The entire CBAM system rests on a single number: the emissions embedded in your product. The cost, the paperwork, the negotiations with buyers – everything flows from that one figure. So if you understand how it is calculated, you understand the heart of CBAM. This guide walks through the calculation step by step, in plain language, with a worked example, so you can see exactly where your numbers come from and where you can influence them.
What “embedded emissions” really means?
Embedded emissions are all the carbon dioxide released in the process of making your product. They fall into two main groups. Direct emissions come from fuel you burn on-site – the coal, gas or oil feeding your furnaces, boilers and kilns. Indirect emissions come from the electricity you buy from the grid; you do not burn the fuel yourself, but a power station does on your behalf, so those emissions still belong to your product.
For some products, a third element matters: the emissions embedded in precursors – the input materials you bought to make your product. If you produce fasteners from purchased steel, the carbon in that steel forms part of your fastener’s footprint. The calculation, then, is about capturing the full carbon story of your product, not just what happens inside your own four walls.
Step 1: Identify and measure your emission sources
The first step is to add up how much fuel and electricity your facility uses over a defined period – usually a year. You gather this from fuel purchase invoices, consumption logs and electricity bills. If your plant makes intermediate materials that feed into the final product, those are counted too. The goal is a complete, honest picture of energy going into production.
Step 2: Convert energy use into carbon
Raw fuel and electricity figures are not emissions yet. To convert them, you multiply each by a standard emission factor – a number that tells you how much carbon dioxide each unit of fuel or electricity produces. Burn a tonne of a particular fuel, and the factor tells you the carbon released. Use a unit of grid electricity, and a grid emission factor tells you the associated carbon. Add these up and you have your total emissions for the period.
Step 3: Divide by how much you produced
Next, you divide total emissions by the amount of product made in the same period. This gives emissions per tonne of product – the key intensity figure CBAM cares about. For example, if your plant released 20,000 tonnes of carbon dioxide while making 10,000 tonnes of steel, your embedded emissions are 2 tonnes of carbon per tonne of steel.
Step 4: Multiply by the quantity exported
Finally, that per-tonne figure is multiplied by the quantity actually shipped to the EU. If you export 500 tonnes of that steel, the embedded emissions attached to the shipment are 500 multiplied by 2, which is 1,000 tonnes of carbon dioxide. This is the number your EU importer reports and, from 2027, pays for through CBAM certificates.
A full worked example
Let us put it together. Suppose your plant used fuel and electricity that, once converted, produced 24,000 tonnes of carbon dioxide in a year, and you made 12,000 tonnes of aluminium products. Your intensity is 24,000 divided by 12,000, which is 2 tonnes of carbon per tonne of product. If a European buyer orders 300 tonnes, the embedded emissions on that order are 600 tonnes of carbon dioxide. If the effective carbon price were, say, 70 euros per tonne, the rough CBAM cost on that shipment would be around 42,000 euros. Now imagine you cut your intensity to 1.6 through efficiency and cleaner power: the same order carries 480 tonnes of carbon and roughly 33,600 euros – a saving of over 8,000 euros on a single shipment, purely from a lower footprint.
Why cleaner production directly saves money
That example reveals the most important point. Because the cost is tied to emissions per tonne, every improvement in your process – more efficient furnaces, better fuel, cleaner electricity, less waste – lowers the number and therefore lowers the CBAM cost your buyer faces. The calculation is not just an accounting chore; it is effectively a map showing where reducing emissions turns directly into a price advantage. For Indian producers, where grid electricity is often the biggest contributor, sourcing renewable power can be one of the most powerful levers of all.
Direct vs. indirect: which counts?
A practical question exporters ask is whether they must count grid electricity (indirect emissions) or only their own fuel (direct emissions). The answer depends on the product and the specific rules for that sector. For several covered goods, indirect emissions do count – which is exactly why electricity-heavy products like aluminium are so exposed. The safe approach is to measure both your direct and indirect emissions, so you have the full picture regardless of how the rules apply to your product.
Frequently asked questions
What are embedded emissions in CBAM?
They are the total carbon dioxide released while producing a good, including direct emissions from on-site fuel, indirect emissions from purchased electricity, and often the emissions in input materials (precursors).
How is the CBAM emissions figure for a shipment calculated?
You calculate emissions per tonne of product (total emissions divided by output), then multiply by the quantity exported. That gives the embedded emissions attached to the shipment.
Does grid electricity count toward CBAM emissions?
For several covered products, yes – indirect emissions from purchased electricity are included. This is why products made with coal-based power tend to have higher CBAM costs.
The bottom line
CBAM calculation comes down to a clear logic: measure your carbon, convert it with emission factors, divide by output, and multiply by what you export. Master this and you not only understand CBAM – you can see exactly where reducing emissions turns into money saved and orders protected.
