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

Trump account prop. regs. clarify $2,500 limit for workers
The proposed regulations, which the IRS said would affect millions of children, families, and employers, also address self-employed owners, Sec. 125 cafeteria-plan contributions, and employer matching of the government’s $1,000 pilot-program contribution.
Author: By Martha Waggoner
Posted: August 11, 2026, 6:40 pm
Final regs. issued for Sec. 3406 backup withholding rules
Final IRS regulations reflect changes made by the OBBBA to rules governing backup withholding on third-party network transactions under Sec. 3406.
Author: By Martha Waggoner
Posted: August 10, 2026, 8:22 pm
4 Social Security rules that surprise clients — and some advisers
A divorced spouse may qualify for benefits based on their ex’s work record. A surviving spouse may qualify before age 62. And some families may be eligible for benefits related to their children.
Author: By Bryan Strickland
Posted: August 10, 2026, 7:59 pm