About Butler & Eichstaedt CPAs, LLC For over 20 years Butler CPA, SC has been a respected firm in Hudson, WI.  Almost 10 years after being in the firm Kay Eichstaedt joined as partner in the fall of 2008 and Butler & Eichstaedt CPAs, LLC was created. With over 25 years of service in Hudson, Butler & Eichstaedt CPAs, LLC continues to provide high quality accounting and tax services with individualized attention to each customer. While most of our clients are located in the St. Croix River Valley area in Wisconsin and Minnesota, we also serve clients through out the United States and other countries. We serve clients with a multi-state and international presence. If you have any accounting, tax or business consulting needs please contact us to see how we may be of service to you.