Why You Should Review Your Property Tax Bill Every Year

How Appraisal Districts Set Your Property Value

Every county appraisal district in Texas is required by state law to reappraise all real property each year. Because there are millions of parcels statewide, districts use mass appraisal — statistical models that estimate values for large groups of properties at once based on sales data, construction costs, and neighborhood trends.

Mass appraisal is efficient, but it is not precise for every individual home. The models group properties by neighborhood, square footage range, year built, and other characteristics. If your home sits at the edge of a neighborhood boundary, has an unusual floor plan, or has condition issues the district has not inspected, the model may assign a value that does not reflect your specific property.

Why Values Sometimes Overshoot

Appraisal districts have a legal obligation to appraise at market value. In practice, several factors push values upward:

• Sales data lag: Districts calibrate models using sales from the prior year. In a cooling market, last year's sales may overstate current values.
• Broad groupings: A neighborhood with 500 homes might have one model. Homes in worse condition or with fewer upgrades get pulled up by renovated homes that sold at a premium.
• Limited inspections: Districts cannot physically inspect every property every year. They rely on permit records, aerial imagery, and statistical adjustments — which may miss deferred maintenance or functional issues.

The Protest Process Is a Built-In Check

Texas law (Tax Code Chapter 41) gives every property owner the right to protest their appraised value. This is not a loophole — it is a deliberate part of the system. The legislature recognized that mass appraisal cannot be perfect for every property, so it created a formal process for owners to present evidence and request a correction.

The process typically works like this:

1. You receive your Notice of Appraised Value (usually in April or May).
2. You file a protest by the deadline (May 15 or 30 days after the notice, whichever is later).
3. You attend an informal hearing with an appraiser or a formal hearing before the Appraisal Review Board (ARB).
4. You present comparable property data and other evidence supporting a different value.

What to Look for on Your Notice

When your Notice of Appraised Value arrives, check these items:

• Year-over-year change: Compare this year's appraised value to last year's. A large increase is worth investigating with comparable data.
• Square footage and lot size: Verify the district has your living area and lot acreage correct. Errors here directly inflate your value.
• Exemptions: Confirm your homestead exemption (and any other exemptions you qualify for) are listed. A missing homestead exemption can cost hundreds of dollars per year.
• Property description: Check bedroom/bathroom count, year built, and building class. Mistakes happen, especially after remodels or boundary changes.

Small Reductions Compound Over Time

Property taxes are paid every year, so a reduction is not a one-time event. If you achieve a reduction in your appraised value, you potentially pay less in taxes not just this year but in future years as well, since next year's starting point is often based on this year's value.

Because property taxes are annual, a reduction in appraised value affects not just the current year but potentially future years as well, since next year's starting point is often based on this year's value.

The protest process costs nothing to file. Whether you prepare your own evidence, use a document preparation service, or hire a firm, reviewing your appraisal annually is one of the few direct actions you can take to manage your property tax burden.