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About Us

About Our Firm

For over 20 years, Leff, Klein & Kalfen, LTD. has been providing quality, personalized financial guidance to local individuals and businesses. Leff, Klein & Kalfen, LTD.'s expertise ranges from basic tax management and accounting services to more in-depth services such as audits and financial statements.

Leff, Klein & Kalfen, LTD. is one of the leading firms in and throughout Chicago. By combining our expertise, experience and the team mentality of our staff, we assure that every client receives the close analysis and attention they deserve. Our dedication to high standards, hiring of seasoned tax professionals, and work ethic is the reason our client base returns year after year.


Our Mission

Our mission is to help clients maintain financial viability in the present, while taking a proactive approach to achieve future goals. This requires open communication to reach an understanding of our clients' needs through research and sound analysis. Leff, Klein & Kalfen, LTD. is dedicated to meeting these goals with high standards of excellence and professionalism. We have been a staple of Chicago's business community for more than 20 years, and pride ourselves on the level of esteem we have earned.

Our dedication to hard work has earned the respect of the business and financial community in and around Chicago. We believe this to be a direct derivative of our talent and responsiveness to our client base. Whether you are a current or prospective client, rest assured that individuals and businesses who choose Leff, Klein & Kalfen, LTD. receive competent and timely advice.


Our Team

Alan Leff, CPA, MBA

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Michael Leff, CPA

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Robert Schlumpberger

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Diane Klein

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  • Leff, Klein & Kalfen, LTD.
  • 977 Lakeview Parkway Suite 130
  • Vernon Hills, IL 60061
  • Telephone: (847) 735-1040
  • Fax: (847) 735-8291

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