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

Facing cost pressures, CFOs turn to AI and automation
Cost management topped CFOs’ list of internal risks in a recent Deloitte survey, and respondents cited automation and technology upgrades as the most proven way to control costs.
Author: By Bryan Strickland
Posted: April 24, 2026, 7:26 pm
IRS to update Form 990 amid transparency push for nonprofits
A Treasury release said the changes are intended to “strengthen tax administration” and provide clearer reporting on the activities of tax-exempt organizations. No timeline was announced.
Author: By Martha Waggoner
Posted: April 24, 2026, 6:54 pm
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