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

ENGAGE keynote: The thinking behind Costco’s hot dog special
Richard Galanti, CFO and the “voice of Costco” for nearly four decades, dishes on keys to the company’s success to kick off the 10th year of AICPA ENGAGE in Las Vegas.
Author: By Bryan Strickland
Posted: June 9, 2026, 12:34 pm
AICPA launches national campaign championing the CPA profession
CPA Trust aims to boost the profession’s profile via media promotions that highlight the unique brand of trust that CPAs offer.
Author: By Bryan Strickland
Posted: June 9, 2026, 11:00 am
5 state CPA societies merge
The CPA organizations of Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont have approved a merger to form the New England Society of CPAs.
Author: By Kevin Brewer
Posted: June 4, 2026, 7:13 pm