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What is CBAM? The EU Carbon Border Tax Explained

RDRaahul Dutta12 August 20266 min read
How CBAM works: import covered goods, report embedded emissions, buy CBAM certificates, and surrender them once a year.

Two factories make the same steel beam.

One sits inside the EU. It pays for every tonne of carbon it emits. The other sits outside the EU. It pays nothing for its carbon and ships the beam in cheaper.

For years the second factory won on price, for a reason that had nothing to do with the steel.

CBAM exists to close that gap.

If you import steel, aluminium, cement, fertiliser, hydrogen, or electricity into the EU, this rule now reaches your shipments.

This guide covers what CBAM is, which goods it hits, who has to report, and the dates that actually apply in 2026 and 2027.

What is CBAM?

CBAM stands for the Carbon Border Adjustment Mechanism. It is an EU rule, Regulation (EU) 2023/956.

It puts a carbon price on certain goods when they are imported into the EU. The aim is simple: charge imported goods for their carbon the same way EU producers are already charged for theirs.

The problem it targets has a name: carbon leakage.

When carbon is expensive to emit inside the EU but free outside it, production just moves abroad. The emissions do not stop. They relocate.

CBAM answers that. The importer accounts for the carbon embedded in the goods, the carbon released while they were made, and pays a price for it at the border.

So, in one line: CBAM is a carbon price on imports, so a tonne of steel made abroad carries the same carbon cost as a tonne made in the EU.

Which goods does CBAM cover?

CBAM does not apply to everything. It starts with six carbon-heavy sectors:

  • Iron and steel
  • Aluminium
  • Cement
  • Fertilisers
  • Hydrogen
  • Electricity

Coverage is set by HS and CN codes, not product names.

So whether a specific bracket, bolt, or pipe is in scope comes down to its exact code. That makes classification the first real CBAM task. If you cannot put the right code on the line, you cannot tell whether you owe anything.

The scope is expected to widen to more sectors over time.

Who has to report?

The obligation falls on the importer of record. That is the party bringing the covered goods into the EU, or an indirect customs representative acting for them.

From the definitive period, an importer must hold the status of authorised CBAM declarant to bring these goods in at all.

There is now a size floor.

Under the 2025 simplification, importers whose covered goods total less than 50 tonnes of net mass per year are exempt from CBAM entirely. This single mass threshold replaced the old €150-per-shipment rule.

It takes most small importers out of scope, while still capturing almost all the emissions. Hydrogen and electricity do not get this exemption.

The dates that actually apply

CBAM runs in two phases, and the dates moved in late 2025. Older articles online are wrong. Here is the current picture.

  • 1 Oct 2023 to 31 Dec 2025 was the transitional period. Reporting only. Quarterly reports on embedded emissions, but no payment.
  • 1 January 2026 starts the definitive period. The financial obligation begins, and authorised-declarant status is required.
  • 8 October 2025 is when the CBAM Omnibus simplification was adopted, bringing the 50-tonne threshold and the timing changes below.
  • 1 February 2027 is when the sale of CBAM certificates begins. It was postponed from January 2026.
  • 30 September 2027 is when the first annual declaration, covering 2026 imports, is due.

Read those together and the shape is clear.

Your obligation starts on 1 January 2026. But you do not buy and surrender certificates for 2026 imports until 2027.

It is retroactive, not deferred. You are accountable for 2026 carbon. You just settle it the year after.

How the payment works

Once in the definitive period, it works like this.

You work out the embedded emissions in each shipment, using the producer's real data where you have it, or default values where you do not.

You buy CBAM certificates, each priced to track the EU carbon price, to cover those emissions.

Once a year, you submit a declaration and surrender enough certificates to match what you imported.

Where the exporter already paid a carbon price abroad, that can be deducted. The same tonne is not charged twice.

The hard part is rarely the certificate. It is getting real emissions data out of a foundry or cement works several tiers up your chain, in the right format, for every shipment.

How Bindu handles CBAM

That data chase is exactly where CBAM eats time. It is what Bindu takes off your desk.

Bindu is the trade-compliance OS, and CBAM is one of the rules it routes to.

Drop in your import documents. Bindu reads them into products, quantities, and origins, then classifies each line to its HS code.

Now you can see which goods are actually in CBAM scope, and which fall under the 50-tonne floor. No guessing.

For the goods in scope, Bindu opens the CBAM report and fills in what it knows. It keeps the emissions evidence from your suppliers attached to the right shipment, ready for audit.

The blank quarterly form and the copying between documents: gone. The decision on what you owe stays yours to confirm.

If you also handle the deforestation rule, it sits in the same place. Both are just trade compliance on the same shipments. See how it works.

FAQ

What is CBAM in simple terms? CBAM is a carbon price the EU charges on certain imported goods, like steel and aluminium, so imports carry the same carbon cost as goods made inside the EU. The importer reports the emissions embedded in the goods and, from 2027, buys certificates to cover them.

Which products are covered by CBAM? Iron and steel, aluminium, cement, fertilisers, hydrogen, and electricity, defined by their HS and CN codes. Scope is expected to expand to further sectors.

When does CBAM start charging money? The definitive period begins on 1 January 2026. Certificate sales begin on 1 February 2027, and the first annual declaration, covering 2026 imports, is due by 30 September 2027.

Who is exempt from CBAM? Importers whose covered goods total less than 50 tonnes of net mass per year are exempt, following the 2025 Omnibus simplification. Hydrogen and electricity are excluded from this exemption.

What is the difference between CBAM and EUDR? Both add a filing before goods move, but they target different things. CBAM prices the carbon in carbon-heavy imports. EUDR proves commodities like coffee and timber are deforestation-free. Many importers now face both.