New tag office hours coming Jan. 3, 2022. Learn More

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Tiffany P. Porter, Esq., Gwinnett County Tax Commissioner


As the Gwinnett County Tax Commissioner, my first priority is to ensure that you receive exemplary service and can easily access all of the information you need to conveniently conduct your tax and tag business with us.

Our offices are staffed by highly skilled professionals who are dedicated to serving Gwinnett County citizens. Especially during the COVID-19 pandemic, it’s important to understand that almost all transactions can be conducted safely and securely online. You’ll find links and how-to videos and information on the home page of this site.

When an in-person visit is required, you’ll find that our offices are always looking for ways to improve our service, and welcome your feedback and suggestions to help us do even better.

If I can ever be of service, please feel free to contact me directly at



Denise Mitchell

Chief Deputy Tax Commissioner


• Biography

Robert Mann

Motor Vehicle Director


• Biography

Khadija Thomas

Finance & Accounting Director


• Biography

Lisa Matic

Property Tax Director


• Biography

Susan McLeod

Communications Director


• Biography

Distinction in government and exemplary service.

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.

What Our Customers Say About Us

"Very polite and patient counter staff. Moved through in 15 minutes."


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2017 Annual Report

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