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 -

A Black Hills Non-Profit Organization has been selected as 2014 Helping You Help Others recipient

July 14, 2014

Prairie Hills Transit, a Black Hills non-profit organization dedicated to providing public transportation for people of all ages, has been selected as the inaugural recipient of the Helping You Help Others program, sponsored by the CPA firm of Casey Peterson & Associates, Ltd.

Read More

Last Modified: 07-18-2014-09:41:37


ACA Timeline: When will the New Affordable Care Act Impact My Business?

July 9, 2014

Do I have more than 50 full-time and full-time equivalent employees? Yes.  (Note: there are specific rules and prescribed formulas for determining the number of full-time and full-time equivalents for your company.)

Read More

Last Modified: 07-9-2014-13:25:42


ACA Alert: Reimbursements for Non-Employer Sponsored Health Insurance

May 29, 2014

As a business owner, you may be reimbursing your employees for premiums of non-employer sponsored health insurance.  Prior to the enactment of the Affordable Care Act, these premiums were excluded from the employee’s wages.

Read More

Last Modified: 06-24-2014-10:57:21