Westford: 978-692-3291 | Marlborough: 508-485-4290

About Turner & Costa, P.C.

Turner & Costa, P.C. is a well-established Northern Massachusetts CPA firm located in Westford and Marlborough with expertise in all facets of financial management, including taxes, accounting, bookkeeping, QuickBooks, business consulting, and much more. We serve a wide range of both business and individual clients throughout Northern Massachusetts and Central Massachusetts including Marlborough, Lowell, Westford, Acton, Chelmsford, Hudson, Groton and Ayer and surrounding communities. Turner & Costa, P.C. is known for our strong commitment to integrity and our policy of tailoring our services to the individual needs of each client.

We offer a free initial consultation. There's no obligation, so give us a call at 978-692-3291 and let's discuss how we can help you meet your financial goals.


Bob Turner

Bob Turner is the President and Managing Partner of Turner & Costa, P.C.. A graduate of Northeastern University, Bob received his Bachelor of Science degree in Accounting. For the past twenty-five years Bob has provided individual financial, tax, estate investment and small business consultation to a diverse client base.

Bob is a member of the American Institute of Certified Public Accountants and the Massachusetts Society of Certified Public Accountants. Bob is a past President of the Marlborough Rotary Club, and has served for the past ten years as Assistant Treasurer of the Club. He has served on various community-related boards and fundraising committees, volunteered in the Marlborough School System where his sons are attending school, as well as coaching Marlborough Youth Soccer for several years.

Bob resides in Marlborough with his wife and two sons.

Greg Costa

Greg Costa is a Certified Public Accountant (CPA) that has worked for Turner & Costa, PC. (formerly Robert Turner, P.C.) since graduating from college and has been vital to the growth and development of the company. Greg received his B.S. from St. Anselm's College in 2002 as an accounting major. In 2009, Greg earned his Certified Public Accounting license and has a vast range of experience in all aspects of individual and corporate accounting matters, and works closely with a diverse client base.  He resides in Northborough, MA with his wife and two daughters.