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Business Details
19 Years
experience
Trusted Accounting and Tax Services in Quincy, IL
Dennis G Koch CPA was established in May 2007 with over 35 years of professional experience in accounting and auditing. Our firm specializes in audits of electric cooperatives, independent telephone companies, not-for-profit organizations, small businesses, and governmental entities. Licensed in Illinois and Missouri, we provide tailored financial expertise to clients across multiple sectors. Our approach combines regulatory compliance with strategic insights to improve operational efficiency and reduce waste. We offer a full range of services including audits, reviews, compilations, and tax planning for businesses and organizations.

Our proactive tax strategy helps clients minimize liabilities through year-round compliance with evolving tax laws. Located in Quincy, Illinois, we deliver personalized service with a commitment to transparency and client education. Our online resources, including financial tools and downloadable forms, empower clients to make informed decisions. We prioritize responsiveness and maintain active communication through our website, email, and direct consultations. With a focus on credibility and long-term relationships, our firm serves as a trusted advisor to clients throughout Illinois, Missouri, and beyond.
Services
Audits Reviews Compilations Tax Services Bookkeeping Business Tax Planning Not-for-Profit Tax Services
Details
  • Year established: 2007
Highlights and features
  • We offer 35+ years of experience in accounting and auditing.
  • Our team specializes in audits for electric cooperatives and governmental entities.
  • We provide proactive tax planning aligned with current legislation.
  • Our firm delivers personalized service tailored to client needs.
  • Licensed in Illinois and Missouri for regional expertise.
Services
Audited Financial Statements
Our audits provide the highest level of assurance for financial statements, ensuring compliance with Government Auditing Standards and OMB Uniform Guidance. We specialize in audits for electric cooperatives, telephone companies, and governmental entities. Our process identifies operational inefficiencies while enhancing credibility for investors and lenders.
Tax Planning & Preparation
We offer proactive tax planning for corporations, partnerships, and nonprofits, minimizing liabilities through year-round compliance with evolving tax laws. Our expertise includes strategic return preparation and identifying opportunities for long-term tax savings across multiple jurisdictions.
Bookkeeping Services
Our bookkeeping solutions provide accurate financial record-keeping tailored to small businesses and organizations. We ensure reliable data management to support informed decision-making and seamless year-end reporting processes for clients with diverse operational needs.
People
Dennis G Koch
Owner
Dennis G Koch is a licensed CPA and Certified Government Financial Manager with over 35 years of experience in accounting and auditing. He specializes in audits for electric cooperatives, governmental entities, and nonprofits, combining regulatory compliance with operational improvement strategies.
John Niemeyer
Senior Staff Auditor
John Niemeyer is a licensed CPA with an MBA, serving as Senior Staff Auditor. He brings advanced expertise in financial auditing and compliance, supporting clients through rigorous examination processes and ensuring adherence to industry standards.
Questions
What accounting services do you offer?
We provide audits, reviews, compilations, tax planning, and bookkeeping services for businesses, nonprofits, and governmental entities.
Do you specialize in specific industries?
Yes, we specialize in audits for electric cooperatives, telephone companies, school districts, and not-for-profit organizations.
Are you accepting new individual tax clients?
No, we currently focus on business and organizational tax services rather than individual clients.
In which states are you licensed?
We are licensed in Illinois and Missouri, with regional expertise across both states.
How can I access client resources?
Our client portal provides secure access to account information, downloadable forms, and financial tools for planning purposes.