Cement is CBAM’s concentrated sector. Where steel spreads the compliance burden across hundreds of Irish fabricators and merchants, cement and clinker move in bulk through a small number of importers — which means each one carries an outsized share of the exposure, and each declaration error is measured in ship-loads, not pallets. Cement is also the sector playing by the stricter rulebook: it is one of only two CBAM categories where indirect emissions count towards the certificate obligation from day one of the definitive regime.
CBAM covers cement clinker, Portland cement, aluminous cement and other hydraulic cements under CN heading 2523, plus calcined kaolinic clays under CN 2507 00 80. Unlike steel and aluminium, cement’s certificate obligation includes both direct and indirect emissions — the CO2 from calcination and kiln fuel, and the electricity used in production. Most embedded emissions trace back to clinker, so the clinker content of what you import is the variable that sets your bill. First declarations for 2026 imports are due by 30 September 2027.
Key Takeaways
- Cement (with fertilisers) is an exception to CBAM’s direct-only rule — indirect electricity emissions are part of the obligation, so a producer’s power supply affects your bill
- Scope is CN 2523 plus calcined kaolinic clays (2507 00 80) — an inclusion that catches some importers of cementitious materials off guard
- Roughly 60% of clinker’s CO2 comes from limestone calcination — chemistry no fuel switch can remove — so low-clinker blends are the main cost lever
- Per-tonne CBAM costs are modest next to steel or aluminium, but cement volumes make total exposures among the largest in the regime
- Cement importers face CBAM and the new Construction Products Regulation simultaneously — running them as separate projects duplicates work and multiplies error risk
The Sector Where Electricity Counts
The CBAM Regulation splits its goods into two camps. Iron, steel, aluminium and hydrogen sit in Annex II: only their direct production emissions attract certificates. Cement and fertilisers do not — their embedded emissions are calculated to include indirect emissions from electricity as well.
For a cement importer this has a practical consequence the other sectors escape: you need your producer’s electricity consumption and its emissions treatment, calculated under the EU’s prescribed methodology for grid factors and any on-site generation, on top of everything else. Grinding, in particular, is electricity-hungry. Two plants with identical kilns can hand you different CBAM obligations purely because one grinds with coal-fired power and the other doesn’t. That is a data category most cement supply agreements never contemplated, and retrofitting it into supplier relationships is slower than importers expect — start early, or talk to us about running the supplier engagement for you.
For the mechanism’s overall architecture — declarants, certificates, the ETS price link — see what is CBAM.
Scope: One Heading and One Surprise
Cement’s product scope is the tidiest in CBAM — essentially CN heading 2523:
- 2523 10 — cement clinker
- 2523 21 / 2523 29 — white and other Portland cement
- 2523 30 — aluminous cement
- 2523 90 — other hydraulic cements
The surprise is CN 2507 00 80 — calcined kaolinic clays, listed in the cement aggregation despite not being cement at all. If you import calcined clays as a supplementary cementitious material, you are in scope and many of your peers don’t know they are.
Downstream products — ready-mixed concrete, precast elements, concrete blocks — are not covered as of July 2026. Import the cement and you carry the obligation; import the finished concrete product and, for now, you don’t. That asymmetry is commercially significant and worth watching: the Commission’s December 2025 proposal on downstream scope extension signals the direction of travel, even though its current focus is elsewhere.
Clinker Is the Bill
Cement CBAM economics reduce to one ratio. Clinker — limestone calcined at extreme temperature — is where nearly all the CO2 is created, from two sources: the calcination reaction itself, which releases CO2 from the stone and accounts for roughly 60% of emissions, and the kiln fuel burned to drive it. The calcination share is chemically irreducible; no alternative fuel or efficiency programme touches it.
Finished cements dilute clinker with slag, fly ash and other supplementary materials, so embedded emissions track clinker content almost linearly:
| Product | Indicative clinker share | Emissions profile |
|---|---|---|
| Clinker (2523 10) | 100% | Highest — undiluted |
| Portland cement (CEM I) | ~95% | Close to clinker |
| Blended cements (CEM II) | 65–94% | Materially lower |
| Slag cements (CEM III) | 5–64% | Lowest in scope |
This makes the declared clinker ratio the most financially consequential number in your CBAM declaration — and one that has to be evidenced from installation-level production data, not read off a bag or a product datasheet. Verifying it, and correctly attributing the clinker’s own precursor emissions when cement is ground in a different country than the clinker was burned, is exactly the kind of methodology work where importers should not be improvising.
Irish Demand, Import Volumes and the Threshold That Doesn’t Help
Ireland’s construction pipeline — housing targets, infrastructure programmes, data centres — keeps cementitious demand high, and imports fill the gap domestic production doesn’t. The regime’s 50-tonne annual exemption threshold is irrelevant at cement scale: a single bulk delivery clears it. Every meaningful cement importer needs authorised CBAM declarant status, and needed to have applied for it — the grace window for applications closed on 31 March 2026. Our CBAM registration guide covers the process if your authorisation is still outstanding.
On cost: per-tonne certificate exposure for cement is modest beside steel or aluminium, but the tonnages are not. The phase-in softens the early years — only 2.5% of embedded emissions require certificates for 2026 imports, reaching 100% by 2034 as EU producers’ free allocation winds down — and certificate sales open on 1 February 2027, ahead of the first declaration deadline of 30 September 2027. Where your producer already pays a carbon price at home, that price can in principle be deducted from your obligation, and from 2027 the Commission will publish default carbon-price references for third-country regimes to support such claims. The evidence standards are strict; casual deduction claims are enforcement bait. See our guides to CBAM certificates and the definitive period for the mechanics.
One Supply Chain, Two Regulations
Cement importers are absorbing CBAM at the same time as the recast Construction Products Regulation reshapes CE marking and product documentation — including environmental performance data such as Environmental Product Declarations (EPDs) that overlaps with, but does not map onto, CBAM’s emissions methodology. The same suppliers, the same products, two different data specifications. Run as separate projects, they duplicate supplier requests and produce inconsistent numbers that a regulator can put side by side. Run together, one supplier-data programme feeds both. That integration is a Clearscope specialty precisely because so few advisors work both frameworks.
How Clearscope Supports Cement Importers
Cement CBAM rewards depth over breadth: one heading, a handful of products, and everything turning on production chemistry, clinker ratios and electricity data. Through our CBAM compliance service we provide:
- Scope and classification — including the 2507 00 80 calcined-clay question and blended-cement boundary cases
- Emissions quantification — calcination, fuel and indirect electricity emissions under the correct EU methodology, with clinker ratios evidenced to declaration standard
- Supplier data programmes — installation-level engagement with producers, built to serve CBAM and CPR from a single data set
- Exposure and deduction planning — phase-in modelling to 2034 and third-country carbon-price deduction claims that survive scrutiny
Importing steel or aluminium too? The rules differ sector by sector — see our guides for steel importers and aluminium importers, or contact us for a cement-specific assessment.
Frequently Asked Questions
Why does cement include indirect emissions when steel and aluminium don't?
The regulation lists steel, aluminium and hydrogen in Annex II, limiting their obligation to direct emissions for now. Cement and fertilisers were kept outside that list, so their embedded emissions include electricity from the start of the definitive regime. Practically, it means cement importers need producer electricity data that other CBAM importers can currently ignore.
Are calcined clays really covered by CBAM?
Yes — calcined kaolinic clays under CN 2507 00 80 are listed within CBAM's cement scope. Non-calcined clays are not. Importers of supplementary cementitious materials should check classifications carefully, because this inclusion is widely missed.
Is imported ready-mixed concrete or precast covered?
Not as of July 2026 — CBAM covers cement and clinker, not downstream concrete products. The EU is actively reviewing downstream scope extensions, so structuring supply around this boundary is a decision to revisit, not a permanent arbitrage.
Can I reduce my CBAM bill if my supplier already pays a carbon price?
In principle yes — carbon prices effectively paid in the country of production are deductible from your obligation, and from 2027 the Commission will publish default carbon-price references for third-country schemes. The documentary requirements are demanding, and unsupported deduction claims create enforcement exposure rather than savings.