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

AICPA reminds states of disaster-relief process with filing deadline near
The AICPA is reminding states about the correct procedure to use to request disaster tax relief following Hurricane Isaias' landfall just days before the Oct. 15 filing deadline.
Author: From staff reports
Posted: October 11, 2026, 10:42 pm
AICPA among organizations proposing Valuation Performance Framework
Feedback is being accepted through Dec. 22 on a principles-based framework to promote consistency, quality, and transparency in valuation engagements.
Author: By Bryan Strickland
Posted: October 8, 2026, 11:49 am
Recasting retirement: 3 ways AI is changing client-adviser conversations
What questions should financial advisers expect to hear from clients newly armed with artificial intelligence tools, and how can they answer the call to strengthen their position as essential experts?
Author: By Bryan Strickland
Posted: October 5, 2026, 5:55 pm