Corrected CBAM Default Values Published for the Definitive Period: Importers Should Reassess Their CBAM Exposure

Summary

European Commission publishes corrected CBAM default values
On 10 August 2026, the European Commission published the corrected default values applicable to the CBAM definitive period. The Commission confirmed that the legally binding values remain those contained in Commission Implementing Regulation (EU) 2025/2621, as corrected by Implementing Regulation (EU) 2026/1740. An updated Excel version has been made available for information purposes, while a consolidated legal text is expected to follow. [taxation-c….europa.eu]
Default values may significantly increase CBAM costs
Default values are intentionally conservative and may include built-in mark-ups designed to encourage the use of verified actual emissions data. As a result, importers relying solely on default values could face higher CBAM certificate obligations than companies able to obtain verified emissions information directly from suppliers or production facilities. [cbamguide.com], [co2-iq.com]
Reviewing emissions data has become a strategic priority
The publication of the corrected values provides an opportunity for importers to reassess their CBAM reporting approach, cost provisions and supplier engagement strategies. Comparing default values with actual supplier emissions may reveal opportunities to reduce future CBAM liabilities, improve reporting accuracy and prioritize the collection of emissions data throughout the supply chain. [taxation-c….europa.eu], [carboneer.earth]

Extended Article

1. European Commission Publishes Corrected CBAM Default Values

The European Commission has published the corrected default values for the Carbon Border Adjustment Mechanism (CBAM) definitive period. The update was made available on 10 August 2026 through the Commission’s official CBAM guidance portal. The Commission clarified that the legally binding values remain those set out in Commission Implementing Regulation (EU) 2025/2621, as subsequently corrected by Commission Implementing Regulation (EU) 2026/1740. A consolidated version of the regulation is expected to become available shortly. [taxation-c….europa.eu]

The corrected default values are accompanied by an Excel file intended as a practical reference tool. However, businesses should note that the spreadsheet is provided for convenience only and does not replace the legal provisions contained in the published regulations. Importers relying on default values for CBAM calculations should therefore ensure that internal systems and reporting processes reflect the corrected figures. [taxation-c….europa.eu], [carboneer.earth]

External sources:

European Commission CBAM Legislation and Guidance

2. Why the Corrections Matter

For many importers, default values remain the fallback mechanism when supplier-specific emissions data is unavailable. Under the CBAM framework, these values determine the embedded emissions assigned to imported products and, consequently, the number of CBAM certificates that may ultimately need to be purchased and surrendered. [co2-iq.com], [taxation-c….europa.eu]

The recent corrections are more than a technical adjustment. Industry analyses indicate that the amendments address issues ranging from commodity code corrections and country-specific emission factors to other technical inconsistencies that could materially affect CBAM calculations. Since the corrections apply to values used during the definitive period, companies should evaluate whether previously modelled CBAM costs remain accurate. [carboneer.earth], [cbamguide.com]

Organizations that have incorporated the original default values into forecasting models, financial provisions, procurement decisions or pricing strategies may wish to revisit these assumptions in light of the corrected data. [carboneer.earth], [cbamguide.com]

3. Actual Emissions Data May Reduce CBAM Exposure

The publication of the corrected values also highlights a broader strategic question: should companies continue using default values where actual emissions data is available?

CBAM legislation generally allows declarants to use verified actual emissions data obtained from the production installation where the imported goods are manufactured. Where such information can be obtained and verified, it often provides a more accurate reflection of the product’s environmental footprint than the Commission’s default values. [co2-iq.com]

Many default values are intentionally conservative. Their purpose is not only to provide a fallback calculation mechanism but also to incentivize importers to obtain emissions data directly from suppliers. In practice, this means that reliance on default values may result in higher embedded-emissions calculations and therefore higher future CBAM costs. Industry commentary has highlighted that the difference between actual and default values can be substantial for certain sectors and countries of origin. [cbamguide.com], [co2-iq.com]

Consequently, importers should assess whether collecting verified supplier data could lower their CBAM liability and improve the accuracy of internal reporting.

4. Focus Areas for Businesses

The correction of the default values provides a timely opportunity for CBAM declarants to review their overall compliance and cost-management strategy.

Particular attention should be given to:

Existing CBAM cost calculations and provisions;
Products currently reported using default values;
Supplier readiness to provide verified emissions information;
Data collection and governance processes;
Long-term CBAM certificate exposure modelling.

Businesses that prioritize supplier engagement and emissions-data collection may be better positioned to manage future CBAM costs and compliance obligations as the mechanism continues to evolve. [taxation-c….europa.eu], [co2-iq.com], [cbamguide.com]

5. Looking Ahead

With the definitive phase of CBAM now underway, emissions data quality is becoming an increasingly important commercial and compliance consideration. The publication of the corrected default values serves as a reminder that default values should not necessarily be viewed as the optimal reporting solution. Companies capable of obtaining verified actual emissions data may find opportunities to reduce exposure, improve reporting precision and strengthen supply-chain transparency. [taxation-c….europa.eu], [cbamguide.com]

As further CBAM implementing measures and guidance continue to emerge, importers should remain vigilant and regularly reassess the assumptions underlying their CBAM reporting and financial planning.

Further Reading