In Texas property tax law, there are very few hard rules that cannot be appealed, delayed, or negotiated. The protest deadline is one of them. If you own a home in McLennan, Bell, or Williamson County, May 15th is the most important date of the year for your finances.
If you miss this deadline, the appraisal district's proposed value becomes final. You cannot argue it later. You cannot appeal it when your tax bill arrives in October. You simply have to pay it.
How the Deadline is Calculated
Under Texas Tax Code, the deadline to file a Notice of Protest is May 15th, or 30 days after the date the appraisal district mailed your Notice of Appraised Value—whichever is later.
Because most appraisal districts mail their notices in early to mid-April, May 15th serves as the universal deadline for the vast majority of homeowners. If May 15th falls on a weekend, the deadline is extended to the next business day.
What Constitutes "Filing" on Time?
To meet the deadline, you do not need to have your hearing by May 15th. You do not even need to have all your evidence gathered. You simply need to file the official Notice of Protest (Form 50-132) with your county's appraisal district.
Filing can be done in three ways:
- Online: Most counties, including MCAD, BCAD, and WCAD, have an online portal where you can file your protest electronically. This is the fastest and most secure method, as it provides an immediate timestamped receipt.
- By Mail: If you mail your protest form, it must bear a postmark of May 15th or earlier. Do not drop it in a mailbox at 11:00 PM on May 15th and assume it will be postmarked that day. If you are mailing it close to the deadline, take it inside the post office and ask for a hand-stamped postmark.
- In Person: You can physically drop off the form at the appraisal district office before they close on the deadline day. Always ask for a date-stamped copy for your records.
The "I Didn't Get My Notice" Exception
A common question is what happens if the post office loses your Notice of Appraised Value and you never receive it. Texas law does provide a narrow exception for this under §41.411, allowing you to protest the failure to receive notice.
However, this is a difficult case to win. The burden of proof is on you to prove you did not receive it, while the district only has to prove they mailed it to the correct address on file. It is far safer to proactively check your county's CAD website in late April to see your proposed value, rather than waiting on the mail.
File Now, Prepare Later
The most critical takeaway is that you should file your protest even if you are not yet sure how you will argue your case. Filing the Form 50-132 simply reserves your place in line and preserves your legal right to appeal.
Once you have filed, you will typically have several weeks before your informal hearing is scheduled. That is the time to gather your evidence, run your comparable properties, and build your case.
If you are approaching the deadline and need to file quickly, Parity Tax Engine automatically generates a pre-filled Form 50-132 as part of the Basic Math package. You can download it, sign it, and submit it to your county portal in minutes, securing your right to protest before the window closes.