Vietnam's €580 Million Annual Exposure and What Exporters Must Do Before Q3

The EU Carbon Border Adjustment Mechanism entered its fully enforceable financial phase on January 1, 2026. For Vietnamese steel, aluminum, cement, and fertilizer exporters, the cost of inaction is now measurable — and it compounds every quarter.

A 10,000-tonne shipment of hot-rolled coil from Haiphong to Rotterdam now carries a potential carbon liability of up to EUR 616,000. Not because the steel is unusually carbon-intensive, but because the exporter lacks verified, installation-level emissions data. Under CBAM, that missing data triggers the default-value mechanism — and the penalty for using defaults rises every year.

For Vietnamese manufacturers, this is no longer a distant compliance exercise. It is a margin event.

From Reporting to Payment

CBAM operated in a transitional reporting-only phase from October 2023 through December 2025. Importers into the EU had to report the embedded emissions of covered goods, but no financial obligation attached. That changed on January 1, 2026. Importers must now purchase and surrender CBAM certificates equal to the verified emissions of imported steel, aluminum, cement, fertilizer, electricity, and hydrogen.

The mechanism is designed to prevent carbon leakage — the shift of carbon-intensive production to jurisdictions with weaker climate rules. In practice, it means that EU importers will increasingly prefer suppliers who can prove low emissions with audited data. Suppliers without that proof become structurally more expensive, not because of their actual performance, but because of regulatory uncertainty.

The €580 Million Exposure

Vietnam's four carbon-intensive export sectors to the EU face a combined direct CBAM exposure of approximately €580 million annually, according to analysis by TTI / Terawatt Times. The breakdown is revealing:

• Steel: €431 million per year. Vietnam's iron and steel exports to the EU exceeded EUR 2.2 billion in 2024 — an exposure ratio of more than 18 to one versus Thailand.
• Aluminum: €150 million per year. The sector's carbon liability is externally sourced: Vietnamese fabricators rely on Chinese primary aluminum with an embedded intensity of 14.8 tCO₂e/t, creating a combined intensity of 16.3 tCO₂e/t. For some exporters, this carbon cost structurally exceeds the actual export revenue.
• Cement and fertilizer: Smaller in absolute terms today, but both sectors face default-value penalties and expanding compliance scope through 2030.

The Default-Value Penalty Ladder

The most consequential detail in the CBAM regulation is the default-value mechanism. Facilities that cannot provide verified, site-level emissions data must use EU-calculated country-level defaults. For Vietnam, those defaults are punitive:

• 2026: default values carry a 10% penalty
• 2027: penalty rises to 20%
• 2028 onward: penalty reaches 30%

For hot-rolled coil, a Vietnamese producer relying on defaults would face carbon costs of EUR 336 per tonne by 2030, compared with EUR 274 for a Thai counterpart using the same default pathway. That 22% gap reflects data transparency, not actual emissions performance. For a single 10,000-tonne shipment, the difference amounts to EUR 616,000 in additional margin loss.

By contrast, Hoa Phat Group — which has obtained BSI-verified emissions data showing an actual intensity of 1.91 tCO₂e/t against Vietnam's default of 2.35 — generates an estimated €40 million annual compliance advantage over competitors who have not invested in verification. This is the structural bifurcation that CBAM creates: data-capable exporters gain market share; default-reliant exporters lose it.

The Procurement Pivot

For aluminum fabricators, the commercial remedy lies entirely in procurement. Switching from Chinese primary aluminum to a verified low-carbon supplier such as Emirates Global Aluminium (EGA), with a verified intensity of 7.57 tCO₂e/t, yields an estimated 7:1 return on investment when carbon costs are factored in. The barrier is not price — it is establishing the ISO 14067 supply chain verification infrastructure that EU customs now require.

Textile and agricultural exporters, while not yet directly covered by CBAM, face indirect pressure through the Ecodesign for Sustainable Products Regulation and the EU's Farm to Fork strategy. European buyers are already requesting emissions documentation from Vietnamese suppliers across categories. Carbon data is becoming a standard export document, not a niche ESG add-on.

Vietnam's Institutional Gap

Thailand entered 2025 with a domestic carbon tax and an integrated MRV (measurement, reporting, verification) system. Vietnam has neither. The absence of a credible domestic carbon pricing mechanism means Vietnamese exporters cannot claim deductions for carbon costs already paid at home. Every euro of CBAM liability flows directly to Brussels, not to the Vietnamese treasury.

This creates a fiscal and political incentive for Vietnam to accelerate its own carbon-market development. The government's Carbon Market Development Project plans pilot operation of a carbon trading floor in 2025 and official operation in 2028. But that timeline leaves a three-year institutional vacuum during which Vietnamese exporters will pay carbon costs to the EU without offset capability.

What Exporters Should Do Now

The third quarter of 2026 is the first full reporting period under financial CBAM. Exporters who begin data collection today can still avoid the 2027 penalty escalation. Those who wait until their EU customers demand documentation will find themselves at the back of a long queue for verification auditors.

A practical 90-day readiness plan looks like this:

1. Map your emissions footprint. Identify every production step that contributes to the carbon intensity of EU-bound products. Engage a third-party verifier accredited under ISO 14064 or equivalent standards.
2. Audit your supply chain inputs. For aluminum, steel, and cement exporters, the embedded emissions of raw materials often exceed direct process emissions. Document the origin and intensity of every major input.
3. Model the default vs. verified cost gap. Calculate your exposure under both scenarios. This number belongs in your pricing negotiations with EU importers.
4. Establish an MRV system. Even if Vietnam's domestic carbon market is not yet operational, a company-level emissions tracking system creates defensible data and positions you for future compliance.

The Broader Implications

CBAM is the first of several border carbon adjustments. The United Kingdom launches its own CBAM in January 2027. Australia's 2026 carbon-leakage review has recommended that a border carbon adjustment be considered. The US Clean Competition Act, if passed, would apply to a wider range of goods than the EU mechanism. Exporters who build carbon-data capability now will face a multi-jurisdiction compliance landscape from a position of strength. Those who treat CBAM as a single-market problem will find themselves repeatedly behind.

For Vietnam, the policy question is equally urgent. The country has committed to net-zero emissions by 2050. CBAM accelerates that timeline by imposing external carbon costs on Vietnam's most carbon-intensive export sectors. The revenue from a domestic carbon pricing system — whether a tax or a cap-and-trade market — would stay in Vietnam, fund industrial decarbonization, and reduce CBAM liability at the border. The current arrangement sends that revenue to the EU treasury instead.

The firms that understand this dynamic first will shape the next decade of Vietnamese export competitiveness. The firms that ignore it will discover that carbon data has become a cost of market access — and that the price of catching up rises every year.