Carbon border adjustment mechanism (CBAM) implementation KPIs by sector (with ranges)

The EU's Carbon Border Adjustment Mechanism entered its transitional phase in October 2023, and by Q1 2026 over 350,000 CBAM declarations have been filed covering roughly EUR 170 billion in goods. As the mechanism shifts from reporting-only to financial obligations in January 2026, companies importing iron, steel, aluminium, cement, fertilisers, electricity, and hydrogen face direct cost exposure tied to embedded carbon intensity. The KPIs that matter now are not generic compliance checkboxes: they are sector-specific metrics that determine cost competitiveness, supply chain resilience, and regulatory standing.

Quick Answer

CBAM KPIs span three dimensions: emissions measurement accuracy, compliance operations efficiency, and cost exposure management. Benchmark ranges differ significantly by sector. Steel importers face embedded carbon intensities of 1.2 to 2.8 tonnes CO2e per tonne of product, while aluminium spans 2.0 to 16.0 tonnes CO2e per tonne depending on electricity source. The companies tracking the right KPIs are reducing CBAM cost exposure 15 to 30% through supplier selection and process optimisation, while those treating CBAM as a box-ticking exercise are discovering six-figure quarterly surcharges they failed to budget for.

Why It Matters

CBAM is the world's first operational carbon border tariff at scale. It reprices imported goods based on their production emissions, creating a direct financial incentive to source from lower-carbon producers. For EU importers, embedded carbon is now a procurement variable on par with price and lead time.

The financial stakes are substantial. The European Commission estimates CBAM will generate EUR 1.5 to 2.1 billion annually once fully phased in by 2034. For individual importers, the cost depends on the carbon intensity gap between their supply chain and EU benchmarks. A steel importer sourcing from coal-intensive blast furnaces in a country without carbon pricing could face EUR 50 to 80 per tonne of embedded CO2, applied to every tonne of steel crossing the EU border.

Beyond compliance costs, CBAM is accelerating procurement decisions. Importers that can demonstrate lower embedded carbon gain competitive advantage. Exporters investing in decarbonisation retain EU market access as free EU ETS allowances phase down between 2026 and 2034.

Key Concepts

Embedded Emissions: The total greenhouse gas emissions attributable to the production of a CBAM good, including direct emissions from production (Scope 1) and indirect emissions from electricity consumed during production. Measured as tonnes CO2e per tonne of product.

CBAM Certificate: Financial instruments that EU importers must purchase to cover the embedded emissions in imported goods. Priced weekly at the average EU ETS allowance auction price. In Q1 2026, certificate prices have averaged EUR 62 to 68 per tonne CO2.

Default Values: Emission intensity values assigned by the European Commission when actual production data is unavailable. Default values are set at the average intensity of the 10% worst-performing installations in the EU for each product category, creating a strong incentive to report actual data.

Authorised CBAM Declarant: An importer registered in the CBAM registry who is authorised to import CBAM goods and file quarterly reports. Registration requires submission of verified production data from non-EU installations.

KPIs by Sector

Iron and Steel

KPI	Low Performer	Average	Top Performer
Embedded CO2e per tonne of crude steel	2.4 to 2.8 t	1.8 to 2.3 t	1.2 to 1.7 t
Share of production data vs. default values	<30%	50 to 70%	>90%
CBAM cost per tonne imported	EUR 120 to 180	EUR 70 to 119	EUR 25 to 69
Supplier decarbonisation engagement rate	<10%	25 to 40%	>60%
Reporting accuracy (variance from verification)	>15%	5 to 15%	<5%

Steel represents the largest CBAM product category by import volume. The spread between blast furnace (BF-BOF) and electric arc furnace (EAF) routes creates a factor-of-two difference in embedded emissions. Importers sourcing EAF steel from regions with clean electricity grids (Nordic countries, parts of South America) can achieve embedded intensities below 0.6 tonnes CO2e per tonne. Importers relying on BF-BOF from coal-dependent producers face intensities above 2.5 tonnes.

Aluminium

KPI	Low Performer	Average	Top Performer
Embedded CO2e per tonne of primary aluminium	12.0 to 16.0 t	6.0 to 11.9 t	2.0 to 5.9 t
Electricity source documentation rate	<40%	55 to 75%	>85%
CBAM cost per tonne imported	EUR 500 to 1,000	EUR 250 to 499	EUR 80 to 249
Scrap/secondary aluminium share	<15%	30 to 50%	>60%
Data submission timeliness (days before deadline)	0 to 3 days	7 to 14 days	>21 days

Aluminium CBAM exposure is dominated by electricity source. Smelters powered by hydroelectricity (Iceland, Norway, Canada) produce aluminium at 2 to 4 tonnes CO2e per tonne, while coal-powered smelters (parts of China, India) exceed 15 tonnes CO2e per tonne. The KPI spread in aluminium is the widest of any CBAM sector, making supplier selection the single most powerful lever for cost management.

Cement

KPI	Low Performer	Average	Top Performer
Embedded CO2e per tonne of clinker	0.85 to 1.05 t	0.72 to 0.84 t	0.55 to 0.71 t
Clinker-to-cement ratio	>85%	70 to 84%	<70%
Alternative fuel substitution rate	<10%	20 to 40%	>50%
CBAM cost per tonne imported	EUR 45 to 65	EUR 28 to 44	EUR 12 to 27
Process emissions data completeness	<60%	70 to 85%	>90%

Cement presents a unique challenge: roughly 60% of emissions come from the calcination process (converting limestone to clinite), which cannot be eliminated through fuel switching. KPIs that focus exclusively on energy emissions miss the dominant source. Top performers track clinker factor (ratio of clinker to cement) because blended cements with supplementary cementitious materials can reduce embedded emissions 20 to 35% without changing kiln operations.

Fertilisers

KPI	Low Performer	Average	Top Performer
Embedded CO2e per tonne of ammonia	2.8 to 3.5 t	2.0 to 2.7 t	0.5 to 1.9 t
Natural gas intensity (GJ per tonne NH3)	>38	33 to 37	<33
N2O abatement installation rate	<20%	50 to 70%	>85%
CBAM cost per tonne imported	EUR 140 to 220	EUR 80 to 139	EUR 20 to 79
Green hydrogen feedstock share	0%	1 to 5%	>10%

Fertiliser CBAM exposure centres on ammonia production, where natural gas serves as both energy source and hydrogen feedstock. Best available technology (BAT) achieves around 28 GJ per tonne of ammonia, but the global average sits above 34 GJ. N2O emissions from nitric acid production can be abated 85 to 95% with catalyst technology, yet many producers outside the EU have not installed abatement equipment, creating a large KPI gap.

Hydrogen and Electricity

KPI	Low Performer	Average	Top Performer
Hydrogen: CO2e per kg H2	>10 kg	4 to 9 kg	<4 kg
Electricity: Grid emission factor (g CO2/kWh)	>600	250 to 599	<250
Renewable energy certificate documentation	<30%	50 to 70%	>90%
Additionality verification for green claims	None	Partial	Full temporal matching

Hydrogen CBAM exposure is highly binary: grey hydrogen from steam methane reforming without CCS carries roughly 9 to 12 kg CO2 per kg H2, while green hydrogen from electrolysis with renewable electricity sits below 2 kg CO2 per kg H2. Electricity imports face CBAM obligations based on the exporting country's grid emission factor unless direct contractual arrangements can be demonstrated.

What's Working

Actual data replacing default values: Importers that invested in collecting installation-level production data from non-EU suppliers are seeing CBAM costs 30 to 50% lower than those relying on Commission default values. The data collection effort is significant (averaging 40 to 80 hours per supplier relationship for initial onboarding), but the financial payoff is immediate.

Integrated procurement and compliance workflows: Companies embedding CBAM cost calculations into procurement decision tools are making better sourcing decisions. ArcelorMittal's European operations now factor CBAM-adjusted landed cost into every steel import decision. Norsk Hydro provides verified emission certificates with aluminium shipments, turning low-carbon production into a competitive differentiator.

Cross-functional CBAM teams: Organisations that have built dedicated teams spanning procurement, sustainability, customs, and finance are outperforming those treating CBAM as a sustainability-department-only initiative. Heidelberg Materials has integrated CBAM tracking into its SAP-based procurement system, automating data collection and cost forecasting.

What's Not Working

Retroactive data collection: Companies that waited until the transitional period deadline to request emission data from suppliers found many producers unable or unwilling to provide installation-level information. Default values are punitive by design, and switching from default to actual values mid-cycle creates audit complexity.

Treating CBAM as a one-off compliance exercise: The mechanism tightens every year as free EU ETS allowances phase down. Companies that optimised for today's reporting requirements without building systems to track the increasing financial obligations from 2026 through 2034 are accumulating hidden cost exposure.

Ignoring indirect emissions: Some importers focused exclusively on direct production emissions and overlooked CBAM's inclusion of indirect emissions (electricity consumed during production). For aluminium and certain steel products, indirect emissions can exceed direct emissions, making this a costly oversight.

Key Players

Established Leaders

• European Commission DG TAXUD: Operates the CBAM Transitional Registry and sets default emission values. Has processed over 350,000 transitional declarations since October 2023.
• Deloitte: Advises Fortune 500 importers on CBAM compliance strategy. Published sector-specific implementation guides covering all six CBAM product categories.
• PwC: Provides CBAM readiness assessments and has built automated reporting tools integrated with customs management systems.
• SGS: Offers third-party verification of embedded emissions data for CBAM declarations. Accredited verification body operating across 40+ countries.

Emerging Startups

• Green CBAM Solutions: Berlin-based platform automating CBAM data collection from non-EU installations with multilingual supplier onboarding tools.
• Arbor (formerly CarbonChain): AI-driven commodity emissions tracking platform that provides CBAM-grade carbon intensity data for metals and bulk materials.
• Ecoinvent: Lifecycle inventory database increasingly used as fallback data source for CBAM embedded emissions calculations when installation-specific data is partial.
• Plan A: Carbon accounting platform that has added CBAM-specific reporting modules supporting quarterly declaration workflows.

Key Investors and Funders

• European Investment Bank: Financing decarbonisation projects in CBAM sectors through InvestEU green transition instruments.
• Breakthrough Energy Ventures: Backing low-carbon production technologies across steel, cement, and hydrogen that directly reduce CBAM exposure.
• HSBC Climate Solutions: Structuring trade finance products that incorporate CBAM cost exposure into pricing for EU-bound commodity flows.

Action Checklist

1. Map all imports by CBAM product category and quantify current embedded emissions using installation-level data where available
2. Calculate CBAM cost exposure under current EU ETS prices and model exposure through 2034 as free allowances phase down
3. Engage top 10 suppliers by import volume to collect verified production emission data and replace default values
4. Build or procure CBAM reporting software integrated with customs and procurement systems
5. Establish quarterly declaration workflow with internal review cycle completing at least 14 days before submission deadline
6. Evaluate supplier switching options where CBAM cost differential exceeds 15% of landed product cost
7. Monitor EU ETS allowance price trends and hedge CBAM certificate purchases against price volatility

FAQ

What happens if I use default values instead of actual emission data? Default values are set at the emission intensity of the worst-performing 10% of EU installations for each product. For steel, this means an embedded intensity roughly 40 to 60% higher than the actual EU average. Using actual data from your suppliers almost always results in lower CBAM costs, unless your suppliers genuinely operate at the bottom of the efficiency distribution.

How does CBAM interact with carbon pricing in the exporting country? If the exporting country has its own carbon pricing mechanism (carbon tax or emissions trading system), the importer can deduct the carbon price already paid from the CBAM certificate obligation. This requires documentary evidence of the price paid and applies only to prices effectively borne by the producer, not to any free allowances received.

When do CBAM financial obligations begin? Financial obligations began on January 1, 2026. The transitional phase (October 2023 to December 2025) required quarterly reporting of embedded emissions without financial payment. From 2026, authorised CBAM declarants must surrender CBAM certificates corresponding to the embedded emissions in imported goods, with certificates purchased at the weekly EU ETS auction price.

Which products are covered and will the scope expand? CBAM currently covers iron and steel, aluminium, cement, fertilisers, electricity, and hydrogen. The European Commission is mandated to assess extending CBAM to other products at risk of carbon leakage, including organic chemicals, polymers, and downstream manufactured goods, with a review by 2030.

How should companies budget for CBAM costs? Model three scenarios using current EU ETS prices (EUR 60 to 70/tonne CO2), a mid-range projection (EUR 80 to 100/tonne by 2030), and a high scenario (EUR 120+/tonne). Multiply by embedded emissions per unit imported, adjusting for the phase-down of free EU ETS allowances, which reduces by roughly 10 percentage points per year from 2026 to 2034.

Sources

1. European Commission. "Carbon Border Adjustment Mechanism: Transitional Phase Report." DG TAXUD, 2025.
2. World Bank Group. "State and Trends of Carbon Pricing 2025." World Bank, 2025.
3. Sandbag Climate. "CBAM Tracker: Transitional Phase Data Analysis." Sandbag, 2025.
4. International Energy Agency. "Iron and Steel Technology Roadmap: Towards More Sustainable Steelmaking." IEA, 2024.
5. International Aluminium Institute. "Aluminium Sector Greenhouse Gas Pathways to 2050." IAI, 2024.
6. European Cement Association (CEMBUREAU). "Cementing the European Green Deal: Carbon Neutrality Roadmap." CEMBUREAU, 2024.
7. Fertilizers Europe. "CBAM Implementation Guide for Nitrogen Fertiliser Importers." Fertilizers Europe, 2025.