The EU's Carbon Border Adjustment Mechanism has a defensible core: if you price carbon at home, you need to price it at the border or production just moves somewhere cheaper. That logic is sound. The mechanism that entered its definitive phase on January 1, 2026 — requiring EU importers to surrender certificates priced at the EU ETS carbon price for embedded emissions in six sectors — is a reasonable implementation of it.
What's happening now is different. The Commission is proposing to extend CBAM to 180 downstream products. The Council has countered with 332. The European Parliament's environment committee wants 277. The numbers keep growing, and the climate rationale keeps shrinking.
The Cost-Push Test Is Doing Too Much Work
The extension proposal uses a "cost-push factor" — comparing the carbon cost of steel or aluminum content in a finished product against the sector's gross value added — to determine which downstream goods get pulled into scope. Products above a 5% threshold qualify.
The problem is that this threshold captures goods where carbon leakage risk is essentially theoretical. Bruegel's analysis runs the numbers on dishwashers: at a carbon price of €115/tCO₂e, steel prices rise roughly 25-30%, but because steel represents about 10% of a dishwasher's final value, the overall price increase is only 2.5-3.0%. That's not a carbon leakage risk. Nobody is relocating dishwasher factories to avoid a 2.5% cost increase. Only at carbon prices well above current levels — and with cost-push factors above 15% — does the leakage logic actually hold.
The Council's 332-product list includes final consumption goods and intermediate products embedded in complex value chains. Importers would need to report embedded emissions across multiple supplier jurisdictions, with no equivalent obligation on domestic producers of the same downstream goods. That asymmetry is a compliance cost, not a climate policy. And the default values for non-reporting are set punitively high, which means the mechanism becomes a de facto tariff for any importer who can't navigate the reporting requirements — which is most of them.
Bruegel's conclusion is blunt: the downstream expansion is more about trade protection than stopping carbon leakage. That's a credibility problem for a mechanism that derives its WTO defensibility from being an environmental measure, not a trade one.
The ETS Price Signal Is Already Getting Softer
Here's the timing issue. CBAM's certificate price is mechanically linked to the EU ETS price. The Q2 2026 CBAM certificate price was €75.28/tCO₂e, tracking the ETS closely. But the ETS itself is now under reform pressure that's pulling prices down.
On July 17, the European Commission proposed an overhaul of the ETS that would slow the annual rate at which the emissions cap falls — effectively releasing supply pressure. Reuters reported that a survey of nine analysts now forecasts EU allowances averaging €79.97/ton in 2026 and €89.13 in 2027, down from April forecasts of €80.61 and €93.29 respectively. The benchmark contract was trading around €82/ton at the time of reporting.
The Commission is also planning to sell 400 million EUAs into an "investment booster" fund targeting roughly €30 billion for industrial clean technology — which adds further supply to the market and explains why analysts pushed 2028-2030 forecasts slightly higher while trimming near-term ones.
What this means for CBAM: the mechanism's bite depends entirely on the ETS price. If the ETS reform softens prices through 2027, CBAM certificates get cheaper, the carbon cost signal weakens, and the competitive pressure on high-emission exporters to clean up their production diminishes. The mechanism is being expanded in scope at the same moment its underlying price signal is being deliberately moderated. Those two moves are working against each other.
The Competitiveness Arithmetic Isn't Symmetric
One underappreciated wrinkle: CBAM protects EU producers in their home market, but it doesn't help them compete abroad. Rabobank's analysis of EU-UK trade illustrates this clearly. EU cement, aluminum, iron, and steel production is on average less carbon-intensive than UK production, so CBAM gives EU producers a relative advantage on the EU domestic market. But when EU producers export to the UK, they're competing under the UK's separate carbon pricing system — and if the EU carbon price runs 3-9% higher than the UK price, that carbon-intensity advantage gets erased. The same dynamic applies to any export market where EU producers face competitors who paid lower carbon costs at home.
This is the structural bind that downstream expansion makes worse. Extending CBAM to 332 products raises compliance costs for importers into the EU, which protects domestic producers at home. It does nothing for those same producers' competitiveness in export markets. The mechanism becomes increasingly asymmetric — a shield, not a sword — and the more it looks like industrial protection, the harder it is to defend at the WTO.
The first CBAM certificate payment deadline is September 30, 2027. Watch for the downstream expansion legislative outcome before then — if the Council's 332-product list survives, expect the first serious WTO challenge to follow shortly after.
