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Aon (AON) Tax Rate (2016 - 2025)

Aon has reported Tax Rate over the past 17 years, most recently at 22.86% for Q4 2025.

  • Quarterly results put Tax Rate at 22.86% for Q4 2025, up 524.0% from a year ago — trailing twelve months through Dec 2025 was 21.2% (down 23.0% YoY), and the annual figure for FY2025 was 21.2%, down 23.0%.
  • Tax Rate for Q4 2025 was 22.86% at Aon, up from 21.27% in the prior quarter.
  • Over the last five years, Tax Rate for AON hit a ceiling of 34.06% in Q2 2021 and a floor of 2.65% in Q3 2021.
  • Median Tax Rate over the past 5 years was 19.2% (2023), compared with a mean of 18.06%.
  • Biggest five-year swings in Tax Rate: crashed -2518bps in 2021 and later soared 2069bps in 2022.
  • Aon's Tax Rate stood at 15.73% in 2021, then plummeted by -61bps to 6.06% in 2022, then skyrocketed by 176bps to 16.75% in 2023, then increased by 5bps to 17.62% in 2024, then rose by 30bps to 22.86% in 2025.
  • The last three reported values for Tax Rate were 22.86% (Q4 2025), 21.27% (Q3 2025), and 15.5% (Q2 2025) per Business Quant data.