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

IRS finalizes increase in estate tax closing letter fee
The IRS issued final regulations increasing the cost of an estate tax closing letter to $76 from $56, adopting without change proposed regulations issued in June.
Author: By Martha Waggoner
Posted: September 24, 2026, 6:50 pm
IRS raises per diem rates for business travel effective Oct. 1
In its annual update, the IRS increased the special per diem rates taxpayers may use to substantiate business travel expenses for the upcoming travel year and updated its list of high-cost localities.
Author: By Martha Waggoner
Posted: September 24, 2026, 6:37 pm
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