• Welcome to KOS!

    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.

    Our 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

  • Facts and Figures - Social Security—The Social Security Administration (SSA) announced that the Social Security wage base is increasing in 2018, but not by much. It says the 6.2% Social Security tax will apply to $128,700 of wages in 2018, up from $127,200 in 2017. That’s an increase of slightly more than 1% as compared with the increase of more than 7% the prior year. The 1.45% HI (Hospital Insurance) tax still... More →
  • Tax Reform - Stay Tuned - Congress is currently considering major tax reform, with a bill already passed by the House of Representatives, and a somewhat different bill being considered by the Senate. As this is being written on November 27 the Senate bill is still being tweaked, and it isn't clear exactly what a final Senate bill will contain. - Even after the Senate passes a bill, the House and Senate versions must be... More →
  • Five Ideas for a 2018 Business Plan – Practical Suggestions for the Year - It is 2018… do you know where your business plan for this year is? Developing a business plan for the upcoming year is a laborious task, but it is often critical to the continued success of the operation. Although the details will vary from company to company, the best approach is to confront the challenges expected for the year and address the strengths and weaknesses within the organization.... More →
  • Foreign Asset Reporting - Bruce Kreisman, Tax Supervisor - If you own or have signature authority over foreign financial assets you may be required to file United States forms reporting these assets. Two distinct, but loosely related forms may be needed. The first is FinCEN Form 114, Report of Foreign Bank and Financial Accounts. It is often referred to as the “FBAR.” You file it with the office of Financial Crimes... More →
  • Helpful Tips to Tackle Student Loan Debt - Colin McDaniels, Professional Staff Level 2 - Paying off student loans can be an overwhelming experience. According to “The State of Student Loan Debt in 2017 Report,” at makelemonade.com, a personal finance web based resource, the average student loan debt for a 2016 college graduate is $37,172. For many recent graduates the six month student loan grace period is coming to an end. This means... More →
"[KOS is] friendly, approachable, and always willing to help me find the answer to a question." - Joan Meyer La James International College