Gwinnett County home values have climbed for three consecutive years, and your 2026 property tax bill likely reflects that increase. For a typical $425,000 home in unincorporated Gwinnett County, the annual tax bill is around $5,856.
If that number feels too high, you have until June 29, 2026, to file an appeal and potentially lock in a lower assessed value for three years.
This guide breaks down Gwinnett County's 2026 property tax rates, key deadlines, homestead exemptions, the step-by-step appeal process, and how Ownwell can handle the entire Georgia property tax appeal on your behalf.
Key Takeaways
The total millage rate in unincorporated Gwinnett County is 34.86 mills for 2026; city residents may pay additional city millage on top of that.
Your 2026 appeal deadline is June 29, 2026 (45 days after assessment notices are mailed).
Property tax payments are due October 15, 2026, with a 5% penalty plus 1% monthly interest for late payments.
The homestead exemption application deadline is April 1 of each tax year, with a 45-day late window after notices are mailed.
Ownwell charges a 35% contingency fee in Georgia, meaning you only pay if you save.
Understanding Gwinnett County Property Tax Rates
Gwinnett County calculates your property tax bill using three components: your property's fair market value, applicable exemptions, and the local millage rate (the tax rate applied per $1,000 of assessed value).
In Georgia, your assessed value is 40% of your appraised fair market value (FMV). The county Board of Tax Assessors determines your FMV based on comparable sales and market conditions. If you qualify for exemptions, those reduce the taxable portion of your assessed value.
The formula is: Annual Property Tax = (Assessed Value - Exemptions) x Millage Rate
For unincorporated Gwinnett County, the combined 2026 millage rate across county, school, and special district components totals 34.86 mills, according to the Gwinnett County Tax Commissioner and Gwinnett County property tax rate data. Here is what that looks like for a typical Gwinnett County home:
Step | Calculation | Amount |
|---|---|---|
Fair Market Value | Appraised by the county | $425,000 |
Assessed Value (40% of FMV) | $425,000 x 0.40 | $170,000 |
Standard Homestead Exemption | $170,000 - $2,000 | $168,000 |
Millage Rate (unincorporated) | 34.86 mills (0.03486) | — |
Estimated Annual Tax | $168,000 x 0.03486 | ~$5,856 |
After a Successful Appeal | ||
Reduced Fair Market Value | Lowered through appeal | $375,000 |
New Assessed Value (40%) | $375,000 x 0.40 | $150,000 |
After the Statewide Homestead Exemption | $150,000 - $2,000 | $148,000 |
New Annual Tax | $148,000 x 0.03486 | ~$5,159 |
Annual Savings | $5,856 - $5,159 | ~$697 |
Gwinnett County Millage Rates by Area
Your total millage rate depends on whether you live in unincorporated Gwinnett or within a city's limits. Some cities have their taxes billed directly by the county, while others bill city taxes separately.
Below are the certified 2026 millage rates from the Gwinnett County Tax Commissioner.
Area | 2026 County-Billed Millage Rate | Notes |
|---|---|---|
Unincorporated Gwinnett | 34.86 mills | Includes county, school, and special district levies |
Lawrenceville | 31.60 mills | City taxes (3.26 mills) are billed separately by the city |
Duluth | 31.60 mills | City taxes are billed separately by the city |
Suwanee | 31.60 mills | City taxes are billed separately by the city |
Snellville | 31.60 mills | City taxes are billed separately by the city |
Lilburn | 31.60 mills | City taxes are billed separately by the city |
Norcross | 31.60 mills | City taxes are billed separately by the city |
Berkeley Lake | 35.694 mills | Includes city levy of 1.194 mills |
Grayson | 36.485 mills | Includes city levy of 1.985 mills |
Peachtree Corners | 34.50 mills | — |
Dacula | 34.50 mills | — |
City residents in Lawrenceville, Duluth, Suwanee, Snellville, Lilburn, and Norcross receive a separate city tax bill in addition to their county bill. Contact your city for its current millage rate and your 2026 tax bill.
Important Trends, Dates, and Deadlines
Staying ahead of Gwinnett County's property tax calendar can save you from missed deadlines and late penalties. Here are the trends and dates that matter most in 2026.
Assessment Trends
Gwinnett County property values have risen steadily, and annual tax revenue reflects that growth. According to Gwinnett County's 2024 Annual Report, total property tax revenue collected and disbursed has increased year over year:
2022 | 2023 | 2024 | |
|---|---|---|---|
County Revenue | $765,955,270 | $844,986,861 | $927,878,511 |
That is a 21% increase from 2022 to 2024. Ownwell customers save an average of $774 per year on their property tax bills through successful appeals.
Rising property values drive higher assessments, which means your 2026 tax bill may be higher than last year, even if the millage rate stays flat. If your home has been overassessed, appealing it could reduce what you owe.
Key Dates for 2026
Date | Event |
|---|---|
April 1 | Homestead exemption application deadline |
May 15 | 2026 assessment notices mailed |
June 29 (45 days after notices) | Appeal filing deadline |
October 15 | Property tax payment due date |
Missing the appeal deadline means you accept your 2026 assessed value with no recourse until next year. Mark these dates now to protect your options.
How Much Are You Over Paying?
How to Pay Your Gwinnett County Property Taxes
Gwinnett County property taxes are due October 15, 2026. You can pay in three ways:
Online: Through the Gwinnett County Tax Commissioner's website using a bank account or credit card.
By mail: Send a check or money order to the Gwinnett County Tax Commissioner's Office, P.O. Box 372, Lawrenceville, GA 30046.
In person: Visit the Tax Commissioner's Office at 75 Langley Drive, Lawrenceville, GA 30046.
Late payments trigger a 5% penalty on the unpaid balance, plus 1% monthly interest until the balance is settled.
If you're waiting on the outcome of an appeal, you should still pay the undisputed portion of your tax bill by October 15 to avoid penalties.
Homestead Exemptions in Gwinnett County
If your Gwinnett County property is your primary residence, you likely qualify for at least one homestead exemption. These exemptions reduce your assessed value before the millage rate is applied, directly lowering your annual tax bill.
Exemption Type | Eligibility | Corrected 2026 Benefit Details |
|---|---|---|
Standard Homestead (S1R) | Primary residence, any age | $10,000 off County, $8,000 off School, and $7,000 off Recreation assessed values. (Approx. $600-$700 savings at 34.86 mills). |
Regular School (Age 62+) | Age 62+ by Jan 1; Net income < $10,000* | Partial school tax exemption (up to $10,000 of assessed value) plus standard county exemptions. |
Senior School (L5A) | Age 65+ by Jan 1; Net income < ~$124,648** | 100% Exemption from Gwinnett County School & School Bond taxes (the largest part of your bill) on the home and up to 1 acre. |
Senior ($20k) Exemption | Age 65+ by Jan 1; Net income < $10,000* | $20,000 off assessed value for County, School, and Recreation taxes. |
Disability / Disabled Vet | 100% Disabled Veteran or Surviving Spouse | $126,526 (2026 adjusted amount) off assessed value for all tax levies. Often results in a $0 tax bill for average-priced homes. |
The application deadline is April 1 of the tax year. If you miss it, you have a 45-day late window after assessment notices are mailed. Apply through the Gwinnett County Tax Assessor's Office with proof of residency, age, or disability as applicable.
One important note: Gwinnett County did not adopt the floating homestead exemption enabled by House Bill 581 (HB 581) and Georgia Amendment 1. That means your assessed value can still rise with the market each year, with no cap on the rate of inflation. Appealing an over-assessment is your primary tool for keeping your bill in check.
How to Appeal Your Gwinnett County Property Tax Assessment
If your 2026 assessment overstates your home's market value, you have the right to appeal. With an 88% success rate on property tax appeals, Ownwell has found that the strongest outcomes come from filing early with well-organized evidence. Here is the process in Gwinnett County:
Review your assessment notice:
Compare the county's appraised fair market value with recent sales of similar homes in your neighborhood.
File your appeal online or by mail: Use Gwinnett County's online portal to submit a letter of disagreement, or mail a completed PT-311A appeal form to: ATT: Appeals, Gwinnett County Assessors' Office, 75 Langley Drive, Lawrenceville, GA 30046.
Receive the county's response: If the Tax Assessors' Office agrees to change your value, you will receive an amended notice of assessment.
Request a Board of Equalization (BOE) hearing: If you are dissatisfied with the assessor's response, escalate to the BOE for an independent review.
Attend a settlement conference: If you disagree with the BOE's decision, you can request a settlement conference with the Tax Assessors' Office.
Appeal to Superior Court: If the settlement conference does not resolve the dispute, you can file an appeal with the Gwinnett County Superior Court.
One risk to know: Georgia is one of the few states where your assessed value can increase as a result of a failed or poorly supported appeal.
That is why evidence quality matters. Ownwell reviews relevant market data before filing and may advise against an appeal if the risk outweighs the potential savings.
Evidence You Need for a Successful Appeal
The strongest appeals are built on documented, verifiable evidence. Here is what to gather:
Recent comparable sales: Closing prices for similar homes in your area within the past 12 months. We achieve an 88% success rate on property tax appeals, and comparable sales evidence is consistently the strongest foundation for a winning case.
Photos: Document structural issues, deferred maintenance, or property factors that reduce value.
Professional appraisals: A licensed appraisal from the past one to two years provides independent support.
Neighborhood comparisons: Show how your assessed value compares to similar properties nearby.
Prior assessment history: A significant year-over-year jump in assessed value can signal an over-assessment worth challenging.
The 299C Three-Year Property Tax Freeze
The 299C three-year freeze locks your assessed value at its new lower level for three years after a successful appeal. If you appeal your assessed value to the Board of Equalization and win any reduction, the county holds that lower amount in place for three consecutive tax years.
That means three years of savings from a single appeal, not just one. For Ownwell, there is a $20 fee for the 299C filing on top of the 35% contingency cost, but a homeowner who saves $697 per year through an appeal would keep roughly $2,091 in total savings over the three-year freeze period.
Building the strongest possible case on the first appeal maximizes the value of this freeze.
Recent Legislative Changes Affecting Gwinnett County Property Taxes
To protect homeowners from rapidly rising property values, Georgia voters passed Georgia Amendment 1, which originated as HB 581. The amendment introduced the floating homestead exemption, which limits property tax increases for homeowners to the state's inflation rate.
However, Gwinnett County and its school districts opted not to adopt this exemption.
That means Gwinnett homeowners will not receive this protection, and your assessed value can still increase significantly from one year to the next. Even if your millage rate holds steady, your tax bill may continue to rise as property values climb.
How Ownwell Can Help
Appealing your Gwinnett County property tax assessment on your own takes time, research, and familiarity with county procedures. Ownwell handles the entire process end-to-end: evidence gathering, filing, negotiations, and hearings.
Ownwell achieves an 88% success rate on property tax appeals, with average annual savings of $774 and a 4.7-star rating based on 3,000+ Google reviews. In Georgia, Ownwell charges a 35% contingency fee, meaning you pay nothing upfront and only pay if your appeal delivers savings.
Whether you are filing for the first time or have been through the process before, Ownwell's team of Georgia property tax appeal specialists and proprietary software builds the strongest possible case for your property. See how much you could save on property taxes.
Your Neighbors Might Be Paying Less...
Frequently Asked Questions
What Is the Property Tax Rate in Gwinnett County?
The total 2026 millage rate in unincorporated Gwinnett County is 34.86 mills, which includes county, school, and special district levies. If you live within a city such as Lawrenceville or Norcross, you may also owe city taxes billed separately, which increases your total tax burden.
When Are Gwinnett County Property Taxes Due?
Property taxes are due October 15. Late payments incur a 5% penalty on the unpaid balance plus 1% monthly interest.
Do You Have to Pay Property Taxes After 65 in Gwinnett County?
Yes, but senior homestead exemptions for residents age 62+ and 65+ can significantly reduce your tax bill, particularly the school tax portion. Apply by April 1 through the Gwinnett County Tax Assessor's Office.
How Do I File a Property Tax Appeal in Gwinnett County?
You can file through Gwinnett County's online appeal portal or by mailing a completed PT-311A form to the Assessors' Office. You have 45 days from the date your assessment notice is mailed.
Can Your Property Taxes Go Up if You Appeal in Georgia?
Yes. Georgia is one of the few states where your assessed value can increase from a failed or poorly supported appeal. That is why the quality of your evidence matters. Ownwell reviews relevant market data before filing and may advise against an appeal if the risk outweighs the potential savings.
