Georgia homeowners overpay an estimated $633 million annually in property taxes. Here's the math, who pays the most, and why 78% never challenge it.
# The Cost of Over-Assessment: Georgia Homeowners Overpay an Estimated $633 Million a Year
Last Updated: March 2026
Georgia's property tax system collected roughly $18.3 billion in 2024. Buried inside that number is an estimated $633 million that homeowners shouldn't be paying at all. That's money pulled from household budgets because county assessors overvalued their homes, and almost nobody challenged it. To put that in perspective, $633 million could fund about 12,200 Georgia teacher salaries for a year or resurface roughly 1,900 miles of state roads.
The figure isn't hypothetical hand-waving. It comes from applying Realtor.com's 2025 Property Tax Report findings to Georgia's homestead population, and you can see every step of the math in the methodology section below. What makes Georgia's situation particularly acute: the state led the entire nation in property tax burden increases in 2024, with a 15.6% jump in the median homeowner's bill. Meanwhile, only 2.7% of parcels were appealed statewide, and 51% of Georgia homeowners, according to a 2025 homeowner survey, didn't even know they had the right to challenge their assessment.
This article breaks down the $633 million estimate, examines who pays the most, and explains why over-assessment persists largely unchecked.
This estimate uses publicly available data and makes assumptions that are transparent and conservative: Anyone can check the math and adjust the inputs.
This is an estimate, not a measured total. It applies national rates to Georgia's population, which introduces uncertainty. The 40.5% overassessment rate is a national average from Realtor.com, and Georgia-specific data suggests the true number could be higher: A property tax consulting firm's analysis found 49% of Gwinnett County homes and 41% of Fulton County homes overvalued when comparing assessor values to actual MLS sales. (This analysis was conducted by a property tax consulting firm with a financial interest in highlighting overvaluation, though the methodology of comparing assessments to arms-length sales is standard practice.)
If you used Gwinnett's 49% rate instead of the national 40.5%, the total rises to roughly $767 million. If you used a more conservative 35% rate, it drops to about $547 million. The $633 million figure sits in the middle of that range.
$633 million per year. That's the estimated cost of over-assessment to Georgia homeowners, and it's a conservative figure. County-specific data in Gwinnett and Fulton suggests the real number could be higher.
Only 10.4% of Georgia homesteads that are likely overassessed actually filed an appeal in 2020. That leaves roughly $567 million in potential savings on the table every year.
Homestead counts estimated from Census population data (population / 2.5 average household size x 65% homeownership). Overassessment rate uses Realtor.com's 40.5% national figure. Uncaptured savings = unfiled gap x $539 median savings. Appeal data: GA DOR via Hallock Law.
The capture rate varies significantly by county. Fulton's 17.6% rate is the highest of the four largest counties, likely reflecting its longer history of assessment controversies and more established appeal infrastructure. Cobb's 9.8% means roughly 9 out of 10 potentially overassessed homeowners there aren't filing.
Only 10.4% of Georgia homesteads that are likely overassessed filed an appeal in 2020. Nearly $567 million in potential annual savings went unclaimed.
The dollar impact of over-assessment varies dramatically across Georgia's counties, driven by differences in home values, millage rates, and the typical size of FMV reductions on appeal. The table below shows what a successful appeal would save the median homeowner in each of Georgia's 10 largest metro counties.
Savings assume a 10-12% FMV reduction on the median-value home in each county, applied to the county's full effective tax rate (county + school + special district levies). Three-year savings reflect Georgia's 299(c) assessment freeze for successful appellants. Data: GA DOR, SmartAsset, county Board of Assessors records.
DeKalb County illustrates an important wrinkle. Its median home value ($357,800) is lower than Cobb's ($407,200), yet its estimated annual savings ($592) outpaces Cobb's ($507) by 17%. The reason: DeKalb's effective tax rate of 1.75% is the highest among major metro counties, nearly 45% above Cobb's 1.21%. A homeowner in DeKalb pays more per dollar of assessed value, which means an overassessment costs more in absolute terms.
Georgia's median property tax burden rose 15.6% in 2024, the highest increase of any state. The median U.S. property tax bill was $3,500, up 2.8% from 2023. Georgia nearly quintupled that growth rate.
The underlying driver is a decade of extraordinary appreciation. Statewide assessed values have more than doubled since 2013, growing from $348 billion to $705 billion. In just the four years from 2018 to 2022, property tax collections rose 41%.
Source: GA DOR 2025 Property Tax Administration Annual Report. Assessed value = 40% of fair market value per GA law.
That 2022-2023 jump is worth a second look. The $705.2 billion in assessed value implies roughly $1.76 trillion in total fair market value for all Georgia property. The state's total annual property tax haul of $18.3 billion funds about 56% of K-12 education costs. The governor signed an $850 million Homeowner Tax Relief Grant for 2026, the second such one-time grant in three years. That's a direct acknowledgment from the state that the tax burden has grown faster than many homeowners can absorb.
Sources: Realtor.com, Census Bureau QTAX, Tax Foundation, GA DOR
Roughly 49% of Gwinnett County homes and 41% of Fulton County homes are assessed above their actual market value, based on comparisons of assessor data to MLS sales records.
Both metro Atlanta counties exceed the national average.
In Fulton County, the Board of Assessors reported a 5.9% increase in residential home values for the 2025 tax digest, but Georgia MLS data showed actual sale prices rose only 3.7%. That 2.2 percentage point gap means the county's assessments outran the market, and homeowners caught on the wrong side are paying taxes on phantom value.
Gwinnett's aggregate numbers look better. The county assessor reported a 7.9% residential increase, roughly matching the 8% MLS showed overall. But at the individual property level, 49% of homes were still assessed above what they'd actually sell for. Aggregate alignment masks widespread individual-level errors because overvaluations and undervaluations cancel each other out.
The structural problem is timing. Georgia assessors use sales data that's one to two years old. During a rising market, that lag means assessments catch up to (and sometimes overshoot) reality. When the market cools, assessments don't adjust immediately. Several metro Atlanta counties are now showing flat or declining sale prices:
Source: Redfin county-level housing market data
If your county's assessor raised your value 8% based on 2023 sales, and your home would actually sell for 5% less today, the distance between assessment and reality could be 10-13%. On a $400,000 home assessed at 40% of fair market value, that's roughly $400 to $500 per year in excess taxes.
Over-assessment isn't random. Multiple peer-reviewed studies have documented that it follows a pattern: cheaper homes get hit harder than expensive ones, and minority neighborhoods bear a disproportionate burden.
Christopher Berry at the University of Chicago analyzed 26 million residential sales from 2007 to 2017 across 2,600 counties. His central finding: homes in the bottom 10% by value are assessed at roughly twice the effective rate of homes in the top 10%, within the same jurisdiction. A home assessed at 5% of its sale price at the top end might be assessed at 10% at the bottom. The dollar amounts are smaller for cheap homes, but the tax burden as a percentage of the home's actual value is dramatically higher.
Berry estimated the revenue impact at $2.2 billion inappropriately shifted from high-value to low-value properties in Chicago alone, and roughly $1 billion per year in undertaxation of the top 10% of properties in New York City.
Homes in the cheapest 10% are assessed at roughly twice the effective rate of homes in the most expensive 10%, within the same taxing jurisdiction. The property tax is regressive in practice, even when the rate is flat on paper. -- Christopher Berry, University of Chicago (2021)
Avenancio-Leon and Howard's 2022 study in the Quarterly Journal of Economics, "The Assessment Gap," merged data on 118 million homes with geolocation data for 75,000 taxing entities. They found:
The Harvard Journal on Legislation synthesized these findings in February 2025, adding that roughly 60% of total misvaluation stems from measurement error in assessors' models, while the remainder reflects systematic bias that researchers haven't fully explained.
This table consolidates peer-reviewed and institutional research findings on property tax overassessment in the United States. All studies listed are publicly accessible.
The pattern extends to who fights back. In Berry's Cook County analysis, wealthy North Center saw over 60% of homeowners appeal (41.5% won reductions). In lower-income Gage Park, just 5.2% appealed and 2.8% won. The appeal system benefits the people already getting the best deal.
81% of Georgia homeowners have never appealed their property tax assessment, and 51% don't even know they can. A 2025 national homeowner survey (Pollfish, n=2,500) explains why.
Sources: 2025 national homeowner survey (Pollfish, n=2,500), 2025 Georgia homeowner survey (Pollfish, n=863)
The fear that an appeal could raise your assessment is particularly relevant in Georgia, where it's legally possible. Unlike Texas, where the assessment can only go down or stay the same during a protest, Georgia's Board of Equalization has the authority to increase your assessed value. That risk, even though it rarely materializes, is enough to keep 74% of homeowners from trying.
51% of homeowners would go out of their way to claim a $5 reimbursement. But 78% have never appealed a property tax assessment that could save them $539.
The gap isn't about rationality. It's about visibility and friction. Retail refunds are familiar, immediate, and easy. Property tax appeals involve unfamiliar terminology, uncertain outcomes, and government bureaucracy.
Statewide, only 2.7% of Georgia parcels were appealed in 2020. That's 122,174 appeals out of 4.5 million parcels. Metro Atlanta residents were three times more likely to appeal than those in the rest of the state (4.4% vs. 1.5%), and 69% of all appeals came from the 15-county metro area.
Source: Georgia Department of Revenue (2020)
Of those who did appeal, 43.5% settled or withdrew before reaching a hearing. Another 17% failed to appear at their Board of Equalization hearing. The assessor's own estimate is that only 5-10% of residential appeals result in a reduced assessment, though that figure includes the many filings made under the old 299(c) system purely to trigger a value freeze, not to contest the assessment itself.
Commercial property owners in Fulton County filed 31,587 appeals over 12 years with a 62% success rate, securing $652 million in tax reductions -- about $54 million per year. Residential homeowners largely didn't participate. Brian An at the Georgia Tech School of Public Policy documented this gap using Fulton County tax records from 2011 to 2022.
That same study found Atlanta's commercial properties appraised at just 61% of market value -- a 39% average undervaluation -- costing the City of Atlanta, Atlanta Public Schools, and Fulton County an estimated $290 million per year in lost revenue.
Commercial property owners in Fulton County achieved a 62% appeal success rate. Residential homeowners succeed just 5-10% of the time. The system rewards the people who use it.
In New York City, the disparity is even more extreme. A Ryan Consulting executive told the Commercial Observer that "99% of [commercial] owners appeal" because property tax is typically the largest annual operating expense. Commercial owners treat tax appeals as routine; homeowners treat them as extraordinary.
When commercial owners win appeals and residential owners don't, the tax burden doesn't disappear. It shifts. Cook County, Illinois, provides the clearest documented example. During the 2021-2023 reassessment cycle, businesses landed $25.5 billion in valuation reductions through appeals, leading to $3.26 billion less on their tax bills. Homeowners had $1.9 billion added to their bills as a result.
Residential properties went from 68% to 71% of total assessed value in Cook County's south and west suburbs after the Board of Review processed commercial appeals. The total tax levy stayed the same; the burden just moved.
Source: Cook County Assessor's Office, Cook County Treasurer Pappas Report
Georgia doesn't publish equivalent data, but the Georgia Tech study's finding that Fulton County commercial properties are assessed at 61% of market value while residential assessments frequently exceed market value suggests a similar dynamic is playing out here.
The table below converts the estimated annual overpayment into more tangible terms.
The per-homeowner number matters most. Over a three-year assessment freeze (if they win an appeal), $539 per year becomes $1,617 in cumulative savings. Across Georgia's roughly 1.17 million overassessed homesteads, almost none of those savings are being captured.
Georgia's $633 million in estimated annual overpayment is roughly 74% of the $850 million Homeowner Tax Relief Grant the state just signed into law. The difference: the HTRG is a one-time grant. Over-assessment happens every year.
For the full HTRG funding history and how HB 581's assessment cap intersects with this relief, see HB 581 and Georgia Property Tax Appeals.
Texans protested 12.2% of all parcels in 2022 and saved $6.6 billion. Georgia's 2.7% appeal rate generates almost none of that potential savings.
Texas provides the starkest contrast. Texans protested 12.2% of all parcels in 2022, compared to Georgia's 2.7%. Texas protests carry zero risk of an increase, the state has a 10% annual homestead cap, and a thriving protest industry makes filing frictionless. Georgia has none of those advantages.
Sources: Texas Comptroller, Cook County BOR, Georgia Department of Revenue, NJ Div. of Taxation
Georgia homeowners are overpaying an estimated $633 million per year on property taxes, and nearly all of it goes uncollected because the people losing money don't know they can fight it, don't know how, or worry it'll backfire.
The data behind that estimate isn't controversial. Realtor.com's 2025 analysis found that 40.5% of US properties are overassessed, with $539 in median annual savings for affected homeowners. County-specific data in Gwinnett (49%) and Fulton (41%) suggest Georgia's overassessment rate may actually exceed the national average. Peer-reviewed research from the University of Chicago, the Quarterly Journal of Economics, and the Federal Reserve confirms that the burden falls hardest on lower-value homes and minority neighborhoods.
The behavioral gap is just as real. Only 2.7% of Georgia parcels get appealed. Eighty-one percent of Georgia homeowners have never tried. Half don't know they can. Meanwhile, commercial property owners appeal routinely, win 62% of the time in Fulton County, and benefit from $652 million in cumulative reductions.
The appeal gap puts the cost of inaction in focus: just 10.4% of potentially overassessed homesteads filed appeals in 2020, leaving roughly $567 million in annual savings unclaimed. For the median overassessed homeowner, a successful appeal and three-year freeze could mean $1,617 back in their pocket.
Every year that homeowners don't act, the assessment that's too high becomes the baseline for next year's assessment that's even higher. In a state where assessed values doubled over the past decade and the tax burden jumped 15.6% in a single year, the cost of doing nothing compounds.
The $633 million estimate uses a straightforward multiplication: estimated overassessed homesteads (1,174,500) multiplied by median potential savings ($539). The overassessed count comes from applying the national 40.5% rate to Georgia's estimated 2.9 million homesteads (65% of 4.5 million total parcels). The homestead percentage is an estimate based on GA DOR reporting that approximately 65% of Georgia homes carry homestead exemptions.
The per-household savings table uses the median home value and effective tax rate for each county from GA DOR and SmartAsset data, combined with typical FMV reduction percentages (10-12%) from our analysis of appeal outcomes. Three-year savings assume the reduced value is frozen under Georgia's O.C.G.A. 48-5-299(c) provision. Homestead counts for the appeal gap table are estimated from Census population data using average household size and homeownership rates, not county-level homestead exemption counts, which aren't published at the granularity needed.
This approach has limitations. It applies a national overassessment rate to Georgia rather than Georgia-specific data (which doesn't exist statewide). It uses median savings rather than mean, which likely understates the total. And it doesn't account for differences in home values, millage rates, or exemption structures across Georgia's 159 counties. The ITEP data (2018) is older than ideal but represents the most recent available edition of that study. The estimate is a reasonable approximation, not a precise measurement.
All data in this article was last verified in March 2026.