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

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
PCAOB seeks comment on standard-setting and research
The PCAOB seeks public comment on future areas of focus for standard setting, building on the dialogue initiated earlier this year.
Author: By Kevin Brewer
Posted: June 25, 2026, 8:12 pm