Pursue Your Passion,
We’ll Handle

the Paperwork

Loyally serving Wauwatosa, Brookfield

and Metro Milwaukee since 1985!


Tax Preparation

At Tosa Accounting & Tax, we leverage our 20+ years experience to prepare complete and accurate personal and business tax returns.  



Our comprehensive accounting services can be customized to suit your needs.

We utilize the power and flexibility of QuickBooks Online to provide real-time results so you can manage your business effectively.


Pay your employees quickly and easily with our full-service payroll.

Services include electronic filing of payroll tax returns, automated payroll tax payments, and direct deposit of employees’ paychecks.

About tosa accounting & tax

Since 1985, Tosa Accounting & Tax has been providing quality, personalized financial guidance to individuals and small businesses throughout the Metropolitan Milwaukee area. Our expertise ranges from basic tax preparation and accounting services to more in-depth services such as financial statement compilation and tax planning.

Our mission

Our mission is to act as an extension of our clients by providing a personal 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.

Serving your business

From start-ups to established small businesses, we strive to meet each client’s specific needs, to assist them in planning for the future, and aid them achieving their goals in an ever-changing financial and regulatory environment.


Awesome team! Always great communication and support from Randy & Stacy (and formerly Norm)! Over the years Tosa Accounting has walked us through transitioning from our daily jobs to leaving them and setting up our own business and has helped guide us as it has grown over the years. We still use them even though we moved out of the area. They are a trusted part of our financial team now, can’t recommend enough!

- Kurt Moeller

Fast effective tax return processing. As well as advice on taxes as we transitioned into retirement.

- Tom Wolff

They do an excellent Job! They handled all the paper work dealing with our personal and business taxes! Great attention to detail!!! Very personable and professional! We highly recommend this company!!!

- Beth Grbich

“We use Tosa Accounting & Tax Service for our business and personal accounting and tax needs. The team is very thorough, answers all of our questions and is very timely with their responses. And the team is knowledgeable and friendly, which is extremely helpful when it comes to taxes!”

- Kristen Davis

“Randy runs a tight ship here! Actually the whole staff has been wonderful! since someone will return my emails or calls in a timely fashion. They take care of my personal, business and real estate taxes and have been very accommodating with questions or to just help educate me on best options. Randy has made numerous suggestions in structuring my taxes so that I save money. Highly recommended!”

- David VanRixel, VanRixel Productions


Randy Lauer, CPA


25 years of experience in the tax and
accounting field

University of Whitewater, class of 1997

Bachelor of Science in Accounting and
Business Administration

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 Office Manager

Stacy Prowse

Office Manager

Over 20 years experience in small business management, including eight years with Tosa Accounting & Tax

Carroll College, class of 2003

Bachelor of Science in Business Administration with an emphasis in Management
Bachelor of Science in Graphic Communication with an emphasis in Design




By Appointment

Monday – Friday 9 am to 6 pm

Saturdays 9 am to 2 pm