Mon - Thurs 8AM - 5PM , Fri 8AM - 2PMCall Us605-342-5630Our Address810 Quincy Street Rapid City, SD 57701

About Us

Ketel Thorstenson Rapid City

OVERVIEW

Ketel Thorstenson, LLP (KTLLP) has been operating as an accounting practice in Rapid City in one form or another since 1936 when Harold Heims first opened the practice and hired A.C. (Bud) Thorstenson shortly after. The firm started in offices above the old North Western Warehouse and then moved to space above Staple & Spice. The building at the current 810 Quincy Street address was constructed in 1966; the same year that Roy Ketel and Rich Siekman worked together to form a new partnership.

GROWTH & CHANGE

The rich history of change and growth has led to three name changes and seven building remodels/additions. In addition to growing the practice, the Partners of KTLLP continue to be visionaries and delve into business solutions for their clients outside of traditional accounting services.
Ketel Thorstenson, LLP

TODAY & BEYOND

Today the KTLLP family employs over 130 professional staff members, including 18 partners, and operates out of Rapid City, Spearfish, and Custer, SD, and Gilette, WY. We are proud of our longevity and thankful for all of the clients who we consider as friends. KTLLP looks forward to many more years of continued growth serving the regional market.

CORE VALUES



BE EXCELLENT

Learn More













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TOTAL YEARS

IN BUSINESS


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CPAs

ON STAFF



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YEARS COMBINED

PARTNER GROUP EXPERIENCE


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TAX RETURNS

PREPARED YEARLY



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EGGS EATEN

ON TAX SEASON SATURDAYS


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OREOS EATEN

DURING TAX SEASON


OUR SERVICES




TAX PREPARATION & PLANNING

TAX PREPARATION & PLANNING


BUSINESS VALUATION SERVICES

BUSINESS VALUATION SERVICES


CONSULTING

CONSULTING



AUDIT,REVIEW, & COMPILATION

AUDIT,REVIEW, & COMPILATION


LITIGATION SUPPORT SERVICES

LITIGATION SUPPORT SERVICES


PEER REVIEW

PEER REVIEW



ACCOUNTING SERVICES

ACCOUNTING SERVICES


QUICKBOOKS SUPPORT

QUICKBOOKS SUPPORT


AFFORDABLE CARE ACT

AFFORDABLE CARE ACT



E-PAYROLL SERVICES

E-PAYROLL SERVICES


ESTATE PLANNING

ESTATE PLANNING


“Thank you for providing another great learning opportunity. I’m glad I came. I’m down in the weeds and it’s good to step back and get the big picture.“



Associate Director, Northern Plains Eye Foundation

Carolyn Ness

LOCATIONS




CONNECT

CONNECT


Rapid City Office


810 Quincy StreetRapid City, SD 57701


Ketel Thorstenson, LLP Spearfish Office

CONNECT

CONNECT


Spearfish Office


123 E. Jackson Blvd Suite 2 Spearfish, SD 57783
Phone: (605) 642-7676Fax: (605) 642-2616


Ketel Thorstenson Custer
CUSTER

CONNECT

CUSTER

CONNECT


Custer Office


609 Mt. Rushmore Road Custer, SD 57730
Phone: (605) 673-3220Fax: (605) 673-3114


Ketel Thorstenson Gilette
GILETTE

CONNECT

GILETTE

CONNECT


Gillette Office


305 S. Garner Lake Rd Suite A Gillette, WY 82718
Phone: (307) 685-4433Fax: (307) 682-6321

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