Tax

Effective Income Tax Rate

Biogen Effective Income Tax Rate decreased by 5.5% to $0.15 in Q1 2026 compared to the prior quarter. Year-over-year, this metric declined by 32.2%, from $0.23 to $0.15.

Analysis

StatementIncome Statement
SectionTax
First reportedQ1 2015
Last reportedQ1 2026
Metric ID: tjx_effective_income_tax_rate

Historical Data

15 periods
 Q2 '21Q3 '21Q1 '22Q2 '22Q3 '22Q1 '23Q2 '23Q3 '23Q1 '24Q2 '24Q3 '24Q1 '25Q2 '25Q3 '25Q1 '26
Value-$0.70-$0.09$0.36$0.17$0.17$0.12$0.16$0.52$0.15$0.17$0.14$0.23$0.15$0.16$0.15
QoQ Change+87.3%+506.7%-52.8%+0.6%-32.6%+39.7%+218.5%-70.2%+7.1%-15.8%+63.3%-35.2%+10.9%-5.5%
YoY Change+124.3%+293.3%-68.0%-5.3%+200.0%+32.8%+1.9%-73.1%+47.4%-10.9%+17.3%-32.2%
Range-$0.70$0.52
CAGR-35.2%
Avg YoY Growth+44.0%
Median YoY Growth+9.6%

Frequently Asked Questions

What is Biogen's effective income tax rate?
Biogen (BIIB) reported effective income tax rate of $0.15 in Q1 2026.
How has Biogen's effective income tax rate changed year-over-year?
Biogen's effective income tax rate decreased by 32.2% year-over-year, from $0.23 to $0.15.