How to Prepare for CBAM Deadlines

Tracking CBAM reporting deadlines is critical for avoiding automatic penalty calculations. This calendar covers all 2026 data collection periods and explains what happens if you miss them.

"The first CBAM declaration for the 2026 compliance year is due by 30 September 2027. Certificate purchases begin on 1 February 2027." — IR (EU) 2025/2548

All dates and penalty amounts in this article are sourced from EU Regulation 2023/956 and the European Commission's official CBAM publications. Last verified: July 2026.

2026 CBAM Data Collection Calendar

Period	Data Collection Period	Certificate Purchase Deadline	Days Available
Q1	January 1 – March 31	April 30, 2026 (50% holding checkpoint)	30 days
Q2	April 1 – June 30	July 31, 2026 (50% holding checkpoint)	31 days
Q3	July 1 – September 30	October 31, 2026 (50% holding checkpoint)	31 days
Q4	October 1 – December 31	January 31, 2027 (50% holding checkpoint)	31 days

What Happens If You Miss a Deadline?

Late submissions trigger automatic consequences:

Delay Period	Consequence
First 30 days	Penalty warning from national authority
30–60 days	€10–€50 per tonne of unreported CO₂
60+ days	Maximum penalty of €100 per tonne
Repeated violations	Enhanced scrutiny, mandatory audits, import restrictions

The penalty is calculated on the total embedded emissions that should have been reported, not just the overdue portion.

What a Late Submission Actually Costs: A Real Example

Consider a steel importer who imports 5,000 tonnes of BF-BOF rebar from China per quarter. At 2.236 tCO₂e/t (direct + indirect), each quarter represents 11,180 tCO₂e in embedded emissions. If they miss the Q1 deadline by 45 days, the penalty is not fixed — it scales: €10–€50 per tonne in the first 30–60 day bracket. At the midpoint of €30/tonne, that is €335,400 for one late quarter. For the same reason, setting calendar reminders is not optional administrative overhead — it is a financial protection measure worth potentially hundreds of thousands of euros per year.

How to Never Miss a Deadline

Use a Compliance Calendar

Mark all quarterly certificate purchase checkpoints in your calendar at the start of the year. Add internal deadlines for data collection at least two weeks before each checkpoint.

Set Automated Reminders

Configure email or calendar reminders at three critical points:

• 30 days before deadline — Start data collection
• 15 days before deadline — Generate draft report
• 7 days before deadline — Final review and submission

Prepare Data in Advance

Product import data is available from customs declarations as soon as goods clear. Start your quarterly data collection before the period ends, not after.

CbamTrack's built-in compliance calendar tracks all CBAM deadlines with automatic email reminders and iCal export for integration with your existing calendar system.

Deadline Planning Tips

1. Start early — Begin data collection 4–6 weeks before each checkpoint
2. Use default factors if needed — Don't delay submission waiting for supplier data
3. Submit early — You can amend a declaration within two months after submission
4. Document everything — Keep records of all data sources and calculations
5. Review trends — Compare each quarter against previous ones to spot anomalies

FAQ

When is the CBAM deadline?

Under the definitive CBAM regime (2026+), annual declarations are due by September 30 of the year following the import period. The first declaration covering 2026 imports is due September 30, 2027. Quarterly certificate purchase checkpoints require holding at least 50% of year-to-date embedded emissions by April 30, July 31, October 31, and January 31. Certificate purchases follow a quarterly schedule in 2026, moving to weekly from 2027.

What happens if I miss a CBAM deadline?

Late submissions trigger automatic penalties: €10–€50 per tonne of unreported CO₂ within the first 60 days, increasing to €100 per tonne for repeated violations. The penalty is calculated on total embedded emissions that should have been reported. Enhanced scrutiny, mandatory audits, and potential import restrictions may follow. There is no extension mechanism under current CBAM regulations.

What if the deadline falls on a weekend? Submit on the next business day. However, it is safer to submit before the weekend.

Can I get an extension? Extensions are not granted under current CBAM regulations. Plan ahead.

Are the deadlines the same for all EU countries? Yes. CBAM deadlines are set by EU regulation and are uniform across all member states.

Do I need to submit if I had no imports in a quarter? Submit a nil report indicating zero imports. Failing to submit any report — even a nil one — can trigger penalties.

Sources

• EU Regulation 2023/956 — CBAM main regulation
• IR (EU) 2025/2548 — Deadline and transitional rules
• European Commission CBAM page

Last updated: July 2026 | Sources: EU Regulation 2023/956, European Commission CBAM publications

Never Miss a Deadline Again

CbamTrack's compliance calendar sends automated reminders before each quarterly certificate purchase checkpoint, tracks submission status, and maintains a complete history of all your CBAM reports. Download our free CBAM reporting template to organise your data, compare alternatives, or try CbamTrack free.