In stages: a 2.5% reduction in 2026, 5% in 2027, 10% in 2028, 22.5% in 2029, 48.5% in 2030, 61% in 2031, 73.5% in 2032, 86% in 2033, and 100% in 2034. The steepest step is between 2029 and 2030, when the reduction more than doubles in a year.
Read the source article: CBAM: the end of free ETS allowances for producers