Ameren (AEE) Tax Rate (2009 - 2026)

Ameren's Tax Rate history runs 18 years deep, the most recent figure standing at 14.35% for Q1 2026.

• In Q1 2026, Tax Rate fell 35.0% year-over-year to 14.35%; the TTM figure through Mar 2026 stood at 8.72% (up 189.0% YoY), while the FY2025 annual figure was 8.52%, up 198.0% from the prior year.
• Tax Rate was 14.35% for Q1 2026 at Ameren, up from 3.69% in the prior quarter.
• In the past five years, Tax Rate ranged from a high of 19.7% in Q4 2023 to a low of 37.75% in Q4 2024.
• Historically, Tax Rate has averaged 9.46% across 5 years, with a median of 13.44% in 2025.
• The sharpest annual moves came in 2024 and 2025: Tax Rate plunged 5745 bps in 2024, then soared 3406 bps in 2025.
• A 5-year view of Tax Rate shows it stood at 14.58% in 2022, then jumped by 35 bps to 19.7% in 2023, then tumbled by 292 bps to 37.75% in 2024, then jumped by 90 bps to 3.69% in 2025, then surged by 489 bps to 14.35% in 2026.
• The last three Tax Rate figures came in at 14.35% (Q1 2026), 3.69% (Q4 2025), and 7.5% (Q3 2025), per Business Quant data.