Hallisey & D’Agostino, LLP is a full-service public accounting firm offering a wide array of accounting, tax, and advisory services to individuals and small to mid-size closely-held businesses located throughout Connecticut and the surrounding areas.

Accounting & Assurance

Whether it’s assisting with routine bookkeeping issues or advising on a complex transaction during an audit, we have the skills and resources necessary to help you produce accurate, high-quality and timely financial information.

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Tax

Tax laws and regulations are in a constant state of flux and we recognize that in addition to experience, staying up-to-date on current developments is critical in creating a comprehensive tax strategy.

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Business Advisory

From start-ups to established enterprises, businesses at every phase need sound advice to navigate operational challenges, succession planning, and an ever-changing regulatory landscape.

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Individuals

Achieving your financial goals and ultimately a secure retirement requires discipline and the right mix of personalized wealth accumulation and preservation strategies, including tax minimization and trust & estate planning.

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Tax, accounting, auditing news - Journal of Accountancy

Ellison-Taylor, Dodaro receive AICPA’s highest honors
A pioneering former AICPA chair and the former head of the U.S. Government Accountability Office were honored as Gold Medal award recipients at Council.
Author: From staff reports
Posted: October 21, 2026, 4:50 pm
Problem solved: A math example of CPA-led assurance using AI agents
A CPA who recently solved a 40-year-old math problem using AI believes that the “gold rush” to solve similar problems is creating a golden opportunity for CPAs in the assurance space.
Author: By Bryan Strickland
Posted: October 19, 2026, 5:14 pm
AICPA partners on new offering that assures AI systems and agents
The first-of-its-kind assurance certification, developed with the Artificial Intelligence Underwriting Company, is in a piloting phase and is expected to fully launch in early 2027.
Author: By Bryan Strickland
Posted: October 19, 2026, 12:03 pm