--- title: "Coterie Insurance 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. Coterie's MPL covers dozens of professions under one form but names only the policy form, not an insurer." canonical: "https://spot.insure/compare/coterie-vs-usi/professional-errors-omissions" page-type: "line-comparison" updated-at: "2026-09-25" comparison-pair: "coterie-vs-usi" provider-a: "coterie" 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/coterie-vs-usi/professional-errors-omissions) ## Agent Guide **What this page is:** Focused comparison of Coterie Insurance 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 Coterie Insurance 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:** - Coterie Insurance vs USI Insurance Services for Professional Liability (E&O) Insurance: how do they differ? - Which is better for Professional Liability (E&O) Insurance, Coterie Insurance or USI Insurance Services? - What does Coterie Insurance 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: Coterie Insurance 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:** - [Coterie Insurance vs USI Insurance Services](https://spot.insure/compare/coterie-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 - [Coterie Insurance profile](https://spot.insure/insurance-providers/coterie) — provider profile - [USI Insurance Services profile](https://spot.insure/insurance-providers/usi) — provider profile # Coterie Insurance vs USI Insurance Services: How Do They Compare for Professional Liability (E&O) Insurance? USI Insurance Services markets its AICPA program, underwritten by CNA, to sole practitioners and regional CPA firms, with engagement-letter templates and risk resources. Coterie Insurance lists dozens of eligible professions and sells only through agents and brokers. USI's AICPA program is limited to CPA firms; Coterie uses one MPL form with published limits across dozens of listed professions. ## Coterie Insurance 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. Coterie's MPL covers dozens of professions under one form but names only the policy form, not an insurer. [3](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") [1](https://8588529.fs1.hubspotusercontent-na1.net/hubfs/8588529/Current%20Appetite%20Content/Professional%20Liability%20Brochure_December2025.pdf "Miscellaneous Professional Liability (MPL) Policy Overview & Product Highlights for Agents and Brokers") ## What Are the Key Differences Between Coterie Insurance and USI Insurance Services Professional Liability (E&O) Insurance? ### A Named Carrier for a Narrow Program 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." [3](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") Coterie's MPL brochure names the policy form, "Coterie Professional Liability Errors and Omissions Insurance Declarations," but leaves the issuing insurer to the policy declarations. [1](https://8588529.fs1.hubspotusercontent-na1.net/hubfs/8588529/Current%20Appetite%20Content/Professional%20Liability%20Brochure_December2025.pdf "Miscellaneous Professional Liability (MPL) Policy Overview & Product Highlights for Agents and Brokers") ### CPA Firms Only Versus Dozens of Listed Professions USI markets the AICPA program to sole practitioners and regional CPA firms specifically, and has been the endorsed AICPA Program provider since 1994. [3](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") Coterie lists dozens of eligible professions for MPL instead, including accounting services, architects and engineers, bookkeeping, human resources consulting, interior design and technology services/IT consulting. [1](https://8588529.fs1.hubspotusercontent-na1.net/hubfs/8588529/Current%20Appetite%20Content/Professional%20Liability%20Brochure_December2025.pdf "Miscellaneous Professional Liability (MPL) Policy Overview & Product Highlights for Agents and Brokers") ### A Named Risk-Management Service Versus a Published Exclusions List USI says firms enrolled in the AICPA program get supportive claims handling and exclusive access to risk-management resources, including engagement-letter templates. [3](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") Coterie's MPL brochure instead publishes its base-form exclusions directly, covering bodily injury or property damage, fraud, wrongful termination and contractual liability beyond the underlying contract. [1](https://8588529.fs1.hubspotusercontent-na1.net/hubfs/8588529/Current%20Appetite%20Content/Professional%20Liability%20Brochure_December2025.pdf "Miscellaneous Professional Liability (MPL) Policy Overview & Product Highlights for Agents and Brokers") ## What Should You Confirm in Coterie Insurance 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. [5](https://www.usi.com/property-casualty/business-services/ "Business Services") - Ask an agent or broker to name the insurer behind your Coterie MPL declarations page, since the brochure doesn't name one. [1](https://8588529.fs1.hubspotusercontent-na1.net/hubfs/8588529/Current%20Appetite%20Content/Professional%20Liability%20Brochure_December2025.pdf "Miscellaneous Professional Liability (MPL) Policy Overview & Product Highlights for Agents and Brokers") - Get published limit or premium figures from USI directly, since the AICPA program page doesn't publish them. [3](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") - Ask an agent or broker which of Coterie's each-claim limit tiers your contract requires before binding. [1](https://8588529.fs1.hubspotusercontent-na1.net/hubfs/8588529/Current%20Appetite%20Content/Professional%20Liability%20Brochure_December2025.pdf "Miscellaneous Professional Liability (MPL) Policy Overview & Product Highlights for Agents and Brokers") ## Coterie Insurance vs USI Insurance Services Professional Liability (E&O) Compared | Criteria | Coterie Miscellaneous Professional Liability (MPL) | AICPA Professional Liability Program (USI Affinity) | | --- | --- | --- | | Who It’s For | Coterie lists dozens of eligible professions for MPL, including accounting services, architects and engineers, bookkeeping, human resources consulting, interior design, property management, real estate agents/brokers, and technology services/IT consulting, each with profession-specific exclusions in some cases (for example, barbers/beauticians exclude services like electrolysis and tattoo services). [1](https://8588529.fs1.hubspotusercontent-na1.net/hubfs/8588529/Current%20Appetite%20Content/Professional%20Liability%20Brochure_December2025.pdf "Miscellaneous Professional Liability (MPL) Policy Overview & Product Highlights for Agents and Brokers") (Evidence: Company-reported; scope: MPL brochure 'Eligible Professions' and 'Eligible Professions (Continued)' lists..)

Coterie says MPL is available in most states but is currently unavailable in DC, IL, MA, MT, ND, and VA. [1](https://8588529.fs1.hubspotusercontent-na1.net/hubfs/8588529/Current%20Appetite%20Content/Professional%20Liability%20Brochure_December2025.pdf "Miscellaneous Professional Liability (MPL) Policy Overview & Product Highlights for Agents and Brokers") (Evidence: Company-reported; scope: MPL brochure 'MPL unavailable' note..) | 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. [3](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 | MPL is distributed only through agents and brokers using Coterie's quoting platform; the reviewed brochure does not describe a direct-to-business application path. [1](https://8588529.fs1.hubspotusercontent-na1.net/hubfs/8588529/Current%20Appetite%20Content/Professional%20Liability%20Brochure_December2025.pdf "Miscellaneous Professional Liability (MPL) Policy Overview & Product Highlights for Agents and Brokers") (Evidence: Company-reported; scope: MPL brochure framing as 'for Agents and Brokers'..) | 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. [3](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 | Coterie's MPL policy covers economic or financial (non-physical) damages arising from wrongful acts in professional services, such as faulty reports or verbal advice that cause a client financial loss; it is written on a claims-made basis covering incidents reported during the policy period or an extended reporting period, occurring after the policy's retroactive date. [1](https://8588529.fs1.hubspotusercontent-na1.net/hubfs/8588529/Current%20Appetite%20Content/Professional%20Liability%20Brochure_December2025.pdf "Miscellaneous Professional Liability (MPL) Policy Overview & Product Highlights for Agents and Brokers") (Evidence: Company-reported; scope: MPL brochure policy overview and 'Professional Liability Limits of Insurance' definitions..)

Coterie's MPL base form excludes bodily injury or property damage claims, fraud or intentional wrongful acts, wrongful termination or discrimination claims, and claims based on contractual liability assumed beyond what would exist without the contract, among other listed exclusions. [1](https://8588529.fs1.hubspotusercontent-na1.net/hubfs/8588529/Current%20Appetite%20Content/Professional%20Liability%20Brochure_December2025.pdf "Miscellaneous Professional Liability (MPL) Policy Overview & Product Highlights for Agents and Brokers") (Evidence: Company-reported; scope: MPL brochure 'Professional Liability Policy Base Form Exclusions' list..) | 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. [3](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 | Coterie writes Miscellaneous Professional Liability (MPL) as a claims-made policy sold through agents and brokers to protect a small-business client against third-party claims for errors or omissions in their professional services. [1](https://8588529.fs1.hubspotusercontent-na1.net/hubfs/8588529/Current%20Appetite%20Content/Professional%20Liability%20Brochure_December2025.pdf "Miscellaneous Professional Liability (MPL) Policy Overview & Product Highlights for Agents and Brokers") (Evidence: Company-reported; scope: MPL brochure policy-overview paragraph..) | 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. [3](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") [5](https://www.usi.com/property-casualty/business-services/ "Business Services") (Evidence: Company-reported; scope: AICPA program page and Business Services practice page..) | | Issuing Insurer | The MPL brochure names the policy form 'Coterie Professional Liability Errors and Omissions Insurance Declarations' (form code CTPL CWW PL) but does not name the issuing insurer; that appears only on the policy declarations. [1](https://8588529.fs1.hubspotusercontent-na1.net/hubfs/8588529/Current%20Appetite%20Content/Professional%20Liability%20Brochure_December2025.pdf "Miscellaneous Professional Liability (MPL) Policy Overview & Product Highlights for Agents and Brokers") (Evidence: Company-reported; scope: MPL brochure 'Mandatory Countrywide PL Policy Forms' table..) | 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. [3](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..) | ## About Coterie Insurance and USI Insurance Services - [Coterie Insurance company profile](https://spot.insure/insurance-providers/coterie) · [Coterie Insurance customer reviews](https://spot.insure/insurance-providers/coterie/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 Coterie Insurance vs USI Insurance Services - [Coterie Insurance vs USI Insurance Services](https://spot.insure/compare/coterie-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. - [Coterie Insurance Professional Liability (E&O) Insurance](https://spot.insure/insurance-providers/coterie/professional-errors-omissions) - [USI Insurance Services Professional Liability (E&O) Insurance](https://spot.insure/insurance-providers/usi/professional-errors-omissions) ## Sources for Coterie Insurance vs USI Insurance Services ### Sources About Coterie Insurance 1. [Miscellaneous Professional Liability (MPL) Policy Overview & Product Highlights for Agents and Brokers](https://8588529.fs1.hubspotusercontent-na1.net/hubfs/8588529/Current%20Appetite%20Content/Professional%20Liability%20Brochure_December2025.pdf). Coterie Insurance; Policy overview paragraph; Eligible Professions list; 'Currently unavailable in: DC, IL, MA, MT, ND, and VA'; Professional Liability Limits of Insurance table; Claims-Made Policy Form / Retroactive Date / Extended Reporting Period definitions; Mandatory Countrywide PL Policy Forms; Base Form Exclusions. Accessed 2026-09-23. 2. [Coterie Insurance small business products overview](https://coterieinsurance.com/insurance/). Coterie Insurance; Product line overview page listing Professional Liability among Coterie's coverages. Accessed 2026-09-23. ### Sources About USI Insurance Services 3. [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. 4. [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. 5. [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. ## Agent and Developer Resources - [Markdown page](https://spot.insure/compare/coterie-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)