CBAM 2026: What Australian Exporters of Steel, Aluminium and Cement Now Owe Brussels

If you ship steel, aluminium, cement, fertiliser, hydrogen or electricity into the European Union, your customer there now has a new question for you, and you have until their first annual declaration in 2027 to answer it properly. How much carbon is embedded in every tonne you sent them in calendar year 2026?

The CBAM definitive period began on 1 January 2026. The transitional phase, where EU importers only had to file quarterly emissions reports, ended on 31 December 2025. From this year, importers must purchase and surrender CBAM certificates against the verified embedded emissions of every covered shipment. The penalty for missing certificates is €100 per excess tonne of CO2-equivalent. That cost flows back to you, the exporter, in one of three ways: lower prices, lost contracts, or a request for compliance-grade emissions data with verification.

For Australian producers preparing for this exact data request, the issue is rarely the calculation. It's that nobody on site has ever been asked for installation-level emissions intensity per product, verified by an accredited third party, in a format that maps to EU methodology. That requires a different system than what most exporters have for their NGER report.

What CBAM actually requires from a non-EU producer

The European Commission does not require Australian companies to register with CBAM directly. The compliance obligation sits with the EU importer. But the importer cannot complete their declaration without the embedded emissions data from your installation, and from 2026 onwards the regulation expects actual data, not default values.

Here is what an EU importer will ask you for, in priority order:

Direct emissions per tonne of product. This is the Scope 1 emissions from your installation, allocated to the specific CBAM good. For a steel mill, this is the CO2 from the blast furnace, coke ovens, sinter plant and the rest of the production route. For aluminium, it includes anode effects and PFC emissions from the smelter. For cement, it is the calcination emissions from the kiln plus the fuel combustion emissions. The methodology comes from Annex IV of the CBAM Regulation.

Indirect emissions per tonne of product. This is your purchased electricity allocated to the product, calculated using a CBAM-prescribed methodology. For Australian aluminium smelters in Queensland or Tasmania, the grid emission factor matters enormously. The same kilogram of aluminium produced in Tasmania looks very different to one produced from a coal-heavy grid.

Precursor emissions. If your product uses iron ore as input that has already been processed (for example, hot-rolled coil made from imported slab), you need the embedded emissions of those precursors too, and ideally from the upstream supplier.

Verification by an accredited third party. From 2026, the regulation expects actual installation-level data verified by a third party accredited under the EU framework. Self-declared numbers will not survive scrutiny once CBAM enters its enforcement years.

Where the data problem lives

Most Australian producers in the CBAM frame already have NGER data. They report tonnes of CO2-e per facility annually to the Clean Energy Regulator. CBAM is not the same shape of problem.

NGER reports facility-level totals by gas. CBAM needs product-level emissions intensity per tonne of specific CN code. A steel mill that makes both rebar and wire rod has to allocate emissions between those products using a defined methodology. A cement producer with multiple kiln lines and multiple cement types has to break out which clinker went into which finished product.

The second gap is granularity. NGER allows Method 1 default factors for many activities. CBAM, in the definitive period, expects measured or calculated installation-level data. Default factors are heavily penalised after a transition allowance, and the European Commission's CBAM guidance makes clear that the direction is toward actual data only.

The third gap is allocation. Production routes for steel and aluminium often share processes between multiple products. CBAM has prescribed allocation rules. NGER does not.

How this connects to AASB S2 and NGER

If you're an Australian exporter big enough to ship significant volume into the EU, you're almost certainly an NGER reporter, and from 1 July 2026 you're an ASRS Group 2 entity. That means CBAM data is not a separate workstream. It draws from the same source documents and meter data.

The trick is that the unit of analysis is different in each framework:

A single emissions data point, measured once at the meter or invoice, has to be allocated three different ways. If your team is doing this in spreadsheets, you've got a maintenance problem coming. We've written before about why spreadsheets stop scaling when frameworks multiply, and CBAM tips the balance for any producer with EU exposure.

The verification piece is harder than the calculation

This is where most Australian exporters get caught. Third-party verification under CBAM is not the same as NGER assurance. The verifier needs to trace every assumption back to source documents and walk the calculation methodology end-to-end. They will ask for:

• Production records by product, by line, by month
• Raw input quantities matched to production output
• Energy meter data at the level of the production unit, not the site
• Electricity contracts including any PPAs and the corresponding emission factor evidence
• Allocation calculations with the methodology documented
• Emission factor sources and version dates

If your evidence pack lives in a network drive of PDFs and a spreadsheet that someone updates manually, the verifier will spend weeks reconciling and your verification cost will reflect that. We built our document engine specifically because the gap between "we have the data somewhere" and "the data is in a verifier-ready audit trail" is where most companies bleed time and money.

The €100 per tonne penalty is not the whole story

The headline penalty for missing CBAM certificates is €100 per excess tonne. That sounds manageable until you do the maths on volumes.

A typical Australian aluminium smelter produces around 200,000 tonnes per year. If the European benchmark is 1.5 tCO2/tonne aluminium and your facility's verified intensity comes in at 5 tCO2/tonne (because of grid mix), that's 3.5 excess tonnes of CO2 per tonne of product. Across the EU-bound portion of your output, the cost of CBAM certificates becomes a structural drag on the deal.

The strategic answer is not "absorb the cost". It is "reduce the embedded intensity that gets charged in the first place". That requires a credible PPA, a renewable energy purchase backed by certificates the EU recognises, or process improvements you can document with verifiable data. None of those work without good emissions accounting underneath them.

What omnibus simplification means for smaller exporters

In late 2025 the European Commission introduced omnibus simplification provisions under Regulation (EU) 2025/2083. The most useful provision: importers whose total annual net imports of covered goods fall below 50 tonnes are fully exempt from CBAM obligations.

This will not help large Australian steel or aluminium exporters. It will help small specialty producers who ship occasional containers of niche product into the EU. If you're in this category, work with your importer to confirm the threshold applies before you invest in full CBAM data collection.

For everyone else, the threshold doesn't change anything. The data work has to happen.

What to do in the next 90 days

If you haven't started, start now. The first annual CBAM declaration covers calendar year 2026, and importers will be asking for data well before the September 2027 declaration deadline. Practical sequence:

1. Identify EU-bound product flows. Which CN codes, which volumes, which importers? Build a list with quarterly volume estimates.
2. Map data to product. Which meters, invoices, and operational records feed the emissions intensity for each CN code? This is the most common gap.
3. Document the methodology. Write down how you allocate emissions between co-produced products, which emission factors you use, and what version you're on.
4. Pre-engage a verifier. Accredited verifiers under the EU framework are limited in number. Get on their books early. Don't expect to engage one a month before declaration.
5. Run a dry-run calculation. Pick one product, one quarter, and produce a CBAM-format output. The exercise will surface every gap in your data.

The pattern that works for Australian exporters running this preparation is treating CBAM data as a downstream output of a clean, granular emissions ledger, not as a one-off calculation done in Excel each year. The same data discipline that prepares you for AASB S2 assurance prepares you for CBAM verification.

The bottom line

CBAM is not going away. The European Commission has signalled scope expansion to downstream steel and aluminium products, and the draft proposals released in late 2025 suggest the covered goods list will grow over the next two years. Australian exporters who treat CBAM as a passing nuisance will lose ground to those who treat it as a procurement-grade data discipline.

The producers who win this are the ones who can answer an EU customer's data request in days, not months, with verified numbers that hold up under audit. That is a system question, not a spreadsheet question.

If you're an Australian exporter with EU customers and you want to talk through what CBAM-ready data looks like for your installation, email us at hello@carbonly.ai or join the waitlist. We'll show you what the audit trail looks like, what your verifier will accept, and how the same data feeds your NGER and AASB S2 reporting at the same time.