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About Us

Diane M. Mahoney

Diane M. Mahoney

President of Illinois Accounting and Tax Co, Inc.

Diane has a long history of seeking ways to save her clients money.  Since 2003, when she earned her BSA from Western International University in Phoenix, Arizona, she has been striving to remain current on ever-changing tax and accounting laws as they relate to US GAAP and IFRS.


As a proud member of the Illinois Valley Chamber of Commerce (IVAC), the AICPA and the IL CPA, Illinois Accounting & Tax Co., Inc continues to stay on top of the latest tax and accounting changes in order to promote growth and prosperity to the area.

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