I'm Tiffany P. Porter. As your Tax Commissioner, my goal is to provide you with excellent service along with a website that gives you the information and tools you need. I hope you’ll find it easy to use and that you quickly find the information you’re looking for. 

My office is staffed by an exceptional group of people dedicated to serving the citizens of Gwinnett County. We are extremely proud of how we operate and welcome your comments and suggestions on how we can do even better. I’m always happy to hear from you at taxcommissioner@gwinnettcounty.com



Denise Mitchell

Chief Deputy Tax Commissioner


• Biography

Khadija Thomas

Finance & Accounting Director


• Biography

Lisa Matic

Property Tax Director


• Biography

Robert Mann

Motor Vehicle Director


• Biography

Susan McLeod

Communications Director


• Biography

A Leader in Public Service

The Gwinnett Tax Commissioner's Office will provide tag and tax services that are accessible and responsive to the needs of citizens through innovation, technology, and a professional workforce.

The Tax Commissioner is an elected Constitutional Officer responsible for the collection of property taxes, including the processing of homestead exemptions, preparation of the county tax digest, billing of taxes, and the accounting for and distribution of those taxes.

Property taxes include those assessed on real estate, public utilities and ad valorem taxes on motor vehicles and mobile homes. These collections are disbursed to state, county, school and city governing authorities. The Tax Commissioner also acts as an agent of the state for the titling and registration of motor vehicles, and is responsible for the operation of the tag offices located in the county.

A large percentage of the revenue realized by the Gwinnett County Board of Commissioners and Board of Education is generated from ad valorem taxes collected by the Tax Commissioner. The financial stability of these institutions largely depends upon the efficient operation of the Tax Commissioner's office. Cities also benefit from taxes collected on motor vehicles, mobile homes and heavy-duty equipment. The Tax Commissioner is also responsible for collecting special fees assessed by the Board of Commissioners.

Core Beliefs

  • Exist to serve customers
  • Foster teamwork
  • Encourage proactive innovation
  • Provide meaningful and challenging work that matches employee skills and interests
  • Establish an ethical and open work environment
  • Lead by fact to remain conservative stewards of public resources
  • Plan for the future

What Our Customers Say About Us

"Busy on a Saturday morning, but the staff was outstanding!"


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2017 Annual Report

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