Tarragona: The implementing act the Commission published on 13 May puts numbers on something Iberian importers have been bracing for since the December agreement in Council. The default emission values that traders can plug in when they cannot or will not collect verified data from their suppliers now carry a built-in surcharge. Ten percent above the benchmark this year, twenty next year, thirty from 2028. For the chemical and steel clusters that ring the Catalan port, that surcharge translates directly into surrendered allowances once the definitive phase opens on 1 January.
The four-week public consultation that opened with the act closes on 10 June, and the comment box has already attracted submissions from the cement, fertiliser and electricity supply chains, alongside the steel federations that worked the autumn drafting rounds hardest. Importers who had hoped the Commission would soften the curve while data infrastructure caught up are reading the text as the opposite signal. The surcharge is the price of refusing to do the verification work, and Brussels wants the refusal to grow more painful each year.
Fertilisers carry the only meaningful carve-out. Default values in that segment will edge up at one percent annually rather than the steep top-up, a concession to the agricultural sensitivity that EU member-state ministers flagged loudly through the spring. Nitrogen producers along the Mediterranean coast had warned that loading the surcharge on top of already high gas-linked exposure would cascade through fertiliser prices into food. The fertiliser exception keeps that pathway controlled, even as the surcharge becomes the lever Brussels uses to push every other importer toward actual-data reporting.
The new default values themselves are differentiated by both country and product, which is a step up from the transitional period that ran on global averages. Each origin-product combination now sits against a specific production route benchmark, with values split between direct and indirect emissions. That granularity is supposed to reward suppliers in cleaner jurisdictions while penalising those whose carbon profile sits well above benchmark, which is the design logic the regulation has carried since the start.
The practical hurdle for importers is access. Verified third-country data is patchy outside the largest exporters, and the cost of commissioning verification often outweighs the savings against a single-shipment default. The Commission’s expectation is that the surcharge curve will eventually flip that economics, particularly for buyers handling steady volumes from origins where the default sits well above the actual carbon intensity.
The Tarragona steel and chemicals nexus is one of several Mediterranean clusters now running parallel exercises. Verification firms in the area have been hiring assessors quietly through the spring, and the larger refining and steel processors are bringing supplier-data collection in-house. The smaller and mid-cap importers are the segment most exposed to the surcharge, since the fixed costs of building a verification programme do not amortise easily over modest shipment volumes.
The consultation reply window is short by design. The Commission services have signalled they want the implementing act finalised before the summer recess, with the values then in force for the definitive phase that opens in January. That timeline leaves little room for fundamental redesign of the surcharge curve, even if submissions land arguing the trajectory is too steep.
Beyond the immediate compliance arithmetic, the surcharge mechanism is a quiet test of how aggressively Brussels is prepared to push transitional flexibility off the table. The default value was always meant to be a fallback, not a long-term option. The 2026 to 2028 escalator is the policy admission that the fallback was being used as a base case, and the Commission has decided the base case needs to hurt.
