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.

Read more →

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.

Read more →

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.

Read more →

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.

Read more →

Tax, accounting, auditing news - Journal of Accountancy

Senate Finance Committee advances tax bill backed by AICPA
The Senate Finance Committee approved the Taxpayer Assistance and Service Act, legislation backed by the AICPA that would modernize IRS operations, expand taxpayer services, and give the IRS authority to deny, revoke, or suspend preparer tax identification numbers.
Author: By Martha Waggoner
Posted: July 30, 2026, 8:07 pm
A new top 5 firm: Grant Thornton acquiring fellow top 10 firm CBIZ
The deal, which includes an investment by private-equity company New Mountain Capital, will create a footprint featuring 34,000-plus employees in more than 20 countries and territories.
Author: By Bryan Strickland
Posted: July 29, 2026, 6:33 pm
FinCEN director expects final BOI reporting rule soon
The director of the Financial Crimes Enforcement Network told a congressional subcommittee that she’s “very optimistic” that the final rule will be issued before the end of the year.
Author: By Martha Waggoner
Posted: July 29, 2026, 6:23 pm