Aon vs Hub International: Professional Liability / E&O Insurance

Both are brokers. HUB International names accounting, law, medical, real estate, engineering and contracting buyers and offers no online quote flow, while Aon concentrates on law, accounting and consulting firms.

Kearny Risk organizes these comparisons for firms whose advice, content or technology creates professional exposures.Research updated 2026-09-30

Areas of coverage

Aon

  • role: 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. Aon’s global professional-services practice page. This establishes a marketed brokerage/advisory offering, not policy issuance or account-specific placement.company-reportedSource ↗
  • eligibility: 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. Audience described for Aon’s global professional-services practice. It does not establish U.S. state availability or underwriting eligibility for a placement.company-reportedSource ↗
  • coverage: 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. 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.company-reportedSource ↗
  • 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. Company-reported advisory services on Aon’s global practice page; account-specific service scope is not stated.company-reportedSource ↗
  • 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. 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.not-foundSource ↗
  • limits: 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. Aon’s global practice page as reviewed 2026-09-30; no quote, bond form or issued policy was reviewed.not-disclosedSource ↗

HUB International

  • role: HUB brokers professional liability, which it also calls errors and omissions (E&O) insurance, rather than underwriting the coverage itself. Professional liability and E&O product pages as read 2026-09-23; neither names an issuing insurer.company-reportedSource ↗Source ↗
  • coverage: HUB says professional liability/E&O policies it arranges can cover defense costs, judgments, settlements and fines from allegations of misrepresentation, breach of professional services, wrongful business practices, misleading advice and conflict of interest, plus libel, slander or lost-profit claims; intentional acts and employment claims are typically excluded. Product-page coverage description; the issued policy and its exclusions control an actual claim.company-reportedSource ↗
  • eligibility: HUB names accounting, law, medical, financial-advisory, real estate, architecture and engineering, consulting, and contracting businesses as typical E&O buyers, and separately lists technology among nine industries its E&O practice serves. Combined professional-liability and E&O industry lists; not a published underwriting appetite by state.company-reportedSource ↗Source ↗
  • coverage: HUB says E&O policies are typically claims-made with per-claim and aggregate limits, can be structured with prior-acts coverage back to a retroactive date, and can offer tail coverage for an extended reporting period; coverage can extend to independent contractors and temporary staff performing work for the business. E&O product-page structure description; specific limits and retroactive dates are set on the quote and declarations.company-reportedSource ↗
  • insurer: Neither the professional liability nor the E&O product page names an issuing insurer; HUB places this coverage with insurers that vary by client and placement. Checked both pages on 2026-09-23; no carrier is disclosed on either.not-foundSource ↗Source ↗
  • claims: HUB's E&O page tells policyholders to notify their broker and carrier as soon as possible after an incident and submit documentation including a narrative of the events leading up to the claim. E&O product-page claims-notification guidance; a general process description, not an outcome measurement.company-reportedSource ↗
  • application: HUB directs prospects to connect with a broker; the pages describe professional liability/E&O policies as customized to business size, industry, location, risk base and desired limits, without an online quote flow. Product-page call to action and customization description as read 2026-09-23.company-reportedSource ↗Source ↗

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

Coverage and Policy Design

Aon describes professional liability as a structure tailored to firms’ needs, but does not specify a claims trigger or reporting period in its overview. HUB says the E&O policies it arranges are typically claims-made, with per-claim and aggregate limits, and can include prior-acts coverage to a retroactive date or tail coverage for an extended reporting period. HUB also says coverage can extend to contractors and temporary staff. Those options matter when switching carriers or staffing flexibly. [1] [3]

Buying Route and Terms

HUB names accounting, law, medical, financial-advisory, real-estate, architecture, engineering, consulting and contracting firms among typical E&O buyers, while Aon’s professional-services practice names law, accounting and consulting. HUB directs prospects to a broker and customizes for business size, industry, location and desired limits; Aon likewise describes advisor placement. Compare the retroactive date, tail price and insured-person wording on the actual policies. [1] [3]

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

  • Ask HUB for the retroactive date, tail options and whether your contractors are insured for their work. [1] [3]
  • Ask Aon to specify claims-made terms and coverage for temporary staff in the proposed form. [1] [3]

Aon describes tailored E&O placement for professional firms. HUB says its brokered policies are typically claims-made, may include prior acts or tail coverage and can cover contractors and temporary staff.

Sources reviewed

  1. 01
    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

  2. 02
    Professional Liability – US Direct Errors and Omissions Insurance

    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

  3. 03
    Errors and Omissions (E&O) Insurance Coverage

    HUB International · Industries served list including accounting, architecture, creative, dental, engineering, financial, medical, media and technology; prior-acts coverage; claims-made structure with per-claim and aggregate limits and tail coverage; claims-notification steps · accessed 2026-09-23

  4. 04
    Professional Liability Insurance Brokers

    HUB International · What is professional liability?; Who Needs Professional Liability Insurance Coverage?; How Can You Limit Your Exposure to Professional Liability?; exclusions; Connect With a Broker · accessed 2026-09-23

  5. 05
    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

  6. 06
    FAQ: Professional liability insurance

    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

  7. 07
    Get business insurance

    U.S. Small Business Administration · Six common types of business insurance table · accessed 2026-09-16

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