Missing a deadline in Texas property tax law is unforgiving. If you miss the window to appeal, you forfeit your right to lower your taxes for the entire year, locking you into whatever inflated value the county assigned to your real estate. Whether you own a residential home or a commercial portfolio, knowing exactly when property taxes are due is critical to protecting your bottom line.
The absolute most critical date on the calendar is the deadline to file a property tax protest. In Texas, the general deadline is May 15th, or 30 days after your Notice of Appraised Value is delivered to you—whichever is later.
If you fail to file your Notice of Protest by this date, the county's assessed value becomes final. You will be forced to pay taxes on that amount, regardless of how inaccurate it is.
Here are the key dates every Texas property owner needs to circle on their calendar for the 2026 tax year:
While the State of Texas sets the overarching tax code, your local county appraisal district is responsible for executing it. It is important to watch the mail closely, as exact mailing dates for value notices can vary slightly by county. Keep an eye out for:
If you miss the May 15th deadline, your options are severely limited. Under Section 25.25 of the Texas Property Tax Code, there are very narrow exceptions for late protests—such as correcting a clerical error, a multiple appraisal, or an error that overstates the value by more than one-third. However, these are incredibly difficult to prove without an attorney.
Let the legal experts handle your deadlines and your protest.
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Brandon’s tenacity and responsiveness resulted in a fair assessment and the largest value change I've seen in my career.
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