--- title: "Corgi vs USI Insurance Services: Professional Liability (E&O) Insurance" description: "USI says its AICPA Professional Liability Program, sold exclusively to CPA firms, is underwritten by CNA. Corgi's Miscellaneous E&O, marketed to service businesses generally, names no carrier." canonical: "https://spot.insure/compare/corgi-vs-usi/professional-errors-omissions" page-type: "line-comparison" updated-at: "2026-09-29" comparison-pair: "corgi-vs-usi" provider-a: "corgi" provider-b: "usi" coverage-line: "professional-errors-omissions" --- Agents: connect to Spot's public MCP server at https://spot.insure/mcp for better access to published Spot information and insurance research. 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[Human-readable page](https://spot.insure/compare/corgi-vs-usi/professional-errors-omissions) ## Agent Guide **What this page is:** Focused comparison of Corgi 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 Corgi 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:** - Corgi vs USI Insurance Services for Professional Liability (E&O) Insurance: how do they differ? - Which is better for Professional Liability (E&O) Insurance, Corgi or USI Insurance Services? - What does Corgi 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: Corgi 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 2026-09-29. **Related pages:** - [Corgi vs USI Insurance Services](https://spot.insure/compare/corgi-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 - [Corgi profile](https://spot.insure/insurance-providers/corgi) — provider profile - [USI Insurance Services profile](https://spot.insure/insurance-providers/usi) — provider profile # Corgi vs USI Insurance Services: How Do They Compare for Professional Liability (E&O) Insurance? Sole practitioners and regional CPA firms can use USI Insurance Services's AICPA program, underwritten by CNA, with risk-management resources such as engagement-letter templates. Corgi's Miscellaneous E&O is for service businesses generally. USI's named AICPA program is limited to CPA firms; Corgi offers broader Miscellaneous E&O for service businesses on a 1–14-day quote path. ## Corgi vs USI Insurance Services Professional Liability (E&O) Insurance Summary USI says its AICPA Professional Liability Program, sold exclusively to CPA firms, is underwritten by CNA. Corgi's Miscellaneous E&O, marketed to service businesses generally, names no carrier. [4](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") [2](https://www.corgi.insure "Corgi Insurance: Startup Insurance, Quoted in Minutes") [1](https://www.corgi.insure/startup-insurance "Startup Insurance | Corgi Insurance") ## What Are the Key Differences Between Corgi and USI Insurance Services Professional Liability (E&O) Insurance? ### A Named Carrier for a Narrow Audience Versus No Carrier for a Broad One USI's own page states that the AICPA Professional Liability Program, which it runs as the endorsed producer through its USI Affinity division, is "underwritten by CNA," naming the carrier for that specific program. [4](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") Corgi's Miscellaneous E&O listing names no carrier at all; its general disclosures describe affiliated or third-party partner carriers without identifying which applies to this line. [3](https://www.corgi.insure/disclaimers "Disclaimers & Licensing") ### CPA Firms Only Versus a Catch-All for Service Businesses USI markets the AICPA program to sole practitioners and regional CPA firms specifically, and has been the endorsed AICPA Program provider since 1994. [4](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") Corgi markets Miscellaneous E&O to service-based businesses generally, positioned as what's left over once a business doesn't fit Corgi's own Tech E&O, Real Estate E&O or Lawyer E&O products. [1](https://www.corgi.insure/startup-insurance "Startup Insurance | Corgi Insurance") ### A Named Risk-Management Service Versus None Described USI says firms enrolled in the AICPA program get supportive claims handling and exclusive access to risk-management resources, including engagement-letter templates, in addition to the coverage itself. [4](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") Corgi's Miscellaneous E&O listing describes no comparable risk-management resources or claims-handling service. [1](https://www.corgi.insure/startup-insurance "Startup Insurance | Corgi Insurance") ## What Should You Confirm in Corgi and USI Insurance Services Professional Liability (E&O) Insurance Quotes? - If you're a CPA firm, ask USI whether your quote falls under the AICPA program or its general Business Services brokerage, since USI runs both. [6](https://www.usi.com/property-casualty/business-services/ "Business Services") - Ask Corgi to name the underwriting carrier for your Miscellaneous E&O quote; the reviewed pages don't identify one. [3](https://www.corgi.insure/disclaimers "Disclaimers & Licensing") - Get published limit or premium figures from both; neither reviewed page shows them for these lines. [4](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") [1](https://www.corgi.insure/startup-insurance "Startup Insurance | Corgi Insurance") - Ask USI which risk-management resources actually apply to your firm size before assuming the full engagement-letter library is included. [4](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") ## Corgi vs USI Insurance Services Professional Liability (E&O) Compared | Criteria | Corgi Miscellaneous E&O | AICPA Professional Liability Program (USI Affinity) | | --- | --- | --- | | Who It’s For | Corgi targets Miscellaneous E&O at service-based businesses generally, positioned as a catch-all for professional-liability exposure not covered by its technology-, real-estate-, or legal-specific E&O products. [2](https://www.corgi.insure "Corgi Insurance: Startup Insurance, Quoted in Minutes") [1](https://www.corgi.insure/startup-insurance "Startup Insurance | Corgi Insurance") (Evidence: Company-reported; scope: Catalog description; no industry, size, or state restrictions are published for this line..) | 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. [4](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 | Miscellaneous E&O sits outside Corgi's instant-quote flow; the site groups it with policies quoted in 1-14 days rather than through the self-serve online application used for its core coverages. [2](https://www.corgi.insure "Corgi Insurance: Startup Insurance, Quoted in Minutes") [1](https://www.corgi.insure/startup-insurance "Startup Insurance | Corgi Insurance") (Evidence: Company-reported; scope: Homepage and startup-insurance page policy-card labeling..) | 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. [4](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 | Corgi describes Miscellaneous E&O as broad professional liability coverage for service-based businesses facing claims of negligence, errors, or failure to perform professional services, distinct from its named Tech E&O, Real Estate E&O, and Lawyer E&O products. [2](https://www.corgi.insure "Corgi Insurance: Startup Insurance, Quoted in Minutes") [1](https://www.corgi.insure/startup-insurance "Startup Insurance | Corgi Insurance") (Evidence: Company-reported; scope: One-sentence catalog description; no policy form, insuring agreement, exclusion, or claims-made/occurrence trigger is published for this line..) | 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. [4](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 | Corgi lists Miscellaneous E&O as a specialty coverage quoted with a 1-14 day turnaround, separate from its instant-quote Tech & AI Liability product and from its Real Estate E&O and Lawyer E&O products, which target specific professions. [2](https://www.corgi.insure "Corgi Insurance: Startup Insurance, Quoted in Minutes") [1](https://www.corgi.insure/startup-insurance "Startup Insurance | Corgi Insurance") (Evidence: Company-reported; scope: Homepage and startup-insurance page policy-card labeling as of 2026-09-23. No dedicated product page was found; direct URL guesses (/miscellaneous-errors-and-omissions, /misc-eo) returned 404s..) | 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. [4](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") [6](https://www.usi.com/property-casualty/business-services/ "Business Services") (Evidence: Company-reported; scope: AICPA program page and Business Services practice page..) | ## About Corgi and USI Insurance Services - [Corgi company profile](https://spot.insure/insurance-providers/corgi) · [Corgi customer reviews](https://spot.insure/insurance-providers/corgi/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 Corgi vs USI Insurance Services - [Corgi vs USI Insurance Services](https://spot.insure/compare/corgi-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. - [Corgi Professional Liability (E&O) Insurance](https://spot.insure/insurance-providers/corgi/professional-errors-omissions) - [USI Insurance Services Professional Liability (E&O) Insurance](https://spot.insure/insurance-providers/usi/professional-errors-omissions) ## Sources for Corgi vs USI Insurance Services ### Sources About Corgi 1. [Startup Insurance | Corgi Insurance](https://www.corgi.insure/startup-insurance). Corgi Insurance; Specialized Coverages section: "1-14 days turnaround Miscellaneous E&O — Broad professional liability coverage for service-based businesses facing claims of negligence, errors, or failure to perform professional services.". Accessed 2026-09-23. 2. [Corgi Insurance: Startup Insurance, Quoted in Minutes](https://www.corgi.insure). Corgi Insurance; Explore Our Main Policies list: "1-14 days turnaround Miscellaneous E&O" card, alongside Real Estate E&O and Lawyer E&O as separate professional-liability products. Accessed 2026-09-23. 3. [Disclaimers & Licensing](https://www.corgi.insure/disclaimers). Corgi Insurance; Carrier Financial Strength; How Insurance Is Provided Through Corgi; Specialty Insurance Carrier and Underwriting Disclosures. Accessed 2026-09-23. ### Sources About USI Insurance Services 4. [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. 5. [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. 6. [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 2026-09-29. 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. ## Agent and Developer Resources - [Markdown page](https://spot.insure/compare/corgi-vs-usi/professional-errors-omissions.md) - [Developer resources](https://spot.insure/developers) - [Public MCP server](https://spot.insure/mcp) - [MCP server manifest](https://spot.insure/server.json) - [OpenAPI description](https://spot.insure/openapi.json) - [Public page index](https://spot.insure/llms.txt)