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

US, Canada, Mexico extend CPA mobility agreement through 2028
The AICPA and the National Association of State Boards of Accountancy are among the group of entities reaffirming a smooth path for accounting professionals to practice across North American borders.
Author: By Bryan Strickland
Posted: March 10, 2026, 6:41 pm
Top 50 firm announces new majority private-equity investment
Schellman’s investment from Goldman Sachs, a transaction expected to close in the second quarter of this year, comes after its initial private-equity deal with Lightyear Capital in 2021.
Author: By Bryan Strickland
Posted: March 9, 2026, 6:47 pm
IRS proposes regulations for Trump accounts, pilot program
Proposed regulations under Sec. 530A provide information on how to open initial Trump accounts, and proposed regulations under Sec. 6434 provide guidance on the program that provides $1,000 contributions to Trump accounts for eligible children.
Author: By Martha Waggoner
Posted: March 9, 2026, 4:27 pm