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

The IRS said scams involving the fuel tax credit, the sick and family leave credit, and household employment taxes led thousands of taxpayers to file inflated refund claims.
Posted: May 17, 2024, 4:16 pm
Changes to Regulation S-P call for covered institutions to develop an incident-response plan beginning in 2026.
Posted: May 16, 2024, 6:34 pm
The statement offers new definitions of “other practitioner” and completes the suite of standards that firms performing A&A services are required to use to design and implement a QM system by Dec. 15, 2025, and to perform A&A services in accordance with for engagements beginning on or after that date.
Posted: May 15, 2024, 2:01 pm