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

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
IRS raises standard mileage rates for remainder of 2026
The midyear change follows an increase in gasoline prices, according to the IRS. It is the first such midyear adjustment since 2022.
Author: By Martha Waggoner
Posted: July 15, 2026, 6:26 pm