Grassi & Co. CPAs

Grassi & Co. CPAs, P.C. has been recognized as one of the nation's elite accounting firms. Ranked by Crain's New York Business as one of the 25 largest accounting firms in New York and by Long Island Business News as one of the top 10 on Long Island (#8), we are a full-service tax, accounting and business advisory firm. We have headquarters in Lake Success, New York, and offices in Manhattan and North Carolina.

Respected throughout the industry, our team consists of nearly 100 talented professionals, each with a diverse range of functional and industry experience. For more than a quarter century, we have helped clients improve their businesses and realize their potential. Our people are the key to our success, and we have been recognized as one of the Best Places to Work on Long Island. However, no awards or accolades can surpass the value or importance of our clients' testimonials. The firm's motto, embodied by managing partner Lou Grassi, best sums up our philosophy: "We Work Hard and We Play Hard."