---
title: "HUB International vs USI Insurance Services Professional Liability (E&O) Insurance"
description: "USI names CNA as underwriter for its AICPA-endorsed CPA program, while HUB's broader E&O brokerage doesn't name an insurer for any industry it serves."
canonical: "https://spot.insure/compare/hub-international-vs-usi/professional-errors-omissions"
page-type: "line-comparison"
updated-at: "2026-09-23"
---

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# HUB International vs USI Insurance Services Professional Liability (E&O) Insurance

USI names CNA as underwriter for its AICPA-endorsed CPA program, while HUB's broader E&O brokerage doesn't name an insurer for any industry it serves.

## Research Scope and Use

Use this comparison to evaluate HUB International and USI Insurance Services for Professional Liability (E&O) Insurance against the same documented criteria. It identifies differences and questions to confirm; it does not select a winner for a particular business. Offering claims are what each provider publishes about this line unless marked otherwise. “Not found” describes the evidence reviewed, not proof that a feature is unavailable. Confirm the insurer, policy wording, limits, retentions, exclusions and cost in an actual quote.

## Summary

USI's AICPA Professional Liability Program is underwritten by CNA specifically for CPA firms, while HUB brokers E&O across accounting, legal, medical, real estate and engineering industries without naming an insurer. [9](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") [4](https://www.hubinternational.com/products/business-insurance/professional-liability-insurance/ "Professional Liability Insurance Brokers") [5](https://www.hubinternational.com/products/business-insurance/errors-and-omissions/ "Errors and Omissions (E&O) Insurance Coverage")

## What Is HUB International?

HUB International is a North American insurance brokerage that arranges business insurance, employee benefits and related risk services through local offices and specialist practices. Smaller commercial accounts may be sent to Insureon for an online quote; other programs are handled by HUB advisors, with policy terms set by the insurers they use. [1](https://www.hubinternational.com/about-us/ "About Us") [2](https://www.hubinternational.com/contact-us/ "Contact Us") [3](https://www.hubinternational.com/industries/technology-company-insurance/ "Insurance for Technology Companies")

[HUB International profile](https://spot.insure/insurance-providers/hub-international)

## What Is USI Insurance Services?

USI Insurance Services is a U.S. insurance brokerage and consulting firm that arranges property and casualty, employee benefits, personal risk, and retirement programs. Its Technology practice says it works with software, hardware, and related companies from early seed stage through IPO, using a consultative process rather than a published self-serve quote. [6](https://www.usi.com/about-usi "The Power of ONE") [7](https://www.usi.com/property-casualty/technology/ "Technology Insurance") [8](https://www.usi.com/commissions-fees/ "Commissions and Fees")

[USI Insurance Services profile](https://spot.insure/insurance-providers/usi)

## What Is Professional Errors and Omissions (E&O) Insurance?

Professional errors and omissions (E&O) insurance, also called professional liability insurance, addresses claims that professional services or advice caused a client financial loss. What's covered depends on the services actually scheduled in the policy, not the product label alone. [12](https://www.tdi.texas.gov/commercial/pl-faq.html "FAQ: Professional liability insurance") [13](https://www.iii.org/article/professional-liability-insurance "Professional liability insurance") [14](https://www.sba.gov/counseling/launch-your-business/#business-insurance "Get business insurance") [15](https://www.hiscox.com/documents/pl-sample-policy-wording.pdf "Professional Liability – US Direct Errors and Omissions Insurance")

## Key Differences in Professional Liability (E&O) Insurance

### Who Underwrites the Policy

USI names an insurer for one specific program: the AICPA Professional Liability Program it runs through USI Affinity.

USI's own page states that the AICPA Professional Liability Program is "underwritten by CNA," naming the carrier for that specific program. USI's general Business Services E&O placements do not name an insurer. [9](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") (Evidence: Company-reported; scope: Direct quote from the AICPA program page; CNA underwrites only this named program, not USI's other professional-liability placements..)

That naming applies only to the CPA-focused AICPA program; USI's general Business Services E&O placements for other business types don't disclose a carrier. HUB's professional liability and E&O pages likewise don't name an insurer for any of the industries its brokerage serves, on either product page it publishes. [4](https://www.hubinternational.com/products/business-insurance/professional-liability-insurance/ "Professional Liability Insurance Brokers") [5](https://www.hubinternational.com/products/business-insurance/errors-and-omissions/ "Errors and Omissions (E&O) Insurance Coverage")

### Program Scope Versus General Brokerage

USI's AICPA program is built around one profession: it has offered CPA firms coverage since 1967 and has been the endorsed AICPA Program provider since 1994, pairing the policy with claims handling and risk-management resources such as engagement-letter templates. [9](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") HUB instead brokers professional liability/E&O broadly, naming accounting, law, medicine, financial advisory, real estate, architecture and engineering, consulting and contracting among the industries it serves, and describes policy-structure features like prior-acts and tail coverage that can extend to independent contractors and temporary staff. [4](https://www.hubinternational.com/products/business-insurance/professional-liability-insurance/ "Professional Liability Insurance Brokers") [5](https://www.hubinternational.com/products/business-insurance/errors-and-omissions/ "Errors and Omissions (E&O) Insurance Coverage")

### How You Reach Each Broker

USI gives CPA firms a dedicated email channel for the AICPA program, distinct from its general Business Services E&O work. [9](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") HUB's pages point prospects toward connecting with a broker generally, describing coverage as customized to business size, industry, location, risk base and desired limits rather than offering a program-specific contact or an online quote. [4](https://www.hubinternational.com/products/business-insurance/professional-liability-insurance/ "Professional Liability Insurance Brokers")

## What to Confirm in Professional Liability (E&O) Insurance Quotes

- If you're a CPA firm, confirm whether USI would place you in the CNA-underwritten AICPA program or a different market. [9](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity")
- Ask HUB which insurer it intends to place your policy with, since none is named on its product pages. [4](https://www.hubinternational.com/products/business-insurance/professional-liability-insurance/ "Professional Liability Insurance Brokers")
- Ask USI whether the AICPA program's claims-handling and risk-management resources, like engagement-letter templates, apply outside that specific program. [9](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity")
- Ask HUB for the prior-acts retroactive date and tail-coverage terms being offered, and whether contractors or temporary staff are included. [5](https://www.hubinternational.com/products/business-insurance/errors-and-omissions/ "Errors and Omissions (E&O) Insurance Coverage")
- Get limits, retentions and premium in writing from both, since neither publishes them. [9](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") [4](https://www.hubinternational.com/products/business-insurance/professional-liability-insurance/ "Professional Liability Insurance Brokers")

## Offering Details

| Criteria | HUB International Professional Liability (E&O) Insurance Brokerage | AICPA Professional Liability Program (USI Affinity) |
| --- | --- | --- |
| Role in This Line | HUB brokers professional liability, which it also calls errors and omissions (E&O) insurance, rather than underwriting the coverage itself. [4](https://www.hubinternational.com/products/business-insurance/professional-liability-insurance/ "Professional Liability Insurance Brokers") [5](https://www.hubinternational.com/products/business-insurance/errors-and-omissions/ "Errors and Omissions (E&O) Insurance Coverage") (Evidence: Company-reported; scope: Professional liability and E&O product pages as read 2026-09-23; neither names an issuing insurer..) | 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. [9](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") [11](https://www.usi.com/property-casualty/business-services/ "Business Services") (Evidence: Company-reported; scope: AICPA program page and Business Services practice page..) |
| Issuing 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. [4](https://www.hubinternational.com/products/business-insurance/professional-liability-insurance/ "Professional Liability Insurance Brokers") [5](https://www.hubinternational.com/products/business-insurance/errors-and-omissions/ "Errors and Omissions (E&O) Insurance Coverage") (Evidence: Not found in reviewed sources; scope: Checked both pages on 2026-09-23; no carrier is disclosed on either..) | USI's own page states that the AICPA Professional Liability Program is "underwritten by CNA," naming the carrier for that specific program. USI's general Business Services E&O placements do not name an insurer. [9](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") (Evidence: Company-reported; scope: Direct quote from the AICPA program page; CNA underwrites only this named program, not USI's other professional-liability placements..) |
| Who It’s For | 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. [4](https://www.hubinternational.com/products/business-insurance/professional-liability-insurance/ "Professional Liability Insurance Brokers") [5](https://www.hubinternational.com/products/business-insurance/errors-and-omissions/ "Errors and Omissions (E&O) Insurance Coverage") (Evidence: Company-reported; scope: Combined professional-liability and E&O industry lists; not a published underwriting appetite by state..) | 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. [9](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") (Evidence: Company-reported; scope: Program page description..) |
| Coverage Features | 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. [4](https://www.hubinternational.com/products/business-insurance/professional-liability-insurance/ "Professional Liability Insurance Brokers") (Evidence: Company-reported; scope: Product-page coverage description; the issued policy and its exclusions control an actual claim..)<br><br>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. [5](https://www.hubinternational.com/products/business-insurance/errors-and-omissions/ "Errors and Omissions (E&O) Insurance Coverage") (Evidence: Company-reported; scope: E&O product-page structure description; specific limits and retroactive dates are set on the quote and declarations..) | 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. [9](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..) |
| Limits and Retentions | Not described in the reviewed sources. | The AICPA program page does not publish limit, retention or premium figures; it says coverage plans allow a firm to tailor coverage to its risk profile. [9](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") (Evidence: Not publicly disclosed; scope: Page as read on 2026-09-23..) |
| Risk Services | Not described in the reviewed sources. | 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. [9](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 | 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. [4](https://www.hubinternational.com/products/business-insurance/professional-liability-insurance/ "Professional Liability Insurance Brokers") [5](https://www.hubinternational.com/products/business-insurance/errors-and-omissions/ "Errors and Omissions (E&O) Insurance Coverage") (Evidence: Company-reported; scope: Product-page call to action and customization description as read 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. [9](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..) |
| Claims Support | 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. [5](https://www.hubinternational.com/products/business-insurance/errors-and-omissions/ "Errors and Omissions (E&O) Insurance Coverage") (Evidence: Company-reported; scope: E&O product-page claims-notification guidance; a general process description, not an outcome measurement..) | Not described in the reviewed sources. |

## Full Comparison

- [HUB International vs USI Insurance Services](https://spot.insure/compare/hub-international-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 E&O insurance addresses claims that a mistake in your advice or services caused a client financial loss.
- [HUB International vs USI Insurance Services Commercial Property Insurance](https://spot.insure/compare/hub-international-vs-usi/commercial-property)
- [HUB International vs USI Insurance Services Crime Insurance](https://spot.insure/compare/hub-international-vs-usi/crime)
- [HUB International vs USI Insurance Services Cyber Insurance](https://spot.insure/compare/hub-international-vs-usi/cyber)
- [HUB International vs USI Insurance Services D&O Insurance](https://spot.insure/compare/hub-international-vs-usi/directors-officers)
- [HUB International vs USI Insurance Services Employee Health Benefits](https://spot.insure/compare/hub-international-vs-usi/employee-health-benefits)
- [HUB International vs USI Insurance Services Employment Practices Liability Insurance](https://spot.insure/compare/hub-international-vs-usi/employment-practices)
- [HUB International vs USI Insurance Services Fiduciary Liability Insurance](https://spot.insure/compare/hub-international-vs-usi/fiduciary)
- [HUB International vs USI Insurance Services Management Liability Insurance](https://spot.insure/compare/hub-international-vs-usi/management-liability)
- [HUB International vs USI Insurance Services Medical Malpractice Insurance](https://spot.insure/compare/hub-international-vs-usi/medical-malpractice)
- [HUB International vs USI Insurance Services Representations and Warranties Insurance](https://spot.insure/compare/hub-international-vs-usi/representations-warranties)
- [HUB International vs USI Insurance Services Surety Bonds](https://spot.insure/compare/hub-international-vs-usi/surety-bonds)
- [HUB International vs USI Insurance Services Workers’ Compensation Insurance](https://spot.insure/compare/hub-international-vs-usi/workers-compensation)
- [Alliance Risk vs HUB International Professional Liability (E&O) Insurance](https://spot.insure/compare/alliance-risk-vs-hub-international/professional-errors-omissions)
- [Alliance Risk vs USI Insurance Services Professional Liability (E&O) Insurance](https://spot.insure/compare/alliance-risk-vs-usi/professional-errors-omissions)
- [At-Bay vs HUB International Professional Liability (E&O) Insurance](https://spot.insure/compare/at-bay-vs-hub-international/professional-errors-omissions)
- [At-Bay vs USI Insurance Services Professional Liability (E&O) Insurance](https://spot.insure/compare/at-bay-vs-usi/professional-errors-omissions)
- [Beazley vs HUB International Professional Liability (E&O) Insurance](https://spot.insure/compare/beazley-vs-hub-international/professional-errors-omissions)
- [Beazley vs USI Insurance Services Professional Liability (E&O) Insurance](https://spot.insure/compare/beazley-vs-usi/professional-errors-omissions)

## Sources

### HUB International

1. [About Us](https://www.hubinternational.com/about-us/). HUB International; Opening description; 1998 formation of HUB International Limited; 2022 Insureon acquisition; headquarters and employee/office counts. Accessed 2026-09-16.
2. [Contact Us](https://www.hubinternational.com/contact-us/). HUB International; Business Solutions paths for Commercial Insurance Solutions versus Small Commercial Insurance Solutions via Insureon; office search. Accessed 2026-09-16.
3. [Insurance for Technology Companies](https://www.hubinternational.com/industries/technology-company-insurance/). HUB International; Technology Company Insurance & Risk Management: startup, software, hardware and digital-media introduction; Business Coverage and People Protection lists; technology-client count. Accessed 2026-09-16.
4. [Professional Liability Insurance Brokers](https://www.hubinternational.com/products/business-insurance/professional-liability-insurance/). 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. [Errors and Omissions (E&O) Insurance Coverage](https://www.hubinternational.com/products/business-insurance/errors-and-omissions/). 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.

### USI Insurance Services

6. [The Power of ONE](https://www.usi.com/about-usi). USI Insurance Services; History, client-count, nationwide office, and P&C / benefits / personal risk / retirement description. Accessed 2026-09-16.
7. [Technology Insurance](https://www.usi.com/property-casualty/technology/). USI Insurance Services; Technology practice client types, seed-to-IPO range, and listed insurance placement lines including PrivaSafe. Accessed 2026-09-16.
8. [Commissions and Fees](https://www.usi.com/commissions-fees/). USI Insurance Services; Licensed-producer authority, insurer-paid commission default, contingent compensation, and client request right. Accessed 2026-09-16.
9. [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.
10. [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.
11. [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.

### Professional Liability (E&O) Insurance Guide

12. [FAQ: Professional liability insurance](https://www.tdi.texas.gov/commercial/pl-faq.html). 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.
13. [Professional liability insurance](https://www.iii.org/article/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.
14. [Get business insurance](https://www.sba.gov/counseling/launch-your-business/#business-insurance). U.S. Small Business Administration; Six common types of business insurance table. Accessed 2026-09-16.
15. [Professional Liability – US Direct Errors and Omissions Insurance](https://www.hiscox.com/documents/pl-sample-policy-wording.pdf). 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.

Updated 2026-09-23. 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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