Travis Bunn
Founder, AppealDesk · Published February 28, 2026 · Updated March 17, 2026
The 2026 filing window closed on May 15, 2026. The rule is May 15, so the next deadline is May 15, 2027. Use the time before it opens to build the evidence.
Check your property now, $49 flat fee →Start your Texas appeal: Harris County · Dallas County · Travis County · Bexar County · Tarrant County · Collin County · Denton County · Fort Bend County · Williamson County · Montgomery County
Knowing your deadline is half of it. The other half is whether the county’s number is actually too high, because a deadline you meet with no case is just paperwork. Checking your number is free and takes about a minute.
Free to check. No account needed.
Updated March 2026
The deadline to appeal your 2026 Texas property tax assessment is May 15, 2026.
That's 76 days from today. If you miss it, you're locked into your current assessment for the entire year.
Texas law requires counties to mail notices by April 1. If you haven't received yours:
Most Texas counties now post values online in late February or early March.
Sometimes. Texas allows extensions for "good cause" including:
Regular travel or "I forgot" don't qualify. Extensions must be requested in writing before May 15.
Missing May 15 means:
The average Texas homeowner who appeals saves $1,675 per year. Missing the deadline costs you that entire savings.
Knowing the date is the easy part. The date only matters if the county's number is actually too high, and nobody checks that number for you.
The number your appeal would challenge, pulled free in seconds. No account needed.
You don't need all your evidence on May 15, just the protest form. Evidence comes later.
Texas Property Tax Code Section 41.41 allows protests for:
Most successful: Unequal appraisal wins 89% of the time with proper evidence.
Here's what happens in May at appraisal districts:
File early. Seriously.
Minimum requirements for May 15:
That's it. Evidence comes later, but you must file the protest by May 15.
A real AppealDesk order, Harris County
In June 2026, a homeowner in Harris County ran the check. The county had their home on record at $3,148,044, while recorded sales of comparable homes supported about $2,391,577: an over-assessment of $756,467, worth roughly $11,138 per year if corrected. Their packet laid out the comparable sales, the forms, and the filing steps. Nobody at the county was ever going to run that check for them.
A deadline you meet with no evidence behind it is just paperwork. Comparable sales are what boards actually respond to, and pulling your county's number is where that starts.
Enter your address to pull your county record free. If it looks too high, your $49 packet gives you the comparable sales, forms, and filing steps.
Every day you wait is a day closer to losing your appeal rights. Consider:
Typical Texas property:
All lost if you miss May 15.
AppealDesk generates complete Texas appeal packets with:
Everything you need to meet the May 15 deadline and win your appeal.
No exceptions. No excuses. No second chances.
The counties count on procrastination. They know most people will "get to it later" and miss the deadline.
Don't be most people. Your assessment notice is sitting there. The deadline is approaching. Every day matters.
76 days until May 15. What will you do?