Missed the Texas Property Tax Protest Deadline? Here's What to Do

If you missed the May 15 property tax protest deadline in Texas, the short answer is: you’ve lost your protest rights for this tax year. That’s the reality, and I won’t sugarcoat it. Texas Property Tax Code is clear — the deadline is the deadline.

But there are a few narrow exceptions, and there are steps you can take right now to minimize the damage and make sure this never happens again.

What You Actually Lost

Missing the protest deadline means you cannot challenge your property’s assessed value through the standard protest process for the current tax year. Whatever the appraisal district decided your commercial property is worth — that’s what you’re paying taxes on.

Here’s what that costs in real dollars:

Property Value	Effective Tax Rate	Annual Tax	If Overassessed 15%	Overpayment
$1,000,000	2.1%	$21,000	$17,850	$3,150
$3,000,000	2.1%	$63,000	$53,550	$9,450
$5,000,000	2.1%	$105,000	$89,250	$15,750
$10,000,000	2.1%	$210,000	$178,500	$31,500

A commercial property owner with a $5 million building who misses one year’s protest could be overpaying by $15,750 or more. And that’s a conservative estimate — in fast-growing counties like Collin County or Travis County, overassessments of 20-25% aren’t uncommon.

The Three Exceptions (They’re Narrow)

Texas law does provide a few limited paths to protest after the standard deadline. Don’t get too excited — these are genuinely narrow.

1. Good Cause Late Filing

Under Texas Property Tax Code Section 41.44(b), the Appraisal Review Board may accept a late protest if you can demonstrate “good cause” for missing the deadline. Good cause means something beyond your control prevented you from filing on time.

Examples that have been accepted:

• Hospitalization or serious medical emergency during the filing period
• Military deployment
• Natural disaster affecting your ability to file

Examples that will not work:

• “I forgot”
• “I was busy with my business”
• “I didn’t know about the deadline”
• “My accountant didn’t tell me”

The ARB has discretion here, and they use it sparingly. If you have a legitimate good-cause claim, file it immediately with your county appraisal district. Include documentation — hospital records, deployment orders, whatever supports your case. There’s no guarantee they’ll accept it, but it costs nothing to try.

2. Late-Mailed Notice

If your county appraisal district mailed your Notice of Appraised Value after April 15, your actual deadline extends to 30 days after the mailing date. Check the date printed on your notice — not the postmark, not the date you received it, but the date the district printed on the notice itself.

This isn’t really “missing” the deadline. It’s the deadline being later than May 15. But many property owners don’t realize this applies to them.

3. Post-Deadline Value Changes

If the appraisal district changes your assessed value after the protest deadline has passed — which can happen through supplemental appraisals or error corrections — you get a new 30-day window to protest that change specifically.

This is unusual but not unheard of, particularly when appraisal districts discover errors in their records or when new construction is completed and the property gets reappraised mid-cycle.

What to Do Right Now If You Missed It

Step 1: Confirm you actually missed it. Check the mailing date on your Notice of Appraised Value. If it was mailed after April 15, your deadline might be later than May 15. Count 30 days from that mailing date.

Step 2: File a good-cause petition if applicable. If you have a legitimate reason, submit it to your county’s ARB immediately. Worst case, they say no.

Step 3: Evaluate whether you have a Section 25.25 correction claim. Texas Property Tax Code Section 25.25 allows corrections to the appraisal roll for clerical errors, multiple appraisals of the same property, or properties included on the roll that don’t exist. This isn’t a substitute for a protest, but if the district made a factual error about your property (wrong square footage, wrong property classification, incorrect ownership), you can get that corrected outside the protest timeline.

Step 4: Set up your 2027 protest now. Put May 15, 2027 on your calendar today. Better yet, hire a consultant who handles filing as part of their service so you never have to think about the deadline again.

The Real Cost of Missing Multiple Years

Here’s what most commercial property owners don’t think about: missing the protest deadline doesn’t just cost you one year of overpayment. It compounds.

If the appraisal district overvalued your property by 15% and you don’t protest, that inflated value becomes the baseline for next year’s appraisal. The district might increase it another 5-10% the following year on top of the already-inflated number. Two years of missed protests can put you 20-25% above where your value should be.

I’ve worked with commercial property owners who came to us after missing two or three years of protests. The first protest often results in a 20-30% reduction because the overassessment has been building. That’s money they can never recover for the years they didn’t file.

How to Make Sure You Never Miss It Again

The simplest solution for commercial property owners: hire a property tax consultant who files for you every year. That’s literally what we do — we monitor your property’s assessed value, file the Notice of Protest before the deadline, and handle the entire process from filing through hearing.

Our fee is 30% of first-year tax savings. If we don’t reduce your value, you don’t pay anything. More importantly, you never miss another deadline.

If you want to handle it yourself, at minimum:

• Set a recurring calendar reminder for April 1 every year (not May 15 — give yourself a buffer)
• Bookmark your county appraisal district’s online filing portal
• File as soon as you receive your Notice of Appraised Value — don’t wait

The protest deadline is one of those things where being a few days late costs real money. Get set up with us for next year so you don’t lose another dollar, or read more about how our process works.