How to Calculate CBAM Costs

By Ahmed Medhat · Published11 April 2026 · Updated 19 October 2026

Understanding the EU CBAM Cost Calculation Methodology for Exporters

Corrected 19 October 2026: an earlier version said the cross-sectoral correction factor for 2026 had not been published. It was published on 24 July 2026 at 100 % (Commission Implementing Decision (EU) 2026/1862). No figure changes.

How the DeCarbonPro CBAM Cost Calculator Works for Installations

Disclaimer: The calculations provided by this tool are approximate estimates based on available EU product benchmarks and country-level default values. Certificate prices for periods not yet published are levels you choose. These projections are designed to help installations assess the future financial impact on their EU buyers and should not be considered definitive financial obligations.

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What is the CBAM Cost Calculator?

The DeCarbonPro CBAM Calculator is a predictive tool designed to help non-EU operators and exporters estimate the CBAM certificate cost their EU buyers face on goods imported from 2026.

By understanding the exact CBAM exposure of your specific products, you can price your exports and give your buyers the emissions data they declare. Our calculations utilize the latest EU-published default values and benchmarks specific to your product's CN code and your installation's country of origin.

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The Calculation Methodology

The formulas used to determine the CBAM liability applied to your goods differ depending on your manufacturing sector, specifically regarding how indirect emissions (like the electricity you purchase) are treated.

1. For Iron and Steel, Aluminium and Hydrogen

For the iron and steel goods listed in Annex II, aluminium and hydrogen, only direct emissions (emissions generated at your installation) count (Regulation (EU) 2023/956, Article 7(1) and Annex II):

$\text{CBAM Cost (€/t)} = \max\left(0,\ \text{EF}_{\text{direct}} - \text{Benchmark} \times \text{CBAM Factor} \times \text{CSCF} \right) \times \text{Certificate Price}$

2. For Cement, Fertilisers and Agglomerated Iron Ore

Cement, fertilisers and agglomerated iron ore (CN 2601 12 00) are in Annex I but not in Annex II, so both direct and indirect emissions count (Article 7(1)):

$\text{CBAM Cost (€/t)} = \max\left(0,\ \text{EF}_{\text{direct}} + \text{EF}_{\text{indirect}} - \text{Benchmark} \times \text{CBAM Factor} \times \text{CSCF} \right) \times \text{Certificate Price}$

3. Total Financial Impact on Your Buyer

Once the cost per tonne of your product is established, the total estimated obligation your buyer will face is:

$\text{Total CBAM Cost (€)} = \text{Volume (tonnes)} \times \text{CBAM Cost (€/t)}$

(Where EF = Your Installation's Emissions Factor in tCO2e/t)

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The Exporter's Dilemma: Actual Data vs. Default Values

For goods imported from 2026, your EU buyers surrender CBAM certificates each year for the embedded emissions declared for your goods, first by 30 September 2027 (Article 22(1)).

1. The Default Route: If your installation cannot provide verified emissions data, your buyers will have to use the EU's default Specific Embedded Emissions (SEE). Annex IV, point 4.1 of Regulation (EU) 2023/956 sets those at the average emission intensity of your exporting country for the good, increased by a mark-up — so they describe the country you ship from, not your installation, and your goods are declared at the country average plus the mark-up.
2. The Actual Route: By tracking and calculating your installation's actual embedded emissions, you give your buyer a figure for your own installation, and a verified actual value carries no mark-up. Actual emissions must be verified by a verifier accredited pursuant to Article 18 (Article 8(1)).

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Glossary of Calculation Components

To understand your results, it is helpful to know exactly what goes into the formulas:

Specific Embedded Emissions (SEE)

This is your facility's core emissions factor. It represents the total carbon emissions associated with producing your specific CN code. For our baseline 2026 estimations, the calculator applies the regulation's own mark-up (IR (EU) 2026/1740, Annex I) to the currently available EU CBAM default values — 10% for cement, iron and steel, aluminium and hydrogen, 1% for fertilisers — which is the figure your buyer uses where no verified actual value is provided.

Specific Embedded Free Allocation (SEFA) / "The Benchmark"

To ensure a level playing field, the EU subtracts the amount of "free carbon allowances" that a similar operator inside the EU would have received. The EU provides default SEFA values based on the CN code and the assumed production route of your origin country.

CBAM Certificate Price

CBAM certificates are priced from EU ETS auction clearing prices — for goods imported in 2026, the quarterly average of those prices (IR (EU) 2025/2548, Art. 1(1); Reg. (EU) 2023/956, Art. 21(1a)); from 2027, the weekly average (IR 2025/2548, Art. 5). The Commission publishes the figure; it is not a secondary-market quote. Where a quarter has not been published yet, this calculator prices it at a level you choose. Only the published figure is the price importers actually pay.

CBAM Factor

The free allocation deducted from embedded emissions is the benchmark times the year's CBAM factor times the cross-sectoral correction factor (IR (EU) 2025/2620, Annex). The CBAM factor is 97.5% in 2026, falls each year, and no longer applies from 2034 (Directive 2003/87/EC, Article 10a(1a)).

Carbon Price Paid Overseas

Where actual emissions are used and a carbon price was effectively paid in your manufacturing country for them, your buyer can claim a reduction in the number of CBAM certificates to surrender, net of any rebate or other compensation available there (Regulation (EU) 2023/956, Article 9(1)). Where default values are used, the reduction can be claimed only by reference to yearly default carbon prices (Article 9(4)).

Cross-Sectoral Correction Factor (CSCF)

The CSCF is the EU ETS factor that keeps total free allocation within its legal maximum, and it enters the free allocation adjustment under CBAM. The Commission determines it (IR (EU) 2025/2620, Annex, citing Article 14(6) of Delegated Regulation (EU) 2019/331). It is 100 % for each year from 2026 to 2030 (Commission Implementing Decision (EU) 2026/1862, Article 1). Later years are not set yet; this calculator takes them as 100 % until the Commission sets them.