Aon (AON) Tax Rate (2009 - 2026)

Aon's Tax Rate history runs 18 years deep, the most recent figure standing at 20.22% for Q1 2026.

• In Q1 2026, Tax Rate fell 122.0% year-over-year to 20.22%; the TTM figure through Mar 2026 stood at 20.84% (up 19.0% YoY), while the FY2025 annual figure was 21.2%, down 23.0% from the prior year.
• Tax Rate was 20.22% for Q1 2026 at Aon, down from 22.86% in the prior quarter.
• In the past five years, Tax Rate ranged from a high of 23.24% in Q1 2024 to a low of 6.06% in Q4 2022.
• Historically, Tax Rate has averaged 18.48% across 5 years, with a median of 19.6% in 2023.
• Biggest YoY gain for Tax Rate was 2069 bps in 2022; the steepest drop was 1526 bps in 2022.
• A 5-year view of Tax Rate shows it stood at 6.06% in 2022, then soared by 176 bps to 16.75% in 2023, then gained by 5 bps to 17.62% in 2024, then advanced by 30 bps to 22.86% in 2025, then dropped by 12 bps to 20.22% in 2026.
• The last three Tax Rate figures came in at 20.22% (Q1 2026), 22.86% (Q4 2025), and 21.27% (Q3 2025), per Business Quant data.