Texas Property Tax Estimate: Formula, Exemptions, and Rates

To get a Texas property tax estimate for your home, you need four things: the appraised value of the property, any exemptions you qualify for, the tax rate charged by every local jurisdiction that bills your address, and a short formula to put them together. Texas has no state property tax, so the entire bill is built from local rates layered on top of each other. The statewide average effective rate is roughly 1.40%, which puts a $350,000 home somewhere near $4,900 a year before exemptions — but your actual number can land well below that once the homestead exemption, the appraisal cap, and any additional reductions do their work.

The Formula, With a Worked Example

For each taxing jurisdiction that covers your property, subtract the exemptions that jurisdiction allows from your appraised value, divide by 100, and multiply by that jurisdiction’s rate. Add the results together and you have your estimate.

Say your home has a capped appraised value of $350,000 and you have the general homestead exemption, which removes $140,000 from your school district taxable value. If the school district rate is $1.05 per $100:

  • Taxable value: $350,000 − $140,000 = $210,000
  • School taxes: ($210,000 ÷ 100) × $1.05 = $2,205

Now suppose your county offers a 20% homestead exemption (worth $70,000 on this property) and charges $0.42 per $100:

  • Taxable value: $350,000 − $70,000 = $280,000
  • County taxes: ($280,000 ÷ 100) × $0.42 = $1,176

School and county together come to $3,381. Add the city and any special districts the same way for your full estimate. The school district almost always makes up the largest share, often half or more of the total.

Finding Your Appraised Value

Every county in Texas has a central appraisal district that sets the market value of all property in the county as of January 1 each year.1Texas Comptroller of Public Accounts. Valuing Property Market value is the price a willing buyer and willing seller would agree on in an open sale, and the district builds that number from recent comparable sales, construction costs, and income data for rental or commercial property.

Pull your current appraised value from your county appraisal district’s website. Most districts let you search by address or owner name, and the listing shows your market value, any capped value, your current exemptions, and every taxing jurisdiction that bills you. That one lookup gives you two of the four inputs you need.

The 10% Homestead Appraisal Cap

If you own and occupy your home as a primary residence and have a homestead exemption on file, Texas law caps how fast your appraised value can rise. The appraisal district cannot increase your homestead’s appraised value by more than 10% per year over the previous year’s appraised value, plus the value of any new improvements.2State of Texas. Texas Tax Code TAX 23.23 A home you bought five years ago at $250,000 that now has a $400,000 market value is probably being taxed on something well below $400,000 because the cap has held it back year after year. For your estimate, use the capped value, not the market value.

The cap only applies to a residence homestead. Investment properties, vacant land, and commercial buildings are appraised at full market value every year. The cap also resets the first year you own a new home, so a first bill after a purchase can look steep compared to what the previous owner was paying.

Exemptions That Lower Your Taxable Value

Exemptions subtract a fixed dollar amount from your appraised value before the rate is applied. Several categories exist, and plenty of homeowners miss money by not filing for everything they qualify for.

General Residence Homestead

School districts must exempt $140,000 from the appraised value of your primary residence.3State of Texas. Texas Tax Code 11.13 – Residence Homestead Counties, cities, and special districts may add their own homestead exemptions, often a 20% reduction or a flat dollar amount. You have to apply with your county appraisal district, and the general deadline is May 1.4Texas Comptroller of Public Accounts. Property Tax Exemptions Late applications are accepted up to two years after the delinquency date for most homestead exemptions, so if you bought recently and never filed, do it now.

Over-65 and Disabled Homeowners

Homeowners who are 65 or older, or who have a qualifying disability, receive an additional $60,000 school district exemption on top of the general $140,000.3State of Texas. Texas Tax Code 11.13 – Residence Homestead A qualifying homeowner can shield $200,000 from school taxes before any city or county exemption.

These exemptions also lock in a school tax ceiling. The school tax amount in the first year you qualify becomes your cap, and school taxes will not exceed that amount as long as you own and live in the home, unless you add improvements like a room or a pool. Some cities and counties voluntarily adopt a similar ceiling, so check your local policies before estimating.

Disabled Veterans

Veterans with a VA disability rating receive an exemption that scales with the rating:5Texas Veterans Commission. Property Tax Exemptions Available to Veterans Per Disability Rating

The 100% exemption can also transfer to a surviving spouse who has not remarried, provided the spouse was living in the home at the time of the veteran’s death.

Finding the Local Tax Rates That Apply to You

Your property sits inside several overlapping taxing jurisdictions, and each sets its rate independently. A typical Texas homeowner pays a school district, a county, a city, and sometimes a municipal utility district, hospital district, or community college district. Rates are expressed as dollars per $100 of taxable value. A school district might charge $1.05 per $100 while the county charges $0.40, and you pay both along with every other entity that covers your address. Your appraisal district listing shows the full list of jurisdictions billing you — look up each one’s current rate on its own website.

Texas law requires each taxing unit to calculate two benchmark rates every year: the no-new-revenue rate, which would bring in the same total revenue as last year from properties taxed in both years, and the voter-approval rate, which is the maximum the unit can adopt without an election.7Texas Comptroller of Public Accounts. Truth-in-Taxation: Tax Rate Adoption For most taxing units other than school districts, the voter-approval rate allows roughly a 3.5% revenue increase for operations over the prior year. A jurisdiction that wants to go higher has to win an election.

Rates are typically finalized before September 30 each year. If you’re estimating earlier than that, use last year’s rates. They usually move only a few cents per $100 from year to year, which is close enough for planning.

If Your Estimate Looks Too High

Protesting your appraised value is the most effective lever most homeowners have. Every dollar you knock off the appraisal reduces your bill across every jurisdiction that taxes the property, and hundreds of thousands of owners file protests each year without hiring anyone.

The deadline to file is May 15, or 30 days after the appraisal district mails your notice of appraised value, whichever is later.8State of Texas. Texas Tax Code TAX 41.44 – Notice of Protest You file using Form 50-132 (Notice of Protest) with your county’s appraisal review board, though any written notice that identifies the property and states your disagreement with the appraisal is legally sufficient.9Texas Comptroller of Public Accounts. Appraisal Protests and Appeals

Most appraisal districts offer an informal meeting with a staff appraiser before the formal hearing, and many protests settle at that stage. Bring recent sale prices of comparable homes nearby, photos of condition issues like foundation problems or outdated systems, and any repair estimates. If the informal meeting doesn’t resolve it, the case goes to the appraisal review board, where you and the district each present evidence and can examine each other’s witnesses; you choose whether to go first or second.9Texas Comptroller of Public Accounts. Appraisal Protests and Appeals A professional appraisal helps but isn’t required. If the board rules against you, you can appeal to district court or, for homes appraised at $5 million or less, pursue binding arbitration.

When the Bill Is Due

Tax bills go out starting in October, and you have until January 31 to pay without penalty or interest.10Texas Comptroller of Public Accounts. Paying Your Taxes After February 1, costs stack up fast. A delinquent bill incurs a 6% penalty the first month plus 1% for each additional month through June. On July 1 the total penalty jumps to 12% regardless of how many months you’ve been late. Interest accrues separately at 1% per month from the delinquency date and keeps running until the balance is paid.11State of Texas. Texas Tax Code TAX 33.01 – Penalties and Interest A homeowner who misses the January deadline can owe 18% or more on top of the original tax by midsummer, and collection attorneys often add their own fees after July 1. If you know you’ll need more time, contact your local tax office before the deadline about split or partial payment options rather than letting the bill go unpaid.