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CBAM · Compliance Guide · Operational StepsHow the Carbon Border Adjustment Mechanism Works: An Operational Guide for Exporters
There is plenty of commentary about what the EU Carbon Border Adjustment Mechanism means at a macro level. There is far less written about what it actually requires you to do day to day: what data to collect, what to report, what certificates to buy, and when. For Indian exporters of steel, aluminium, and fertilisers, these operational details are now urgent priorities because the definitive phase began on 1 January 2026.
Key Takeaways
CBAM's definitive phase began on 1 January 2026. The full compliance pathway consists of six clear operational steps, ranging from product scope validation to annual certificate surrender.
The first surrender deadline for CBAM certificates is set for 30 September 2027, covering embedded emissions from goods imported during 2026. Official certificate sales open on 1 February 2027.
For 2026, certificate prices equal the quarterly average of EU ETS allowance auction prices. The European Commission published the first quarterly price on 7 April 2026 at €75.36 per metric ton of carbon equivalent.
The CBAM factor in 2026 is set at 2.5%, meaning importers pay for only 2.5% of embedded emissions above the benchmark this year because EU producers still receive 97.5% free allowances under the ETS. Free allocation phases out entirely by 2034, bringing the CBAM obligation to 100%.
Without verified facility-level emissions data, strict EU default values apply. These defaults use the highest observed emission intensity for the product category, maximizing landed carbon costs.
Independent third-party verification is mandatory from 2026. Verifiers must perform an on-site physical inspection of the manufacturing plant in the initial verification year.
Carbon prices paid in the origin country can be deducted from CBAM obligations, making the growth of India's Carbon Credit Trading Scheme directly valuable for domestic exporters.
The CBAM timeline: where things stand in 2026
Transitional phase: Exporters and importers completed quarterly reporting without financial payments or certificate purchases. This period allowed companies to establish monitoring infrastructure and audit product boundaries.
Definitive phase starts: Financial obligations are now live. EU importers bringing covered goods above the 50-tonne threshold must hold Authorised CBAM Declarant status. Importers who submitted applications before 31 March 2026 may provisionally continue importing while applications process.
First certificate price published: The European Commission released the first quarterly CBAM certificate price at €75.36 per metric ton of carbon equivalent, calculated using Q1 2026 EU ETS auction clearing averages.
Certificate sales open: EU importers can begin buying CBAM certificates from national authorities via the Common Central Platform. From Q1 2027, importers must hold at least 50% of the certificates needed for that quarter's imports.
First surrender deadline: Importers submit their annual CBAM declaration and surrender certificates for all embedded emissions from 2026 imports, marking the first real financial settlement.
Phased phase-in of levies: The CBAM coverage factor steps up each year as EU ETS free allowances decrease (2.5% in 2026, 5.0% in 2027, scaling to 100% by 2034). Postponing decarbonisation will result in steadily rising border levies.
Step 1: Confirm whether your products are covered
CBAM targets products in six key sectors: iron and steel, aluminium, cement, fertilisers, electricity, and hydrogen. However, coverage depends strictly on specific EU Combined Nomenclature (CN) codes rather than general industry categories. Not every item made by an industrial company is automatically subject to CBAM rules.
Many exporters miss this distinction. For example, flat-rolled steel products fall under CBAM, whereas specific downstream steel items such as screws, bolts, and specialized components were excluded from the initial list. The European Commission's December 2025 proposal recommended extending coverage to additional downstream goods made with steel and aluminium. While that extension is working through the legislative process, it confirms that the scope of CBAM will broaden over time.
The 50-tonne exemption rule: Under Regulation (EU) 2025/2083, importers bringing in less than 50 tonnes total per year of cement, iron, steel, aluminium, and fertilisers combined do not need to submit CBAM declarations. This exemption does not apply to electricity or hydrogen. While this rule relieves roughly 90% of smaller importers, it does not apply to industrial manufacturers exporting large volumes.
As a first operational step, Indian exporters with European customers should cross-check their catalog against the official CN code table published by the European Commission. EU buyers need these exact product codes to fulfill their compliance filings.
Step 2: Understand what emissions must be calculated
Once you identify covered goods, you must calculate embedded emissions. CBAM categorizes emissions into direct and indirect sources, requiring different metrics based on product type.
Emissions from the manufacturing process itself
Greenhouse gases emitted during physical production, such as burning metallurgical coal in a steel furnace, calcining limestone in cement kilns, or reforming natural gas into ammonia.
Mandatory for: Steel, aluminium, cement, fertilisers, and hydrogen.
Emissions from electricity consumed during production
Carbon emissions linked to the power grid or captive power plants running electricity for production equipment. Inclusion rules vary depending on the product group under CBAM standards.
Mandatory for: Aluminium smelting, specific fertilisers, and cement.
Aluminium requires tracking both direct process emissions and indirect electricity emissions, making power selection critical for total CBAM liabilities. An aluminium smelter running on coal power will record significantly higher embedded carbon than one using renewable energy, even if the smelting machinery is identical. Policies like Green Energy Open Access Rules and transmission fee waivers give Indian manufacturers a practical path to reduce indirect emissions and lower CBAM levies.
For steel, CBAM defaults to counting direct emissions. A simplification update in late 2025 revised the default methodology for grid power in specific categories, basing figures on the average national grid emission factor rather than fossil fuel defaults, which lowers penalties for countries expanding renewable capacity.
The EU mandates calculating embedded carbon using the methodology outlined in CBAM implementing acts rather than general corporate standards like the GHG Protocol or national inventory rules. Indian firms cannot simply reuse general ESG reports to meet CBAM demands.
Step 3: Choose between actual data and default values
Importers can calculate carbon obligations using either verified facility-level data from the exporter or default values provided by the European Commission. This choice directly impacts final costs.
EU default values use the highest emission intensity observed among exporting nations or conservative regional estimates. Primary facility data from Indian plants usually reflects lower carbon intensity than these penalizing default assumptions. Setting up facility-level measurement systems helps lower CBAM obligations and avoids paying maximum border adjustments.
Beginning in 2026, facility data must be verified by an accredited third-party auditor. In the initial verification year, the auditor must conduct an on-site physical inspection of the manufacturing plant. Setting up measurement practices and booking accredited verifiers takes time, so manufacturers should begin preparation early.
Step 4: Understand the cost calculation formula
Calculating final CBAM payments involves more than multiplying emissions by the carbon price. Two adjustment factors adjust the total certificate requirement.
The free allocation adjustment mirrors the protections given to domestic EU manufacturers. In 2026, importers pay levies on only 2.5% of emissions above benchmarks because EU plants still receive 97.5% free allowances. As these free allowances phase out through 2034, the CBAM factor increases toward 100%, applying full carbon costs to imports.
Step 5: The domestic carbon price offset
A key feature of CBAM for exporting nations is the option to credit carbon prices paid locally. If an exporter proves a verified carbon payment was made during manufacturing in the origin country, that cost can be deducted from the EU certificate requirement, preventing double carbon taxation.
For India, this connects directly to the Carbon Credit Trading Scheme (CCTS). While CCTS frameworks are active, sector targets, monitoring systems, and registries are still being finalized. If the European Commission recognizes CCTS payments as an equivalent carbon pricing system, Indian exporters can use local compliance payments to offset EU border levies, keeping revenue within India.
Research by CSEE and CCEW highlights that retaining carbon revenue domestically rather than sending it to European treasuries preserves capital for local industrial transition. The ongoing development of India's carbon market serves as a strategic tool for managing international trade terms.
The European Commission continues to refine operational rules for verifying foreign carbon payments. Until final frameworks are published, deductions require verified documentation showing payments were made under recognised local carbon compliance schemes.
Step 6: Verification and annual declaration
CBAM relies on verified reporting rather than self-declarations. Embedded carbon data submitted in annual filings must be audited by accredited verifiers operating under standards aligned with EU ETS guidelines. The verifier must complete an on-site facility check during the initial audit year and confirm that reported numbers stay within a 5% margin of error (tightening to 2% for high-volume facilities).
This auditing requirement requires early action from industrial exporters who have not previously maintained facility-level carbon records. Accredited verifiers with industrial auditing expertise have limited scheduling capacity. Establishing monitoring protocols and completing audits takes months of lead time.
While EU importers submit the final annual CBAM declaration, the filing depends on primary data generated by the exporter. Providing complete, auditable facility records allows importers to avoid penalizing default values and maintains strong commercial relationships.
What Indian exporters need to do in practice: right now
Map all export lines against the official EU CBAM CN code schedule. Do not rely on high-level industry categories. Importers need accurate product codes to register as Authorised CBAM Declarants.
Establish monitoring systems for direct and indirect emissions at the plant level using EU CBAM calculation methods. General corporate sustainability disclosures or national inventory numbers may not meet CBAM requirements without adjustment.
Schedule third-party verifiers well ahead of reporting deadlines to ensure mandatory on-site visits are completed without delaying exports or triggering default rates.
Follow updates on India's Carbon Credit Trading Scheme and European recognition of local carbon prices. Check updates from the Bureau of Energy Efficiency (BEE) regarding timeline details for specific sectors.
Calculate cost projections for 2026, 2028, 2030, and 2034 using varied ETS carbon price forecasts. These projections provide clear data for capital allocations toward clean energy and plant upgrades.
Create structured data-sharing agreements with European buyers outlining what carbon metrics will be delivered, in what format, and on what schedule to support their annual declarations smoothly.
The strategic perspective for exporters
Beyond policy discussions, CBAM operates as a practical data and compliance framework that scales up through 2034. Companies that establish strong tracking, auditing, and decarbonisation practices early can build a clear advantage in European supply chains.
Exporters operating below EU carbon benchmarks will face lower unit costs. Those providing verified primary data will avoid default rate markups, and companies paying recognised local carbon prices can reduce net border adjustments. Early preparation across these areas helps protect long-term competitiveness in covered markets.
For detailed sector analysis, explore our dedicated research pages for Steel, Aluminium, and Fertilisers. Further policy context is available in the Interactive Policy Map.
Frequently asked questions
Who holds legal responsibility for CBAM compliance, the exporter or importer?
The legal obligation to buy and surrender CBAM certificates rests with the EU importer or their authorized representative. However, importers rely entirely on primary emission data provided by the exporter. Without verified facility records, importers must apply conservative default values that increase landed costs.
What occurs if an EU importer uses default values instead of actual plant data?
EU default values use high emission estimates based on the top-emitting facilities in exporting nations. Applying defaults usually results in higher certificate costs for the importer, which can lead to requests for price discounts or changes in supplier selection.
When do financial payments for CBAM begin?
Financial obligations started accumulating on 1 January 2026 for all covered goods imported that year. Certificate purchasing platforms open on 1 February 2027, with the initial surrender deadline set for 30 September 2027. Tracking and verification processes for 2026 production must be established immediately.
What is the CBAM factor and how does it change over time?
The CBAM factor represents the percentage of embedded emissions subject to certificate surrenders. In 2026, the factor is set at 2.5% to match the remaining 97.5% free ETS allowances given to EU manufacturers. The factor increases each year as free allocations decrease, reaching 100% by 2034.
Can local carbon payments in India reduce EU CBAM fees?
Yes. CBAM regulations allow importers to deduct verified carbon costs paid in the country of manufacture. As India's Carbon Credit Trading Scheme establishes recognized verification structures, local carbon compliance costs can be used to offset EU border adjustments.