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Donald L. Allen, CPA

Partner, Tax

Don has more than 44 years of experience in public accounting and is a partner in the firm’s Tax department. In 1986, he formed the partnership of Allen, Haight, & Monaghan LLP, which merged with Windes in 2018.

Don’s experience includes accounting, business consulting and taxation for closely-held companies and business owners. He has designed and implemented numerous tax plans for companies and their owners resulting in significant decreases in corporate, personal and estate taxes. His expertise in areas of cost containment, business strategies and structuring transactions has been extensive and highly effective for his clients’ needs.

Don serves a wide variety of clients in the wholesale, distribution, franchise, medical, legal, brokerage, technology, and real estate sectors.


Bachelor of Science, Business Administration                                                                                                                      University of Southern California, School of Business

Professional Affiliations

  • American Institute of Certified Public Accountants, Member
  • California Society of Certified Public Accountants, Member
  • Sons of the American Legion Squadron 291, Newport Beach, Adjutant Officer
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