Biogen (BIIB) Change in Taxes (2014 - 2026)

Biogen's Change in Taxes history runs 13 years deep, the most recent figure standing at $18.4 million for Q1 2026.

• In Q1 2026, Change in Taxes fell 73.37% year-over-year to $18.4 million; the TTM figure through Mar 2026 stood at -$1.0 billion (down 773.43% YoY), while the FY2025 annual figure was -$958.1 million, down 1320.51% from the prior year.
• Change in Taxes was $18.4 million for Q1 2026 at Biogen, up from -$194.0 million in the prior quarter.
• In the past five years, Change in Taxes ranged from a high of $101.9 million in Q1 2022 to a low of -$603.8 million in Q2 2025.
• Historically, Change in Taxes has averaged -$76.6 million across 5 years, with a median of -$32.4 million in 2023.
• Biggest YoY gain for Change in Taxes was 3240.91% in 2025; the steepest drop was 10878.18% in 2025.
• A 5-year view of Change in Taxes shows it stood at -$42.1 million in 2022, then tumbled by 337.53% to -$184.2 million in 2023, then surged by 108.9% to $16.4 million in 2024, then sank by 1282.93% to -$194.0 million in 2025, then jumped by 109.48% to $18.4 million in 2026.
• The last three Change in Taxes figures came in at $18.4 million (Q1 2026), -$194.0 million (Q4 2025), and -$229.4 million (Q3 2025), per Business Quant data.