Key Takeaways
Texas property taxes are calculated using a simple formula, but the inputs are anything but simple.
- Your tax bill equals your taxable value (tax appraised value minus exemptions) times the combined local tax rates of every entity that taxes your property.
- The tax appraised value reflects what your property would have sold for as of January 1; your County Appraisal District (CAD) sends a preliminary value in spring that’s finalized through the protest process, and local taxing entities set the rates each fall.
- November 2025 constitutional amendments raised the school district homestead exemption to $140,000 (retroactive to the 2025 tax year), with an additional $60,000 for seniors and homeowners with disabilities.
The two pieces of the formula you can directly influence are your tax appraised value (by protesting) and the exemptions you file, which is why annual protesting and keeping exemptions current matter for every Texas homeowner.
If you’ve ever stared at your Texas property tax bill and wondered where the number comes from, you’re not alone. Understanding how property taxes are calculated in Texas is the first step toward making sure you aren’t paying more than your fair share.
Texas property taxes are among the highest in the country because Texas has no state income tax, so local governments lean heavily on property taxes for schools, roads, and emergency services. The good news: the calculation follows a clear formula, and once you understand the moving parts, you can spot where the system might be working against you.
How Are Property Taxes Calculated in Texas?
How property taxes are calculated Texas-wide follows the same formula in every county. Your county appraisal district places a value on your property each January 1. Each local taxing entity with authority over your property (school district, city, county, special districts) sets its own tax rate after reviewing budgets each fall. Subtract any exemptions from your tax appraised value, multiply the remaining taxable value by the combined tax rate, and you have your bill.
The wrinkle: each taxing entity calculates its piece separately, using its own rate and the exemptions that apply to it. Your school district might use a different exemption amount than your city, so taxable values can differ across entities. Add it all up to get your total.
Tax bills are mailed starting in October by your County Tax Assessor-Collector, a separate office from your appraisal district. Payment is due by January 31 of the following year, and penalties begin accumulating on unpaid balances starting February 1.
The Texas Property Tax Formula: Breaking Down the Components
The Texas property tax formula has three main components: your tax appraised value, the exemptions that reduce it, and the combined tax rate. Each piece is set by a different group and follows different rules.
Your Tax Appraised Value
Your County Appraisal District determines a value reflecting what your property would have sold for as of January 1. You’ll typically see this preliminary value on your Notice of Appraised Value, mailed in April. From there, the number is either accepted (if you don’t protest by May 15) or finalized through the protest process. Because the CAD must value thousands or millions of properties at once, it uses mass appraisal techniques.
CADs apply three primary approaches: sales comparison (recent sales of similar properties), cost (what it would cost to rebuild today), and income (used mainly for rental and commercial property). For most single-family homes, sales comparison drives the result. The Texas Property Tax Code requires CADs to appraise at market value as of January 1, but because the process relies on mass appraisal rather than walking your property, the resulting number can be inaccurate.
Exemptions That Reduce Your Taxable Value
Exemptions are dollar amounts subtracted from your tax appraised value before the tax rate is applied. The most common is the general residence homestead exemption, now $140,000 for school district taxes thanks to constitutional amendments Texas voters approved in November 2025. According to Ballotpedia, the new exemption applied to tax years beginning January 1, 2025, so it’s retroactive to the 2025 tax year, not a 2026 change.
Homeowners 65 and older and those with qualifying disabilities get an additional $60,000 school district exemption, for a combined $200,000. Counties, cities, and other taxing units may offer optional homestead exemptions of their own. Disabled veterans and surviving spouses of veterans or first responders killed in the line of duty may also qualify for partial or full exemptions. Under SB 1801, counties must verify homestead exemptions every five years, so respond promptly to any verification request to keep yours active.
Combined Local Tax Rates
Texas has no state property tax, so more than 4,000 local taxing units set their own rates. Your school district usually accounts for the largest single share, followed by your county, your city, and any special districts (water, hospital, junior college, emergency services). Each rate is expressed per $100 of taxable value.
Rates are set each September or October after each entity reviews its budget. Under Texas truth-in-taxation rules, entities must hold public hearings and meet specific notice requirements before adopting a rate that would raise more revenue than the previous year. Once rates are adopted and certified appraisal rolls are delivered, the tax assessor calculates and mails the bills.
Appraisal Value vs Market Value Texas: What’s the Difference?
A common source of confusion about how property taxes are calculated in Texas is the distinction between appraisal value vs market value Texas homeowners encounter on their Notices of Appraised Value. The terms sound interchangeable, but they have specific meanings, and the difference matters when you’re deciding whether to protest.
Market value is what your property would sell for in an open-market transaction between a willing buyer and seller. The Texas Tax Code requires appraisal districts to value property at market value as of January 1, so in theory the tax appraised value and the market value should match. In practice, they often don’t.
Your tax appraised value is the CAD’s estimate of market value, produced by mass appraisal rather than by anyone actually looking at your property. Because mass appraisal relies on broad data sets and standardized adjustments, it frequently misses property-specific issues that would lower a true market price, like a damaged roof, an outdated electrical system, or a difficult floor plan. That gap is what most protests focus on. Our explainer on why these two numbers differ walks through the practical implications.
“Tax appraised value” and “taxable value” are also distinct. The tax appraised value is what the CAD says your property is worth before exemptions. Your taxable value is what’s left after exemptions, and it’s the number the tax rate is applied to.
A Worked Example: How the Calculation Looks in 2026
To show how property taxes are calculated in Texas with real numbers, let’s walk through a typical 2026 homeowner. Imagine your CAD sets your tax appraised value at $400,000 as of January 1. You have a general residence homestead exemption ($140,000 for school district), plus a $25,000 county homestead exemption and a $10,000 city homestead exemption.
For the school district portion, your taxable value is $400,000 minus $140,000, or $260,000. If your school district rate is $1.05 per $100, the school district piece is ($260,000 ÷ 100) × $1.05 = $2,730. For the county portion at $0.45 per $100 on a taxable value of $375,000, you’d owe $1,687.50. For the city portion at $0.50 per $100 on $390,000, that’s $1,950. Special districts add another $260 or so. Total annual bill: roughly $6,627. The math itself is straightforward once you have the inputs, but the inputs are where the complexity lives.
When the 10% Homestead Cap Changes the Math
For homesteaded properties with at least one full base year of homestead occupancy, Texas Tax Code §23.23 caps annual increases in the tax appraised value used for taxation at 10% per year. If your true market value rose 25% from one year to the next, the cap-limited value can only go up 10%. The full market value still shows on your notice, but the lower capped value flows through the formula.
If the cap is already holding your taxable value below your tax appraised value, a protest reduction may not lower your current bill, because the cap was already limiting what you’d pay. In those cases, protesting still matters: it lowers the baseline for future years, where the cap-limited number will eventually catch up. Our deep dive on why annual protests matter long-term explores this dynamic for long-tenured homeowners.
What Influences Your Tax Appraised Value?
The CAD considers dozens of data points when setting your tax appraised value. Knowing what moves the needle (and what doesn’t) helps you understand whether the value is fair.
- Recent sales of similar properties: The biggest single driver. CADs use neighborhood-level sales data adjusted for differences in size, age, and features.
- Property characteristics on file: Square footage, lot size, bedrooms, bathrooms, year built, and garage type all feed the model.
- Substantial improvements: Additions, in-ground pools, garage conversions, and other changes that add square footage can raise the tax appraised value. Interior remodeling like a new kitchen typically does not.
- Property condition issues: Roof damage, foundation problems, and deferred maintenance can lower true market value, but they’re often invisible to the CAD unless you bring evidence forward in a protest.
- Neighborhood and location factors: Proximity to a freeway, a new commercial development, or an environmental issue can affect value, but only if the mass appraisal model captures it.
If you spot a factual error on your property record (incorrect square footage, wrong number of bathrooms), contact your CAD directly to correct it. That’s a separate process from a protest.
The Only Number You Can Influence: Your Tax Appraised Value
Tax rates are set by elected and appointed local officials, and exemptions are defined by state law and local taxing unit policy. Both are largely out of your hands once adopted. The one piece you can directly challenge is your tax appraised value, and that’s what protesting is for.
Every Texas homeowner has the right to protest each year. The deadline is May 15 or 30 days after your Notice of Appraised Value is mailed, whichever is later. A protest reduction can lower your current year’s bill (for properties not held in check by the homestead cap) and lowers the baseline for future years. Protesting annually is worthwhile regardless of whether your value looks reasonable, because the only way to know with certainty that your number is fair is to put the evidence through the protest process.
Texas law prohibits any company from promising or guaranteeing a specific reduction, so be cautious of any service that does. What you can reasonably expect from licensed local property tax professionals is a complete annual protest, evidence-based representation, and a clear answer about whether your value was fair.
Frequently Asked Questions
What’s the difference between an appraisal district and a tax assessor in Texas?
Your County Appraisal District values your property and handles protests. Your County Tax Assessor-Collector is a separate office that takes the certified appraisal roll, applies the rates set by local taxing units, mails the bill, and collects payment.
When does the $140,000 homestead exemption apply?
The increased $140,000 school district homestead exemption was approved by Texas voters in November 2025 (Proposition 13) and applies retroactively to the 2025 tax year. The Texas Tribune reported the state allocated $51 billion over two years to fund this and related relief measures.
Does protesting always lower my tax bill?
Not always. If your home is homesteaded and the 10% cap is already holding your taxable value below your tax appraised value, a protest reduction may not lower the current year’s bill. It still lowers the baseline for future years, where the cap-limited value can eventually catch up to a reduced tax appraised number, so it remains worthwhile.
How is the over-65 school tax freeze calculated?
When a homeowner turns 65, the school district tax bill is frozen at the lower of the amount paid the year the homeowner turned 65 or the amount paid the following year. The freeze stays in place as long as the homeowner lives in the home, and can transfer to a new Texas primary residence in certain cases.
Can my property tax bill go up even if rates go down?
Yes. If your tax appraised value rises faster than rates fall, your bill can still increase. This is one reason the relationship between tax rates and tax bills is more complicated than it sounds.
Take Control of the One Number You Can Influence
Understanding how property taxes are calculated Texas-wide is the first step toward keeping more of your money. Tax rates and exemption amounts are largely out of your hands, but your tax appraised value is yours to challenge every year.
Our team at Home Tax Shield handles the entire protest process for you, with licensed local professionals reviewing your property, gathering evidence, and representing you at every step from informal conferences through formal ARB hearings. We don’t promise specific savings (no one legally can), but we do guarantee a complete annual protest and a clear answer about whether your value was fair. Ready to put your tax appraised value to the test for 2026? Contact us today to get started.