North Florida’s Premier Business and Tax Consultancy


Established in 2002, Thielen+ is a progressive boutique accounting firm providing tax, accounting, and business advisory services to various professionals and industries. We are currently made up of 10 highly trained professionals, including five CPAs and five non-CPA accounting professionals – all striving to meet your accounting and tax planning needs. Explore our updated website and contact us with any questions or to help you with your accounting and business needs.

Our Specialties

Tax Management

America’s tax laws are constantly changing. Historically, these frequent adjustments increase the complexity of personal and business returns. Thielen+ Tax and Business Consulting aims to relieve your stress and simplify the process of keeping up with these unrelenting tweaks to the tax code. We will customize your strategy and assist you in reducing your tax burden to the greatest extent possible.

With a focus on your future our approach to your business and tax strategy is targeted, impactful, and streamlined. We prepare returns for all types of entities, including non-profits, small businesses, partnerships, corporations and multi-state entities.


Thielen+ offers a wide array of accounting and general ledger services to businesses and individuals. We will support you in closely monitoring your business and personal financial success.

Assurance and Advisory

Assurance services may include various attest functions from Reviews to Compilations and Agreed-Upon Procedures. Assisting Firms with Bonding, Lending and Loan Covenant requirements and business planning towards Succession planning. Our boutique approach towards your success is paramount to our Firm Culture.

What Our Clients Say About Us

Thielen+ has been our accounting firm of choice since 2002. In that time, they have provided accounting services exceeding any expectation of superior service we’ve held. Through their expert knowledge and unwavering desire to please the customer, they’ve helped our company grow from a consulting company of one employee to a company of over 125. Regardless of any accounting challenge we faced, they’ve always been available with expert advice and guidance necessary to successfully navigate a path to success. Their personnel are always available and pleasant to deal with whether via phone or face-to-face. It makes no difference whether you’re are dealing with Jim Thielen or Jessica Sperling or anyone else in the company down to a junior bookkeeper, the experience is always the same . . . pleasant, accurate, and helpful. It would be hard to imagine how our company could have prospered as it has without these true partners in our journey.

James “Jim” Herdt, MCPON, USN, Ret.
CEO/CFO Herdt Consulting, Inc.

I’ve been a loyal client of Thielen+ Tax and Business Consulting for more than a decade and they’ve been an integral part of my business year in and year out. Their attention to detail, high ethical standards, and efficient service delivery are second to none.

Eric Criss, PhD
Founder and CEO, Arena Public Affairs, LLC

Jim has been my personal CPA for well over 30 years. He has also been our corporate CPA at NAI TALCOR, as well as for many of our partnerships. I couldn’t ask for a better person or firm to help us with all our needs. They’re fantastic.

E. Edward Murray, Jr., SIOR, CCIM
NAI Director/President/Broker 

Years Combined Experience

Years in Business

Leon County Locations