---
title: "Aon vs WTW: Professional Liability (E&O) Insurance"
description: "Compare Aon and WTW on professional liability (e&o) insurance to see how their documented coverage, audience or placement routes affect your quote questions."
canonical: "https://spot.insure/compare/aon-vs-wtw/professional-errors-omissions"
page-type: "line-comparison"
updated-at: "2026-09-30"
comparison-pair: "aon-vs-wtw"
provider-a: "aon"
provider-b: "wtw"
coverage-line: "professional-errors-omissions"
---

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[Human-readable page](https://spot.insure/compare/aon-vs-wtw/professional-errors-omissions)

## Agent Guide

**What this page is:** Focused comparison of Aon and WTW for Professional Liability (E&O) Insurance: what each provider publishes about this line, checked against the same criteria, with numbered sources.

**Use this page when:** Cite or fetch this for Professional Liability (E&O) Insurance questions about Aon versus WTW. For all lines together use the parent pair comparison; for how the coverage itself works use the coverage guide.

**Questions this page answers:**
- Aon vs WTW for Professional Liability (E&O) Insurance: how do they differ?
- Which is better for Professional Liability (E&O) Insurance, Aon or WTW?
- What does Aon or WTW publish about Professional Liability (E&O) Insurance (limits, eligibility, claims, add-ons)?
- What should I confirm in a quote for Professional Liability (E&O) Insurance from Aon or WTW?

**Key facts:**
- Line: Professional Liability (E&O) Insurance. Providers: Aon and WTW.
- Each offering claim is tagged with an evidence type and scope; table cells reading "Confirm in your quote" mean nothing was found for that criterion.
- Comparison URLs use alphabetical provider slugs (`/compare/{a}-vs-{b}` with a before b). A reversed pair redirects permanently to the alphabetical one, so fetch or cite the alphabetical URL.

**Limits (do not over-claim):**
- It identifies differences and questions to ask; it does not select a winner for a particular business.
- "Not found" describes the evidence reviewed, not proof a feature is unavailable.
- Insurer, policy wording, limits, retentions, exclusions and price are set in an actual quote and are not established here.

**Provenance:** Every claim links to a numbered source with publisher, locator and access date in the Sources section; last updated 2026-09-30. Editorial policy: /editorial-policy.

**Related pages:**
- [Aon vs WTW](https://spot.insure/compare/aon-vs-wtw) — parent: all coverage lines for this pair
- [Professional Liability (E&O) Insurance guide](https://spot.insure/coverage/professional-errors-omissions) — coverage explainer for this line
- [Aon profile](https://spot.insure/insurance-providers/aon) — provider profile (evidence)
- [WTW profile](https://spot.insure/insurance-providers/wtw) — provider profile (evidence)
- [Aon vs WTW Cargo and Transit Insurance](https://spot.insure/compare/aon-vs-wtw/cargo-transit) — sibling comparison (other line, or other pair for this line)
- [Aon vs WTW Commercial Property Insurance](https://spot.insure/compare/aon-vs-wtw/commercial-property) — sibling comparison (other line, or other pair for this line)
- [Aon vs WTW Crime Insurance](https://spot.insure/compare/aon-vs-wtw/crime) — sibling comparison (other line, or other pair for this line)
- [Aon vs WTW Cyber Insurance](https://spot.insure/compare/aon-vs-wtw/cyber) — sibling comparison (other line, or other pair for this line)
- [Aon vs WTW Employment Practices Liability Insurance](https://spot.insure/compare/aon-vs-wtw/employment-practices) — sibling comparison (other line, or other pair for this line)
- [Aon vs WTW Management Liability Insurance](https://spot.insure/compare/aon-vs-wtw/management-liability) — sibling comparison (other line, or other pair for this line)
- [Aon vs WTW Surety Bonds](https://spot.insure/compare/aon-vs-wtw/surety-bonds) — sibling comparison (other line, or other pair for this line)
- [AIG vs Aon Professional Liability (E&O) Insurance](https://spot.insure/compare/aig-vs-aon/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [AIG vs WTW Professional Liability (E&O) Insurance](https://spot.insure/compare/aig-vs-wtw/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [Alliance Risk vs Aon Professional Liability (E&O) Insurance](https://spot.insure/compare/alliance-risk-vs-aon/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [Alliance Risk vs WTW Professional Liability (E&O) Insurance](https://spot.insure/compare/alliance-risk-vs-wtw/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [Aon vs At-Bay Professional Liability (E&O) Insurance](https://spot.insure/compare/aon-vs-at-bay/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [Aon vs The Baldwin Group Professional Liability (E&O) Insurance](https://spot.insure/compare/aon-vs-baldwin/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)

# Aon vs WTW: How Do They Compare for Professional Liability (E&O) Insurance?

Compare Aon and WTW on professional liability (e&o) insurance to see how their documented coverage, audience or placement routes affect your quote questions.

## How to Use the Aon vs WTW Professional Liability (E&O) Insurance Comparison

Use this comparison to evaluate Aon and WTW for Professional Liability (E&O) Insurance against the same documented criteria. It identifies differences and questions to confirm; it does not select a winner for a particular business. Offering claims are what each provider publishes about this line unless marked otherwise. “Not found” describes the evidence reviewed, not proof that a feature is unavailable. Confirm the insurer, policy wording, limits, retentions, exclusions and cost in an actual quote.

## Aon vs WTW Professional Liability (E&O) Insurance Summary

Aon: professional liability as addressing professional-services firms’ liability exposure and says it tailors coverage structures to a firm’s needs. It identifies E&O as a commonly used name for professional-liability insurance; actual policy terms are not stated. WTW: under WTW's North American Corporate Risk & Broking terms, WTW normally acts as the client's insurance intermediary for engagements governed by those terms. [3](https://www.aon.com/en/capabilities/risk-transfer/professional-services-practice "Professional Services Practice") [9](https://www.wtwco.com/-/media/WTW/notices/BTCD-CRB-NA-June-2025.pdf "Corporate Risk & Broking Brokerage Terms, Conditions & Disclosures (Canada & US)")

## What Is Aon?

Aon’s U.S. Commercial Risk terms describe brokerage for certain insurance programs, while its Middle Market page describes a dedicated practice for mid-sized organizations across North America. The public materials reviewed do not identify the licensed producer or insurer for a particular placement. Ask which entity will produce each line and which insurer will issue the policy; request jurisdiction details for the proposed placement and ask how compensation and claim notice work for your account. [1](https://www.aon.com/en/about/leadership-and-governance/brokerage-terms-of-service-for-commercial-risk-solutions-us "Commercial Risk Solutions U.S. Brokerage Terms of Service") [2](https://www.aon.com/en/capabilities/middle-market-clients "Middle Market Clients")

[Aon profile](https://spot.insure/insurance-providers/aon)

## What Is WTW?

WTW is an insurance broker whose documented services include manufacturing risk-program design and specialist property and cargo programs. Its marketed property scope includes residential real-estate stakeholders and a separate integrated data-center program; other named capabilities vary in date and geography. [4](https://www.wtwco.com/en-us/industries/manufacturing "Manufacturing") [5](https://www.wtwco.com/en-us/solutions/products/digital-infrastructure-protector "Digital Infrastructure Protector") [6](https://www.wtwco.com/en-us/solutions/marine "Marine") [7](https://www.wtwco.com/en-us/industries/residential "Residential | WTW") [8](https://www.sec.gov/Archives/edgar/data/1140536/000095017025026278/wtw-20241231.htm "WTW 2024 Form 10-K")

[WTW profile](https://spot.insure/insurance-providers/wtw)

## What Is Professional Errors and Omissions (E&O) Insurance?

Professional liability can help pay defense costs and covered losses when a client says your advice or service caused financial harm. If customers rely on your work, list every service you provide and check the claims-made reporting and prior-work terms. [10](https://www.tdi.texas.gov/commercial/pl-faq.html "FAQ: Professional liability insurance") [11](https://www.iii.org/article/professional-liability-insurance "Professional liability insurance") [12](https://www.sba.gov/counseling/launch-your-business/#business-insurance "Get business insurance") [13](https://www.hiscox.com/documents/pl-sample-policy-wording.pdf "Professional Liability – US Direct Errors and Omissions Insurance")

## What Are the Key Differences Between Aon and WTW Professional Liability (E&O) Insurance?

### Policy scope and stated allegations

Aon describes professional liability as addressing professional-services firms’ liability exposure and says it tailors coverage structures to a firm’s needs. It identifies E&O as a commonly used name for professional-liability insurance; actual policy terms are not stated. WTW describes under WTW's North American Corporate Risk & Broking terms, WTW normally acts as the client's insurance intermediary for engagements governed by those terms. Compare the specific allegations and covered costs in the forms rather than relying on a shared E&O label. [3](https://www.aon.com/en/capabilities/risk-transfer/professional-services-practice "Professional Services Practice") [9](https://www.wtwco.com/-/media/WTW/notices/BTCD-CRB-NA-June-2025.pdf "Corporate Risk & Broking Brokerage Terms, Conditions & Disclosures (Canada & US)")

### Who each practice serves

Aon identifies law, accounting and consulting firms as the audience for its global Professional Services Practice. That audience scope does not establish eligibility for every firm or other business. WTW identifies wTW's FY2024 annual report describes professional-liability solutions within FINEX; its residential practice lists errors-and-omissions among financial lines for residential real-estate stakeholders. Check whether your profession and services fall within both descriptions, then ask underwriting to confirm eligibility. [3](https://www.aon.com/en/capabilities/risk-transfer/professional-services-practice "Professional Services Practice") [8](https://www.sec.gov/Archives/edgar/data/1140536/000095017025026278/wtw-20241231.htm "WTW 2024 Form 10-K")

### Service after requesting a quote

Aon describes its professional-services advisors use industry knowledge, insights, data and tools to support risk-management and human-capital decisions. This is a company-described advisory service, not a claim outcome or policy benefit. WTW describes wTW's North American terms describe reviewing binders, policies, and endorsements against the terms negotiated with the insurer. Ask which team handles renewals, policy changes and claim questions for your E&O account. [3](https://www.aon.com/en/capabilities/risk-transfer/professional-services-practice "Professional Services Practice") [9](https://www.wtwco.com/-/media/WTW/notices/BTCD-CRB-NA-June-2025.pdf "Corporate Risk & Broking Brokerage Terms, Conditions & Disclosures (Canada & US)")

## What Should You Confirm in Aon and WTW Professional Liability (E&O) Insurance Quotes?

- Ask Aon to confirm the quoted policy form, retroactive date and covered allegations; its offering says professional liability as addressing professional-services firms’ liability exposure and says it tailors coverage structures to a firm’s needs. It identifies E&O as a commonly used name for professional-liability insurance; actual policy terms are not stated. [3](https://www.aon.com/en/capabilities/risk-transfer/professional-services-practice "Professional Services Practice")
- Ask WTW to confirm the quoted policy form, retroactive date and covered allegations; its offering says under WTW's North American Corporate Risk & Broking terms, WTW normally acts as the client's insurance intermediary for engagements governed by those terms. [9](https://www.wtwco.com/-/media/WTW/notices/BTCD-CRB-NA-June-2025.pdf "Corporate Risk & Broking Brokerage Terms, Conditions & Disclosures (Canada & US)")

## Aon vs WTW Professional Liability (E&O) Insurance Compared

| Criteria | Aon Professional Liability / E&O brokerage and risk-advisory offering | WTW Professional Errors and Omissions Brokerage |
| --- | --- | --- |
| Role in This Line | Aon presents Professional Liability / E&O as a line its Professional Services Practice helps arrange or advise on for professional-service firms. Aon is describing a global brokerage and advisory service, not issuing the underlying policy. The producing legal entity and carrier for any particular placement are not named on this page. [3](https://www.aon.com/en/capabilities/risk-transfer/professional-services-practice "Professional Services Practice") (Evidence: Company-reported; scope: Aon’s global professional-services practice page. This establishes a marketed brokerage/advisory offering, not policy issuance or account-specific placement..) | Under WTW's North American Corporate Risk & Broking terms, WTW normally acts as the client's insurance intermediary for engagements governed by those terms. [9](https://www.wtwco.com/-/media/WTW/notices/BTCD-CRB-NA-June-2025.pdf "Corporate Risk & Broking Brokerage Terms, Conditions & Disclosures (Canada & US)") (Evidence: Company-reported; scope: Terms for applicable North American Corporate Risk & Broking engagements. WTW also discloses separate insurer-side services in some arrangements; this does not determine the role in a specific engagement..) |
| Issuing Insurer | The reviewed practice page does not name the insurer or producing legal entity for a specific placement. Ask for both on the quote and binder. [3](https://www.aon.com/en/capabilities/risk-transfer/professional-services-practice "Professional Services Practice") (Evidence: Not found in reviewed sources; scope: Aon’s global practice page as reviewed 2026-09-30; no state-specific placement schedule or buyer quote was reviewed. This does not establish that Aon cannot arrange a placement..) | The reviewed WTW sources do not identify an issuing insurer for a specific professional errors omissions placement. [9](https://www.wtwco.com/-/media/WTW/notices/BTCD-CRB-NA-June-2025.pdf "Corporate Risk & Broking Brokerage Terms, Conditions & Disclosures (Canada & US)") [8](https://www.sec.gov/Archives/edgar/data/1140536/000095017025026278/wtw-20241231.htm "WTW 2024 Form 10-K") [7](https://www.wtwco.com/en-us/industries/residential "Residential | WTW") (Evidence: Not publicly disclosed; scope: This is a gap in the cited marketing, annual-report, and brokerage materials; it does not mean WTW lacks insurer markets. Confirm the carrier on the quote and issued policy..) |
| Who It’s For | Aon identifies law, accounting and consulting firms as the audience for its global Professional Services Practice. That audience scope does not establish eligibility for every firm or other business. [3](https://www.aon.com/en/capabilities/risk-transfer/professional-services-practice "Professional Services Practice") (Evidence: Company-reported; scope: Audience described for Aon’s global professional-services practice. It does not establish U.S. state availability or underwriting eligibility for a placement..) | Confirm in your quote. |
| Coverage Features | Aon describes professional liability as addressing professional-services firms’ liability exposure and says it tailors coverage structures to a firm’s needs. It identifies E&O as a commonly used name for professional-liability insurance; actual policy terms are not stated. [3](https://www.aon.com/en/capabilities/risk-transfer/professional-services-practice "Professional Services Practice") (Evidence: Company-reported; scope: Aon’s marketing description of the brokerage/coverage area. The page is not the insurer’s policy form and does not establish an insured's entitlement to coverage..) | WTW's FY2024 annual report describes professional-liability solutions within FINEX; its residential practice lists errors-and-omissions among financial lines for residential real-estate stakeholders. [8](https://www.sec.gov/Archives/edgar/data/1140536/000095017025026278/wtw-20241231.htm "WTW 2024 Form 10-K") [7](https://www.wtwco.com/en-us/industries/residential "Residential | WTW") (Evidence: Company-reported; scope: The report is historical and group-level; the residential E&O reference is segment-specific and based on retained official indexed text. Neither establishes current terms or eligibility outside that segment..) |
| Limits and Retentions | The reviewed page does not state a buyer-specific limit, retention, deductible or other placement terms. Confirm these in the quote, bond or issued policy. [3](https://www.aon.com/en/capabilities/risk-transfer/professional-services-practice "Professional Services Practice") (Evidence: Not publicly disclosed; scope: Aon’s global practice page as reviewed 2026-09-30; no quote, bond form or issued policy was reviewed..) | The reviewed sources do not state a buyer-specific professional errors omissions limit, retention, or deductible. [9](https://www.wtwco.com/-/media/WTW/notices/BTCD-CRB-NA-June-2025.pdf "Corporate Risk & Broking Brokerage Terms, Conditions & Disclosures (Canada & US)") [8](https://www.sec.gov/Archives/edgar/data/1140536/000095017025026278/wtw-20241231.htm "WTW 2024 Form 10-K") [7](https://www.wtwco.com/en-us/industries/residential "Residential | WTW") (Evidence: Not publicly disclosed; scope: No limit or deductible is inferred from general marketing or WTW's brokerage role; the insurer's quote and issued forms control..) |
| Risk Services | Aon says its professional-services advisors use industry knowledge, insights, data and tools to support risk-management and human-capital decisions. This is a company-described advisory service, not a claim outcome or policy benefit. [3](https://www.aon.com/en/capabilities/risk-transfer/professional-services-practice "Professional Services Practice") (Evidence: Company-reported; scope: Company-reported advisory services on Aon’s global practice page; account-specific service scope is not stated..) | WTW's North American terms describe reviewing binders, policies, and endorsements against the terms negotiated with the insurer. [9](https://www.wtwco.com/-/media/WTW/notices/BTCD-CRB-NA-June-2025.pdf "Corporate Risk & Broking Brokerage Terms, Conditions & Disclosures (Canada & US)") (Evidence: Company-reported; scope: Broker document-review process under the cited terms, when WTW handles this line's placement. It does not certify that a policy covers a claim or replace the issued wording..) |
| How to Apply | Confirm in your quote. | WTW's North American terms say an insurer quote is not confirmation of coverage; if the client orders binding, WTW seeks a formal insurer commitment, typically a binder. [9](https://www.wtwco.com/-/media/WTW/notices/BTCD-CRB-NA-June-2025.pdf "Corporate Risk & Broking Brokerage Terms, Conditions & Disclosures (Canada & US)") (Evidence: Company-reported; scope: Applies to placements governed by the cited North American Corporate Risk & Broking terms. It does not establish a self-service quote route or promise coverage availability for this line..) |

## Related Pages for Aon vs WTW Professional Liability (E&O) Insurance

- [Aon vs WTW](https://spot.insure/compare/aon-vs-wtw): all coverage lines, business roles, service and claims.
- [What Is Professional Errors and Omissions (E&O) Insurance?](https://spot.insure/coverage/professional-errors-omissions): Professional liability can help pay covered defense costs and losses when a client says your advice or service caused financial harm; check services and reporting terms.
- [Aon vs WTW Cargo and Transit Insurance](https://spot.insure/compare/aon-vs-wtw/cargo-transit)
- [Aon vs WTW Commercial Property Insurance](https://spot.insure/compare/aon-vs-wtw/commercial-property)
- [Aon vs WTW Crime Insurance](https://spot.insure/compare/aon-vs-wtw/crime)
- [Aon vs WTW Cyber Insurance](https://spot.insure/compare/aon-vs-wtw/cyber)
- [Aon vs WTW Employment Practices Liability Insurance](https://spot.insure/compare/aon-vs-wtw/employment-practices)
- [Aon vs WTW Management Liability Insurance](https://spot.insure/compare/aon-vs-wtw/management-liability)
- [Aon vs WTW Surety Bonds](https://spot.insure/compare/aon-vs-wtw/surety-bonds)
- [AIG vs Aon Professional Liability (E&O) Insurance](https://spot.insure/compare/aig-vs-aon/professional-errors-omissions)
- [AIG vs WTW Professional Liability (E&O) Insurance](https://spot.insure/compare/aig-vs-wtw/professional-errors-omissions)
- [Alliance Risk vs Aon Professional Liability (E&O) Insurance](https://spot.insure/compare/alliance-risk-vs-aon/professional-errors-omissions)
- [Alliance Risk vs WTW Professional Liability (E&O) Insurance](https://spot.insure/compare/alliance-risk-vs-wtw/professional-errors-omissions)
- [Aon vs At-Bay Professional Liability (E&O) Insurance](https://spot.insure/compare/aon-vs-at-bay/professional-errors-omissions)
- [Aon vs The Baldwin Group Professional Liability (E&O) Insurance](https://spot.insure/compare/aon-vs-baldwin/professional-errors-omissions)

## Sources for Aon vs WTW Professional Liability (E&O) Insurance

### Sources About Aon

1. [Commercial Risk Solutions U.S. Brokerage Terms of Service](https://www.aon.com/en/about/leadership-and-governance/brokerage-terms-of-service-for-commercial-risk-solutions-us). Aon; Lines 120–127: certain-program broker-of-record scope, consultation, application assistance, client signature and bind instruction, and account administration; lines 140–147: variable and contingent compensation, potential placement incentive, and client request route; lines 206–213: no price guarantee and surplus-lines limitations; lines 229–231: client insurer-notice duty unless separately agreed.. Accessed 2026-09-29.
2. [Middle Market Clients](https://www.aon.com/en/capabilities/middle-market-clients). Aon; Lines 125–132: mid-sized organizations and middle-market framing; lines 165–173: dedicated practice and North America statement; lines 188–224: Commercial Risk capabilities. No numeric company-size cutoff or U.S.-only eligibility rule is stated on the reviewed page.. Accessed 2026-09-29.
3. [Professional Services Practice](https://www.aon.com/en/capabilities/risk-transfer/professional-services-practice). Aon; Named professional-services audiences and global advisory role, lines 125–128; line offerings and explanations lines 131–190; contact link lines 120–122. Global practice page; no U.S. state or account-specific placement schedule.. Accessed 2026-09-30.

### Sources About WTW

4. [Manufacturing](https://www.wtwco.com/en-us/industries/manufacturing). WTW; “How WTW can help manufacturers”; “How we serve our clients”; North America licensed-entity disclaimer. Accessed 2026-09-28.
5. [Digital Infrastructure Protector](https://www.wtwco.com/en-us/solutions/products/digital-infrastructure-protector). WTW; Integrated policy coverage for building, operational property, marine and cargo under one policy; integrated data-center construction/operations; cyber and liability protection in broader solution; separate-policy preference caveat; capacity and North America licensed-entity disclaimer. Accessed 2026-09-29.
6. [Marine](https://www.wtwco.com/en-us/solutions/marine). WTW; “Our solutions” cargo brokerage; marine specialist count; claims advice and average-adjuster service; North America licensed-entity disclaimer. Accessed 2026-09-28.
7. [Residential | WTW](https://www.wtwco.com/en-us/industries/residential). WTW; “Specialized insurance products”: lists property insurance and financial lines, including errors and omissions; inspected official indexed text 2026-09-29. Direct reader access failed; indexed page crawl was about five months old.. Accessed 2026-09-29.
8. [WTW 2024 Form 10-K](https://www.sec.gov/Archives/edgar/data/1140536/000095017025026278/wtw-20241231.htm). U.S. Securities and Exchange Commission / Willis Towers Watson Public Limited Company; Part I, Item 1, FINEX and Surety business descriptions: the 2024 annual report identifies management and professional liability, employment practices, crime, cyber and M&A insurance solutions, and a global bond-placement team; indexed passages rechecked 2026-09-29.. Accessed 2026-09-29.
9. [Corporate Risk & Broking Brokerage Terms, Conditions & Disclosures (Canada & US)](https://www.wtwco.com/-/media/WTW/notices/BTCD-CRB-NA-June-2025.pdf). WTW; Document dated 2025-06-01; pp. 4–6: broker/intermediary role, quote versus binding process, review of binders/policies/endorsements, claims reporting and affiliate disclosures. Reused from the current WTW provider source record after direct PDF retrieval was blocked.. Accessed 2026-09-28.

### Sources for the Professional Liability (E&O) Insurance Guide

10. [FAQ: Professional liability insurance](https://www.tdi.texas.gov/commercial/pl-faq.html). Texas Department of Insurance; What’s professional liability coverage?; What types of damages…; What’s general liability insurance?; Do I need professional liability… if I have general liability…?; Is professional liability insurance required?; Can a client require…?; What’s the difference between occurrence policies and claims-made policies. Accessed 2026-09-16.
11. [Professional liability insurance](https://www.iii.org/article/professional-liability-insurance). Insurance Information Institute; Opening paragraphs (professional services/advice and E&O name); Claims not covered by general liability; What types of businesses need professional liability insurance?; What’s covered… and what’s not (claims-made versus occurrence, defense and judgments, non-financial/intentional limits, BOP/in-home exclusion). Accessed 2026-09-16.
12. [Get business insurance](https://www.sba.gov/counseling/launch-your-business/#business-insurance). U.S. Small Business Administration; Six common types of business insurance table. Accessed 2026-09-16.
13. [Professional Liability – US Direct Errors and Omissions Insurance](https://www.hiscox.com/documents/pl-sample-policy-wording.pdf). Hiscox Inc. specimen; About this Policy / Coverage for Claims Made Against You; I.A Insuring Agreement; I.B Defense; I.C Settlement; II.A Notice of Claims; II.C Optional Extended Reporting Period; III.A, III.K, III.M, III.R, III.S Exclusions; IV.A–B Limits and Deductible; VI.O Professional Services; VI.U Wrongful Act. Accessed 2026-09-16.

Updated 2026-09-30. Spot, a product of Tools for Enlightenment, publishes this research and works in the commercial insurance market. The comparison applies the same criteria to both providers. [Editorial policy](https://spot.insure/editorial-policy). To suggest a correction, [contact Spot](https://spot.insure/contact) with the page URL and supporting source.

## Aon Review Scores for 2026

Review Score: 6.1 / 10 from 3 rated sources, equally weighted.

Public ratings for Aon are low: Trustpilot shows 1.2 out of 5 from 782 reviews, and BBB shows 1.6 from five. Aon is a global firm, so those pages mostly reflect other parts of the business, not large U.S. commercial accounts.

- J.D. Power: Aon study score 822 (out of 1000). Historical 2017 large-commercial-broker study; U.S. and Canada commercial insurance decision-makers at large organizations. J.D. Power reports 2,506 evaluations across the study, not Aon-specific responses; the Aon respondent count is not stated. Period: 2017 study; ranked 3rd among large commercial brokers; study-wide population 2,506, not Aon review count. Checked 2026-09-29. [Diversity of Offerings Becomes Key Differentiator for Large Commercial Insurers, JD Power Finds](https://www.jdpower.com/business/press-releases/jd-power-2017-large-commercial-insurance-study)
- Trustpilot: TrustScore 1.2 (out of 5); 782 reviews. Global www.aon.com profile merged with other Aon profiles; mixed experiences include pensions, travel, professional indemnity and Australian business quotation service. The two latter complaints are individual unverified allegations, not evidence of U.S. commercial-placement outcomes or insurer fault. Trustpilot says reviews may not be representative because the company has not recently invited reviews. Period: Displayed 2026-09-29; page separately showed 198 reviews in the last 12 months. Checked 2026-09-29. [Aon Reviews](https://www.trustpilot.com/review/www.aon.com)
- BBB: BBB business grade B− (BBB letter grade; stated reason: failure to respond to two filed complaints). BBB of Chicago & Northern Illinois profile for Aon plc; the business grade is BBB’s own measure, not customer stars. Checked 2026-09-29. [Aon plc | BBB Business Profile](https://www.bbb.org/us/il/chicago/profile/insurance-companies/aon-plc-0654-5291)
- BBB: BBB customer review average 1.6 (out of 5); 5 reviews. BBB of Chicago & Northern Illinois customer reviews for Aon plc; some reviews are about employee-benefit and medical-expense issues. Period: checked 2026-09-29. Checked 2026-09-29. [Aon plc | BBB Reviews](https://www.bbb.org/us/il/chicago/profile/insurance-companies/aon-plc-0654-5291/customer-reviews)

Reviewed 2026-09-29. [Read the sourced review](https://spot.insure/insurance-providers/aon/reviews).

## WTW Review Scores for 2026

Review Score: 8.1 / 10 from 1 rated source, equally weighted.

WTW has little useful review evidence for a business buyer. Its one counted score is 807 out of 1,000 from a 2017 J.D. Power study of large commercial brokers, and Trustpilot's 2.1 from 9 reviews isn't counted.

- BBB: Complaints 4. BBB's Willis Towers Watson Chicago business profile; four complaints displayed for the preceding three years as of 2026-09-29. All four are marked unpursuable; displayed matters concern pension or employee-benefit administration, not commercial insurance brokerage placements. Period: Last three years; 0 closed in the last 12 months; BBB page reviewed 2026-09-29. Checked 2026-09-29. [Willis Towers Watson: Complaints](https://www.bbb.org/us/il/chicago/profile/insurance-companies/willis-towers-watson-0654-8000152/complaints)
- J.D. Power: 2017 Overall Broker Customer Satisfaction Index 807 (out of 1000). US/Canada large-commercial broker customer-satisfaction studies, 2016 and 2017 editions. They do not describe present service or WTW small-business clients. The 2017 release reports 2,506 evaluations across the study, not a WTW-specific sample. Period: 2017 study; 2 Power Circles; 2,506 study-wide evaluations, WTW-specific count not stated. Checked 2026-09-29. [2016 Large Commercial Insurance Study](https://www.jdpower.com/system/files/legacy/assets/2016244_large_comm_insurance_.pdf); [2017 Large Commercial Insurance Study](https://www.jdpower.com/system/files/legacy/assets/2017222_large_commercial_insurance.pdf); [2016 Large Commercial Insurance Study](https://www.jdpower.com/business/press-releases/2016-large-commercial-insurance-study); [Diversity of Offerings Becomes Key Differentiator for Large Commercial Insurers, J.D. Power Finds](https://www.jdpower.com/business/press-releases/jd-power-2017-large-commercial-insurance-study)
- Trustpilot: TrustScore 2.1 (out of 5); 9 reviews. Global wtwco.com company page; nine reviews and a 2.1/5 TrustScore on 2026-09-29. Visible reviews predominantly concern pensions, employee benefits, investments or international consumer interactions; not a US commercial-insurance buyer sample. Period: Displayed 2026-09-29. Checked 2026-09-29. [wtwco.com Reviews](https://www.trustpilot.com/review/www.wtwco.com)

Reviewed 2026-09-29. [Read the sourced review](https://spot.insure/insurance-providers/wtw/reviews).

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