Carbon Stopped Being a Cost and Became a Price: EUR 48 on Every Tonne of Cement

Three thousand eight hundred million tonnes of cement a year, at roughly 0.60 tonnes of CO₂ per tonne of cement, is 2,280 million tonnes of CO₂. Price that at EUR 80 a tonne and the carbon embedded in a tonne of cement is worth EUR 48. Against a German ex-works cement price of EUR 113.98, that is 42.11 per cent of the price of the product.

That number — 42 per cent — is not a forecast. It is what the arithmetic says when carbon is charged at full auction value with no free allocation. It is also the reason the distinction between a cost and a price has stopped being academic. A cost is something a producer absorbs and manages. A price is something a producer passes on, and which reorganises the competitive order of an industry while it happens.

The regime changed on 1 January 2026

The Carbon Border Adjustment Mechanism, Regulation (EU) 2023/956, moved into its definitive regime on 1 January 2026. Cement is one of the six sectors in scope, alongside iron and steel, aluminium, fertilisers, electricity and hydrogen.

Under the definitive regime, as the Commission sets out on its own implementation page, importers above a single mass-based threshold of 50 tonnes of CBAM goods must apply for authorised declarant status, buy CBAM certificates from their national competent authority, declare embedded emissions annually and surrender the corresponding certificates. The certificate price is calculated from the auction price of EU Emissions Trading System allowances — a quarterly average in 2026 and a weekly average from 2027. Where a carbon price has already been paid in production, that amount is deductible.

Two details in that mechanism matter more than the headline. The quarterly-then-weekly step is a deliberate convergence: the instrument begins as an average and becomes a live price, which transfers price risk to the importer over two years. And the deduction for carbon already paid means the mechanism does not simply penalise imports — it equalises, which is precisely why it survived the WTO compatibility question that was supposed to kill it.

But the more consequential half of CBAM is not at the border. It is inside the EU, where free allocation is being withdrawn. CBAM is designed to replace that protection exactly as it is removed, which means an EU producer’s effective carbon cost converges on the full allowance price whether they export, sell domestically, or do neither.

What 42 per cent does to a price-led market

Cement’s growth is already almost entirely price. Output runs 3,900 to 3,800 million tonnes, with 2024 revised down from 4,000, at 0.37 per cent volume growth. Value grows 3.03 per cent, and 86.3 per cent of that growth is price.

Set the two facts against each other and the strategic question becomes sharp. If 86 per cent of the industry’s value growth comes from repricing, and if at full auction value carbon accounts for 42 per cent of the price of the product, then the carbon mechanism and the price mechanism are not two things. They are the same thing viewed from two directions. The industry’s growth model and its decarbonisation cost are denominated in the same currency and driven by the same instrument.

Which produces a conclusion that cuts against the usual framing of climate policy as a margin tax. At EUR 80 a tonne of CO₂, carbon is not a cost line to be managed down by a few per cent of opex. It is the largest single determinant of the delivered price of the product, and it is set by an auction that no cement company controls.

The competitive spread is smaller than the headline — and it is the headline that matters

Here is where precision matters, and where a loose claim is worth correcting before it gets repeated.

A producer at 512 kg of CO₂ per tonne of cementitious product against one at 600 kg is 14.67 per cent lower in carbon intensity. At EUR 80 a tonne, the difference is 88 kg × EUR 80 = EUR 7.04 per tonne of cement, which is 6.18 per cent of the EUR 113.98 German price.

So the intensity gap is real and durable, but on its own it is a margin-sized advantage, not a structural one. The 14.67 per cent figure describes carbon performance. The EUR 7.04 describes the commercial prize at today’s allowance price. Confusing the two — quoting the intensity gap as though it were a cost advantage — overstates the winner’s position by roughly a factor of two and a half.

The structural point sits elsewhere. A producer at 600 kg pays the full 42 per cent embedded carbon exposure on every tonne, and a producer at 512 kg pays 36 per cent. Both are exposed to an auction price. Neither can hedge it beyond the free allocation they no longer have. That is what makes carbon a price: it is a common input cost with a public, volatile, externally set level, and it enters the cost curve of every plant in the same currency.

Why this is different from every previous input shock

Coal, electricity and freight all spiked and all came back down. Three properties distinguish carbon.

It is designed to rise. The cap tightens on a published schedule. A cost with a legislated upward path is not a cycle; it is a trend, and capital allocation treats it differently.

It is border-adjusted. A domestic energy shock hits everyone inside the bloc. CBAM extends the same price to importers, which removes the option of relocating the marginal tonne — the classic response to a regional cost increase.

It is auditable per tonne. Embedded emissions are declared, verified and priced per tonne of product. That makes decarbonisation a product attribute with a number attached, in a way that efficiency in kiln fuel never was.

The practical consequence for procurement is the one worth carrying away: a cement buyer in Europe is now buying carbon with a cement margin attached, and the certificate price is a forward curve they should be reading the way they read the coal curve a decade ago.

The limits of this arithmetic

Two, stated plainly. The 42 per cent assumes full auction value and zero free allocation; the transition is phased, so the real number in 2026 sits below it and converges upward. And the 0.60 tonnes of CO₂ per tonne of cement is an industry-level intensity, not every plant’s — a producer already at 512 kg faces a materially different number. The direction and the order of magnitude are what the model supports; the exact percentage in any given year depends on the phase-down schedule and the auction clearing price, both of which move.

About the method

This analysis combines the cost, product-mix and price series in the Global Cement Market Report, 2026–2033 with the operative legislative texts and the Commission’s implementation guidance, weighted approximately 70 per cent secondary and 30 per cent primary research. The secondary layer is the CBAM regulation and its definitive-regime rules, the EU Emissions Trading System phase-down, GCCA activity and emissions reporting, USGS statistics and producer disclosures. The primary layer is structured interviews and open-ended conversations with procurement leads, sustainability directors and plant commercial managers on how much of the carbon cost has actually been passed through versus absorbed. Every figure above — 2,280 million tonnes of CO₂, EUR 48, 42.11 per cent, 14.67 per cent, EUR 7.04, 6.18 per cent — was produced with a calculation tool from the underlying series. No third-party market-research estimate is used anywhere in this piece.

Further reading

• Global Cement Market Report, 2026–2033 — the cost curve, product mix and 86.3 per cent price decomposition behind this piece.
• Global Ready-Mix Concrete Market, 2026–2033 — where cement is only 18.6 to 36.8 per cent of the price of the concrete it becomes.
• China’s Register Is the Ceiling — why output is now both a capacity denominator and a carbon cost base.
• Regulation (EU) 2023/956 (CBAM) — the operative text of the mechanism.