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Costello Company, LLC believes in providing continuing service to our clients' not just year-end audit and accounting services. We believe that a CPA firm should assist, train and advise management, accounting and information personnel.

We believe in going "beyond the books and records" to gain a complete understanding of client operations and objectives. In short, we believe that we have a professional responsibility to utilize our expertise to help clients achieve all their financial, management and economic goals. That is the professional philosophy we have embraced throughout the firm.

Toward that end, Costello Company has adopted a mission statement that identifies our objectives for quality and service, while requiring each member of our service teams to fully utilize their talents and creativity to satisfy the accounting, auditing, tax and financial consulting needs of every Costello Company client.

Service Excellence Program

Costello Company's Service Excellence Program identifies and rewards firm personnel who demonstrate service to our clients "above and beyond what is expected." The program is designed to encourage each member of our staff to evaluate their performance on an ongoing basis by asking: "How did I do? How can I do it better next time?"

The Service Excellence Program creates an environment that stresses continuous improvement in the services we provide. Though our program generously compensates our employees for superior service, Costello Company's clients are the major beneficiaries of their efforts.

Mission Statement

Costello Company, LLC is dedicated to excellence in audit, accounting, tax and business counseling services. We are committed to the highest standards of quality, integrity and timely, responsive service. We pledge to use all of our talents and creativity in a process of continuous improvement so that our clients can achieve their financial, management and economic goals.


 15 Wall Street, Hebron, CT 06248     Home