Metro Atlanta property tax rates vary widely. Effective rates range from 0.68% in Cobb, Cherokee, and Forsyth to 0.97% in Clayton — a gap exceeding $3,200 per year on a $400,000 home. See how all 15 counties rank by millage and median tax bill.
# Metro Atlanta Property Tax Rates Compared: Which County Charges the Most?
Two homeowners buy identical $400,000 houses on the same day — one in Fayette County, the other in DeKalb County. Before exemptions, the DeKalb homeowner pays $6,974 per year in property taxes. The Fayette homeowner pays $3,738. That $3,236 annual gap adds up to more than $96,000 over a 30-year mortgage.
When you compare metro Atlanta property tax rates county by county, gaps of a thousand dollars or more on the same home are routine. Georgia ranks 26th nationally with a 0.77% average effective rate — solidly middle of the pack. But within the metro, effective rates range from 0.68% to 0.97%, and total millage spans from 23 to 44 mills.
Whether you're a current homeowner questioning your tax bill or a buyer weighing where to purchase, here's how all 15 major metro Atlanta counties stack up — ranked, broken down by component, and sourced from official county records. For the full 159-county ranking, see our statewide property tax rate guide.
The effective tax rate — median annual tax divided by median home value — is the best apples-to-apples measure of what homeowners actually pay. It accounts for exemptions, credits, and real-world tax burdens that raw millage rates miss.
Source: 2024 American Community Survey estimates. Effective rate = median annual tax ÷ median home value.
A few things jump out immediately.
Clayton County has the highest effective rate (0.97%) but the lowest median tax bill ($2,567) in the metro — because home values are the lowest ($264,900). Meanwhile, Forsyth County has the lowest effective rate (0.68%) but the third-highest median tax bill ($4,384) — because its median home value ($642,700) is more than double Clayton's.
The takeaway: effective rate tells you how much of your home's value goes to property taxes each year. Median tax bill tells you what most homeowners actually write a check for. Both matter, but they tell different stories.
Every Georgia county uses the same formula:
Fair Market Value × 40% = Assessed Value × (Total Millage ÷ 1,000) = Annual Tax
The 40% assessment ratio is set by state law. If your county values your home at $400,000, your assessed value is $160,000 regardless of which county you're in.
What varies is the millage rate — the tax rate applied to that assessed value. One mill equals $1 of tax per $1,000 of assessed value. Your total millage is the sum of separate levies from the county government, school district, fire/EMS, and any special districts or cities.
This is where metro Atlanta counties diverge. Total unincorporated millage ranges from about 23 mills in Fayette County to nearly 44 mills in DeKalb — a spread of almost 20 mills.
To normalize the comparison, here's what a $400,000 home costs in every metro Atlanta county using the Georgia tax formula above. These figures are for unincorporated areas, before any homestead exemption.
Sources: Individual county Tax Commissioner websites (2025 adopted rates); Georgia DOR. All figures use assessed value of $160,000 (40% of $400,000). Rates marked with ~ include estimated components for some special districts and school levies.
Notice that this ranking differs from the effective rate table above. DeKalb leads in raw millage (43.59) but ranks second in effective rate (0.96%) because its EHOST program dramatically reduces actual bills for homesteaded residents. Clayton has lower millage (34.15) but the highest effective rate (0.97%) because low home values mean exemptions provide less proportional relief.
Over 10 years, the difference between DeKalb and Fayette on the same $400,000 home is $32,360 before exemptions. Over a 30-year mortgage, it exceeds $96,000.
School district millage is the single largest component of your tax bill in every metro Atlanta county — typically 50% to 65% of the total. Here's the verified component breakdown for major counties.
Source: Gwinnett County Tax Commissioner
Source: Cobb County Tax Commissioner
Source: Cherokee County Finance
Source: DeKalb County Tax Commissioner
Fulton's county millage has held at 8.87 mills for four consecutive years. Total millage varies significantly by location — unincorporated Fulton totals roughly 27 mills, while City of Atlanta residents can see 43–46 mills with Atlanta Public Schools and city levies added.
Source: Fayette News
Fayette has the lowest county millage in the metro (3.763 mills) but a school rate (19.60 mills) comparable to other counties. This demonstrates that school funding decisions — not county government spending — drive most of the variation in total tax burden.
Every number above is for unincorporated areas. If your property is inside a city, you pay an additional layer of city millage that can change the math significantly.
Two homeowners in the same county can have bills that differ by 30% or more depending on which side of a city line they live on.
If you're buying, check the specific tax district for the property — not just the county. The county assessor's website or your real estate agent can confirm exactly which taxing jurisdictions apply to a given address.
Counties with significant commercial and industrial property spread the cost of government across a broader base, keeping residential rates lower. Cobb County, with major employers along the I-75 corridor, has held its general fund rate at 8.46 mills since 2018. Cherokee and Forsyth benefit similarly from growing commercial development along GA-400.
DeKalb's school district levies 22.78 mills — more than 4 mills higher than Cobb's 18.70. That single difference adds $640 per year on a $400,000 home. School millage is set by each county's board of education, not the county commission, so school board elections have a direct impact on tax bills.
DeKalb's 20.81-mill county portion includes six separate levies (general fund, development authority, hospital, fire, police, and sanitation). Most other counties consolidate into two or three levies. Rockdale County's 18.284-mill county rate reflects a similarly layered structure.
Clayton County's high effective rate (0.97%) partly reflects lower home values. The homestead exemption reduces assessed value by a fixed dollar amount — $10,000 in Clayton's case. That same $10,000 exemption provides less proportional relief on a $106,000 assessed value (Clayton's median at 40%) than on a $257,000 assessed value (Forsyth's median at 40%).
Georgia's homestead exemption reduces your assessed value if the property is your primary residence. But the exemption amount varies by county, and some counties offer programs that fundamentally change the math.
Source: Georgia DOR County Property Tax Facts
DeKalb's EHOST (Equalized Homestead Option Sales Tax) provides a 100% credit against the General Fund and Hospital Fund portions of your county tax if you have a homestead exemption. Worth $206.3 million county-wide in 2025, EHOST is the main reason DeKalb's effective rate (0.96%) is so much lower than its raw millage (43.59 mills × 40% = a theoretical 1.74%) would suggest.
Gwinnett's VOE (Value Offset Exemption) freezes the taxable value for the county government portion of your bill at the value when you first received homestead. Even if your home's market value doubles, your county taxes stay based on the original value.
Georgia's HB 581 Floating Homestead, signed in 2025, caps assessment increases at the rate of inflation for homesteaded properties. Most metro Atlanta counties opted in at the county government level. Notable exceptions: Gwinnett and Cobb opted out — but only because both counties already had their own floating homestead exemptions predating HB 581. Clayton County opted out without an alternative program, meaning Clayton homeowners don't receive the inflation cap that most metro residents now have. Fulton County opted in, though Fulton homeowners were already protected by a county-level floating homestead (3% cap or CPI, whichever is lower) that has been in place for 20 years. Nearly all metro Atlanta school districts opted out of HB 581, so the cap applies only to the county government portion of the bill in most cases.
Most metro Atlanta counties held millage rates steady for 2025. A few moved in each direction.
Sources: Individual county government press releases and Board of Commissioners announcements
Looking ahead, DeKalb County's 2026 budget anticipates a 0.5-mill county increase — the first since 2015.
Metro Atlanta's property tax landscape is more varied than most homeowners realize. The county you live in can mean a difference of $1,100 or more per year on the same home — and that gap compounds over every year of ownership.
If you're buying, factor property taxes into your total housing cost. A lower purchase price in a high-rate county may not be the bargain it appears once you account for a decade of higher tax bills.
If you're already a homeowner, your most direct lever is your assessment. You can't change the millage rate, but you can challenge whether your property's assessed value accurately reflects its fair market value. A successful appeal locks in savings for up to three years under Georgia's 299c assessment freeze.
Use AppealAlly's free property tax calculator to check your county's rate against your actual assessment.
Sources: Effective tax rates and median values from 2024 American Community Survey estimates. Millage rates from county Tax Commissioner websites (2025 adopted rates): Gwinnett, Cobb, Cherokee, Fulton, DeKalb, Forsyth, Fayette. State and national benchmarks from Tax Foundation. Georgia property tax formula from Georgia DOR.