• Welcome to Kessler Orlean Silver!

    With an over 80-year history, the mid-sized accounting firm of Kessler Orlean Silver & Co., P.C., provides innovative accounting solutions to business owners, executives and managers, private investors, and professionals.

    Out down-to-earth style and practical experience come from a long-time culture of helping people and feeling passionate about doing so!

  • What Sets Us Apart

    We care. Pure and simple.

    ‘Above and beyond’ dedication to client service is our highest priority. Clients tell us they appreciate our accessibility and outstanding service. We believe it’s essential that you receive our close personal attention with prompt answers and new ideas.

    No situation is too tough or too routine. Every challenge is viewed with a fresh eye and resolved with a creative solution.

    By placing our service standards front and center in the way we conduct business, you can expect to receive the highest quality service while we help you improve your business or personal financials.

  • On the surface, accounting firms seem a lot alike. But some stand out from the crowd. So what makes KOS different? Our people. Sincerely caring, really listening, and then putting your outcome ahead of our interests. It’s our exuberant: to put you above all else.


    Based in Deerfield, a Chicago suburb, KOS serves businesses and individuals in multiple states providing business consulting, accounting and bookkeeping, and tax services.

Firm Profile

Learn more about the firm’s people, philosophies, and client service commitment.


Our monthly newsletter is available online and keeps you current on tax and financial matters.

KOS News Ticker

  • Tax Shelter in Vacation Home Rentals - Overview of complex tax rules - Whether it is a beach house, a cabin in the woods or some other place, a vacation home can be a valuable source of tax breaks, as well as rest and relaxation. For example, you can deduct property taxes along with your mortgage interest (assuming the combined acquisition debt of your main home and vacation home does not exceed $1 million). - Hypothetical situation:... More →
  • Ups and Downs of the Section 179 Deduction - Enhancement limit for 2014, reduction for 2015 - For small-business owners who frequently buy new equipment and other assets for their business activities, the new tax law enacted at the end of 2014—the Tax Increase Prevention Act (TIPA)—provides a temporary reprieve. Signed on December 19, 2014, TIPA extended a Section 179 deduction retroactive to January 1, 2014. But this provision... More →
  • Filing Tax Returns, Even if Past Due - Bruce Kreisman, Supervisor bkreisman@koscpa.com - If you are reading this you are most likely one of our valued clients. And if you are a KOS client you are in compliance with your tax filing requirements. But maybe you know of, or suspect, someone has not been filing their tax returns. Perhaps you’ve even wondered, am I a fool for filing my tax returns? Why not roll the dice and see if the IRS... More →
  • Geoff Harlow offers tips on how to get the most out of your tax refund on CBS News - KOS Partner Geoff Harlow was featured on the CBS News Sunday, February 22, 2015. He discussed different tax tips for getting the most out of your refund. He touched on common mistakes made during tax season, overlooked deductions and different online methods for filing taxes. - We are very proud of Geoff and how well KOS was represented! Visit the link to view the segment: -... More →
  • New Law Renews Expired Tax Provisions - One-year extension retroactively approved - After lengthy debate, Congress finally approved a laundry list of “tax extenders” before it adjourned in 2014. But the respite is only temporary. The Tax Increase Prevention Act of 2014 (TIPA)—signed into law on December 19, 2014—applies retroactively to the beginning of 2014 but lasts for just one year. Congress is reviewing these measures for... More →
"[KOS is] friendly, approachable, and always willing to help me find the answer to a question." - Joan Meyer La James International College