Aon vs Heffernan: Professional Liability / E&O Insurance

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

Coverage and Policy Design

Aon says its professional-services practice tailors E&O structures to the firm’s needs and names law, accounting and consulting firms as its audience. Heffernan describes E&O as protection for claims that a company’s product or service problem caused a client financial loss. Its small-business division serves sole proprietors through fast-growing companies in fields including construction, health, hospitality, real estate and technology. The two descriptions offer different levels of industry specificity; ask both about your actual service. [1] [2]

Buying Route and Terms

Heffernan says it shops coverage with insurers, can custom-design a package for industries not listed and asks buyers to contact its small-business team for a quote. Aon likewise describes a brokerage/advisory role. Neither reviewed record publishes E&O limits, retentions or carrier identity for an account. Heffernan’s custom-package route may be useful for an unlisted industry, but the proposed form still determines scope. Compare insurer, insured services and exclusions. [1] [2]

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

Ask Heffernan which carrier and form would cover your product or service and request the limit schedule. [1] [2]
Ask Aon to identify the insurer and show how your services and client financial-loss claims are defined. [1] [2]

Aon says it tailors professional-liability structures for law, accounting and consulting firms. Heffernan describes E&O for product or service problems causing client financial loss and serves businesses across many industries.

Sources reviewed

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
02
Small Business Insurance
Heffernan Insurance Brokers · The types of coverage we can provide include... Errors and omissions protects against claims for problems with your product or service that result in a financial loss; industries served list; Specialty Programs; contact for custom-designed packages · accessed 2026-09-23
03
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
04
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
05
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
06
Get business insurance
U.S. Small Business Administration · Six common types of business insurance table · accessed 2026-09-16

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 ↗

Heffernan Insurance Brokers

role: Heffernan lists errors and omissions among the coverages its small-business division places for clients, shopping the line with insurers rather than underwriting it. Small Business Insurance page as read on 2026-09-23; no dedicated professional-E&O product page was found.company-reportedSource ↗
coverage: Heffernan describes errors and omissions coverage as protecting against claims for problems with a company's product or service that result in a financial loss to a client. Small Business Insurance page as read on 2026-09-23; the page does not list specific exclusions, claims-made versus occurrence form, or endorsements.company-reportedSource ↗
eligibility: Heffernan's small-business division says it serves sole proprietors through fast-growing companies across industries including construction, food, health care, hospitality, nonprofits, real estate, technology, transportation, and vintners and growers, and will custom-design a package for industries not listed. Small Business Insurance page as read on 2026-09-23; not exclusively E&O-specific, but describes the buyer base for the page listing this coverage.company-reportedSource ↗
limits: The reviewed page does not publish limits, retentions, or premium ranges for errors and omissions coverage. Small Business Insurance page as read on 2026-09-23.not-disclosedSource ↗
application: Heffernan directs small-business buyers to contact the firm's small-business division to request a quote and says it will research and build a custom package for industries not already listed. Small Business Insurance page as read on 2026-09-23.company-reportedSource ↗