Kollath & Associates, CPA LLC is a full-service accounting firm providing you with accounting, tax, bookkeeping, and payroll services.  With offices in Brookfield, Madison, Middleton, and Prairie du Sac, we work with businesses, individuals, and nonprofits. We also provide expert financial consulting and contract CFO/Controller services to organizations throughout the region. 


Why Us? 

We offer quality service at a reasonable price, and we work one-on-one with each client to customize our engagements based on your individual needs.

Don't let your accounting become a roadblock for your business.

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This powerful free finance & tax app from the team at Mobile CPA gives you key financial and tax information, tools, features, and news at your fingertips.

Kollath CPA is a team of dedicated tax and accounting professionals who are passionate about helping their clients succeed. We utilize the latest technology to provide one-on-one service, and are focused on helping businesses, nonprofits and individuals reach their goals.



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.



We believe in philanthropy! We give back to the communities we serve. Helping promote the welfare of others through time or monetary support is our passion. Find out more about the organizations we support.



Middleton, WI 

Phone: 608-824-3002

Fax: 866-486-4261

Sauk Prairie, WI  

Phone: 608-644-0206

Fax: 608-643-3467

Brookfield, WI  

Phone: 414-751-6847

Fax: 866-486-4261