We work with you on a personal level to determine the best solutions for your unique needs, then leverage our seasoned expertise to achieve the best possible results.


We are your trusted partner in success. Our firm is large enough to offer a full range of professional services at a fair price, but small enough to give you the individual attention that you deserve.


Rest assured that when a need arises, our firm is ready and capable to handle everything for you so you can focus on what matters most to you.


We want to make sure that you are in touch with us throughout the year to put you in the best tax position come April. Like dentists, regular checkups are important. A call or a visit during the year can save big headaches come tax time.


Timothy Osowski

Tim and Theo

Timothy got his start in accounting at Reilly, Penner, & Benton, LLP., Wisconsin’s oldest registered CPA firm. While there, he had the opportunity to obtain invaluable knowledge and experience in both audit and tax. From there he went to work at the family accounting firm, Osowski Accounting Office. He brought a new perspective that led to ten years of professional service specializing in tax and small business accounting. When an opportunity arose, Timothy opened his own office in Downtown Grafton.

In addition to his years of service in the field, Timothy has an extensive educational background in accounting. He holds a Master’s Degree in Accounting from the University of Wisconsin – Milwaukee, a Bachelor’s Degree in Accounting from the University of Wisconsin – Milwaukee, and an Associate’s Degree from the University of Wisconsin – Washington County. He is a member of both the National Society of Accountants and a former member of the National Association of Tax Professionals.

Timothy maintains a high level of involvement in his community, most notably serving on the Board of Directors for the City of Festivals Foundation, Inc. in Milwaukee. While on the board for the foundation, Timothy held the position of Treasurer from June 2002 to June 2010 and Director from June 2010 to June 2012. He has also been an active member in his church and served a brief period on the Stewardship committee at SS. Peter & Paul Catholic Church. He currently serves as a Commissioner for the City of Port Washington Harbor Committee.

Originally from West Bend, Timothy lived in Grafton for a couple of years before settling in Port Washington. Timothy has a beautiful young family. He and his wonderful wife Kelly have three amazing young children! Theodore pictured to left.

Timothy is proud to provide dedicated service to Grafton, Cedarburg, Port Washington, and surrounding communities in Ozaukee and Washington counties by bringing a high standard of quality, professional, and affordable accounting and tax preparation services.