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. 1,2
What Is Marsh?
Marsh suits technology and larger businesses seeking specialist cyber placement or broad global risk advice; small firms wanting a quick standard quote should compare its MMA route or digital agencies. 4,5,6,7
What Is Workers’ Compensation Insurance?
Workers’ compensation can pay medical care and part of an employee’s lost wages after a work-related injury or illness. If you have staff, check who is covered in each state; owners, contractors and some workers may be treated differently. 9,10,11,12
Key Differences in Workers’ Compensation Insurance
Construction Practice and Casualty Placement
Aon describes workers’ comp within a global construction practice for contractors, owners, engineers and project participants. Marsh McLennan Agency places the line within its broader casualty practice. The first record specifies a construction focus; the second situates the coverage among casualty lines. 3 8
Claims and Risk Analytics
Marsh McLennan Agency lists risk consulting, data-driven claims management and risk analytics across its casualty program, including workers’ comp. Aon describes project risk advice but does not detail workers’ comp claims analytics. Ask what injury trends, experience-modifier data and return-to-work support each service covers. 3 8
Specialist Engagement
Marsh McLennan Agency says clients work directly with a casualty specialist in an adviser-led placement. Aon describes global broking and market access without a quote flow. Confirm who handles submission and remains the claim contact after binding. 3 8
What to Confirm in Workers’ Compensation Insurance Quotes
Review Scores
These averages can combine ratings for different products, locations, and customer groups, including approximate BBB grade conversions. Read each review for the sources, scope, and calculation.
Aon
Review Score
3 rated sources
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.[4][6][7]
Read Aon reviewsMarsh
Review Score
2 rated sources
Marsh’s global Trustpilot profile has a poor 1.3/5 score. Treat it as a service warning to investigate with your proposed team; it does not isolate US commercial accounts.[2][4][7]
Read Marsh reviewsOffering Details
Aon vs Marsh: Workers’ Compensation Insurance: documented features by provider
| Criteria | Aon Workers’ Compensation brokerage and risk-advisory offering | Marsh McLennan Agency Workers' Compensation Insurance |
|---|---|---|
| Role in This Line | Aon says its global construction practice designs and places risk solutions and uses broking experience and a global network across construction insurance lines. For workers’ compensation, this is evidence of Aon’s brokered market offering; the page does not identify the insurer for a buyer’s placement. 3Company-reported. Aon’s global construction and infrastructure practice page. This establishes a marketed brokerage/advisory offering, not policy issuance or account-specific placement. | Marsh McLennan Agency (MMA) places workers' compensation insurance as one line within its broader casualty insurance practice. 8Company-reported. MMA casualty insurance page, Workers' Compensation subsection. |
| 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. 3Not found in reviewed sources. 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 page does not name a specific workers' compensation insurer. 8Not publicly disclosed. MMA casualty insurance page as read on 2026-09-23. |
| Who It’s For | Aon describes its global construction and infrastructure practice as serving contractors, owners, developers, engineers, architects, designers, financiers and investors, and says it works with organizations of varied sizes and complexity. 3Company-reported. Audience described for Aon’s global construction and infrastructure practice. It does not establish U.S. state availability or underwriting eligibility for a placement. | Confirm in your quote. |
| Coverage Features | Aon lists Workers’ Compensation Insurance among the construction coverage areas it brokers. The page does not describe state-specific statutory benefits, employer-liability terms or how a buyer’s policy responds. 3Company-reported. 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. | MMA says workers' compensation insurance provides coverage for medical expenses, lost wages and other costs in the event of an on-the-job injury or death. 8Company-reported. MMA casualty insurance page; brief, general description rather than a specific policy form. |
| 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. 3Not publicly disclosed. Aon’s global practice page as reviewed 2026-09-30; no quote, bond form or issued policy was reviewed. | Confirm in your quote. |
| Risk Services | Aon describes project risk-advisory services to understand project-specific risks and develop risk-transfer, management or mitigation strategies. It also describes a global construction team and market access. These are company-reported brokerage and advisory services, not coverage benefits. 3Company-reported. Company-reported advisory services on Aon’s global practice page; account-specific service scope is not stated. | MMA lists risk consulting, claims management using data analytics, and risk analytics as services it applies across its casualty program, which includes workers' compensation. 8Company-reported. MMA casualty insurance page, Casualty Coverage section; described for the casualty practice broadly, not exclusively for workers' compensation. |
| How to Apply | Confirm in your quote. | You work with an MMA casualty specialist directly; the page names an account manager contact and describes advisor-led placement rather than an online quote. 8Company-reported. MMA casualty insurance page. |
Full Comparison
More Aon vs Marsh Comparisons
Other Workers’ Compensation Insurance Comparisons
Sources
Aon
- Commercial Risk Solutions U.S. Brokerage Terms of Service. 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.
- 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.
- Construction and Infrastructure Insurance and Risk Management. Aon; Construction client audience and global placement role, lines 123–126; offering descriptions lines 135–156; coverage-area taxonomy lines 167–195; contact link lines 120–122. Global practice page; no U.S. state or account-specific placement schedule. Accessed 2026-09-30.
Marsh
- Marsh | Leader in risk, strategy, people, and investments. Marsh; Hero and capability tiles; FAQ: What does Marsh do?; industries served; Is Marsh the same as Marsh McLennan? January 2026 brand change. Accessed 2026-09-16.
- Compensation guide for US clients. Marsh; US broking segments; broker role; retail commissions, client fees, wholesale, insurer consulting, contingent and supplemental commissions; Marsh LLC and Marsh USA LLC; page 3: broker role and Marsh & McLennan Agency segment; page 7: copyright © 2024 Marsh LLC. Accessed 2026-09-16.
- Marsh McLennan Agency (MMA). Marsh; Middle-market US organizations; wholly-owned subsidiary; business insurance, employee health and benefits, retirement, private client. Accessed 2026-09-16.
- Technology | Insurance Broking & Risk Management. Marsh; Opening Technology Practice description; practice links including data center insurance, fintech and Stratus; Talk to us. Accessed 2026-09-16.
- Comprehensive Casualty Cover. Marsh McLennan Agency; Casualty Coverage section: Risk Consulting, Claims Management, Risk Analytics, Workers' Compensation subsection (coverage for medical expenses, lost wages, and more in the event of an on-the-job injury or death). Accessed 2026-09-23.
Workers’ Compensation Insurance Guide
- Workers’ Compensation Insurance. National Association of Insurance Commissioners; Opening definition; mandatory coverage except Texas opt-in; exclusive remedy; monopolistic state funds; self-insurance note. Accessed 2026-09-16.
- Small Business Insurance. National Association of Insurance Commissioners; Typically covers medical expenses, rehabilitation costs and lost wages; check with your state insurance department; ask these questions / who qualifies as a covered employee (contractors, part-time staff, interns); payroll and type-of-work rating factors. Accessed 2026-09-16.
- DWC employer information. California Department of Industrial Relations, Division of Workers’ Compensation; Opening trade-off and California requirement; basic benefits including medical care, temporary and permanent disability, supplemental job displacement, return-to-work supplement and death benefits; out-of-state employer note. Accessed 2026-09-16.
- Employer resources. Texas Department of Insurance, Division of Workers’ Compensation; In Texas, private employers can choose to carry workers’ compensation insurance coverage, but it is not required in most cases; lost wages and medical benefits; except when gross negligence results in a fatality, coverage limits liability. Accessed 2026-09-16.
