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Biogen (BIIB) Tax Rate (2016 - 2025)

Biogen (BIIB) has 16 years of Tax Rate data on record, last reported at 12.68% in Q4 2025.

  • For Q4 2025, Tax Rate rose 417.0% year-over-year to 12.68%; the TTM value through Dec 2025 reached 16.94%, up 257.0%, while the annual FY2025 figure was 16.94%, 257.0% up from the prior year.
  • Tax Rate reached 12.68% in Q4 2025 per BIIB's latest filing, down from 16.29% in the prior quarter.
  • Across five years, Tax Rate topped out at 109.46% in Q4 2021 and bottomed at 70.28% in Q2 2021.
  • Average Tax Rate over 4 years is 14.98%, with a median of 15.02% recorded in 2024.
  • Peak YoY movement for Tax Rate: soared 10566bps in 2021, then crashed -10046bps in 2022.
  • A 4-year view of Tax Rate shows it stood at 109.46% in 2021, then tumbled by -92bps to 8.99% in 2022, then fell by -5bps to 8.51% in 2024, then skyrocketed by 49bps to 12.68% in 2025.
  • Per Business Quant database, its latest 3 readings for Tax Rate were 12.68% in Q4 2025, 16.29% in Q3 2025, and 14.68% in Q2 2025.