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, South Africa renew mobility agreement
Professional accounting bodies in the United States and South Africa signed a renewed mutual recognition agreement to support cross-border practice between the countries.
Author: By Kevin Brewer
Posted: April 23, 2026, 8:13 pm
AI and governance issues: 3 keys to bridging a costly gap
Recent survey results suggest that poor governance is more costly to artificial intelligence ROI than issues related to workforce and data readiness. What can companies do to get their house in order?
Author: By Bryan Strickland
Posted: April 23, 2026, 1:05 pm
AICPA comments on assurance standards for California climate law
In a comment letter to the California Air Resources Board, the AICPA and California Society of CPAs call for increased minimum assurance requirements related to greenhouse gas data that must be reported later this year.
Author: By Bryan Strickland
Posted: April 20, 2026, 7:14 pm