What is the property tax appeal success rate?
What is the property tax appeal success rate?
Among the small share of homeowners who appeal — roughly 3% to 5% — between 30% and 50% win some kind of reduction, according to the National Taxpayers Union; there is no reliable nationwide figure beyond that range, so treat higher "guaranteed success" claims with skepticism.
There is one well-sourced figure for property tax appeal success, and a lot of unsupported numbers floating around. Use the sourced one.
The sanctioned figure. Pete Sepp, president of the National Taxpayers Union, via Bankrate (Oct 31, 2025): "Somewhere between 3% and 5% of homeowners actually file an appeal, and of those, between 30% and 50% win some kind of reduction." Two things stand out: very few homeowners appeal at all, and of those who do, a substantial minority-to-half win some reduction. That asymmetry is the real story — the act of filing, with reasonable evidence, puts you in a small and relatively successful group.
What "success" means here. "Some kind of reduction" is broad — it includes partial reductions, not just full wins. A modest reduction still lowers your taxable value and often carries into future years, compounding the benefit. Success also varies by the type of case: factual record errors (wrong square footage, phantom rooms) and unequal-appraisal arguments tend to win more readily than contested market-value opinions.
Numbers to distrust. You'll see claims like "30–60% of homes are over-assessed" or "40–60% of appeals succeed." These have no published methodology — the "over-assessed" figure is an unsourced expert estimate, and the "40–60% success" range is a recycled secondary citation with no confirmed primary source. Don't rely on them, and be wary of any firm advertising a specific high "success rate" as a guarantee; their sample (cases they chose to take) is not your case.
What actually moves your odds. Your individual probability depends on facts you control, not a national average:
- Whether your assessment genuinely exceeds recent comparable sales.
- Whether your property record contains a factual error.
- Whether near-identical neighbors are assessed lower (unequal appraisal).
- The quality and organization of your evidence.
Bottom line: the only figure to cite is the NTU 30%–50% range for those who appeal. Rather than chase a national success rate, run your own comps and check your record card — that tells you far more about your specific odds than any aggregate statistic.