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

Are finance leaders moving too fast on agentic AI?
While more than 9 in 10 senior finance leaders in a recent survey said they’re under career pressure to demonstrate a return on agentic AI investment, the ROI may be slowed by an emphasis on speed above all.
Author: By Bryan Strickland
Posted: July 21, 2026, 6:22 pm
Why social media ‘failures’ can be big wins for small firms
The social media post that looks like a flop may actually result in a new client. Small firms should value authentic engagement over likes and follows, two ENGAGE presenters contend.
Author: By Bryan Strickland
Posted: July 20, 2026, 12:17 pm
SEC eyes e-delivery as the default over paper
The proposal would allow issuers, broker-dealers, investment advisers, and others to deliver information to investors electronically without first obtaining affirmative consent.
Author: By Bryan Strickland
Posted: July 16, 2026, 6:16 pm