EU carbon tax on imports threatens Brussels businesses as federal rules tighten

The European Commission's revised Carbon Border Adjustment Mechanism takes effect October 1st, and Brussels companies are scrambling to understand what it means for their bottom lines. The federal policy—designed to prevent carbon-intensive goods from undercutting EU producers—will slap tariffs on imported steel, cement, aluminum, fertilizer, and electricity entering the bloc. For a city that imports roughly 40% of its industrial inputs from outside Europe, the impact will be immediate and widespread.

The timing matters. After two years of pilot testing, Brussels firms have moved past the advisory phase. Starting in four months, importers will face actual tariffs calculated on embedded carbon in their supply chains. Companies in the Anderlecht industrial zone, home to dozens of manufacturing operations and logistics hubs, are particularly exposed. The policy forces a reckoning with globalized production chains that have defined European commerce for decades.

Local companies face real costs

A mid-sized automotive parts manufacturer based on Rue de Trèves in the European quarter estimates the new tariffs could add 8 to 12 percent to procurement costs for certain metal components sourced from India and Turkey. That company supplies two major assembly plants in Flanders and currently absorbs about 15 million euros annually in raw material purchases. The Commission's own impact assessment, released in May, projected tariff premiums ranging from 5 to 25 percent depending on the product and origin country.

Brussels retailers already nervous about margins are watching closely. The Galeries Saint-Hubert, the historic shopping arcade in the city center, hosts multiple fashion and home goods importers who rely on Chinese and Southeast Asian suppliers. A spokesperson for the retail merchants' association representing shops along the gallery and nearby Rue Neuve confirmed that members received legal briefings from customs consultants earlier this week about import documentation and tariff calculations.

The federal government in Belgium has announced it will provide 50 million euros in transition support for companies with annual revenues under 50 million euros—essentially small and medium enterprises. Applications open August 15th through the Economy Ministry's dedicated CBAM support portal. Larger operations get nothing.

Who pays and when

The Commission designed the system to let importers claim credits if they've already paid carbon costs in their home countries, but companies must furnish documentation proving this. For many suppliers in countries without robust carbon pricing—Indonesia, Pakistan, Ukraine—no such credits exist. Those importers simply eat the cost or pass it to Brussels distributors and retailers.

The Port of Antwerp, Belgium's largest goods entry point, processed 225 million tons of cargo in 2025. Roughly 35 percent came from non-EU countries. Customs authorities there have hired 40 additional staff members to handle CBAM documentation since March. Similar hiring occurred at Brussels Airport's cargo facility, which handled 650,000 tons of international freight last year.

Companies should audit their supply chains now. The Commission requires importers to declare carbon content of goods starting October 1st, even if tariffs don't formally apply until January 2027. Getting the paperwork wrong invites customs delays and penalties. Trade lawyers specializing in EU regulations are booked solid in Brussels through September. The Belgium External Trade Association held a packed information session on June 28th at their offices near Place de la Monnaie with over 200 attendees.

Businesses have less than four months to map their supplier emissions data, redesign procurement strategies, or negotiate new contracts with lower-carbon producers inside the EU. Some are quietly shifting sourcing to countries with carbon pricing systems. Others are investing in local production capacity. For Brussels, a city where import-dependent industries employ roughly 42,000 people across manufacturing and logistics, the federal policy's first real teeth will bite hard when autumn invoicing arrives.