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 offers gift tax safe harbor for contributions to Trump accounts
The guidance sets forth conditions for contributions to qualify for the annual gift tax exclusion and for donors to avoid filing gift tax returns.
Author: By Martha Waggoner
Posted: June 29, 2026, 8:17 pm
Standardization of sustainability reporting improves, but obstacles remain
While an increasing number of large U.S. companies turned to audit firms for assurance of sustainability data in 2024, a gap persists with the rest of the world, an annual report shows.
Author: By Bryan Strickland
Posted: June 29, 2026, 1:14 pm
IRS outlines AI risks, Circular 230 duties for tax practitioners
The IRS warned that AI’s risks — including fabricated outputs and data privacy concerns — require practitioners to verify results and follow existing Circular 230 rules on diligence, competence, and confidentiality.
Author: By Martha Waggoner
Posted: June 26, 2026, 12:58 pm