Professional Tax, Payroll, and Outsourced Accounting Solutions


Kollath CPA was launched in 2007 to provide tax and accounting services to individuals and small- to mid-sized companies. Since then, the company has grown to three distinct divisions: the flagship division which offers a full range of tax and accounting services; Organic Payroll, which provides customized payroll services; and Numbers 4 Nonprofits, providing accounting and specialized support services to the nonprofit sector.​


We’re always at your fingertip with this technology solution for the always-on, mobile world. Available in the iPhone and Android App Stores.

Interested in becoming a client?

Take a look at either our checklist for individuals or our checklist for businesses to see what information we may need from you.

Then contact us today to schedule an appointment.

The Mobile CPA App is designed to give critical, at-your-fingertips information whenever you need it. It’s packed with tools you will love – GPS mileage trackers, receipt and expense management, income tracker, key deadline dates and tax updates, and real-time news from our Mobile CPA team. This powerful free tool allows us to communicate directly with you in a modern, time-efficient, and effective way.


With App use booming, we feel that this App represents the perfect tool for us to interact with existing and future customers. Enjoy the Mobile CPA App with our compliments! This powerful new free Finance & Tax App has been developed by the team at Lawrence Grant to give you key financial and tax information, tools, features and news at your fingertips, 24/7.  

Middleton 608.824.3002         Sauk Prairie 608.644.0206       Brookfield 414.751.6847

Middleton, WI 

Kollath CPA

2501 Parmenter Street, #100B

Middleton, WI 53562


PHONE: 608-824-3002

FAX: 866-486-4261


Sauk Prairie, WI 

Kollath CPA

421 Water St., Suite 111

Prairie du Sac, WI 53578


PHONE: 608-644-0206

FAX: 608-643-3467


Brookfield, WI 

Kollath CPA

295 Regency Court, Ste. 104

Brookfield, WI 53045


PHONE: 414-751-6847

FAX: 866-486-4261