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

6 top scorers on CPA Exam earn Elijah Watt Sells Award
Of more than 87,000 CPA candidates who sat for the CPA Exam in 2025, a half dozen passed all four sections on their first attempt while recording a cumulative average score above 95.5.
Author: By Bryan Strickland
Posted: June 2, 2026, 6:40 pm
IRS proposes increase in cost of estate tax closing letter
Proposed regulations issued Monday would raise the cost of the letter to $76, from the $56 set in 2025.
Author: By Martha Waggoner
Posted: June 2, 2026, 2:20 pm
Most retirees worry about savings — but few use financial advisers
Less than one-third of retired Americans in a recent survey reported working with a financial adviser, even though nearly 7 in 10 are concerned about managing their income throughout retirement.
Author: By Bryan Strickland
Posted: June 1, 2026, 8:06 pm