in their home country can claim a deduction against CBAM liabilities. This provision is driving rapid policy development across Asia-Pacific. South Korea's K-ETS, China's national ETS, and India's proposed Carbon Credit Trading Scheme all provide potential deduction pathways, though the verification requirements and documentation standards remain complex.

Scope expansion timeline: The European Commission is scheduled to review CBAM scope in 2027, with organic chemicals, polymers, and potentially processed goods (such as automotive components) under consideration for inclusion by 2030. This prospective expansion means current compliance investments in data infrastructure and verification processes will serve broader requirements in the near future.

What's Working

Verified emissions data platforms are scaling fast

The most rapidly growing CBAM subsegment is the digital infrastructure for emissions data collection, verification, and reporting. Companies that built carbon accounting platforms for voluntary reporting have pivoted to CBAM compliance, creating integrated workflows that connect production-level emissions monitoring with EU customs documentation.

Siemens deployed its SiGreen platform across 14 steel and aluminium suppliers in India and Vietnam during 2025, enabling real-time tracking of embedded emissions at the production batch level. The platform uses product carbon footprint data from manufacturing execution systems and connects directly to EU CBAM reporting templates. Siemens reported that suppliers using SiGreen reduced their average reported emission intensity by 12% within six months, not through actual decarbonization but through more accurate measurement that replaced conservative default values with verified actuals (Siemens, 2025). For procurement teams, this demonstrates that investment in measurement infrastructure delivers immediate cost savings by avoiding the penalty of default values.

Sphera, a sustainability software provider, launched a dedicated CBAM module in mid-2025 that processed over 4,200 CBAM declarations across 380 importing entities by year-end. The platform automates the calculation of embedded emissions using both actual and default methodologies, generates the required CBAM declaration format, and manages certificate purchase timing to optimize cash flow. Sphera's data shows that importers using automated platforms complete declarations 67% faster than those relying on manual processes and experience 89% fewer errors requiring regulatory correction (Sphera, 2026).

Asian exporters are decarbonizing to preserve market access

CBAM is functioning as intended as a decarbonization incentive for trade-exposed industries. Tata Steel, India's largest steel producer and a major EU exporter, announced a EUR 3 billion investment program in 2025 specifically targeting emission intensity reduction at its Jamshedpur and Kalinganagar facilities. The program includes electric arc furnace capacity expansion, green hydrogen injection into blast furnaces, and carbon capture pilot installations. Tata Steel's stated goal is to reduce its CBAM-relevant emission intensity from 2.1 tonnes CO2 per tonne of crude steel to 1.4 tonnes by 2028, which would reduce its annual CBAM liability by approximately EUR 280 million at current ETS prices (Tata Steel, 2025).

In South Korea, POSCO committed USD 4 billion to its HyREX hydrogen-based ironmaking technology, with a 2 million tonne per year demonstration plant scheduled for 2028. POSCO explicitly cited CBAM as a driver of the investment timeline, noting that each 0.1 tonne reduction in CO2 intensity per tonne of steel saves approximately EUR 7.20 per tonne in CBAM costs across its 3.8 million tonne annual EU export volume (POSCO, 2025).

Third-country carbon pricing is accelerating

CBAM's carbon price deduction provision is catalyzing domestic carbon pricing adoption across Asia-Pacific. Indonesia launched its carbon tax on coal-fired power plants in April 2025, partly to establish a deductible carbon price for its aluminium and cement exporters. Vietnam's Ministry of Natural Resources and Environment accelerated its national ETS pilot timeline from 2028 to 2026, citing CBAM compliance as the primary driver. Thailand's Greenhouse Gas Management Organisation published draft ETS regulations in September 2025 with explicit provisions for EU CBAM deduction eligibility.

The practical impact is measurable: Indonesian aluminium producers who can document payment of Indonesia's carbon tax at IDR 30,000 per tonne (approximately EUR 1.70) receive a proportional deduction against their CBAM certificate obligations, though the deduction is modest relative to EU ETS prices of EUR 72 per tonne.

What's Not Working

Data collection from complex supply chains remains fragmented

While large primary producers can measure and report direct emissions with reasonable accuracy, embedded emissions reporting becomes exponentially more difficult as supply chains lengthen. A finished aluminium product exported to the EU may involve bauxite mining in Australia, alumina refining in Indonesia, smelting in China, and fabrication in Vietnam, each stage contributing embedded emissions that must be tracked and verified. The European Commission's own impact assessment acknowledged that "data availability for indirect emissions and upstream production stages remains the most significant implementation challenge" (European Commission, 2025).

In practice, many small and medium-sized enterprises (SMEs) in CBAM-exposed supply chains lack the technical capacity to measure and report emissions to the required standard. A survey by the Federation of Indian Export Organisations found that 73% of SME exporters in the iron and steel sector were unable to provide installation-level emissions data as of December 2025, relying instead on default values that inflate their reported carbon intensity by 20 to 40% compared to actual emissions (FIEO, 2025).

Verification infrastructure is bottlenecked

CBAM requires that emissions data from non-EU installations be verified by accredited third-party verifiers operating under EU-recognized standards. The supply of qualified verifiers in Asia-Pacific falls far short of demand. As of early 2026, fewer than 60 verification bodies across all of Asia had received EU accreditation for CBAM verification purposes. In India alone, where over 2,300 installations produce CBAM-covered goods for EU export, the verification bottleneck is creating delays of 3 to 6 months, pushing some exporters past quarterly filing deadlines and triggering penalty assessments.

Product scope uncertainty creates planning paralysis

The scheduled 2027 scope review has created uncertainty that is slowing investment decisions. Manufacturers of downstream products, such as automotive components, machinery, and construction materials, do not yet know whether their products will be subject to CBAM obligations. This uncertainty affects procurement strategy for Asia-Pacific sourcing teams who must decide whether to invest in CBAM-compliant supply chain infrastructure for product categories that may or may not fall within scope. Industry associations including BusinessEurope and the European Automobile Manufacturers' Association have called for early clarity on scope expansion timelines to enable investment planning.

Key Players

Established Companies

• European Commission DG TAXUD: the regulatory authority administering CBAM certificate issuance, compliance, and enforcement across all EU member states
• Siemens: industrial technology provider whose SiGreen platform enables production-level embedded emissions tracking for CBAM compliance across manufacturing supply chains
• Sphera: sustainability software company offering an integrated CBAM declaration management platform with automated emissions calculation and certificate tracking
• Bureau Veritas: global verification and testing group providing CBAM-accredited third-party emissions verification services for non-EU installations

Startups

• Carbmee: German climate tech startup offering an Environmental Intelligence System that maps CBAM exposure across procurement portfolios and identifies decarbonization levers
• CarbonChain: London-based startup providing automated embedded emissions calculations for traded commodities including metals, chemicals, and fuels entering EU markets
• Emitwise: supply chain emissions platform that connects supplier-level production data to CBAM reporting requirements with machine learning gap-filling for missing data points

Investors

• Breakthrough Energy Ventures: climate technology fund backing multiple CBAM compliance technology startups including carbon accounting and verification platforms
• EQT: European private equity firm investing in industrial decarbonization projects driven by CBAM-related cost pressures on trade-exposed manufacturers
• Temasek: Singapore sovereign wealth fund with investments in carbon market infrastructure and Asian industrial decarbonization aligned with CBAM incentives

Action Checklist

• Map your complete CBAM-exposed import portfolio by product category, country of origin, and estimated emission intensity to quantify annual certificate cost exposure
• Require actual verified emissions data from Tier 1 suppliers in CBAM-covered categories, replacing default values to reduce certificate costs by 20 to 40%
• Evaluate and deploy a CBAM declaration management platform to automate emissions calculations, certificate purchasing, and quarterly filing
• Identify suppliers who have paid carbon prices in their home jurisdictions and document these payments for third-country deduction claims
• Engage with suppliers on decarbonization roadmaps that include specific emission intensity reduction targets and timelines aligned with CBAM cost reduction
• Monitor the 2027 scope review process and conduct scenario analysis for potential expansion to organic chemicals, polymers, and downstream manufactured goods
• Establish verification partnerships with EU-accredited bodies in supplier countries to avoid filing delays from the current verification bottleneck

FAQ

Q: How does CBAM certificate pricing compare to EU ETS allowance pricing? A: CBAM certificates are priced at the weekly average closing price of EU ETS allowances on the European Energy Exchange. As of early 2026, this averaged EUR 72 per tonne of CO2. Unlike ETS allowances, CBAM certificates cannot be banked, traded, or hedged on secondary markets. Importers must purchase certificates directly from the CBAM authority and surrender them quarterly. This means procurement teams cannot use financial instruments to lock in future CBAM costs and must instead focus on reducing embedded emissions in their supply chains to structurally lower certificate requirements.

Q: What happens if an exporter cannot provide actual emissions data? A: If actual verified emissions data is not available, the EU applies default values based on the average emission intensity of the 10% worst-performing installations in the EU for that product category. In practice, these default values are 20 to 40% higher than actual emissions for most Asian producers, meaning reliance on defaults creates a significant cost penalty. For cement, the default value is 0.766 tonnes CO2 per tonne of clinker, while actual Asian production averages closer to 0.62 tonnes. For steel, defaults can add EUR 25 to EUR 50 per tonne in unnecessary CBAM costs compared to verified actuals.

Q: Can carbon prices paid in exporting countries be deducted from CBAM obligations? A: Yes. Importers can claim deductions for carbon prices effectively paid in the country of production, including carbon taxes, ETS costs, and equivalent instruments. The deduction is calculated per tonne of CO2 covered, converted to euros at prevailing exchange rates. However, the process requires documented proof of payment, product-level allocation of carbon costs, and verification that the carbon price was not rebated or offset through subsidies. In practice, claiming deductions from emerging carbon pricing systems in countries like China and Indonesia involves significant administrative complexity and documentation requirements.

Q: Which Asia-Pacific countries face the largest CBAM exposure? A: China faces the largest absolute exposure due to its dominant share of EU imports in steel, aluminium, and fertilizers, with estimated annual CBAM liabilities exceeding EUR 3 billion. India ranks second at approximately EUR 1.5 billion, driven by iron and steel exports. South Korea, Turkey, and Russia (despite sanctions-related trade disruptions) round out the top five. On a per-capita export basis, countries with high-carbon-intensity production and large EU trade relationships face the most acute pressure, particularly where domestic carbon pricing is absent or set at levels far below EU ETS prices.

Sources

• European Commission. (2026). CBAM Implementation Report: First Quarter 2026 Certificate Sales and Compliance Data. Brussels: DG TAXUD.
• World Bank. (2025). State and Trends of Carbon Pricing 2025: Carbon Border Adjustments and Trade Implications. Washington, DC: World Bank Group.
• Korea International Trade Association. (2025). Impact Assessment of EU CBAM on Korean Steel and Aluminium Exports. Seoul: KITA.
• Ministry of Economy, Trade and Industry, Japan. (2025). Feasibility Study on Carbon Border Adjustment Measures for Japan. Tokyo: METI.
• Tata Steel. (2025). Sustainability and Climate Action Report 2025: Decarbonization Investment Program. Mumbai: Tata Steel Limited.
• POSCO. (2025). Carbon Neutrality Roadmap 2030: HyREX Technology and CBAM Cost Impact Analysis. Pohang: POSCO Holdings.
• Siemens. (2025). SiGreen Platform Deployment Report: CBAM Compliance Across Asian Supply Chains. Munich: Siemens AG.
• Sphera. (2026). CBAM Declaration Management: Platform Performance and Compliance Outcomes. Chicago: Sphera Solutions.
• Federation of Indian Export Organisations. (2025). CBAM Readiness Survey: Indian SME Exporters in Iron, Steel, and Aluminium. New Delhi: FIEO.
• European Commission. (2025). CBAM Regulation Implementation Review: Data Availability and Verification Challenges. Brussels: European Commission.