A Texas homeowner can do everything else right — gather the comparable sales, photograph the cracked driveway, line up a sharp argument about why the appraisal is too high — and still lose the whole protest by missing one date. The deadline is the part of the property-tax system that forgives nothing. Get it wrong and the appraisal district does not have to hear a word you have to say that year.
This piece is about that single date: when it falls, the one exception that can extend it, and the practical steps to make sure your protest is on file before the clock runs out. It is short on purpose, because the deadline is the thing most likely to cost you money, and it is the easiest thing to get right once you understand how it works.
The rule: May 15, or 30 days after your notice
Under the Texas Property Tax Code, your written protest is due by May 15, or 30 days after the appraisal district delivered your Notice of Appraised Value, whichever is later. The Texas Comptroller’s property-tax protest page states the deadline plainly, and it is the same statewide — Harris, Dallas, Tarrant, Bexar, Travis, and every smaller county follow the same code.
Two phrases in that rule matter. “Delivered” refers to the mailing date the district uses, not the day you happened to open the envelope. And “whichever is later” is the part that occasionally helps you: if your notice goes out late and you do not receive it until, say, late April, your 30-day window can push your personal deadline past May 15. The controlling date for your specific property is printed on the notice itself. Read it, and write it on the calendar.
If the deadline lands on a weekend or holiday
When May 15 — or your 30-day date — falls on a Saturday, Sunday, or legal holiday, Texas law rolls the deadline to the next regular business day. That is a small grace, not a planning strategy. Treat the printed date as firm and file early; relying on the weekend rollover is how people end up scrambling at a closed office.
How to actually file before the clock runs out
You file a Notice of Protest, which is a one-page form. There are three reliable ways to get it in on time:
- Online. Most large Texas appraisal districts run an online protest portal, and the timestamp settles any dispute about whether you filed on time. This is the safest route in the final days before the deadline.
- By mail. Use Comptroller Form 50-132. Under Texas law a mailed protest is generally considered timely if it is postmarked on or before the deadline — but a postmark can be delayed, so do not mail it on the last afternoon.
- In person or drop box. Many districts accept hand-delivered protests and have after-hours drop boxes. Keep a copy with the date.
Whichever method you choose, keep proof: a confirmation number, a certified-mail receipt, or a stamped copy. If a dispute ever arises about timeliness, that proof is your evidence.
You do not have to file the protest yourself. Texas law lets you designate someone else, a family member, attorney, or a property tax consultant, to act as your agent using Comptroller Form 50-162. This is common for homeowners who travel for work, own property in a county far from where they live, or simply want a professional handling the deadline and the hearing. The same May 15 (or 30-day) rule still applies to an agent-filed protest, so authorizing someone early, rather than scrambling in the final week, is worth doing if you plan to use one.
What happens if you miss it anyway
Missing the deadline generally forfeits your right to protest the appraised value for that year. There are narrow exceptions in the Texas Property Tax Code — for example, certain late protests tied to a substantial error or a failure to send proper notice — and the Comptroller describes some taxpayer remedies in its “Property Taxpayer Remedies” guide. But these are not a reliable fallback. They are hard to invoke, fact-specific, and not something to count on. The practical reality is simple: if you want a protest heard, file on time.
Why the late-notice rule is your friend
The “whichever is later” half of the deadline rule exists because appraisal districts in fast-growing Texas counties do not all mail notices at the same time. A district handling hundreds of thousands of parcels may stagger its mailings over several weeks. If your notice goes out in late April or early May, your 30-day clock can legitimately run past May 15, giving you more time than a neighbor whose notice arrived in March. Do not assume your deadline matches anyone else’s — it is tied to the delivery date of your notice. This is also why the date printed on the notice is the only one that governs your property. The Comptroller’s protest page lays out the framework, but the specific date is set parcel by parcel.
What counts as a valid, on-time protest
A protest is more than a phone call complaining about your value. To be valid under the Texas Property Tax Code, the written protest must identify the property owner, identify the property being protested, and state at least one reason for dissatisfaction — most commonly that the value exceeds market value or is unequal compared with similar properties. The Notice of Protest form (50-132) walks you through each required element, which is why using the form, rather than an informal letter, is the safer choice. An incomplete protest filed on time can still create problems, so fill out every applicable box.
Don’t wait for the “right” evidence
A common and expensive mistake is holding off on filing because you have not finished gathering comparable sales or repair estimates. Do not. The deadline is to file the protest, not to submit your evidence. Once your Notice of Protest is on record, you have until the informal meeting or the formal Appraisal Review Board hearing — typically weeks later — to assemble your case. File first, build the argument second.
Put the date on the calendar now
When the Notice of Appraised Value arrives this spring, do two things before you set it down: find the protest deadline printed on it, and enter that date in your phone with a reminder a week ahead. Everything else about a property-tax protest can be fixed, delegated, or improved later. The deadline cannot. The Texas Comptroller and your county appraisal district both publish the current year’s calendar online, so there is no excuse to be surprised. In a state with no income tax and some of the highest property-tax bills in the country, this one date is among the most valuable things on a homeowner’s calendar.
This article was produced with AI assistance and reviewed by a human editor. Figures are linked to their primary sources; where a claim could not be verified from the public record, we say so.
