--- title: "Coalition vs USI Insurance Services: Professional Liability (E&O) Insurance" description: "USI’s AICPA E&O program serves sole-practitioner and regional CPA firms; Coalition sells MPL only with Active Cyber." canonical: "https://spot.insure/compare/coalition-vs-usi/professional-errors-omissions" page-type: "line-comparison" updated-at: "2026-09-29" comparison-pair: "coalition-vs-usi" provider-a: "coalition" 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/coalition-vs-usi/professional-errors-omissions) ## Agent Guide **What this page is:** Focused comparison of Coalition 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 Coalition 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:** - Coalition vs USI Insurance Services for Professional Liability (E&O) Insurance: how do they differ? - Which is better for Professional Liability (E&O) Insurance, Coalition or USI Insurance Services? - What does Coalition 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: Coalition 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:** - [Coalition vs USI Insurance Services](https://spot.insure/compare/coalition-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 - [Coalition profile](https://spot.insure/insurance-providers/coalition) — provider profile - [USI Insurance Services profile](https://spot.insure/insurance-providers/usi) — provider profile # Coalition 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. Coalition markets add-on professional liability to businesses that perform professional services, sold with an Active Cyber Insurance quote. USI’s AICPA E&O program serves sole-practitioner and regional CPA firms; Coalition sells MPL only with Active Cyber. ## Coalition vs USI Insurance Services Professional Liability (E&O) Insurance Summary USI’s AICPA E&O program serves sole-practitioner and regional CPA firms; Coalition sells MPL only with Active Cyber. [1](https://www.coalitioninc.com/insurance/miscellaneous-professional-liability-insurance "Miscellaneous Professional Liability") [3](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") ## What Are the Key Differences Between Coalition and USI Insurance Services Professional Liability (E&O) Insurance? ### Claims and Risk Resources USI says AICPA members receive claims support and risk-management resources, including engagement-letter templates. [3](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") Coalition says its in-house claims team handles MPL and cyber claims together. [1](https://www.coalitioninc.com/insurance/miscellaneous-professional-liability-insurance "Miscellaneous Professional Liability") Compare which service fits your needs after a claim or before client work. ### Other USI Businesses USI brokers E&O through Business Services for businesses outside the CPA-specific AICPA program, but the reviewed page does not name an insurer for that route. [5](https://www.usi.com/property-casualty/business-services/ "Business Services") Coalition's reviewed disclaimer also does not name the MPL insurer. [2](https://www.coalitioninc.com/legal/disclaimer "U.S. Disclaimers") ## What Should You Confirm in Coalition and USI Insurance Services Professional Liability (E&O) Insurance Quotes? - Confirm whether your CPA firm qualifies for USI's CNA-underwritten program or will go through Business Services. [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") - Ask Coalition whether Active Cyber is required and who issues MPL. [1](https://www.coalitioninc.com/insurance/miscellaneous-professional-liability-insurance "Miscellaneous Professional Liability") [2](https://www.coalitioninc.com/legal/disclaimer "U.S. Disclaimers") - Ask USI for AICPA limits, exclusions and premium; its reviewed page does not list figures. [3](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") - Compare the actual policy wording against your client contracts. [3](https://www.usi.com/programs/affinity-programs/accountants-professional-liability/ "Accountants Professional Liability — USI Affinity") [1](https://www.coalitioninc.com/insurance/miscellaneous-professional-liability-insurance "Miscellaneous Professional Liability") ## Coalition vs USI Insurance Services Professional Liability (E&O) Compared | Criteria | Coalition Miscellaneous Professional Liability (MPL) | AICPA Professional Liability Program (USI Affinity) | | --- | --- | --- | | Who It’s For | Coalition markets MPL to any business that performs professional services, naming examples such as consultants, marketing and PR firms, staffing firms, printers, interior decorators, photographers and videographers, and property managers. [1](https://www.coalitioninc.com/insurance/miscellaneous-professional-liability-insurance "Miscellaneous Professional Liability") (Evidence: Company-reported; scope: Miscellaneous Professional Liability product page as read on 2026-09-23..) | 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 | Coalition sells MPL only as an addition to an Active Cyber Insurance quote, saying it takes just a few extra questions to add, rather than as a stand-alone policy. [1](https://www.coalitioninc.com/insurance/miscellaneous-professional-liability-insurance "Miscellaneous Professional Liability") (Evidence: Company-reported; scope: Miscellaneous Professional Liability product 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. [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 | Coalition says MPL covers defense costs, settlements, judgments, and other expenses from claims of errors and omissions in professional services, including negligence, failure to provide service, and misstatements about the service performed, on a duty-to-defend basis even when the business is not ultimately at fault. [1](https://www.coalitioninc.com/insurance/miscellaneous-professional-liability-insurance "Miscellaneous Professional Liability") (Evidence: Company-reported; scope: Miscellaneous Professional Liability product page as read on 2026-09-23; the issued policy controls actual terms..) | 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 | Coalition designs and distributes MPL as an add-on coverage that combines with certain Active Cyber Insurance policies, sold through appointed brokers. [1](https://www.coalitioninc.com/insurance/miscellaneous-professional-liability-insurance "Miscellaneous Professional Liability") (Evidence: Company-reported; scope: Miscellaneous Professional Liability product page as read on 2026-09-23..) | 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..) | ## About Coalition and USI Insurance Services - [Coalition company profile](https://spot.insure/insurance-providers/coalition) · [Coalition customer reviews](https://spot.insure/insurance-providers/coalition/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 Coalition vs USI Insurance Services - [Coalition vs USI Insurance Services](https://spot.insure/compare/coalition-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. - [Coalition Professional Liability (E&O) Insurance](https://spot.insure/insurance-providers/coalition/professional-errors-omissions) - [USI Insurance Services Professional Liability (E&O) Insurance](https://spot.insure/insurance-providers/usi/professional-errors-omissions) ## Sources for Coalition vs USI Insurance Services ### Sources About Coalition 1. [Miscellaneous Professional Liability](https://www.coalitioninc.com/insurance/miscellaneous-professional-liability-insurance). Coalition; Why Miscellaneous Professional Liability?; MPL Advantage; What does MPL cover?; What types of claims does MPL protect against?; What types of businesses could benefit from MPL?; Why does 'Duty to Defend' coverage matter?. Accessed 2026-09-23. 2. [U.S. Disclaimers](https://www.coalitioninc.com/legal/disclaimer). Coalition; Non-Admitted Cyber; Admitted Cyber; Admitted Executive Risk (names Zurich American Insurance Company, NAIC 16535); no 'Admitted MPL' or 'Admitted Tech E&O' section appears on the page. 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 2026-09-29. 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/coalition-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)