Barton D. Haag



Barton Haag joined ARB in 1996 and has been a principal with the firm since 2005. His career focus is primarily in providing financial accounting, income tax planning, and business advisory services for clients in the automotive and motorcycle dealership industries and for closely held businesses, many of which are family owned.

Education and Designations

  • Bachelor of Science in Business Finance with a focus in Accounting, University of Montana
  • Certified Public Accountant (CPA), Licensed in the States of Maine and Massachusetts


Bart is celebrating over 25 years with the firm.

Community Involvement

  • Past Chairman, AutoCPA Group
  • Board of Directors and Past President, hear ME now!
  • Treasurer and Board of Directors, Princes Point Improvement Association
  • Board of Directors, SailMaine


As the Practice Leader of ARB’s Auto Dealership Group, Bart routinely assists auto dealerships in navigating manufacturer compliance issues, owner transitions, acquisitions and dispositions, among other industry specific challenges. Bart works with dealerships to identify opportunities to improve systems and profitability using the ARB Dashboard, a custom-designed financial benchmarking tool. Using the Dashboard, Bart and the ARB Team are able to help dealership clients gain a clearer picture of their operational statistics, their profitability, and areas of opportunity.
In working with closely held businesses, Bart has developed a true understanding of the intricacies of navigating accounting and tax services for businesses with family dynamics. His expertise allows him to provide services of the highest degree that are beneficial for businesses and their shareholders, partners, members, and related ventures, trusts, and estates, alike.
Bart works extensively with corporations, partnerships, and LLCs on tax compliance and planning matters. He provides financial projections, cash flow and profitability analyses, due diligence and M&A services, along with process improvement, strategic planning, and many other services to ARB’s business clients.

Professional Associations