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

7 CPAs honored at ENGAGE 2026
The AICPA honored seven CPAs at ENGAGE in Las Vegas, highlighting CPA efforts in a specific accounting specialty area, excellence in volunteer efforts, and significant contributions to the profession.
Author: By Kevin Brewer
Posted: June 10, 2026, 4:16 pm
IRS to merge tax practitioner offices despite AICPA opposition
The new Tax Professional Management Office will combine the Return Preparer Office and Office of Professional Responsibility functions under one structure, with the IRS saying their missions and oversight roles would remain unchanged.
Author: By Martha Waggoner
Posted: June 10, 2026, 11:39 am
ENGAGE takeaways: 7 principles to improve CPA firm profitability
For the 10th consecutive conference, former AICPA chair Bill Pirolli shared tried-and-true keys for next-level financial success for firms.
Author: By Bryan Strickland
Posted: June 9, 2026, 11:07 pm