USI Insurance Services Professional Liability (E&O) Insurance
AICPA Professional Liability Program (USI Affinity)
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. 1,3Company-reported. AICPA program page and Business Services practice page.
Issuing Insurer
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. 1Company-reported. Direct quote from the AICPA program page; CNA underwrites only this named program, not USI's other professional-liability placements.
Who It’s For
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. 1Company-reported. Program page description.
Coverage Features
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. 1Company-reported. Program page description; actual insuring agreements, exclusions and conditions are set by the issued CNA policy form.
Limits and Retentions
Not publicly disclosed. 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. 1Page as read on 2026-09-23.
Risk Services
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. 1Company-reported. Program page description.
How to Apply
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. 1Company-reported. Contact instructions on the AICPA program page.
USI Insurance Services Professional Liability (E&O) Insurance Compared
Other USI Insurance Services Coverage Lines
Sources
- Accountants Professional Liability — USI Affinity. 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.
- USI Specialty Program Solutions. 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.
- Business Services. USI Insurance Services; USI advises clients...and provides solutions for...Errors & Omissions/Professional Liability... Accessed 2026-09-23.
