Rate Breakdown

Property taxes in Gwinnett County are calculated by multiplying the assessed value (minus exemptions) by the total local millage rate.

How Property Tax Works in Gwinnett County

Gwinnett County determines property tax liability through two core elements: the assessed value of the property and the applicable millage rates. The County Tax Commissioner’s office conducts assessments every year on a January 1st “tract” basis. An assessor reviews recent sales, construction costs, and market trends to assign a “true market value” to each parcel. This value is then multiplied by a uniform assessment ratio of 40 % (the state‑mandated “Fair Market Value” conversion) to produce the taxable assessed value.

Once the assessed value is set, the total tax bill is calculated by applying the combined millage rates of all taxing authorities that serve the property—city, school district, special districts (e.g., fire, transit), and the County itself. One mill represents $1 of tax per $1,000 of assessed value. For example, if the combined millage rate for a residential parcel is 23.65 mills, a home with a $200,000 market value (assessed at $80,000) would owe:

$80,000 ÷ 1,000 × 23.65 = $1,892.

Millage rates are subject to change each fiscal year after budget approvals, so the estimator tool updates automatically to reflect the latest rates published by the Georgia Department of Community Affairs and the Gwinnett County Board of Commissioners.

Available Exemptions

Georgia offers several property‑tax exemptions that can reduce the assessed value before the millage rate is applied. In Gwinnett County, the most common exemptions include:

• Homestead Exemption: A $2,000 reduction for owner‑occupied residences. The exemption is automatic for qualifying owners who file a homestead declaration with the County Clerk.
• Senior Citizen Exemption: Residents age 65 + may receive an additional $2,000 exemption if they meet income limits (generally $7,500 per month for the household).
• Disability Exemption: Qualifying individuals with a permanent physical or mental disability can claim a $2,000 exemption, plus any applicable senior exemption if age criteria are also met.
• Veteran Exemption: Veterans who served honorably may receive a $2,000 reduction. Those who are disabled as a result of service can also qualify for the senior or disability exemptions, maximizing the total benefit.

Exemptions must be applied for on a yearly basis via the Gwinnett County Tax Commissioner’s online portal. Supporting documentation, such as proof of age, disability ratings, or military service, is required at the time of filing.

Payment Schedule & Deadlines

Property taxes in Gwinnett County are due in two installments:

• First Installment: Due November 1st (or the first business day after the 15th of the month if November 1st falls on a weekend/holiday). The amount is 50 % of the total bill.
• Second Installment: Due February 1st (or the first business day after the 15th of the month if February 1st falls on a weekend/holiday). The remaining 50 % is paid at this time.

Taxpayers may also elect to pay the full amount early for a modest discount offered by some municipalities, though Gwinnett County itself does not provide a statutory early‑pay incentive. Late payments incur a 5 % penalty after the due date, plus interest at the state‑mandated rate of 0.5 % per month. Persistent delinquency can result in tax lien filings, property seizure, and loss of ownership rights.

Appealing Your Assessment

If you believe your property’s assessed value is inaccurate, you have the right to appeal to the Gwinnett County Board of Equalization (BOE). The appeals process follows these steps:

• File a Formal Appeal: Submit a written protest to the BOE within 30 days of receiving your Notice of Valuation. Include supporting evidence such as recent comparable sales, independent appraisals, or documentation of property damage.
• Schedule a Hearing: The BOE will set a hearing date, typically within 30‑45 days of the filing. You may appear in person or, if the property is out‑of‑state, request a remote hearing.
• Present Your Case: During the hearing, provide a clear, concise argument and any relevant documents. The BOE may also conduct its own inspection.
• Receive a Decision: The BOE issues a written determination within 15 days of the hearing. If you disagree with the outcome, you can appeal further to the Superior Court of Gwinnett County.

Remember, appealing does not pause your payment obligations; taxes must still be paid by the statutory deadlines to avoid penalties.