Data Study · 14 Texas counties · June 2026
More than 1,000,060 Texas homes are assessed above comparable homes nearby.
We ran 4,836,570 homes across 14 Texas counties through the same unequal-appraisal comparison their appraisal review boards use. An estimated $1.5 billion a year is overpaid because these homes sit above what comparable homes on their own block are assessed at.
County by county
| County (metro) | Over-assessed | % of homes | Overpaid/yr |
|---|---|---|---|
| Harris (Houston) | 218,368 | 20.2% | $368.6M |
| Dallas (Dallas) | 142,461 | 23.1% | $248.1M |
| Bexar (San Antonio) | 132,466 | 23.6% | $107.8M |
| Tarrant (Fort Worth) | 124,393 | 21.4% | $164.1M |
| Travis (Austin) | 62,948 | 18.4% | $171.1M |
| Collin (Plano / McKinney) | 62,181 | 17.5% | $130.3M |
| El Paso (El Paso) | 55,135 | 26.2% | $49M |
| Fort Bend (Sugar Land) | 49,974 | 17.7% | $79.7M |
| Denton (Denton / Frisco) | 49,299 | 17.5% | $62.7M |
| Williamson (Round Rock) | 30,059 | 13.2% | $63.4M |
| Nueces (Corpus Christi) | 28,855 | 26.6% | $31.2M |
| Jefferson (Beaumont) | 19,202 | 31.7% | $10.1M |
| Bell (Killeen / Temple) | 18,645 | 17.8% | $17.2M |
| Johnson (Cleburne / Burleson) | 6,074 | 30.1% | $6.7M |
Worst ZIP codes in San Antonio (Bexar): 78202 (43%), 78207 (41%), 78210 (39%), 78201 (38%), 78204 (38%). Full per-metro ZIP detail on the Texas leaderboard.
Looking beyond Texas? See the nationwide Most Overtaxed ZIP Codes in America study, ranking ZIPs across Texas, New York, New Jersey, Colorado and Florida, and our Florida study, Florida's $994 Billion Assessment Cap Gap, built from 8.29 million parcels on the 2025 Final roll.
Methodology
We analyzed every residential property in 14 Texas counties using each county's 2026 public appraisal records, at true market value. For each home we found comparable homes in the same appraisal neighborhood, within 25% of its living area and 10 years of its build year (excluding mobile homes and tear-downs from the comparison), then compared its assessed value to the average of its closest comparables. A home is counted as over-assessed when its assessed value sits more than 5% above that comparable average, the same unequal-appraisal standard Texas appraisal review boards apply under Texas Tax Code 41.43(b)(3). Annual overpayment applies each county's effective tax rate to the assessed gap.
Full detail on comp selection, ZIP aggregates, and data sources is on our methodology page.
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