What is a property tax appeal?

A property tax appeal (also called a protest in Texas) is a formal process where you challenge your county appraiser's assessed value of your home. You file with the county Appraisal Review Board (ARB), present comparable-sales evidence that your home is overvalued, and the board issues a ruling.

When is the Texas property tax appeal deadline?

In Texas, the deadline to file a property tax protest is May 15 each year (or 30 days after your appraisal notice is mailed, whichever is later). The 2026 deadline has passed; the next protest window is April-May 2027.

How much can I save by appealing my property taxes?

Homeowners who appeal save an average of $774 per year in Texas, and you can protest again every year. Success rates range from 80-91% when you bring 3-5 comparable sales as evidence.

What's the difference between AppealMyTax and Ownwell?

AppealMyTax charges a flat $99, one time, for a complete personalized appeal packet you file yourself, or $199-$249 for our done-for-you filing service. You keep 100% of your savings every year. Ownwell keeps a 25-35% contingency on whatever you save and O'Connor keeps about half, meaning a $2,461 reduction costs you roughly $615-$1,230 every year forever. We charge $99 once and keep nothing.

REI tax-savings data · 78621 · KILLEEN

78621 investment property tax appeal

434 properties in 78621 are over-assessed by 5%+ relative to peer comps — silently losing an average $2k/yr each to inflated property tax.

Live zip data

78621 (KILLEEN) — over-assessment breakdown

Total homes

3,238

Over-assessed

13.4%

434 properties

Aggregate overpayment

$1.1M/yr

Avg savings per appeal

$2k/yr

per over-assessed property

20-year NPV per property: ~$50k at simple 0% discount, or roughly $30k discounted at 5%. That's the typical present-value swing on a single successful appeal in 78621.

Sample 78621 properties (highest assessed)

Run any address to see its appeal upside

Address	Assessed	Sqft	Year
4800 CR 466	$4.9M	—	2016
650 CR 468	$2.3M	1,216	—
651 FM 619 SPUR	$2.1M	4,884	1994

These are top-assessed properties in 78621 per public records. Investors: each of these is a candidate for a tax-appeal evaluation before underwriting a purchase.

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Texas effective tax rate ≈ 2.15% · TX §41.43(b)(3) unequal-appraisal protest, annual deadline May 15