John Kasperek Co., Inc. (JKC) was founded in 1989 to serve the financial needs of the Chicagoland and Northwest Indiana area. Led by accomplished governmental consulting expert - founder and managing partner John Kasperek, Jr., CPA - our talented team of Certified Public Accountants and professional staff are dedicated to providing customized services to local units of government, nonprofit organizations, corporations and individuals at an affordable rate. The firm's truly unique expertise is rooted in extensive experience through our municipal and educational auditing and consulting engagements. As a boutique company, JKC's attention to detail and hands-on service from all levels of the firm is well received by clients and our team is highly motivated and dedicated to their continued success. We have a proven track record with impeccable results–evidenced by an impressive client list. The Illinois Office of the Auditor General recently announced JKC as a Level 3 auditor of governmental audits, the highest certification.

Attention tax clients! Please download the forms for remote and drop-off services, including the 1040 Engagement Letter, the S-Corp/Partnership Engagement Letter, along with our Drop-Off Questionnaire. Provide your tax documents in-person or by mail, or contact us for secure sign-in credentials to provide electronically at This email address is being protected from spambots. You need JavaScript enabled to view it..  The tax laws are constantly changing; through our professional development program, the staff at John Kasperek Co., Inc. stays up to date on all the latest Internal Revenue Code changes.  We can prepare your tax return, whether it is a sole proprietor, partnership, corporate, tax-exempt organization, estate, or trust. For more information, download our comparison of the 2021, 2022 and 2023 tax law changes.

Please let us know how we are doing! John Kasperek Co., Inc. is seeking your feedback on our company, our employees and our services. Please complete this short survey to help us ensure that we are meeting your needs and also for your chance to win $50. The next drawing will take place on Friday, April 19, 2024. 

We all share files with people both inside and outside our company daily — it's the nature of the modern working world. We know it's important to protect our data or our clients' confidential data, but it’s cumbersome to know when and how to send files securely. Secure file sharing means more than password protection and private email servers — you need to consider how and where the files are stored, how they're protected and how safe they are when you hit 'Send'. Please email This email address is being protected from spambots. You need JavaScript enabled to view it. to get your secure sign in access before the next time you send your sensitive files to JKC.

The Mission of John Kasperek Co., Inc. is to provide the highest level of service in all aspects of accounting to a diverse client base within the community, helping them to achieve continued financial success and growth through trusted relationships. 

John Kasperek Co., Inc. is a leading expert governmental and nonprofit auditing and consulting firm in the Chicago Southland region. For more information about these services, please download our company profile or schedule a free consult by emailing This email address is being protected from spambots. You need JavaScript enabled to view it..