Janet Hartung Renfert, CPA, Managing Shareholder


P 608-233-8333

email-blue linkedin








Janet Hartung Renfert, CPA is the managing shareholder at Porter & Sack, CPAs.  As a shareholder, Janet provides business and tax consulting services to small businesses and individuals.  She works with a broad range of closely held and growing businesses to assist with tax planning, financial decisions, business succession and business improvement strategies. Janet also manages financial statement preparation and accounting engagements as well as income tax planning and preparation including implementing various tax savings strategies.  She enjoys working closely with business owners and their key advisors to meet their goals and overcome business challenges.

University of Wisconsin- Whitewater, BAA in Accounting

Professional Affiliations
American Institute of Certified Public Accountants, AICPA
Institute of Management Accountants, IMA
Wisconsin Institute of Certified Public Accountants, WICPA
Wisconsin Association of Accountants, WAA

Community Involvement
High Point Swim Club Board Treasurer
Middleton-Cross Plains Area School District Education Foundation Member
United Way of Dane County Audit & Finance Committee Member
United Way of Dane County Rosenberry Society Founding Member
Former Madison College Foundation Board Treasurer
Leadership Greater Madison, Graduate
Small Business Development Center Instructor

Awards & Recognition
WICPA, Southern Chapter Most Active Member
Madison InBusiness,  40 Under 40