Georgia assessors report a 5–10% property tax appeal success rate, but data from 748,421 appeals tells a different story. Nearly 43.5% settle before a hearing, and 17% of filers never show up. Prepared homeowners with strong comps see far better odds.
The answer depends on which group you're in.
We analyzed 20,229 property tax appeals filed in Gwinnett County during the 2025 tax year, every single residential appeal on record obtained through a public records request. Of the 17,325 that reached a final resolution, 82.2% received a reduction in assessed value. The median successful appeal knocked $15,600 off the home's fair market value, and 99.2% of winners locked in that lower assessment for three full years under Georgia's assessment freeze law.
That 82.2% number is far higher than the oft-cited 5 to 10% residential success rate reported by Georgia county assessors. The discrepancy is not a mystery. The assessor-reported figure measures only reductions granted at Board of Equalization hearings, and it includes the 17% of appellants who never show up (an automatic loss) and the large share who file without any supporting evidence. It excludes the 43.5% of appeals that settle before reaching a hearing, many of which result in reduced assessments.
Nationally, the International Association of Assessing Officers (IAAO) estimates appeal success rates between 40% and 60%. The National Taxpayers Union puts the range at 30% to 50% for homeowners who actually file. Georgia's data falls squarely in line once you account for the full resolution picture rather than just the hearing-stage snapshot.
The statewide numbers are substantial. Georgia homeowners filed 748,421 property tax appeals between 2015 and 2020, according to Georgia Department of Revenue data. In 2020 alone, 122,174 appeals were filed, covering 2.7% of all parcels statewide (roughly 1 in 37 properties). Appeal volumes have grown 8.3% year over year, driven by rapidly rising assessments across Metro Atlanta.
Despite those numbers, the vast majority of Georgia homeowners have never appealed. A 2025 national homeowner survey of 2,500 respondents found that 57% of Georgia homeowners do not even know they have the right to appeal, while 52% believe their property is overvalued for tax purposes. That gap between awareness and action represents tens of thousands of homeowners who may be overpaying.
Georgia's property tax appeal landscape is dominated by four Metro Atlanta counties. Fulton, DeKalb, Gwinnett, and Cobb together account for 43.4% of all appeals filed statewide and 61.3% of total appeal value (GA DOR data, 2015 to 2020).
Metro Atlanta homeowners are 3 times more likely to appeal than those in the rest of Georgia: 4.4% of metro parcels versus 1.5% non-metro (GA DOR data, 2015 to 2020). That pattern correlates with faster home price appreciation in Metro Atlanta and greater access to appeal resources.
Appeal volumes fluctuate dramatically year to year. Gwinnett County saw a 151% spike in 2022 appeals, and Fulton County exceeded 30,000 appeals in 2023. These surges track with pandemic-era assessment increases of 15% to 25% annually.
Higher-value properties are disproportionately represented in the appeal pool. The average value of appealed parcels statewide was $805,800, and Metro Atlanta's average was even higher at $897,500 (GA DOR data, 2015 to 2020). Cobb County's appeal value share (10.9% of statewide) is notably high relative to its volume share (6.5%), indicating that higher-value properties dominate its appeal filings.
No Georgia county publishes annual win/loss rates for residential BOE hearings, which is precisely why the Gwinnett County dataset we obtained through public records is so valuable. It is the most granular residential appeal outcome data available anywhere in Georgia.
The headline success rate is a blended average that mixes very different groups of people. When you separate them, the picture changes dramatically.
In the Gwinnett County data (2025 tax year), 63% of all appeals were resolved at the Assessor level, where the county's own staff reviews your appeal and adjusts the value before it ever reaches a hearing. The success rate at that stage was 97.6%. Most homeowners who file a reasonable appeal never set foot in a hearing room because the county agrees to lower the value on its own.
Of appeals that did proceed to the Board of Equalization, the win rate was 33.3%, with a median reduction of $19,400 among winners. Settlement conferences showed a 56.6% win rate with a notably higher median reduction of $41,800.
Why does this matter? Because the "5 to 10%" figure people cite online reflects only the BOE hearing stage, after the assessor has already resolved most meritorious appeals. It excludes the 97.6% success rate at the assessor level and the 43.5% of statewide appeals that settle pre-hearing.
The commercial property comparison makes the pattern even clearer. A Georgia Tech study of 31,587 commercial appeals in Fulton County (2011 to 2022) found a 62% success rate. Commercial property owners win at that rate because they prepare systematically with professional appraisers and tax attorneys. The system rewards preparation regardless of property type.
Evidence quality is the single biggest factor. The Gwinnett County data makes this concrete.
Of the roughly 7,400 appeals with analyzable filing data, 80% were submitted without any attached supporting evidence on the PT-311A form. Among the 1,471 that did include documentation, even basic evidence improved average outcomes by 34%.
The most effective evidence types are the ones homeowners use least. Assessment error arguments, where you identify factual mistakes in the county's records like wrong square footage, incorrect bedroom count, or nonexistent features, produced an average reduction of 17.1%. That is more than double the 6.8% baseline. But only 1.4% of appellants used this approach.
Characteristic differences arguments, explaining how your home's specific features compare unfavorably to the county's comparable properties, achieved a 12.9% average reduction. Sales comps are the most common evidence type at 28.8%, but they only produce an 18% improvement over baseline.
Appeal letters that make a structured, written case appeared in only 6.7% of all filings but showed up in 26.1% of high-value wins (those achieving over 30% reductions or more than $5,000 in tax savings). Formal letters were nearly four times more common among top-performing appeals.
Document quality matters too. Complete appeal packets (a structured letter, supporting comps, and organized documentation) achieved an 11.2% average reduction in Gwinnett County, compared to 7.3% for freeform submissions. You do not need professional formatting, but moving from a casual, unstructured filing to one with a clear written argument and supporting data can close more than half that gap.
The takeaway: before pulling comparable sales, check your property record card for errors. Wrong square footage, missing depreciation, incorrect lot size. These mistakes are easy to prove and hard for assessors to defend.
Professional appeal services commonly report success rates of 77% to 86%. But those numbers come with a significant caveat. Professionals pre-screen cases and decline those unlikely to succeed, which inflates their reported rates.
The Gwinnett County data (2025 tax year) tells a more nuanced story. About 48.3% of appeals were filed by homeowners themselves, and 51.7% used professional preparers. Here is how each group performed:
Tax firms, the most common type of professional preparer, achieved the same 7.8% average reduction as DIY homeowners. The advantage comes from argument strategy, not simply having representation. Attorneys achieved 12.8% because they are more likely to identify assessment errors and characteristic differences, the two highest-impact evidence types.
For standard residential appeals where you have strong comparable sales, a well-prepared DIY approach can match professional results. Professional help makes the most sense for complex cases (atypical properties, mixed-use), high-value homes, or if you plan to escalate to Superior Court.
The honest assessment: you do not need to pay someone to file a successful appeal. You need the right evidence and the right argument. That is something most homeowners can do on their own with proper guidance. If you decide to hire help, focus on what the professional will actually do differently, not just whether they will file on your behalf.
Georgia's appeal system has several paths, and the one you choose matters. Here is how they break down based on statewide data (GA DOR data, 2015 to 2020):
Board of Equalization (94.4% of hearings): Free, no filing fee. A three-member citizen panel hears your case. You present comparable sales, property card errors, or other evidence. The panel can lower your value or leave it unchanged. If you disagree with the result, you can appeal to Superior Court for a $25 filing fee. This is the right choice for nearly all homeowners.
Hearing Officer (5.2% of hearings): A certified appraiser hears your case instead of a citizen panel. Available for non-homestead properties or properties valued over $500,000. Most residential homeowners do not qualify.
Arbitration (0.4% of hearings): An all-or-nothing format. The arbitrator must choose either the assessor's value or your value, with no compromise. Requires a certified appraisal upfront ($300 to $500), and if you lose, you pay the arbitrator's fee. The decision is binding and cannot be appealed. Only 8.7% of arbitration cases in Gwinnett County resulted in a win.
Superior Court (3.5% of hearing-stage appeals): Available after BOE or Hearing Officer decisions. Filing fee is just $25. This is the judicial review option for cases where you believe the BOE made an error.
One important protection applies regardless of which path you choose: Georgia law (O.C.G.A. 48-5-311(e)(9)) explicitly prohibits any deciding body from raising your assessed value above the county assessor's original figure. The worst possible outcome from filing an appeal is no change. In Gwinnett County, only 56 out of 17,325 closed appeals (0.3%) saw any increase, and those involved special circumstances like active prior freezes. Additionally, the burden of proof falls on the assessor, not the homeowner. When the county changes your returned value, they must prove the change is valid.
The Gwinnett County data confirms the BOE path works. Of appeals resolved at the assessor level (63% of all filings), 97.6% received a reduction. The BOE itself showed a 33.3% win rate, which reflects the fact that by the time a case reaches the BOE, the assessor has already conceded most of the clear-cut cases.
Georgia's assessment freeze under O.C.G.A. 48-5-299(c) is one of the most powerful benefits of a successful appeal. When you win a reduction, the county cannot increase your assessed value for the next two years. Combined with the appeal year, that creates a three-year value lock at your reduced amount.
Before HB 581 took effect on January 1, 2025, the freeze worked differently. Simply filing an appeal and attending your BOE hearing triggered the freeze, even if you lost and received no reduction. Thousands of homeowners filed with minimal evidence just to prevent future increases, a strategy that was rational under the old rules.
HB 581 changed the calculus. Starting with the 2025 tax year, you must win an actual value reduction to trigger the three-year freeze. Filing without evidence is no longer a free hedge against future increases. This means evidence quality is now the critical factor, not just the act of filing.
The Gwinnett County data confirms the freeze is essentially automatic for winners. Of 14,235 successful appeals, 14,119 (99.2%) received the three-year freeze. Only 114 winners (0.8%) had the reduction applied to the current year only.
Separately, Georgia voters approved Amendment 1 in November 2024 with 63% support, creating a statewide floating homestead exemption that caps assessment increases at the inflation rate. This provides a baseline of protection, but it does not replace the value of appealing an already-inflated assessment. The cap uses your 2024 assessed value as the baseline, so if your 2024 value was too high, the cap locks in that overassessment. An appeal is the only way to correct it.
Georgia taxes property at 40% of fair market value (FMV), not the full amount. Here is how the math works for a typical successful appeal:
Worked example: $450,000 home with a $50,000 FMV reduction
The Gwinnett County data (2025 tax year) shows what real homeowners actually received:
Two patterns stand out. First, win rates climb with home value, from 78.4% for homes under $300,000 to 85.9% for homes over $1 million. Second, the median reduction percentage stays remarkably consistent at 3.0% to 3.3% across every tier. Higher-value homes get larger dollar reductions simply because the underlying values are larger.
The overall median reduction was $15,600, translating to roughly $218 in annual tax savings at Gwinnett County's combined millage rate, or about $653 over three years with the assessment freeze.
The time investment is modest. The median Gwinnett County appeal took 71 days from filing to resolution (about 2.5 months), and the BOE hearing itself typically runs 15 to 30 minutes. Most homeowners spend 3 to 6 hours total on research, filing, and preparation. Filing a BOE appeal costs $0.
It depends on how you measure it. Of 17,325 closed appeals in Gwinnett County (2025 tax year), 82.2% received a reduction. Statewide, 43.5% of appeals settle before a hearing, often with reduced assessments. The commonly cited 5 to 10% figure only reflects BOE hearing outcomes and includes no-shows and evidence-free filings. For homeowners who prepare with comparable sales evidence, outcomes are significantly better.
No. Georgia law (O.C.G.A. 48-5-311(e)(9)) explicitly prohibits any deciding body from raising your assessed value above the county assessor's original figure. The worst possible outcome is no change. In Gwinnett County, only 56 out of 17,325 closed appeals (0.3%) saw any value increase, and those were cases involving special circumstances like active prior freezes.
For most overassessed homeowners, yes. Filing a BOE appeal is free, your value cannot go up as a result, and the Gwinnett County data shows an 82.2% success rate. Even the median reduction of $15,600 translates to roughly $653 in savings over three years with the assessment freeze. The key question is whether you have evidence, specifically comparable sales or property record errors, showing your assessed value exceeds fair market value.
The strongest evidence includes 3 to 5 comparable sales from your neighborhood, sold within 6 to 12 months of the January 1 valuation date, with similar square footage (within 10% to 15%). Documented property record card errors (wrong square footage, incorrect bedroom count, nonexistent features) are even more effective, producing an average 17.1% reduction in Gwinnett County versus 8.0% for sales comps alone. Check your property card first.
In Gwinnett County, the median appeal took 71 days from filing to resolution (about 2.5 months). The fastest 25% resolved in under 55 days. If your appeal escalates past the assessor level to a BOE hearing, expect closer to 4 months. You have exactly 45 days from your assessment notice mailing date to file, and that deadline is strictly enforced with no extensions.
Under O.C.G.A. 48-5-299(c), when you win a property tax appeal and receive a reduced value, the county cannot increase that value for the next two years. Combined with the appeal year, this creates a three-year value lock. Starting in 2025 under HB 581, you must win an actual reduction to trigger the freeze. Previously, just attending a hearing was enough.
No. In Gwinnett County, DIY homeowners achieved the same average reduction (7.8%) as tax firms. Attorneys did outperform at 12.8%, but their advantage came from argument strategy (identifying assessment errors and characteristic differences), not from the fact of representation itself. For standard residential appeals with good comparable sales, a well-prepared DIY approach works. Consider an attorney for complex cases, high-value properties, or Superior Court escalation.
You forfeit all appeal rights for the entire tax year. The 45-day window starts from the postmark date on your assessment notice, and Georgia enforces it strictly with no exceptions. Assessment notices typically mail in late May through June, putting deadlines in July through August. If you are unsure of your deadline, contact your county assessor's office immediately. Filing early preserves your rights and gives you maximum preparation time.
The data from 20,229 Gwinnett County appeals and 748,421 statewide filings points to the same conclusion. Success rates are not fixed. They are a function of preparation.
Homeowners who check their property record for errors, gather 3 to 5 comparable sales, and present a structured case win at rates far above the headline averages. Homeowners who file without evidence or skip their hearing pull those averages down.
With Georgia's HB 581 now requiring an actual reduction to trigger the three-year freeze, the quality of your evidence matters more than ever. The good news: building that evidence is something most homeowners can do in a few hours, and filing a BOE appeal costs nothing.
:::cta Your odds depend on your evidence
The data is clear: homeowners who bring comparable sales and identify assessment errors win at significantly higher rates. Start with your address to see what evidence is available for your property.