CBAM De Minimis Threshold: Exemptions and 50-Tonne Rule Explained

The CBAM de minimis threshold determines whether your imports fall below the exemption limit for reporting and certificate purchasing. Understanding this rule can save you significant compliance overhead — but it comes with important caveats that many importers overlook.

What Is the CBAM De Minimis Threshold?

The CBAM de minimis threshold is an exemption rule that allows importers to skip CBAM reporting obligations if their total import volume stays below a specific limit. The concept comes from the legal principle de minimis non curat lex — "the law does not concern itself with trifles."

In practice, this means small-volume importers may not need to comply with the full CBAM reporting framework, provided their cumulative imports remain under the threshold.

Current Threshold Value

Under Regulation (EU) 2025/2083, which entered into force on 20 October 2025, the de minimis threshold is set at 50 tonnes of net mass per calendar year — a mass-based measure, not an emissions-based one.

Detail	Value
Threshold limit	50 tonnes net mass per year
Calculation basis	Total mass of all CBAM goods imported per legal entity
Applies to	Iron & steel, aluminium, cement, fertilisers
Excluded sectors	Electricity, hydrogen
Review period	Annual (Commission may adjust if trade patterns change)

This means an importer whose combined CBAM-covered imports total less than 50 tonnes of net mass in a calendar year is exempt from CBAM reporting and certificate purchasing for that year.

How the Threshold Is Calculated

The 50-tonne limit applies to the total net mass of all your CBAM goods combined, not per product or per shipment. Here is how to determine if you qualify:

1. Identify all your imported products that fall under CBAM-covered CN codes
2. Sum the net mass in tonnes for each shipment across the calendar year
3. If the total is below 50 tonnes, you fall under the de minimis threshold

Example: An aluminium importer bringing in 40 tonnes of extruded profiles (CN 7604) falls under the threshold. The same importer with 60 tonnes does not — and crucially, all 60 tonnes become subject to full CBAM obligations for the entire year, not just the portion above 50 tonnes.

Which Sectors Are Covered?

Not all CBAM sectors are eligible for the de minimis exemption. This distinction is critical:

Eligible for De Minimis Exemption

Sector	CN Codes	Applies?
Iron & steel	CN 7201–7312	Yes
Aluminium	CN 7601–7609	Yes
Cement	CN 2523	Yes
Fertilisers	CN 2808–3105	Yes

NOT Eligible for De Minimis Exemption

Electricity (CN 2716) and hydrogen (CN 2804 10) are excluded from the de minimis threshold entirely. Importers of these products must comply with full CBAM reporting regardless of volume.

Reporting Frequency: Now Annual

Under the simplified regime, CBAM declarations are annual, not quarterly. The deadline for submitting your CBAM declaration for 2026 imports is 30 September 2027.

Note: The quarterly requirement that previously applied during the transitional phase no longer applies in the same form. Declarants must hold certificates equal to at least 50% of embedded emissions at the end of each quarter — down from the previous 80% requirement.

Practical Implications for Importers

1. Small Importers May Be Exempt If you import small volumes of iron & steel, aluminium, cement, or fertilisers and your combined net mass stays under 50 tonnes per year, you do not need to register as a CBAM declarant, submit annual declarations, or purchase CBAM certificates.

2. The Threshold Is Per Year, Not Per Shipment The 50-tonne limit applies to your annual total across all eligible sectors. If you exceed it at any point in the year, full CBAM obligations apply retroactively from 1 January of that year.

3. Growth Can Trigger Obligations If your import volumes grow and push you over the threshold mid-year, you become liable for CBAM compliance for the entire year — not just from the point of exceedance. Penalties for non-compliance can reach three to five times the standard certificate rate.

4. Documentation Still Recommended Even if you qualify for the de minimis exemption, maintaining records of your import volumes is advisable. National competent authorities may request evidence that you correctly applied the exemption.

5. Monitor Annual Reviews The Commission may adjust the 50-tonne threshold annually if trade patterns or emission intensities change significantly. Stay informed about regulatory updates.

CBAM De Minimis vs Other Exemptions

Exemption Type	Threshold	Scope
De minimis	50 tonnes net mass/year	Small importers of eligible sectors
Free allocation	Benchmark-based	All sectors, phases out 2026–2034
Third-country carbon price	Varies	Deduction for carbon price already paid
Offshore electricity/hydrogen	Geographic	EEA continental shelf/EEZ production

Common Questions

Does the threshold apply per importing company or per legal entity? Per legal entity registered for CBAM (each with its own EORI number). Subsidiaries within the same group cannot pool their imports to stay under the threshold.

What if I import both steel and aluminium? Both are eligible for the de minimis exemption. Add the net mass of your steel and aluminium imports together — if the combined total is under 50 tonnes, you are exempt.

What about hydrogen? Hydrogen is excluded from the de minimis exemption. Any volume of hydrogen imports is subject to full CBAM obligations.

Can I use the de minimis exemption indefinitely? The threshold applies per calendar year. Each year is assessed independently. If you expect to exceed 50 tonnes, you must apply for authorised CBAM declarant status before doing so.

How CbamTrack Helps You Track Threshold Compliance

CbamTrack's dashboard automatically calculates your total import mass and embedded emissions across all products and sectors, making it easy to see whether you fall under the de minimis threshold:

• Automatic mass tracking — net import mass calculated per product and summed annually
• Sector-aware logic — electricity and hydrogen automatically flagged as non-exempt
• Annual threshold tracking — cumulative mass displayed against the 50-tonne benchmark
• Alert system — notification when your imports approach the threshold limit

Start with a free account to track your first product. No credit card required.