---
title: "Heffernan Insurance Brokers vs USI Insurance Services: Professional Liability (E&O) Insurance"
description: "USI runs a CPA-specific program underwritten by CNA with bundled risk-management resources, while Heffernan's small-business division places E&O for a broader industry list without naming an insurer."
canonical: "https://spot.insure/compare/heffernan-vs-usi/professional-errors-omissions"
page-type: "line-comparison"
updated-at: "2026-09-25"
comparison-pair: "heffernan-vs-usi"
provider-a: "heffernan"
provider-b: "usi"
coverage-line: "professional-errors-omissions"
---

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

## Agent Guide

**What this page is:** Focused comparison of Heffernan Insurance Brokers and USI Insurance Services 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 Heffernan Insurance Brokers versus USI Insurance Services. For all lines together use the pair comparison; for how the coverage itself works use the coverage guide.

**Questions this page answers:**
- Heffernan Insurance Brokers vs USI Insurance Services for Professional Liability (E&O) Insurance: how do they differ?
- Which is better for Professional Liability (E&O) Insurance, Heffernan Insurance Brokers or USI Insurance Services?
- What does Heffernan Insurance Brokers or USI Insurance Services publish about Professional Liability (E&O) Insurance (limits, eligibility, claims, add-ons)?

**Key facts:**
- Line: Professional Liability (E&O) Insurance. Providers: Heffernan Insurance Brokers and USI Insurance Services.
- Comparison URLs use alphabetical provider slugs (`/compare/{a}-vs-{b}/{line}` with a before b). A reversed pair redirects permanently to the alphabetical one.

**Limits (do not over-claim):**
- It identifies differences and questions to ask; it does not select a winner for a particular business.
- 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; last updated 2026-09-25.

**Related pages:**
- [Heffernan Insurance Brokers vs USI Insurance Services](https://spot.insure/compare/heffernan-vs-usi) — all coverage lines for this pair
- [Professional Liability (E&O) Insurance guide](https://spot.insure/coverage/professional-errors-omissions) — how this coverage works
- [Heffernan Insurance Brokers profile](https://spot.insure/insurance-providers/heffernan) — provider profile
- [USI Insurance Services profile](https://spot.insure/insurance-providers/usi) — provider profile

# Heffernan Insurance Brokers vs USI Insurance Services: How Do They Compare for Professional Liability (E&O) Insurance?

CPA firms get a dedicated program from USI Insurance Services, underwritten by CNA with risk-management resources. Heffernan Insurance Brokers serves sole proprietors through fast-growing companies and will research a custom package for industries not listed.

USI's AICPA program serves CPA firms with risk-management resources; Heffernan builds E&O packages across a broader small-business industry list.

## Heffernan Insurance Brokers vs USI Insurance Services Professional Liability (E&O) Insurance Summary

USI runs a CPA-specific program underwritten by CNA with bundled risk-management resources, while Heffernan's small-business division places E&O for a broader industry list without naming an insurer. [2](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") [1](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance")

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

### A Named Carrier for One Client Type

USI's page states its AICPA Professional Liability Program is underwritten by CNA, a named carrier, but only for CPA firms enrolled in that program; its separate Business Services practice brokers E&O for other business types without naming an insurer. [2](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") Heffernan's small-business page names no insurer for any of the industries on its list. [1](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance")

### Who Qualifies

USI has offered CPA coverage since 1967 and been the endorsed AICPA Program provider since 1994, so the CNA-underwritten program applies specifically to accounting firms. [2](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") Heffernan instead serves sole proprietors through fast-growing companies in construction, food, health care, hospitality, nonprofits, real estate, technology, transportation, and vintners and growers, none of which is tied to a professional-association endorsement. [1](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance")

### What's Bundled With the Policy

USI says firms enrolled in the AICPA program get supportive claims handling and exclusive access to risk-management resources, including engagement-letter templates:

USI says firms enrolled in the program get supportive claims handling and exclusive access to risk-management resources, including engagement-letter templates, in addition to the coverage itself. [2](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") (Evidence: Company-reported; scope: Program page description..)

Heffernan's page describes no comparable bundled resource; it says only that it will research and build a custom package for industries not already on its list. [1](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance")

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

- If you're a CPA firm, ask USI whether you're placed in the CNA-underwritten AICPA program or its general Business Services E&O line. [2](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") [4](https://www.usi.com/property-casualty/business-services/ "Business Services")
- Ask Heffernan which carriers it typically places E&O with for your industry. [1](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance")
- Ask USI which risk-management resources apply if your business isn't a CPA firm. [4](https://www.usi.com/property-casualty/business-services/ "Business Services")
- Ask Heffernan for a premium range and limit, since its page publishes neither. [1](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance")

## Heffernan Insurance Brokers vs USI Insurance Services Professional Liability (E&O) Compared

| Criteria | Heffernan Professional Errors and Omissions Brokerage | AICPA Professional Liability Program (USI Affinity) |
| --- | --- | --- |
| Who It’s For | 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. [1](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance") (Evidence: Company-reported; scope: 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..) | USI markets the AICPA program to sole practitioners and regional CPA firms. It has offered CPA coverage since 1967 and has been the endorsed AICPA Program provider since 1994. [2](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") (Evidence: Company-reported; scope: Program page description..) |
| How to Apply | 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. [1](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance") (Evidence: Company-reported; scope: Small Business Insurance page as read on 2026-09-23..) | USI directs CPA firms seeking a quote or renewal to contact USI Affinity, with a dedicated Affinity_APL@usi.com address for the AICPA program specifically. [2](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") (Evidence: Company-reported; scope: Contact instructions on the AICPA program page..) |
| Coverage Features | 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. [1](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance") (Evidence: Company-reported; scope: Small Business Insurance page as read on 2026-09-23; the page does not list specific exclusions, claims-made versus occurrence form, or endorsements..) | USI describes the policy as insuring a CPA and their practice against third-party claims that professional services caused financial harm, providing a defense and paying damages for covered claims arising from high-risk situations tied to new clients, changing business plans, or new laws and regulations. [2](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") (Evidence: Company-reported; scope: Program page description; actual insuring agreements, exclusions and conditions are set by the issued CNA policy form..) |
| Role in This Line | Heffernan lists errors and omissions among the coverages its small-business division places for clients, shopping the line with insurers rather than underwriting it. [1](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance") (Evidence: Company-reported; scope: Small Business Insurance page as read on 2026-09-23; no dedicated professional-E&O product page was found..) | For CPA firms, USI runs the AICPA Professional Liability Program through its USI Affinity division as the endorsed producer, rather than underwriting the policy itself. USI's general Business Services practice separately brokers errors and omissions/professional liability coverage for other business types. [2](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") [4](https://www.usi.com/property-casualty/business-services/ "Business Services") (Evidence: Company-reported; scope: AICPA program page and Business Services practice page..) |

## About Heffernan Insurance Brokers and USI Insurance Services

- [Heffernan Insurance Brokers company profile](https://spot.insure/insurance-providers/heffernan) · [Heffernan Insurance Brokers customer reviews](https://spot.insure/insurance-providers/heffernan/reviews)
- [USI Insurance Services company profile](https://spot.insure/insurance-providers/usi) · [USI Insurance Services customer reviews](https://spot.insure/insurance-providers/usi/reviews)
- [What Is Professional Errors and Omissions (E&O) Insurance?](https://spot.insure/coverage/professional-errors-omissions)

## Related Pages for Heffernan Insurance Brokers vs USI Insurance Services

- [Heffernan Insurance Brokers vs USI Insurance Services](https://spot.insure/compare/heffernan-vs-usi): 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.
- [Heffernan Insurance Brokers Professional Liability (E&O) Insurance](https://spot.insure/insurance-providers/heffernan/professional-errors-omissions)
- [USI Insurance Services Professional Liability (E&O) Insurance](https://spot.insure/insurance-providers/usi/professional-errors-omissions)

## Sources for Heffernan Insurance Brokers vs USI Insurance Services

### Sources About Heffernan Insurance Brokers

1. [Small Business Insurance](https://www.heffins.com/business-insurance/small-business/). 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.

### Sources About USI Insurance Services

2. [Accountants Professional Liability — USI Affinity](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/). USI Insurance Services; Quality Professional Liability Insurance Exclusively for CPA Firms; "The AICPA Professional Liability Program, underwritten by CNA, has been offering coverage to CPAs since 1967 and has been the endorsed provider of the AICPA Program since 1994."; supportive claims handling and exclusive access to extensive risk management resources, including engagement letter templates; Email Affinity_APL@usi.com. Accessed 2026-09-23.
3. [USI Specialty Program Solutions](https://www.usi.com/programs/). USI Insurance Services; USI Affinity delivers high-quality insurance and financial solutions to members of affinity organizations and targeted industry segments...for professional associations, law firms, alumni and collegiate organizations, travel groups, and insurance administrators.. Accessed 2026-09-23.
4. [Business Services](https://www.usi.com/property-casualty/business-services/). USI Insurance Services; USI advises clients...and provides solutions for...Errors & Omissions/Professional Liability.... Accessed 2026-09-23.

Updated 2026-09-25. 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.

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