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

IRS should open Trump accounts for eligible children automatically, AICPA says
In a letter to the IRS and Treasury, the AICPA said enrolling children by default “would promote equitable access, reduce procedural barriers, and strengthen the intended reach of the program.”
Author: By Martha Waggoner
Posted: February 27, 2026, 3:06 pm
AI early adopters pull ahead but face rising risk, global report finds
Most companies committed to AI tools believe they have a strategic advantage, but they also have more risks to consider.
Author: By Bryan Strickland
Posted: February 26, 2026, 9:36 pm
COSO creates audit-ready guidance for governing generative AI
The Committee of Sponsoring Organizations of the Treadway Commission’s publication relies on its proven internal control framework to help companies manage AI-related risks.
Author: By Bryan Strickland
Posted: February 26, 2026, 8:55 pm