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

Center for Audit Quality tabs Dave Sullivan as CEO
Sullivan currently serves as chair of the Financial Accounting Standards Advisory Council and served as an audit leader during a long career with Deloitte.
Author: By Bryan Strickland
Posted: October 30, 2026, 5:12 pm
FASB proposes changes to the accounting for equity-method investments
Stakeholders have until Jan. 11 to provide feedback on a proposed Accounting Standard Update aimed at improving operability and reducing complexity and cost.
Author: By Bryan Strickland
Posted: October 30, 2026, 12:10 pm
AI changes how accountants work, not what they do
Three years after tax professionals attended the AICPA National Tax Conference’s first session on generative AI, a speaker from the 2023 conference and a speaker at this year's conference say the technology is changing how accountants work, not replacing them. They also say AI’s growing role in practice requires safeguards, oversight, and experienced professionals.
Author: By Martha Waggoner
Posted: October 29, 2026, 8:28 pm