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.


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.

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.


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.

Journal Of Accountancy News

Latest News from Journal Of Accountancy

This month’s column explains how the new AI tool known as ChatGPT can help with challenging Excel tasks such as creating PivotTables and writing macros.
Posted: January 30, 2023, 7:48 pm
Boardrooms that foster strong working relationships are good for business. The National Association of Corporate Directors offers some advice.
Posted: January 27, 2023, 8:34 pm
Although available to businesses of any size, the IRS expects the new Information Returns Intake System to be especially useful to small businesses that now file paper Forms 1099.
Posted: January 25, 2023, 10:18 pm