We began our journey October 1, 2011 in an apartment in Duluth. The first two years, we provided income tax preparation. In January 2013, we added Quick-Books and sales tax services. We quickly realized the small businesses in the area were under-serviced and hired three part-time bookkeepers in May 2013.

In October 2013, we opened our current office location at 102 E. Central Entrance in preparation for the 2013 filing season. We continue to add services and locations as we grow.


Andy Grengs, owner of TCG Accounting, enjoys meeting new people, learning about new businesses and finding ways to assist others with meeting their dreams and goals. Since October 2011, Andy has been providing income tax return preparation, accounting, and QuickBooks consulting services to a variety of clients. He is a Tax Return Preparer and QuickBooks ProAdvisor. Andy volunteers his time at the Northeast Regional Correctional Center and the St. Louis County Jail preparing income taxes. He enjoys helping out the families of those who are incarcerated. Andy actively participates in the Duluth Chamber of Commerce, Business Network International Zenith City Business Builders as the chapter President, Twin Ports Connex Young Entrepreneurs Group, Toastmasters and continuing education to develop his skills as a leader in the business sector. He recently joined the Hermantown Chamber and the Arrowhead Builders Association to further assist those in need of accounting services. In his pursuit of becoming a serial entrepreneur, he is also a partner in three other businesses with many other ideas in the works. His dream is to someday be an angel investor like those seen on Shark Tank.

Our Vision

To become a top 100 accounting firm by 2024

Our Motto

Your Success is Our Priority

Our Values



We believe in educating our clients to help them make better financial decisions throughout the year. We don't just "fill in the blanks." We want our clients to understand what we are doing and why. We work diligently to make sure clients know about all available tax credits and deductions.
Proactive Communication

Proactive Communication

We believe in communicating the latest information to our clients. Whether it's an increase in minimum wage, a new or changed tax credit or it is time to file your property tax return, we reach out to inform you. We send out monthly newsletters, post on multiple social media platforms, blog, and email breaking news updates.
Proactive Communication


We believe a key aspect to building a successful business is networking. We network not only for our benefit, but to connect our clients with others to proactively assist in their growth. We are actively involved in the Duluth Area Chamber of Commerce, Hermantown Chamber of Commerce, Superior Chamber of Commerce, Cloquet Chamber of Commerce, Business Network International, Arrowhead Builders Association, and make an appearance at many others.
Proactive Communication


We believe a team approach is important. It helps to decrease response time to questions. We know it can be frustrating if you cannot get in touch with your accountant, so why work with only one person? Every client at TCG Accounting is assigned to a team with a lead accountant in charge of communication.
Proactive Communication


Our motto says it all. At TCG we say - “Your Success Is Our Priority” - and we mean it. We do everything we can to ensure the success of our clients, whether it is training them on new software, providing bookkeeping, payroll, and tax services, or connecting them with other business owners and networking events. We love watching our clients succeed!

Our Team