About

John W. Halloran CPA, P.C. helps established privately held businesses across Long Island and the New York metropolitan area maintain reliable financial reporting, plan for taxes throughout the year and make informed business decisions.

Our ongoing accounting and business tax services bring together monthly close, management reporting, tax planning and compliance. Controller support and CFO advisory provide additional oversight, cash flow forecasting and financial analysis as needed. We work alongside each client’s existing team and advisers, with clear responsibilities and services tailored to the business.

We also help companies prepare for lender requirements, external audits performed by a separate CPA firm and future business sales. Focused services include audit readiness, seller-side transaction advisory, internal controls consulting and internal audit support.

Based in Commack, we serve construction, manufacturing and distribution, real estate, medical and dental practices, professional services and technology businesses. Our Private Client Services practice provides year-round tax planning and coordination for high-net-worth individuals and families.

John W. Halloran, CPA, founded the firm in 2005 and leads its accounting and tax practice as Managing Partner. John W. Halloran, Jr., CFA, Managing Director, leads the firm’s CFO Advisory practice.