This article analyzes the entry into force of the Carbon Border Adjustment Mechanism (CBAM) in 2026, a carbon tax that will increase the cost of steel, aluminum, and cement imports in Spain. We explain the mandatory registration with the Spanish Tax Agency (AEAT) and how to avoid penalties through supplier audits and rigorous financial forecasting of emission costs to protect the importer’s profitability.
Questions answered in this post:
- What is the CBAM mechanism and when does it come into effect?
- Why has the European Union decided to tax carbon at borders?
- What specific procedures must Spanish importers follow with the Spanish Tax Agency (AEAT)?
- What happens if a company does not comply with the new emissions regulations?
- How can companies calculate the economic impact on their profit margins?
- What information should we request from our international suppliers right now?
International trade doesn’t stop. However, sometimes the rules of the game change drastically. On January 1, 2026, a new bureaucratic hurdle will be erected in the European Union. It’s called the Carbon Border Adjustment Mechanism, or CBAM. It’s not just another formality. It’s a direct tax on carbon emissions linked to products like steel, aluminum, and cement. If you import these goods, the playing field has just shifted.
The problem: pollution now has a price at customs.
The problem is clear. Until now, producing outside Europe was, in many cases, cheaper because environmental regulations were more lenient. This created unfair competition. The CBAM (Carbon and Carbon Association) aims to correct this imbalance. The European Union wants to prevent carbon leakage.
What exactly does this concept mean? Carbon leakage occurs when companies move their production to countries with less stringent climate policies to save costs. It’s pointless to clean up our industry if we continue importing pollution from third countries. Essentially, it’s about preventing the emissions we reduce here from ending up being produced elsewhere on the planet without any control. Therefore, the importer will have to bear the cost of that CO2.
Why does this happen and what is the impact in Spain?
Where does this change come from? Europe is leading the way in global decarbonization. By implementing this mechanism, it aims to ensure that foreign products pay the same for their pollution as those manufactured on European soil. In Spain, the impact is direct and operational. As an importer, you are required to register as an authorized declarant with the Spanish Tax Agency (AEAT). Failure to do so will result in customs delays. The penalties will be substantial. Your profit margins could evaporate if you don’t factor in the cost of the carbon certificates required to import your goods into the country.
Our solutions to protect your business
At AGC Newtral, we want you to navigate this transition safely. Don’t wait until the last minute. Here’s how to mitigate the impact:
- Supplier sustainability audit: Request actual emissions data from your manufacturers outside the EU now. Why? Because without accurate technical information, you won’t be able to complete the declaration. Without data, customs will apply default values, which are usually much more expensive and detrimental to your bottom line.
- Calculate the financial impact: Integrate the cost of carbon certificates into your overhead costs starting today. Why? Because cash flow is the lifeblood of your business. Knowing the true additional cost allows you to adjust your sales prices in advance and avoid unpleasant financial surprises in January 2026.
Planning is your best ally. We’re here to ensure your supply chain is as green as it is efficient.


