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 expands Tax Pro Account to allow payments on behalf of business clients
The IRS has expanded the Tax Pro Account to allow authorized tax professionals to make certain payments on behalf of business clients, building on a series of recent enhancements to the online service.
Author: By Martha Waggoner
Posted: November 6, 2026, 10:04 pm
U.S. employee engagement falls below 30% for first time in 15 years
U.S. employee engagement dropped below 30% for the first time in 15 years, and Gallup says manager support plays a larger role in workers' engagement than any other factor. The firm found that fewer employees reported opportunities to learn and grow at work, while manager engagement has also declined in recent years.
Author: By Martha Waggoner
Posted: November 6, 2026, 5:22 pm
IRS announces inflation adjustments for tax year 2027
The adjustments include increases in the standard deduction, income tax bracket thresholds, and the child tax credit. The changes generally apply to returns filed in 2028.
Author: By Martha Waggoner
Posted: November 5, 2026, 9:40 pm