CBAM 2026 Threshold & Cost Check by ReadyStack

The 50 t de minimis, the 2.5% 2026 factor and the Art. 26 exposure, for one import line, in your browser


Click Add to Firefox on this page. Nothing to unzip, no developer mode - the free version runs right away.

• 50 t/year de minimis check — Tells you whether a calendar-year net mass is under the 50 t threshold of Art. 2(3a) (Reg. (EU) 2025/2083) and how many tonnes of headroom are left - and that hydrogen and electricity have no de minimis at all.
• 2026 certificate cost at the 2.5% factor — Prices the certificates actually due: embedded CO2e x the CBAM factor (2.5% in 2026, 5% in 2027) x your EUA price, minus any carbon price already paid in the country of origin.
• Art. 26 exposure line — Shows the minimum penalty exposure on the same import at EUR 300 per tonne CO2e - the low end of the 3-5x rate for importing CBAM goods without authorised declarant status.
• The two dates that replaced the quarterly report — Returns the live deadline for your case: certificate sales open 1 Feb 2027 and the 2026 CBAM declaration is due 30 Sep 2027, or the Art. 26 warning if you are over 50 t and not authorised.
• CSV export of every line you ran (paid) — Writes goods group, net mass, factor, certificates due and cost to a .csv you keep, so the working behind your CBAM declaration leaves the browser with you.
• Chrome alarms for 1 Feb 2027 and 30 Sep 2027 (paid) — Sets the two CBAM dates as browser alarms so the declaration window does not pass while the calculation sits in a closed tab.

| You type | |
|---|---|
| CBAM goods group | default iron_and_steel |
| Net mass imported this calendar year | default 620 |
| Embedded emissions (supplier figure or Commission default) | default 2.1 |
| CBAM certificate price (EUA weekly average) | default 82.48 |
| Carbon price already paid in the country of origin | default 0 |
| Import year (CBAM factor) | default 2026 |
| Already an authorised CBAM declarant | default False |

| It answers | |
|---|---|
| De minimis status | |
| Headroom left under 50 t (negative = over) | t |
| Embedded emissions on this line | t CO2e |
| Chargeable CO2e after the CBAM factor | t CO2e |
| CBAM certificates due | certificates |
| Certificate cost | EUR |
| Art. 26 exposure at 300 EUR per t CO2e | EUR |
| What happens next | |

Permissions requested: storage, alarms, downloads


Free: the calculation in the popup, no key, no limit. Full version ($60): download the result as .csv and deadline reminders - one licence key per person or team seat. Get it: https://getreadystack.com/api/buy/cl/polar_cl_zoabRxvvSRoa4ZXbDcwVCboSpCf2Lo18WPTXW0qrCxu


When you use the tool, the extension sends one anonymous count a day (the tool’s name only — no inputs, no personal data). Turn it off on the first page after install. Firefox asks first and sends nothing unless you allow it. A licence key is checked with the payment provider (Polar) only when you enter one.