We are experienced advisors providing the right advice to you.

Whether you’re evaluating us for the first time or are one of our long-standing clients, you’ll find our team to be highly qualified, intelligent, and friendly. We are serious about our work, dedicated to our communities and ready to play hard when the time comes.

Who We Are

We provide the highest level of professional accounting, tax and financial services available anywhere. Our central focus is always on our clients and we work closely with them to demonstrate how the numbers affect them. We understand that the services we provide significantly affect business decisions and individual lives. Our clients work hard and we help them to maintain focus and enjoy the rewards of their hard work.

Our offices are local, yet our abilities are global with far-reaching technologies. We define expectations and establish systems to provide exceptional services. What enables Siepert to deliver on this client focus is our commitment to staffing our offices with the best people, providing training, and utilizing the most advanced computer and communication technology.


In 1949, H.G. Siepert & Company was established in Beloit, Wisconsin. Over the past 66 years, Siepert has grown to include more than 20 professionals located in three offices. In 1974, our second office was established in Sycamore, Illinois followed by our Roscoe, Illinois office in 1994.

We believe in promotion from within and are proud to say that each of our partners began their careers at Siepert as staff accountants. Only after proving their skills, abilities, and commitment to customer service were they promoted. While their job titles might have changed, their commitment to client service has always remained a priority.

**Please note that all of our office locations are open to the public. Although masks are not required to enter our offices for document drop off or pick up purposes, we do require that well fitted masks be worn during appointments in our Sycamore location. In addition, Covid-19 related screening questions will be asked and temperature checks will be taken upon arrival for scheduled meetings in all office locations.

Beloit (608) 365-2266 | Roscoe (815) 623-8818 | Sycamore (815) 787-7657

Office Hours: Mon-Thurs: 8:00am-5:00pm Fri: 8:00am-12:00pm Sat & Sun: Closed