Depend on Our People.

You want partners who understand your business and its unique needs. Partners who are proactive, experienced and knowledgeable – who understand your passion and care about your success.  At Olsen Thielen, we pride ourselves on our history of building long-lasting partnerships with our clients.  Our focus is on helping you achieve your organization’s goals. We offer a rare combination of experience, specialized skills and principles, and are committed to delivering outstanding service and value to your business.

Count on Our Advice.

Today’s business environment presents ever greater challenges and requires you to draw upon all your strategic and advisory resources to plan and execute effectively.  At Olsen Thielen, we offer the wide range of services and industry expertise that you might find in a larger firm, with the personalized attention of a smaller firm.  You can rely on our experience and dedication to help you achieve not only your goals for today, but your vision for the future.

Olsen Thielen is a full service accounting and consulting firm, and a “Top 25” firm in Minneapolis and St. Paul, Minnesota. We focus on providing top quality solutions for our clients through our traditional accounting and tax services, as well as non-traditional services like valuations, business succession planning,  employee benefits and human resources consulting, back-office cloud accounting solutions, estate, gift and financial planning, and fraud and forensic accounting.

Olsen Thielen was founded on the belief that personal attention, trust, and quality service were the key elements to helping our clients succeed.  95 years later, that commitment remains.  Our longevity and growth can be attributed to building strong relationships with our clients and continuing to earn their trust.

Learn about what makes us different

The Olsen Thielen Experience

The Olsen Thielen Advisor

Available in print or electronically, this bi-monthly newsletter provides current and timely information to clients and subscribers. Between publications important tax and industry updates are published on our Advisor Blog.

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  • foreign

Reporting and Withholding Requirement for Payments to Foreign Independent Contractors

February 15th, 2018|0 Comments

Federal reporting and withholding rules for payments for personal services made to foreign nationals depend [...]

  • SEP

Small Business Owners: A SEP in 2017 May Be Last Tax Saving Opportunity

February 14th, 2018|0 Comments

Are you a high-income small-business owner who doesn’t currently have a tax-advantaged retirement plan set [...]

  • opportunities

Dealing with Today’s Challenges and Opportunities – How Olsen Thielen Can Help You Respond

February 13th, 2018|0 Comments

From an accounting and taxes angle, our clients may have never seen as much change [...]

 A Commitment to Quality and Success

KM Telecom

Building Long-Term Partnerships Beth Tollefson is the CFO and fourth generation owner at KMTelecom in Kasson, Minnesota.  She has worked with Olsen Thielen & Co., Ltd. as long as she can [...]

JUX Law Firm

When Mark Santi, a Minneapolis-based attorney with JUX Law Firm, was approached by one of his clients who had concerns that he was potentially a victim of fraud in his business, Santi called on the fraud and forensics experts at Olsen Thielen.

Integrity Medicolegal Enterprises

Integrity’s relationship with Olsen Thielen began as a response to heightened interest from clients and prospects around the issue of data security. They wanted to take the next logical step and conduct a Service Organization Controls (SOC) audit.


Olsen Thielen has the knowledge and experience to serve a diverse client base across a wide range of industries.


Large enough to provide full service expertise, yet small enough to provide timely, personalized service.

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