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 McLennan Agency?
Marsh McLennan Agency provides business insurance and employee health and benefits, alongside retirement, wealth, and private-client services across the United States and Canada. Its US small-business page lists six common coverage types and directs buyers to request a personalized quote by phone; the insurer and terms for a specific placement must be confirmed in the proposal. 4,5
Read the Marsh McLennan Agency profile
Read the Marsh McLennan Agency Workers’ Compensation Insurance page
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. 7,8,9,10
Key Differences in Workers’ Compensation Insurance
Construction Advice and Agency Consultation
Aon describes a global construction practice that places workers’ comp and advises on project risk for contractors, owners and engineers. Marsh McLennan Agency describes arranging workers’ comp for commercial organizations and invites buyers to discuss placement with an adviser. The difference is a sector-specific project practice versus a direct consultation route. 3 6
State and Class Eligibility
Marsh McLennan Agency says state and class eligibility are placement-specific and describes safety and prevention support alongside workers’ comp. Aon lists the coverage but does not detail statutory benefits or state rules. Ask for accepted classes and forms for every workforce location. 3 6
Placement Details
Aon and Marsh McLennan Agency both describe adviser-led placement but neither names the issuing carrier or binding timeline for an account. Request the proposed insurer, quote milestones and certificate timing before a project start. 3 6
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 McLennan Agency
Review Score
2 rated sources
There are almost no public customer reviews of Marsh McLennan Agency (MMA). Trustpilot shows 3.2 out of 5, but from a single review, and BBB shows an A grade with four complaints closed in three years.[8][9][1]
Read Marsh McLennan Agency reviewsOffering Details
Aon vs Marsh McLennan Agency: Workers’ Compensation Insurance: documented features by provider
| Criteria | Aon Workers’ Compensation brokerage and risk-advisory offering | Marsh McLennan Agency workers compensation (official overview) |
|---|---|---|
| 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 describes arranging workers compensation for the audience stated on the cited product page. 6Company-reported. workers compensation marketed by marsh-mclennan-agency; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement. |
| 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. | Confirm in your quote. |
| 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. | Businesses seeking commercial insurance and risk-management support; exact state and class eligibility is placement-specific. 6Company-reported. workers compensation marketed by marsh-mclennan-agency; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement. |
| 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. | The cited product page describes workers' compensation as a business coverage option, alongside risk-management support focused on safety and prevention. Marketing description only; actual coverage, exclusions, conditions, limits, and availability depend on the issued policy and jurisdiction. 6Company-reported. workers compensation marketed by marsh-mclennan-agency; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement. |
| 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. | The cited overview does not set a universal limit or retention for this line. Ask for the proposed policy form, limits, retentions, exclusions, and conditions in the quote. 6Not publicly disclosed. Only the cited marketing page was reviewed for published limit and retention information; no policy-form entitlement is inferred. |
| 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. | Confirm in your quote. |
| How to Apply | Confirm in your quote. | The page invites organizations to contact a Marsh McLennan Agency adviser or specialist to discuss placement. The page does not establish a quote, bind, or coverage-effective timeline. 6Company-reported. workers compensation marketed by marsh-mclennan-agency; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement. |
Full Comparison
More Aon vs Marsh McLennan Agency 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 McLennan Agency
- Who We Are. Marsh McLennan Agency; Lines 193-195: ‘a business of Marsh’ and company-listed service lines across US and Canada. This does not establish the legal entity for an account, corporate ownership chart, or insurer role. Accessed 2026-09-29.
- Small Business Insurance Solutions. Marsh McLennan Agency; Lines 205-207: small-business audience and call invitation; lines 224-249 list six coverage categories and short descriptions; line 264 is an embedded form whose function is not stated. No form submitted. Accessed 2026-09-29.
- Business Insurance | MMA. Marsh McLennan Agency; Workers' compensation is named among business coverage options; risk services address safety and prevention. Accessed 2026-09-30.
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.
