How to calculate your estimated tax bill
The math is simple once you have the pieces. Appraised value, minus exemptions, times the combined tax rate, equals your annual property tax.
Say you buy a $350,000 home in a Houston suburb with a combined rate of about 2.1 percent. Before any exemptions, that's about $7,350 a year, or a little over $610 a month folded into your mortgage payment. Apply the homestead exemption (more on that next) and you might bring it down into the $5,500 to $6,000 range.
You don't have to guess. Every County Appraisal District posts the current rates, and most have a Texas property tax calculator right on the site. You can also pull up any listing's address on the appraisal district site and see exactly what the current owner pays today.
The Texas homestead exemption, your biggest lever
If you're going to live in the home, file for the homestead exemption. It's the single best way to cut your bill, and it's free.
The Texas homestead exemption knocks a chunk off your home's taxable value for school district taxes, which is the largest part of your bill. Texas voters approved raising that exemption to $140,000 in late 2025, up from $100,000. So the first $140,000 of your home's value is exempt from school taxes. On a $350,000 home, the school district only taxes you on $210,000. Confirm the current figure with your appraisal district, since the legislature keeps changing it.
A few more things worth knowing:
Homeowners who are 65 or older, or who have a disability, get an extra exemption on top
Once your homestead is in place, there's a 10 percent cap on how much your appraised value can rise each year, which protects you when prices spike
You apply through your County Appraisal District, usually with a one-page form, and you only have to do it once
Don't skip this. A surprising number of new buyers forget to file and overpay for a year before they catch it.






