Aon plc Q3 2026: adjusted EPS up 10%, but a $24M one-off and deal-cash interest did much of the work

Aon plc, one of the world's largest insurance brokers and benefits consultants, reported third-quarter 2026 revenue of $4,101 million, up 3% from $3,997 million. Adjusted EPS rose 10% to $3.36 and diluted (GAAP) EPS rose 6% to $2.23. The adjusted figure is the one Aon leads with, and it looks better than the quarter was: about $48 million of the $77 million rise in adjusted pre-tax profit came from two items that won't repeat. One was a $24 million one-time revenue catch-up in reinsurance. The other was $24 million of interest earned on cash Aon borrowed ahead of time to pay for its pending USI acquisition.

This analysis is written from the earnings release (Exhibit 99.1 to the 8-K filed October 28, 2026). Aon's full Form 10-Q for the quarter was not yet on EDGAR at the time of writing, so a few details from management's discussion, such as debt maturities and USI deal terms, aren't covered here.

Key metrics

Operating margin is the share of revenue left after the costs of running the business, before interest and tax. A basis point (bp) is a hundredth of a percentage point, so 70 bps is 0.7 points. Fiduciary investment income is the interest Aon earns on client premiums it holds in trust before passing them on to insurers. It is left out of organic growth.

Takeaway: Aon's underlying growth is real but slower than the 10% adjusted EPS headline. Take out the $24 million reinsurance catch-up and adjusted operating income grew about 3%, not 5%. A further $24 million of the profit growth was interest on $13.4 billion of debt raised to buy USI, and that disappears when the deal closes, while the interest bill on that debt arrives in full from Q4.

Where the growth came from

• Commercial Risk Solutions (helping companies buy insurance) grew 7% organically. The release cites "strong growth in North America and EMEA, driven by net new business and ongoing strong retention," with North America led by M&A services, U.S. core property and casualty, and construction. Net market impact is the effect of insurance prices on Aon's commissions, which are usually a percentage of the premium. It was "slightly positive," so most of this growth came from more business, not higher prices.
• Reinsurance Solutions (placing insurance for insurance companies) reported 7% organic growth. That includes "a favorable impact from the reversal of the constraint applied against prior period revenue", the $24 million footnoted in the reconciliation. Net market impact was "unfavorable," meaning softer reinsurance prices reduced commissions. Without the catch-up, underlying growth was low single digits.
• Health Solutions grew 6% organically on core health and benefits, "particular strength internationally," and talent analytics.
• Wealth Solutions revenue fell 21% because Aon sold the NFP Wealth business, a 25-point drag. The remaining business grew 4% organically, mainly UK and EMEA retirement advisory work driven by regulatory change.

By segment, Risk Capital revenue rose 6% to $2,682 million and its adjusted operating margin rose to 26.6% from 26.2%. Human Capital revenue fell 4% to $1,421 million because of the Wealth sale, while its adjusted margin rose to 31.0% from 30.5%. Some of that margin gain comes from selling a lower-margin business, not from running the remaining business better.

Why GAAP operating income fell while adjusted rose 5%

GAAP operating income slipped $7 million to $809 million, while adjusted operating income rose $55 million. The gap comes from items Aon excludes from its adjusted figures:

• Restructuring: Accelerating Aon United Program expenses rose to $93 million from $32 million, "due primarily to costs related to workforce optimization." The program also produced $20 million of net restructuring savings in the quarter.
• USI deal costs: $25 million of advisory and legal fees, booked in corporate costs, compared with $10 million of NFP-related costs a year ago.
• A harder prior-year comparison: Q3 2025 expenses were reduced by a $23 million net legal recovery in Risk Capital. Other general expense rose $36 million (+8%), "due primarily to a recovery in the prior-year period associated with a legal settlement as well as USI-related transaction costs."
• Offsets: amortization of acquired intangibles fell $18 million to $175 million, mostly because the NFP Wealth intangibles left with the sale. Changes in contingent consideration, meaning payments owed to sellers of businesses Aon bought, cost $4 million compared with $23 million.

Information technology spending rose 11% to $156 million on Aon Business Services technology projects. That is a cost Aon keeps in adjusted results, which is the right treatment.

What the headline numbers hide

The adjusted profit growth relied heavily on two non-recurring items. Adjusted pre-tax income rose $77 million, from $832 million to $909 million. Two items explain $48 million of that:

1. The $24 million reinsurance constraint reversal. This is revenue for work done in earlier periods that Aon only now judged certain enough to book. If it flowed straight to profit, adjusted operating income grew about 3% ($1,082 million against $1,051 million), and the adjusted margin rose only about 20 bps rather than 70 bps.
2. $24 million of interest income, compared with zero a year ago, "primarily reflecting higher cash balances as a result of the net proceeds raised from debt issuance." Aon issued $13.4 billion of debt in the first nine months. At September 30 it held $13.3 billion of short-term investments (up from $1.6 billion) and total debt of about $28.0 billion (up from about $15.2 billion). Interest expense stayed flat at $206 million only because the new debt was "issued near the end of the quarter." Once USI closes, the interest income goes away and the interest cost on the new debt stays.

Without those two items, adjusted pre-tax income grew about 3.5%. A higher tax rate partly offset the gain: the adjusted rate was 20.2% against 19.2%, and the release cites the geographic mix of income and discrete items, meaning one-off tax effects that land in a single quarter.

Fewer shares added about 2 points of EPS growth, and Q3 had no buybacks. Diluted shares fell 1.7% to 213.0 million, but Aon "did not repurchase any shares in the third quarter." The lower count reflects $1.1 billion of buybacks in the first half. Aon says it will now "prioritize debt repayment" after USI, so this boost should fade into 2027. The quarter's capital returns were $174 million of dividends, derived from $511 million year-to-date less $337 million through June.

Cash conversion is fine. Operating cash flow was $1,191 million in the quarter against $486 million of net income, helped by seasonal timing. For nine months it was $2,177 million against $2,290 million, a ratio of about 0.95. Year-to-date receivables used $591 million of cash, compared with $342 million a year earlier, and USI transaction costs also weighed on cash.

The GAAP comparison is harsher than the business. Restructuring, USI fees and the absence of last year's $23 million legal recovery held GAAP results back by about $99 million pre-tax more than a year ago. That is why GAAP EPS grew 6% while adjusted grew 10%. Restructuring has now run for more than three years, though, so it is worth reading as a recurring cost rather than a pure one-off.

On balance the quarter is flattered: the headline 10% adjusted EPS growth and 6% organic growth both include a $24 million revenue catch-up, and the profit growth leaned on temporary interest income on deal cash. Without those, underlying adjusted profit grew in the low single digits.

Did last quarter's read hold up?

Our Q2 2026 report flagged three things to watch.

• Fiduciary income: it kept shrinking, to $69 million from $75 million.
• Reinsurance pricing: net market impact was unfavorable again, and the 7% organic figure only looks strong because of the one-time reversal.
• The tax rate: it was still a headwind, but a smaller one. The adjusted rate was 1 point higher than a year ago, against 3.6 points in Q2.

In July, management reaffirmed double-digit free cash flow growth for 2026. Year-to-date free cash flow is up only 3%, to $1,943 million, so that target needs a very strong Q4. The 70–80 bps adjusted margin target is on track: the year-to-date adjusted margin is 32.1%, up 80 bps.

Outlook

The release gives no numeric full-year targets. Management says it enters Q4 "with significant momentum, reinforcing our confidence in our ability to deliver strong financial performance for full-year 2026." It also says:

• USI is expected to close in Q4 2026. Aon "will prioritize debt repayment with a path towards deleveraging to our 2.8x-3.0x objective in approximately 24 months." Leverage here is total debt divided by a year of EBITDA, a measure of operating profit before interest, tax, depreciation and amortization.
• Currency: a de minimis (negligible) effect on Q4 adjusted EPS, and a benefit of about $0.42 per share for full-year 2026 if exchange rates hold.

Our read: the core business is still compounding, with 7% organic growth in Commercial Risk on new business, not pricing, and 6% in Health. But 2027 earnings face three mechanical headwinds:

• Interest expense on roughly $13 billion of new debt, with no matching interest income once the cash is spent.
• No buyback support while Aon pays debt down.
• Softer reinsurance pricing.

USI will add revenue and profit, but the release gives no figures, so we can't yet say whether it covers that interest bill. In Q4, watch three things: Reinsurance organic growth without the one-off, the jump in interest expense, and whether free cash flow growth comes close to the double-digit goal.