Amphastar Pharmaceuticals (AMPH) Tax Rate (2013 - 2026)

Amphastar Pharmaceuticals' Tax Rate history runs 14 years deep, the most recent figure standing at 36.13% for Q1 2026.

• On a quarterly basis, Tax Rate rose 1806.0% year-over-year to 36.13% in Q1 2026; TTM through Mar 2026 was 0.42%, a 1760.0% decrease from a year earlier, with the FY2025 full-year figure at 1.92%, down 1371.0% from the prior year.
• Tax Rate climbed to 36.13% in Q1 2026 per AMPH's latest filing, from 49.1% in the prior quarter.
• Across five years, Tax Rate topped out at 36.13% in Q1 2026 and bottomed at 49.1% in Q4 2025.
• The 5-year median for Tax Rate is 19.35% (2025), against an average of 14.74%.
• Across the five-year window, Tax Rate sank 6274 bps in 2025 and surged 1806 bps in 2026, its largest moves.
• Year by year, Tax Rate stood at 17.67% in 2022, then sank by 119 bps to 3.32% in 2023, then surged by 510 bps to 13.64% in 2024, then sank by 460 bps to 49.1% in 2025, then jumped by 174 bps to 36.13% in 2026.
• Per Business Quant, the three latest AMPH Tax Rate figures stand at 36.13% (Q1 2026), 49.1% (Q4 2025), and 19.35% (Q3 2025).