A Texas property tax protest can be easier to manage when you treat it as a documented valuation review rather than a general complaint about a rising tax bill. This guide explains how to read your appraisal notice, estimate the potential effect of a lower taxable value, gather useful evidence, file with your county appraisal district, and prepare for an informal review or Appraisal Review Board hearing. Because deadlines, forms, online portals, and procedures can change, confirm the details with your county appraisal district each year.
Overview
In Texas, the county appraisal district, commonly called the CAD, determines the appraised value of property for property-tax purposes. Local taxing units, such as a county, city, school district, or special district, set tax rates and use the appraised or taxable value when calculating their portions of the bill. A protest challenges the appraisal district's valuation or certain property information; it does not directly challenge a taxing unit's budget or tax rate.
Start by locating your appraisal notice or checking your property record through the CAD's official website. Compare the current value with the previous year's value, review the property's description, and note the deadline printed on the notice. Texas law provides a standard protest deadline, but the applicable date can depend on when the notice was delivered and other circumstances. Use the notice and your CAD's current instructions as the controlling reference.
A successful protest may reduce the appraised value, correct the property's characteristics, or establish an agreed value through an informal process. It does not guarantee that the total tax bill will fall by the same percentage, because the final bill also depends on exemptions, taxable value limits, tax rates, and the decisions of multiple taxing units.
How to estimate
Before assembling documents, create a simple estimate of what a valuation change could mean. The basic calculation is:
Estimated annual tax difference = proposed value reduction ÷ 100 × combined tax rate
For example, if you believe the value should be reduced by $40,000 and the combined rate used for your property is 2.00%, the rough gross difference would be $800 per year: $40,000 ÷ 100 × 2.00. This is an illustration, not a prediction of a particular property's bill.
For a more useful estimate, begin with the value shown on your notice, subtract any value reduction you can reasonably support, and then review the CAD's information about exemptions and taxable value. If you have a homestead exemption or another exemption, do not assume the same percentage applies to every part of the calculation. A tax estimate is a planning tool; the official bill controls.
Keep two separate questions in mind:
- Is the appraised value accurate? This is the central issue in a valuation protest.
- What will the final bill be? This also depends on exemptions, tax rates, and taxing jurisdictions.
Inputs and assumptions
Strong protests usually combine specific evidence with a clear explanation. Gather the following inputs before filing:
- Appraisal notice: Save the notice, proposed value, property account number, and stated protest instructions.
- Property record: Check the reported living area, lot size, year built, construction type, bathrooms, garage, additions, and other features. An incorrect characteristic can affect the comparison.
- Comparable sales: Look for nearby properties that are similar in size, age, condition, location, and use. Sales from the relevant valuation period are generally more useful than distant or poorly matched examples.
- Condition evidence: Take dated photographs and collect repair estimates, contractor statements, inspection reports, or insurance documentation showing defects that a standard record may not capture.
- Prior records: Keep previous appraisal notices, prior protest results, and correspondence. A past value is not automatically the correct current value, but it can help you track changes and identify questions.
- Calculation notes: Record the value you believe is supported, how you reached it, and which documents support each adjustment.
Evidence should be relevant rather than voluminous. A short packet with labeled photographs, a repair summary, and a few well-matched comparable sales is easier to review than an unorganized collection of documents. Do not rely on a single online estimate without explaining why the property is comparable.
Evidence comparison
| Evidence | Best use | What to include | Limit |
|---|---|---|---|
| Nearby sales | Arguing that market value is lower than the proposed appraisal | Address or account reference, sale date, price, size, age, and meaningful differences | A sale is weaker when the property is far away, substantially different, or from the wrong period |
| Repair estimates | Documenting deferred maintenance or substantial defects | Written scope, estimated cost, date, and photographs | Repair cost does not always equal a dollar-for-dollar value reduction |
| Photographs | Showing visible condition, damage, or unfinished work | Dated images with captions and room or exterior location | Photos should be tied to a specific valuation argument |
| Incorrect property details | Correcting the CAD record | Identify the inaccurate field and provide a document or image supporting the correction | A corrected detail may change value, but the amount is not automatic |
Filing and preparing for review
Use the current protest form or online filing system identified by your county appraisal district. Enter the property account information carefully, select every applicable basis for protest, and keep a copy of what you submit. Upload supporting evidence if the portal allows it, and note any confirmation number.
Many CADs offer an informal review before a formal Appraisal Review Board hearing. Treat the informal review as a focused opportunity to explain the error and present your evidence. Prepare a one-page summary stating: the proposed value, the value you are requesting, the reason for the request, and the documents that support it.
If the matter proceeds to an ARB hearing, read the hearing notice closely. It should explain the date, time, location or remote format, evidence submission instructions, and any deadlines. Organize your presentation in the same order as your written protest. Be precise and respectful: identify the disputed fact, show the supporting evidence, and explain the requested correction. If you cannot attend, ask the CAD about available rescheduling or written-evidence procedures rather than assuming an absence will be excused.
For Spanish-speaking property owners, ask whether the CAD provides interpretation or translated materials. Key terms include:
- Appraisal district: distrito de tasación o distrito de valoración
- Property appraisal notice: aviso de valor de la propiedad
- Protest: protesta o impugnación
- Appraised value: valor tasado o valor de tasación
- Taxable value: valor imponible
- Homestead exemption: exención de vivienda principal
- Informal review: revisión informal
- Appraisal Review Board: Junta de Revisión de Tasaciones
Worked examples
Example one: incorrect information. The notice lists a garage addition that the property does not have. The owner photographs the exterior, marks the incorrect line on the property record, and submits a concise explanation. The requested correction is the removal of the inaccurate feature. The CAD determines whether that correction changes the value.
Example two: condition and comparable sales. The notice proposes a value that the owner believes exceeds the value of similar nearby homes. The owner assembles three reasonably comparable sales, explains differences in size and condition, and adds photographs and estimates for a significant roof problem. The requested value is supported by the sales discussion, while the repair documents explain why the subject property should not be treated as fully comparable to renovated homes.
Example three: estimating the financial effect. A homeowner believes a $25,000 reduction is supportable. Using an illustrative combined rate of 2.00%, the rough gross estimate is $500 per year. The homeowner then checks exemptions and current taxing-unit rates before treating the estimate as a budgeting figure.
When to recalculate
Revisit this process every year after the new appraisal notice arrives, even if the property has not changed. Recalculate when the proposed value, exemption status, property record, or local tax rates change. Also update your evidence when new nearby sales become available or when repairs, storm damage, remodeling, or other material conditions affect the property.
Before each filing season, verify the CAD's official protest deadline, form, online portal, evidence-upload rules, informal-review process, and ARB hearing instructions. Do not copy last year's dates or assume another county follows the same procedure. Save the notice, submission confirmation, evidence packet, and final decision together for future reference.
For broader homeowner information, see Texas Homestead Protections Explained. The practical next step is simple: find your current notice, check the property record line by line, write down your requested value, and build an evidence packet around the strongest factual error or valuation comparison you can document.
