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About Abacus

Abacus CPA, LLC was created with the business owner and individual in mind. Abacus strives to help solve its customers problems and help alleviate the stress of financial and business growth.

Abacus provides the business owner and individual the tools, strategies and industry knowledge necessary to achieve their specific objectives and goals.

This allows the individual and business to plan and prepare for their financial futures, effectively. Financial planning and tax planning strategies are key components to long-term financial success. Let Abacus partner with you to help ease the burden and take the fear out of finance.

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Irene Borum

Irene is the founding member of Abacus CPA, LLC. Abacus is headquartered in Atlanta, Georgia with satellite offices in Boston, MA and Detroit, MI.

Irene is a Certified Public Accountant. She is a graduate of University of Massachusetts and she holds an MBA in Finance, a Master’s in Accounting and a dual bachelor’s degree in accounting and Business management.

Irene has worked in the public and private industries in the field of Accounting and Finance for over twenty-five years. Irene’s experience includes holding the position as Chief Financial Officer of The Fulton-DeKalb Hospital Authority, Managerial roles in the finance departments of Boston Medical Center, Turner Broadcasting, American Cancer Society and Crawford & Company.

Irene founded Abacus after many years in corporate America in the effort to meet the needs of small to medium size businesses. Abacus’ focus is providing tax and consulting services for business owners, non-profits, government contractors and entrepreneurs.

“It is my passion and privilege to partner with business owners and individuals and help them protect and grow their financial futures.”

Irene has a son who resides in Boston and enjoys reading, spin class and traveling. She currently lives in Smyrna, GA.

Irene Borum, CPA, MBA, MSA

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The Abacus Team


Betsey Dennis, CPA

Betsey has been a CPA for over twenty years. Betsey is a graduate of West Virginia University ad she holds a bachelor’s degree in Accounting.

Betsey has held various managerial roles in Trident trust, AJC, OneSource and Ikon. She is recognized as a strong leader and works hard for her clients.

Betsey is married and a mother of two and enjoys spending time with her family.


Chelsea Harrington, MST

Chelsea is a graduate of University of Georgia and holds a master’s in taxation. She is currently working towards her CPA license and has a passion for Accounting and Finance. She is a tax specialist with both individual and business tax experience.

Chelsea is a high energy and motivated individual. She enjoys helping people both personally and financially.


Maya Copeland, Tax Specialist

Maya is a tax specialist and marketing guru. She enjoys technology and finding ways to streamline client’s needs through innovation.

Maya enjoys cooking and spending time with her daughter.

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