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About us

Honest | Reliable | Professional

Tosa Accounting & Tax Service has been providing quality, personalized financial guidance to individuals and small businesses throughout the Metropolitan Milwaukee area since 1985.  

Our expertise includes... 

  • Accounting, bookkeeping, payroll services and financial goal setting
    for local, family-owned small businesses

  • Tax preparation for individuals and small businesses




Our Mission

is to act as an extension of our clients by providing a 

connection and open communication in order to reach 

an understanding of their individual needs, and then focus our efforts on

helping them
achieve their financial goals





Our Team

Randall R. Lauer

Owner / Operator

Over 20 years of experience in the tax and accounting field

Education: University of Whitewater, class of 1997
Degree: BS Accounting and Business Administration
Certifications: Licensed Wisconsin CPA since 2001

"My parents were small business owners, and as a small business owner myself, I have a unique perspective on the financial liabilities and stresses of running a business. I am here to share my passion for numbers / accounting/ tax preparation, so that my clients can focus on following their passion!"




Stacy Prowse

Over 20 years experience in small business marketing and management

Education: Carroll University
Degree: BS Business Management with an emphasis in Marketing
and BS Graphic Communication with an emphasis on Design