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

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.

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.

Tax, accounting, auditing news - Journal of Accountancy

More than 30% of corporate employees in a new survey said AI has increased their workload, nearly double the percentage of employees reporting a workload decrease.
Author: By Bryan Strickland
Posted: February 20, 2026, 6:50 pm
Financial analyst Caitlin Domina was one of three joint first honorees globally in the latest testing window for the CGMA Management Case Study Exam.
Author: By Bryan Strickland
Posted: February 19, 2026, 9:38 pm
The average individual tax refund is up nearly 11% in the first 10 business days of the 2026 filing season, rising to $2,290 from $2,065 last year.
Author: By Martha Waggoner
Posted: February 19, 2026, 1:03 pm