Rapid City, SD Phone: 605-348-1930       Gillette, WY Phone: 307-682-4795

Rapid City: 605-348-1930 ~ Gillette: 307-682-4795

CP&A: Making Life Simpler

Casey Peterson and Associates, LTD., South Dakota and Wyoming CPAs and financial advisors, is a full service accounting firm dedicated to satisfying the needs of individuals and businesses in the Black Hills of South Dakota and Northeastern Wyoming. In November of 2012, we celebrated our 35th year, marking a period of remarkable growth and inevitable change.

Rapid City, SD Location

We Are Industry Experts

Our expertise as a firm of South Dakota and Wyoming focused CPAs and financial advisors is designed to make the lives of our clients simpler, easier, and more successful. The services of our Gillette and Rapid City accounting firms currently meet the needs of the following industries:

  • Agriculture | Farmers, ranchers; all ranges of family operations.
  • Construction | Builders, electricians, plumbers, etc.
  • Healthcare | Large and small medical services and healthcare providers.
  • Government | From school districts to municipalities.
  • Non-Profits | All shapes and sizes of not-for-profit ventures.
  • Don't see your industry?. Click Here

At Casey Peterson and Associates, we pride ourselves on the long-lasting management and advice that continues to provide for this region's businesses and individuals. Our regionally-focused South Dakota and Wyoming CPAs serve as leaders in each individual industry of specialization.


Find out what makes us experts.
More About CP&A Our Leadership
We're Always Expanding

Our greatest strengths lie in overcoming the challenges presented by a dynamic market. As Casey Peterson and Associates has watched its clients evolve with the developing community, a similar transformation has taken place within its very own personnel and physical workspace. Time and progress has populated our workforce to nearly fifty employees and two locations. Our expansion as a company has taken our services to a second office of CPAs in Gillette, Wyoming, and spread the Casey Peterson and Associates reputation into the farthest reaches of the region.

In addition, the 2011 relocation of our Rapid City accounting firm from its original downtown office space to the first floor of the Turnac Tower is a prime indicator of our growth and accomplishments. We invite you to stop in at our new home and sample the refinement of our state-of-the-art surroundings.

Casey Peterson Opening

Time has strengthened the steadfast link between our mission as South Dakota and Wyoming CPAs and Financial Advisors and the dynamic worlds of the industries we serve.

Contact Us Today! Submit an RFP

Recent News -

What is a Full-Time Equivalent employee?

September 2, 2014

With the passing of the Affordable Care Act in March 2010, business owners were bombarded with new terminology.  One of the most common terms and most important to business owners is full-time and full-time equivalent employees. These terms are so significant because they are the base for determining if the employer mandate (a new term – alert!) applies to your business.  Let’s take a look at how we figure full-time and full-time equivalent employees.

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Last Modified: 09-2-2014-16:37:46


Spotlight on: Dawn Baker

August 27, 2014

Dawn Baker describes her job at Casey Peterson & Associates as unique.  She is an Accounting Tech on the audit team and focuses on non-profit accounting and consulting.

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Last Modified: 08-27-2014-15:18:58


ACA – What hours count towards employees 30 hours per week? Determining employee hours for ACA guidelines

August 19, 2014

By now you probably know that large employers only have to offer healthcare coverage to full-time employees. It has been discussed in our previous blogs that a full-time employee is anyone who works at least 30 hours per week. While it may seem easy to calculate this for hourly employees and even some salary employees, there are many employee classifications where this requirement is difficult and subject to judgment.

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Last Modified: 08-19-2014-11:34:28