What is CBAM definitive period?

The CBAM definitive period is the full-compliance phase of the Carbon Border Adjustment Mechanism that began on 1 January 2026, after the transitional period ended on 31 December 2025.

CBAM was implemented in phases so that impacted businesses and public authorities could adapt to the statutory requirements.

Definitive-regime obligations are walked through on the CBAM Solutions page and the CBAM Compliance Guide.