Which Georgia counties does AppealAlly serve?

AppealAlly serves all 159 Georgia counties. Our analysis pulls assessment data and comparable sales from the county where your property is located, so the same process works whether you live in Fulton, Gwinnett, Cobb, DeKalb, Forsyth, Cherokee, or any of the smaller rural counties. Metro Atlanta counties have the most comparable-sales data and the highest appeal volumes, so those appeals tend to be the most evidence-rich. Enter your address to see the data we have for your specific county.

When is the property tax appeal deadline in Metro Atlanta counties?

Every Georgia county mails its annual assessment notices on its own schedule, and you have 45 days from the date printed on your notice to file a PT-311A appeal. In Metro Atlanta, notices typically mail between late April (Clayton) and late May (Fulton, Gwinnett, DeKalb, Forsyth), which puts most appeal deadlines between early June and mid July. The 45-day clock starts on the notice date, not the date you receive it in the mail, so the actual deadline can arrive faster than expected. Check your specific county guide linked above or enter your address for your exact deadline.

How are property tax millage rates set in Georgia?

Georgia property tax bills are calculated as (assessed value / 1,000) times the total millage rate. Assessed value is 40% of the county's estimate of fair market value under O.C.G.A. section 48-5-7. The millage rate is set each year by three separate taxing authorities: the county commission (for county services), the local school board (usually the largest component), and the city council if the property is inside a municipality. State law caps year-over-year millage increases without a public rollback hearing. An appeal lowers your assessed value, which reduces every piece of your bill proportionally, even though the millage rate itself does not change.

What is the Board of Equalization versus arbitration?

If your county does not reduce your value at the Board of Assessors stage, you can choose how to continue. The Board of Equalization (BOE) is the default: a three-member panel of local citizens hears your case at no cost and issues a binding decision. Binding arbitration is an alternative where a certified appraiser reviews both sides' evidence; it requires a paid appraisal you submit with your appeal but can be faster and more appraiser-friendly. A third option, a hearing officer, is available for homes assessed over $750,000. Most Georgia homeowners choose the BOE because it has no out-of-pocket cost and the historical track record is strong: 82.2% of Gwinnett County appeals reached a reduction in the 2025 tax year (source: Gwinnett County Board of Assessors FOIA release of 20,229 appeals).

Do all Georgia counties allow online property tax appeals?

No, but every county accepts the statewide PT-311A form by mail or in person, which is what AppealAlly's Essentials DIY Kit prepares for you. Larger counties including Fulton, Gwinnett, Cobb, and DeKalb also offer online appeal portals, and some accept emailed PDF submissions. Smaller and rural counties are still paper-only. Because the mailed PT-311A is valid statewide, you never have to depend on a county portal being available. Our Full-Service Appeal option handles the filing channel for you in every Georgia county we serve.

Georgia County Property Tax Guides

Find property taxes in Georgia by county. Every county's appeal deadline, tax rate, and assessor contact. Select your county and see how much you could save.

Browse property tax guides for all Georgia counties below. Each guide includes local tax rates, appeal deadlines, assessor contact information, and tips to reduce your property tax bill.

Metro Atlanta Counties: Where We See the Most Appeals

Metro Atlanta counties reassess property values almost every year, and appeal deadlines typically fall between late April and early June depending on when each county mails its annual assessment notice. The six counties below cover the bulk of the homeowners we help in Georgia.

Fulton County

Fulton assesses more than 320,000 residential parcels and consistently ranks among the busiest Georgia counties for appeals. Notices generally arrive late May with a 45-day filing window. Read the Fulton County property tax appeal guide for deadline specifics and the PT-311A form walkthrough.

Gwinnett County

Gwinnett is the most data-rich county we cover. Based on a FOIA release of 20,229 Gwinnett appeal outcomes from the 2025 tax year, 82.2% of appeals that reached a decision reduced the homeowner’s assessed value, with a median reduction of $15,600 (source: Gwinnett County Board of Assessors, 2025 tax year). See the Gwinnett County property tax appeal guide for the full breakdown.

Cobb County

Cobb notices typically mail in early to mid May with a 45-day appeal window. The Cobb Board of Tax Assessors accepts both PT-311A filings and online appeals through the county portal. Review the Cobb County property tax appeal guide for comparable-sales evidence tips.

DeKalb County

DeKalb homeowners usually receive assessment notices in late May, with appeals due in early July. DeKalb uses a three-track appeal process (Board of Equalization, hearing officer, or arbitration). The DeKalb County property tax appeal guide explains which track fits which situation.

Clayton County

Clayton tends to send notices in late April, making it one of the earlier metro deadlines each year. The Clayton County property tax appeal guide walks through the filing checklist and what evidence the Clayton assessors look for.

Forsyth County

Forsyth is one of the fastest-growing counties in the metro, and fair market values shift quickly from subdivision to subdivision. Notices typically mail in late May. See the Forsyth County property tax appeal guide for neighborhood-level comparable-sales strategy.

Results may vary. County success rates, deadlines, and reduction amounts reflect historical data from the cited sources and do not guarantee the outcome of any individual appeal. Every property is evaluated on its own evidence, and appeal decisions are made by the county Board of Equalization.

All County Guides

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Frequently Asked Questions

Which Georgia counties does AppealAlly serve?: AppealAlly serves all 159 Georgia counties. Our analysis pulls assessment data and comparable sales from the county where your property is located, so the same process works whether you live in Fulton, Gwinnett, Cobb, DeKalb, Forsyth, Cherokee, or any of the smaller rural counties. Metro Atlanta counties have the most comparable-sales data and the highest appeal volumes, so those appeals tend to be the most evidence-rich. Enter your address to see the data we have for your specific county.
When is the property tax appeal deadline in Metro Atlanta counties?: Every Georgia county mails its annual assessment notices on its own schedule, and you have 45 days from the date printed on your notice to file a PT-311A appeal. In Metro Atlanta, notices typically mail between late April (Clayton) and late May (Fulton, Gwinnett, DeKalb, Forsyth), which puts most appeal deadlines between early June and mid July. The 45-day clock starts on the notice date, not the date you receive it in the mail, so the actual deadline can arrive faster than expected. Check your specific county guide linked above or enter your address for your exact deadline.
How are property tax millage rates set in Georgia?: Georgia property tax bills are calculated as (assessed value / 1,000) times the total millage rate. Assessed value is 40% of the county's estimate of fair market value under O.C.G.A. section 48-5-7. The millage rate is set each year by three separate taxing authorities: the county commission (for county services), the local school board (usually the largest component), and the city council if the property is inside a municipality. State law caps year-over-year millage increases without a public rollback hearing. An appeal lowers your assessed value, which reduces every piece of your bill proportionally, even though the millage rate itself does not change.
What is the Board of Equalization versus arbitration?: If your county does not reduce your value at the Board of Assessors stage, you can choose how to continue. The Board of Equalization (BOE) is the default: a three-member panel of local citizens hears your case at no cost and issues a binding decision. Binding arbitration is an alternative where a certified appraiser reviews both sides' evidence; it requires a paid appraisal you submit with your appeal but can be faster and more appraiser-friendly. A third option, a hearing officer, is available for homes assessed over $750,000. Most Georgia homeowners choose the BOE because it has no out-of-pocket cost and the historical track record is strong: 82.2% of Gwinnett County appeals reached a reduction in the 2025 tax year (source: Gwinnett County Board of Assessors FOIA release of 20,229 appeals).
Do all Georgia counties allow online property tax appeals?: No, but every county accepts the statewide PT-311A form by mail or in person, which is what AppealAlly's Essentials DIY Kit prepares for you. Larger counties including Fulton, Gwinnett, Cobb, and DeKalb also offer online appeal portals, and some accept emailed PDF submissions. Smaller and rural counties are still paper-only. Because the mailed PT-311A is valid statewide, you never have to depend on a county portal being available. Our Full-Service Appeal option handles the filing channel for you in every Georgia county we serve.