In Texas, the property tax system operates on a strict calendar. While the appraisal district has months to determine the value of your home, you have a very narrow window to challenge their assessment. For the 2026 tax year, the Texas property tax appeal deadline is May 15.
Understanding this deadline, and the exceptions to it, is the first step in protecting yourself from an unfair tax burden.
The May 15 Rule
Under Texas law, the deadline to file a Notice of Protest is May 15, or 30 days after the appraisal district mailed your Notice of Appraised Value—whichever date is later.
Because most appraisal districts mail their notices in early to mid-April, May 15 serves as the hard deadline for the vast majority of homeowners. If your notice was mailed late (for example, on May 1), your deadline would be pushed back 30 days from that mailing date. However, you should never assume your deadline is extended without verifying the exact mailing date on your notice.
What Happens If You Miss the Deadline?
The consequences of missing the property tax appeal deadline are severe. If you do not file your protest by the deadline, you lose your right to appeal your property value for the entire year.
The value set by the appraisal district becomes final, and your property taxes for the year will be calculated based on that number. There are very few exceptions to this rule, and they generally require proving that the appraisal district failed to deliver the notice entirely, which is difficult to establish.
How to File Your Protest Before the Deadline
Filing your protest is a simple process that secures your right to a hearing. You do not need to have all your evidence prepared on the day you file. You simply need to submit the Notice of Protest (Form 50-132) to your county appraisal district.
The most efficient way to file is through your county's online portal. For example, homeowners in Central Texas can file directly at:
- McLennan County Appraisal District (MCAD)
- Bell County Appraisal District (BCAD)
- Williamson County Appraisal District (WCAD)
- Travis Central Appraisal District (TCAD)
When filing, ensure you check the boxes for both "Value is over market value" and "Value is unequal compared with other properties." This preserves your right to argue both points during your hearing.
Why You Should Not Wait Until May 14
While you have until May 15 to file, waiting until the last minute is a strategic mistake. Appraisal district websites frequently experience heavy traffic and technical issues in the days leading up to the deadline. If the portal crashes on May 15, you may be forced to deliver a physical copy to the appraisal district office before they close.
Furthermore, filing early often means your informal hearing will be scheduled earlier in the season. Appraisers are generally more amenable to settlements early in the process, before they suffer from "protest fatigue" after weeks of contentious hearings.
Prepare Your Evidence Now
Filing the protest is just the first step. To actually win a reduction, you need evidence. Once you have filed, you should immediately begin gathering comparable sales data and building your Equal and Uniform analysis.
If you want to skip the manual research, Parity Tax Engine can generate a complete, hearing-ready evidence packet in minutes, utilizing the same statutory adjustment grids the appraisal districts use.
Do not let the May 15 deadline pass you by. File your protest today, and take control of your property taxes.