What is Aon plc (AON)'s PEG ratio?

Aon plc (AON) has a PEG ratio of 1.21 (Fairly Valued), based on a PE ratio of 18.2 and expected EPS growth of 15.0% (5-Year EPS CAGR).

Is AON undervalued based on its PEG ratio?

A PEG below 1.0 is conventionally read as potentially undervalued, 1.0–2.0 as fairly valued, and above 2.0 as potentially overvalued relative to growth. At 1.21, Aon plc (AON) screens as "Fairly Valued". PEG is one signal, not investment advice — see the full DCF fair value at evidinvest.com/valuation/AON.

Aon plc (AON) PEG Ratio

Fairly Valued

PE ratio relative to earnings growth — is the valuation justified?

1.21

PEG Ratio

PEG ratio is generally unreliable for Financial Services companies — earnings are driven by interest margins and provisions

PEG ratio is generally unreliable for Financial Services companies

1.21

Growth Rate Source

Good Data Quality5-Year EPS CAGR

Current Price

$330.88

TTM EPS

$18.14

P/E Ratio

18.24

Growth Rate

15.0%

5-Year EPS CAGR

Sector

Financial Services

Insurance - Brokers

Calculated

9/3/2026

1:35:35 PM

Peer Comparison

Sample Size

8 peers

Industry Median PEG

1.28

25th Percentile

1.20

75th Percentile

1.71

AON PEG (1.21) vs Industry Median (1.28): 5% discount

Symbol	Company	PEG	P/E	Growth	vs AON
AIZ	ASSURANT, INC.	0.70	13.6	19.5%	-43%
GL	GLOBE LIFE INC.	0.74	11.5	15.6%	-39%
ALLE	Allegion plc	1.20	20.4	17.0%	-1%
MMC	Marsh & McLennan Companies, Inc.	1.28	20.9	16.3%	+6%
WTW	WILLIS TOWERS WATSON PLC	1.28	20.9	16.3%	+6%

How to Interpret PEG Ratio

PEG < 1.0 — Potentially Undervalued. The stock may be priced below its earnings growth rate, suggesting a potential buying opportunity.

PEG 1.0–2.0 — Fairly Valued. The stock price is roughly in line with its earnings growth. A PEG of 1.0 is often considered "fair value."

PEG > 2.0 — Potentially Overvalued. The stock may be priced above what its earnings growth justifies.

Limitations:PEG ratios are less reliable for financial firms (earnings driven by interest margins), companies with negative/zero earnings growth, and hypergrowth companies (>100% growth) where the ratio may appear misleadingly low. Always use PEG alongside other valuation metrics.

Aon plc (AON) PEG Ratio

Peer Comparison

How to Interpret PEG Ratio

More on AON

Compare with peers

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Aon plc (AON) PEG Ratio

Peer Comparison

How to Interpret PEG Ratio

More on AON

Compare with peers

Explore