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

FASB proposes update to residential mortgage servicing rights guidance
Feedback on the proposal, which addresses stakeholder concerns, is being accepted through Nov. 9.
Author: By Bryan Strickland
Posted: September 23, 2026, 7:11 pm
AICPA, former IRS commissioner to lead initiative on AI in tax
Participants in the Council on AI Risk in Tax, led by the AICPA and former IRS commissioner Danny Werfel, include leaders from all areas of the tax world who will work together to promote the responsible use of AI in tax administration and practice.
Author: By Martha Waggoner
Posted: September 23, 2026, 11:44 am
IRS cyber weaknesses put taxpayer data at risk again, TIGTA says
For the second consecutive year, a government watchdog found the IRS's cybersecurity program ineffective. TIGTA warned that taxpayer data could be vulnerable if security weaknesses are not addressed.
Author: By Martha Waggoner
Posted: September 21, 2026, 6:01 pm