The EU carbon border charge falls on your EU buyer, not on you — but your buyer cannot file without your emissions data. Check whether your goods are in scope, whether your buyer clears the 50-tonne threshold, and what verified data to send before the first declaration on September 30, 2027.
Applies in: across Canada
The European Union's Carbon Border Adjustment Mechanism, CBAM, is not a tax on you. It is a charge on goods imported into the EU, paid by the EU importer through certificates priced against the EU Emissions Trading System. Your exposure as a Canadian seller is indirect but real: your buyer cannot complete its filing without emissions data that only you and your installation can supply, and if that data never arrives, your goods are priced on default values that take no account of how clean your production actually is.
The definitive regime applies from January 1, 2026. The transitional period, which ran from October 2023 to the end of 2025 and required reporting without any financial adjustment, is over. The first year of imports under the definitive regime is 2026, and the first declaration and certificate surrender for those imports fall due on September 30, 2027. This guide is written for a small exporter: one or a few EU buyers, no compliance department, goods in one of the covered sectors. It covers process and paperwork only. It gives no advice on whether a particular shipment is commercially worth making, and it states no price for certificates, because the certificate price moves with EU allowance auction prices and any figure quoted here would be stale on arrival.
This guide was grounded on the European Commission's CBAM pages and Regulation (EU) 2025/2083 on October 29, 2026. Recheck those pages before you act, and recheck them again after the Canada-EU summit on October 30, 2026: summit deliverables may change the practical position for Canadian exporters, and nothing about them is stated here because none had been published when this guide was written. The recheck date for the compliance cycle itself is September 30, 2027.
CBAM applies to imports of selected goods in six carbon-intensive sectors: cement, iron and steel, aluminium, fertilisers, electricity, and hydrogen. It does not apply to everything you might ship to Europe, and it does not apply to services. The first check is therefore a classification check, not an emissions check: find your goods on the Commission's sector pages and confirm the goods are among the listed CBAM goods for their sector, using the customs classification your buyer uses for the import.
Do this check per product, not per company. A business that ships aluminium extrusions and also ships finished goods made mostly of other materials may find that only some lines are CBAM goods. A business whose entire catalogue sits outside the six sectors has no CBAM work to do under this guide, whatever its buyer says. If the classification is genuinely unclear, ask your buyer which customs code they will declare and check that code against the sector pages before you agree to supply emissions data for it. Supplying data for goods that are out of scope costs time; failing to supply it for goods that are in scope costs your buyer a default-valued filing.
The single most useful question a small exporter can ask is not "what do you need from me?" but "how many tonnes of CBAM goods will you import this calendar year, in total, from every seller?" The answer decides whether CBAM obligations apply to that buyer at all.
An EU importer, or its indirect customs representative, that imports more than the single mass-based threshold of 50 tonnes of CBAM goods into the EU in a calendar year must apply for the status of authorised CBAM declarant. The threshold is cumulative across iron and steel, aluminium, fertilisers, and cement, and it counts per importer, not per shipment and not per supplier. If the importer's total does not exceed 50 tonnes in the calendar year, that importer is exempt from CBAM obligations for that year. If the importer crosses the threshold during the year, the obligations apply to all of the importer's CBAM imports for that whole year, including shipments made before the crossing, and the importer must obtain authorised declarant status and submit a declaration and surrender certificates for all of those emissions.
Two edge cases matter for small sellers. First, splitting a shipment into smaller consignments does not create a new threshold: the count is per importer per year, and the regulation was written to remove the circumvention risk of artificial splitting. Second, electricity and hydrogen imports are not included under the de minimis exemption, because their quantities, trade patterns, and emission intensities differ too much from the goods sectors for a mass threshold to work. A small hydrogen shipment is therefore not automatically exempt in the way a small steel shipment to a sub-threshold buyer is.
Get the buyer's position in writing: their expected annual CBAM tonnage, whether they hold authorised declarant status or have applied for it, and which national competent authority they applied through. You cannot work this out from your own order book, because your buyer's total includes every other seller's goods. If the buyer is under the threshold this year but growing, agree now what happens when they cross it: who supplies what data, and by when.
From January 1, 2026, CBAM goods above the threshold may only be imported by an authorised CBAM declarant. Your buyer, or its indirect customs representative acting as declarant, applies for that status through the Authorisation Management Module of the CBAM Registry, to the national competent authority of the EU country where the importer is established. Customs validation of CBAM authorisations runs before release for free circulation, so a buyer without the status, or without a pending application reference where the rules allow one, can find goods held at the border. That is the buyer's problem to solve, not yours — but it becomes your problem if you ship against a purchase order from a buyer who cannot clear the goods.
Ask for the buyer's CBAM account number or application reference number before the first definitive-regime shipment, and record it against the order. An authorised declarant may delegate the submission of its CBAM declaration to a third party that holds an EORI number and is established in a Member State, but the declarant remains responsible for the declaration. A customs broker filing on the buyer's behalf does not move the legal obligation off the buyer, and it does not move the data obligation off you. If your buyer says its broker "handles CBAM," the correct reply is still: "Send me your data template and your deadline, and tell me who the declarant of record is."
Your buyer has two ways to report the embedded emissions in your goods: the Commission's default values, or your actual values. The choice is the buyer's filing choice, but the work behind it is yours, and the commercial consequence lands on your price competitiveness.
Default values are published by the Commission. They require no data from you and no verification. They also give you no credit for a cleaner-than-average installation. Actual values are the emissions of your specific installation, calculated under the CBAM methodology, and they count only when verified: if the importer chooses to report actual values, the producer in the third country must provide verified emissions data on the total embedded emissions. An unverified figure, however carefully calculated, is not an actual value for filing purposes.
For a small exporter, the decision rule is practical. If your installation's emissions are close to or above the sector average, verified actual values buy you little, and the verification cost may exceed any benefit; let the buyer file on defaults and spend your effort elsewhere. If your installation runs cleaner than the average — hydro-powered aluminium, efficient steelmaking, low-carbon cement — verified actual values are the mechanism that turns that advantage into a lower certificate count for your buyer, which is a real selling point in a negotiation. Either way, agree the choice explicitly, in the order paperwork, before production. A buyer that assumed defaults and a seller that assumed actual values will discover the mismatch in the month the declaration is due, when neither can fix it cheaply.
Embedded emissions are calculated at the level of the installation where the goods were produced, following the CBAM calculation methods. That sentence carries three practical consequences. First, the unit that matters is the plant, not the company: two plants owned by the same company can have different embedded-emissions figures for the same product, and the buyer files per installation. Second, the calculation follows the Commission's methodology for the sector, including precursor inputs where the methodology requires them — for some aluminium and steel goods, the emissions embedded in input materials drive most of the total, so a calculation that covers only the final production step is incomplete. Third, the methodology is set out in Commission guidance and implementing rules for operators outside the EU; use the current guidance for the definitive period, not the transitional-period reporting guidance from 2023 to 2025, which described a different, reporting-only exercise.
Start with the data you already keep: fuel and electricity consumption, production volumes by product type, and the origin and quantity of precursor materials. The Commission's guidance for installation operators outside the EU is written for exactly this job, and the communication template the Commission publishes gives the data fields an importer will ask for, with worked examples per sector. Build one data file per installation and per product type, keep the source records behind every figure, and keep them for at least four years: operators must keep a copy of the verification report and the records used to calculate embedded emissions for four years after the verification, and declarants keep carbon-price records until the end of the fourth year after the declaration year. A figure you cannot re-derive from records four years later is a figure a reviewer can unwind.
Verification is what separates a filing number from a sales claim. CBAM verification applies at installation level. The non-EU installation operator monitors and calculates embedded emissions under the CBAM methodology and gives the information to an accredited verifier. The verifier, accredited by a national accreditation body in an EU or EEA country, reviews the monitoring approach, the emissions calculations, and the supporting evidence, and issues a verification report that can be included in the CBAM declaration. The declarant then retrieves the actual verified emissions from the CBAM Registry and uses them to complete the declaration.
The timetable for verification is already running. National accreditation bodies began CBAM accreditation in April 2026, the first accredited verifiers were expected to receive accreditation around September 2026 and can register in the CBAM Registry from September 2026, verification work on 2026 data started in September 2026, and the first verification reports can be issued from January 2027. Book the verifier early. The verification queue ahead of the September 30, 2027 declaration is the predictable bottleneck in this whole process, and a small exporter that waits until 2027 to start will be competing for verifier time with every other operator that waited.
Sharing the verified data is a separate step from verifying it. The Registry's O3CI module lets an operator upload installation and emissions data once and share it with reporting declarants, instead of submitting the same data separately to each one, and it allows confidential treatment of business-sensitive data. The declarant retrieves the data through the Registry's emissions tab by searching the third-country installations registry, which works when the declarant has your EORI number — so share your EORI number with each buyer outside the Registry, as the Registry page instructs. If you prefer not to use O3CI, you can disclose the verification information directly to an authorised declarant, which is entitled to use it for its declaration. Either route ends in the same place: the buyer holds a verification report it can file, tied to your installation, not a number in an email thread.
This is the part of CBAM most often oversold to Canadian exporters, so it gets stated plainly. The regulation allows a reduction in the number of CBAM certificates to be surrendered to take account of a carbon price paid in a third country. That reduction is available only where the embedded emissions are determined on the basis of actual emissions, and only if the carbon price was effectively paid. Any rebate or other form of compensation available in that country that would have reduced the carbon price must be taken into account. The declarant must keep documentation demonstrating that the emissions were subject to a carbon price that was effectively paid, certified by a person independent of the declarant and of the third-country authorities, with that person's name and contact information on the documentation, plus evidence of the actual payment.
What that means for a Canadian facility is record-keeping, not a rebate. Keep the facility-level proof of the carbon price actually paid under the system that applied to your installation, whether a federal or a provincial industrial pricing system, including any rebates or compensation that reduced what was effectively paid. Do not convert that proof into a euro figure yourself, and do not quote a buyer a net CBAM cost that assumes a deduction. The conversion of a carbon price effectively paid into a certificate reduction is governed by implementing acts, and the Commission may, as from 2027, determine yearly default carbon prices for third countries where carbon pricing rules are in place, publish the methodology, and make those default prices available in the CBAM Registry. No Canada-specific default carbon price is published on the Commission pages checked for this guide. Until a default price for Canada exists, or an implementing act settles the conversion, the deduction is a mechanism in the course of being built, not a discount in hand. The honest sentence to put in a quote is: "Carbon price paid in Canada is documented and available to your verifier; no deduction is assumed in this price."
The certificate price is calculated from EU ETS allowance auction prices, expressed in euros per tonne of carbon dioxide emitted: a quarterly average in 2026, and a weekly average from 2027 onwards. Certificates are bought by the authorised declarant from the national competent authority in its country of establishment, with sales opening on February 1, 2027, on a common central platform. From 2027, the declarant must also hold, at the end of each quarter, certificates covering at least 50 percent of the embedded emissions in the goods imported since the start of the calendar year. That quarterly holding rule is why CBAM becomes a cash-flow item for your buyer during the year, not just a September settlement — and why a buyer may ask you to share data quarterly rather than once a year.
None of that tells you what your goods will cost your buyer, because the certificate count depends on verified or default emissions for your specific goods, and the price depends on the ETS price when certificates are bought. What you can settle, before the first shipment, is the allocation: who bears the certificate cost, who supplies emissions data and by what date each year, who pays for verification, what happens if verification is delayed or fails, and what happens if the buyer's tonnage crosses the 50-tonne threshold mid-year and the earlier shipments become declarable. Put the data duties in the same document as the price. A purchase order that is silent on CBAM data, signed in November, is how a small exporter ends up doing verification work at rush rates in August 2027 for a shipment that sailed in February.
For each installation and each product type, send one pack, and re-send it when anything in it changes:
Send the pack once, through the Registry where you use it, and keep a copy of exactly what was sent, with dates. If a buyer asks for the same data in a different template, fill in its template from the same pack rather than recalculating: two versions of the same figure, produced months apart, are how inconsistencies enter a declaration.
This guide carries no certificate price, no ETS price, no per-tonne cost estimate for any product, and no list of customs codes. Certificate prices move with EU allowance auctions and are published regularly by the Commission; any price printed here would mislead within weeks. It carries no Canadian carbon-price rate and no conversion of a Canadian price into a CBAM deduction, because the conversion mechanism for third-country carbon prices is not yet settled for Canada, as Step 7 explains. It carries no statement about what the Canada-EU summit on October 30, 2026, will deliver, because no deliverable had been published when it was written. And it carries no claim that any particular Canadian facility, sector, or province is exempt: the exemption in the regulation is the 50-tonne importer threshold and the linked-ETS jurisdictions, and Canada is not among the latter. If a page in the Sources list changes any of these points, that page governs and this guide should be read against it.
Your EU buyer pays, through the importer. Under the definitive regime that applies from January 1, 2026, only an authorised CBAM declarant — the EU importer, or its indirect customs representative — may import CBAM goods above the threshold, and that declarant buys and surrenders the CBAM certificates. You do not buy certificates and you do not file the declaration. Your part is the data: without verified embedded-emissions figures from the installation that produced the goods, your buyer must fall back on the Commission's default values, which may price your shipment higher than your real emissions would. Who bears the certificate cost in the end is a term of your sales contract, so settle it in writing before the first shipment, not after the first declaration.
It does not apply to that buyer for that calendar year, if the buyer's total stays at or under 50 tonnes. The threshold is a single mass-based threshold counted per importer, per calendar year, cumulatively across iron and steel, aluminium, fertilisers, and cement. It is not per shipment, not per seller, and not per product line. Two consequences follow. First, if the buyer crosses 50 tonnes partway through the year, the obligations apply to all of that buyer's CBAM imports for the whole year, including the earlier shipments. Second, a second buyer does not inherit the first buyer's threshold: each importer's own total counts. Electricity and hydrogen imports are not covered by this de minimis exemption at all, so do not assume a small hydrogen or electricity shipment is exempt. Ask each buyer for their running total and their declarant status in writing, and keep the answer with the order file.
You are not required to register in order to sell, but registration is how you share verified data once instead of sending it separately to every buyer. The Registry's module for operators of third-country installations, called O3CI, lets an installation operator upload installation and emissions data in one place, with confidential treatment for business-sensitive data. A declarant who has your EORI number can then retrieve that data from the Registry and populate its declaration from it. To become a registered operator you create an EU Login account with two-factor authentication, submit an access request through the O3CI portal, and complete an onboarding form with company details, a company registration certificate, proof of representation, and the authorised representative's identification. Separately, the Commission registers the operator and installation in the CBAM Registry on request, and that registration lasts five years. If you have only one EU buyer and that buyer is content to receive your data directly, registration is a convenience, not a precondition. If you sell to several buyers, it is the practical way to stop the same data request arriving five times.
Use actual values only when you can prove them. The importer may report emissions using default values published by the Commission, or actual values for the goods. Actual values require the producer in the third country — you, through your installation — to provide verified emissions data on the total embedded emissions, calculated under the CBAM methodology and checked by an accredited verifier. If you cannot produce verified data, your buyer files on defaults, and the shipment is priced on the default, not on your plant's real performance. That is the whole commercial point of doing the measurement work: a lower-carbon installation only gets credit for being lower-carbon when the figure is verified. Do not send an unverified spreadsheet and call it actual values. The verifier's report is what turns your number into a filing number, and the first verification reports for 2026 data can be issued from January 2027.
It may, but do not promise yourself — or your buyer — a deduction until the mechanism for Canada is settled. The regulation allows an authorised declarant to claim a reduction in the number of certificates to surrender to take account of a carbon price effectively paid in a third country, but only where the embedded emissions are determined on the basis of actual emissions. Any rebate or other compensation that reduced that carbon price must be taken into account, the evidence must be certified by a person independent of both the declarant and the third-country authorities, and the declarant must keep proof of actual payment plus the certified documentation until the end of the fourth year after the declaration year. Separately, the Commission may, as from 2027, determine yearly default carbon prices for third countries where carbon pricing rules are in place and publish the methodology for calculating them, and implementing acts will govern how a carbon price converts into a certificate reduction. No Canada-specific default carbon price is published on the Commission pages checked for this guide, and no conversion figure is stated here. Keep facility-level proof of whatever carbon price was actually paid under the system that applied to your installation, tell your buyer the proof exists, and let the buyer and its verifier work out what, if anything, can be claimed. A deduction that is not yet determined is not a discount you can quote.
Three dates matter for the first compliance cycle. The definitive regime applies from January 1, 2026, so 2026 imports are the first imports that carry a certificate obligation. CBAM certificate sales open on February 1, 2027, when Member States start selling certificates on a common central platform to authorised declarants. The first annual CBAM declaration, covering 2026 imports, and the surrender of the corresponding certificates are due by September 30, 2027, and the same September 30 date applies each year after that. From 2027, a declarant must also hold, at the end of each quarter, certificates covering at least 50 percent of the embedded emissions in the goods imported since the start of the calendar year. On the seller's side, the working deadline is earlier: verification of 2026 data starts in September 2026, with the first verification reports available from January 2027, so an installation that starts measuring in mid-2027 will be chasing a verifier queue it could have avoided. Recheck the Commission's CBAM pages after the Canada-EU summit on October 30, 2026, and again before September 30, 2027: this guide states no summit outcome, because none was published when it was written.