Austin, Williamson County, Texas Property Taxes
Property Taxes in Austin, Texas
Median Austin, Texas effective property tax rate: 1.55%, significantly higher than the national median of 1.02%, and higher than the Texas state median of 1.48%.
Median Austin, Texas home value: $473,027
Median annual Austin, Texas tax bill: $7,364, $4,964 higher than the national median property tax bill of $2,400.
How are property taxes in Williamson calculated?
Property taxes in Austin, Texas are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding Austin's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Austin, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
Austin, Williamson County, Texas Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
1.55%
Estimate Property Tax Bill
$7,332
$6,804
$774
Average Annual Tax Savings
How Does the Austin Property Tax Calculator Work?
Use this Austin property tax calculator to estimate your annual tax bill. Enter your property's assessed value and our calculator applies Austin's median effective tax rate of 1.55% — based on actual property records in Williamson County — to generate your estimate.
Enter your property's estimated assessed value — the figure the local appraisal district uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Austin's median effective rate across all local levies, providing a more accurate estimate than applying a single county millage rate.
Your bill may vary by ZIP code within Austin: rates range from $5,497.00 in 78728 to $8,993.00 in 78717, primarily due to differences in school district levies and local assessment districts.
If your estimate is higher than expected, Ownwell can appeal your Austin assessment — you only pay if we save you money.
About Austin Property Taxes
About Property Taxes in Austin, Williamson, Texas
Austin’s median effective property tax rate of 1.55% is higher than the Texas state median of 1.48% and higher than the national median of 1.02%. This rate reflects the Williamson County base levy combined with local school district levies and Municipal Utility Districts that vary by subdivision throughout the city.
Property tax rates are not uniform across Austin. Homeowners in the 78717 ZIP code carry a median effective rate of 1.60%, while those in 78728 pay 1.30%. This spread — 0.30 percentage points across the same city — reflects how school district boundaries and local assessment districts are drawn across Williamson County. Understanding which part of Austin you live in can make a meaningful difference to your annual tax bill.
Austin homeowners who believe their assessed value is too high can file a formal appeal with the local Appraisal District before the May 15, 2026 deadline each year.
If your estimated bill above seems higher than expected, Ownwell can review your assessment and protest on your behalf. You only pay if we save you money.
Property Tax Rates Across Austin, Williamson County, Texas
As noted earlier, local government entities set tax rates, which can vary widely within a state.
Why? Because annually, each county estimates its required budget to provide services and divides that by the total value of all taxable property within its jurisdiction. This calculation results in the property tax rate.
While there are votes and laws involved in setting tax rates and budgets, in a nutshell, this is the annual process.
Below, you can compare Austin's effective property tax rate to other cities in Texas and the median property tax rates in Texas and the U.S.
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Austin Tax Rate
1.55%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Williamson County Tax Rate
1.53%
Median Effective Texas Tax Rate
1.48%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Austin, Williamson County, Texas
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 78717 | 1.10% | 1.48% | 1.60% | 1.79% | 2.05% |
| 78728 | 0.49% | 1.25% | 1.30% | 1.50% | 1.51% |
| 78729 | 0.71% | 1.24% | 1.48% | 1.74% | 1.86% |
| 78750 | 0.54% | 1.06% | 1.58% | 1.98% | 1.98% |
| 78759 | 0.50% | 1.00% | 1.53% | 1.86% | 1.86% |
| 78702 | N/A | N/A | N/A | N/A | N/A |
| 78727 | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
$774
Average Annual Tax Savings
Save on Your Property Taxes and More With Ownwell
Property Tax Assessment Values Across Austin, Williamson County, Texas
When examining property taxes in Austin, Texas, understanding the distinction between market value and assessed value is crucial.
The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. The Williamson County appraisal district estimates the market value for tax purposes.
The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
Assessment notices are sent in April each year and typically reach your mailbox by the middle of the month. Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill.
For example, the median home price in Austin is $473,027, with tax bills ranging significantly across Williamson County. ZIP code 78717 has the highest median home price at $564,808, while ZIP code 78728 has the lowest median tax bill at $5,497. Austin’s median tax bill of $7,364 is well above the national median property tax bill of $2,400.
Property Tax Assessment Values Across Austin, Williamson County, Texas
Source: Ownwell
$34,594
$349,717
$664,840
Median Austin Market Value
$473,027
Median Williamson County Market Value
$408,017
Median Texas Market Value
$258,851
Median United States Market Value
$235,294
Property Tax Assessment Values Across Austin, Williamson County, Texas
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 78717 | $410,144 | $478,206 | $564,808 | $678,456 | $810,562 |
| 78728 | $241,771 | $329,223 | $431,128 | $501,450 | $538,093 |
| 78729 | $362,363 | $395,504 | $440,801 | $495,390 | $548,566 |
| 78750 | $317,759 | $357,701 | $401,244 | $441,399 | $480,338 |
| 78759 | $306,894 | $348,599 | $398,105 | $427,052 | $460,155 |
| 78702 | N/A | N/A | N/A | N/A | N/A |
| 78727 | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
$774
Average Annual Tax Savings
Save on Your Property Taxes and More With Ownwell
Property Tax Bills Across Austin, Williamson County, Texas
Property tax bills in Austin are based on the assessed value of a home, which is then multiplied by the local tax rate. For homeowners in Williamson County, the median home price is $473,027, and that value helps shape the size of the tax bill. The result can vary widely: the 25th percentile tax bill is $5,725, while the 75th percentile is $9,261 and the 90th percentile reaches $11,539. That means many homeowners pay well above the national median property tax bill of $2,400.
Your tax bill affects monthly housing costs and can make ownership more expensive than expected, especially when assessed values rise. Even within Austin, bills differ by ZIP code, with the highest median tax bill at $8,993 in 78717 and the lowest median tax bill at $5,497 in 78728.
Ownwell helps homeowners lower property tax bills by reviewing assessments, identifying savings opportunities, and filing appeals to challenge unfairly high taxes.
Median Austin Tax Bill
$7,364
Median Williamson County Tax Bill
$6,257
Median Texas Tax Bill
$3,441
Median United States Tax Bill
$2,400
Property Tax Bills Across Austin, Williamson County, Texas
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 78717 | $5,684 | $7,416 | $8,993 | $11,023 | $13,467 |
| 78728 | $843 | $3,200 | $5,497 | $6,587 | $7,090 |
| 78729 | $3,082 | $5,090 | $6,352 | $7,610 | $9,001 |
| 78750 | $2,200 | $4,159 | $6,350 | $7,402 | $8,441 |
| 78759 | $1,760 | $3,333 | $6,105 | $7,142 | $7,756 |
| 78702 | N/A | N/A | N/A | N/A | N/A |
| 78727 | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
$774
Average Annual Tax Savings
Save on Your Property Taxes and More With Ownwell
Don't miss the deadline to protest!
Dates | |
|---|---|
| Appeal Deadline | May 15 |
| Tax Bill | |
| Issued | October 1 |
| Due Date #1 | January 31 |
Links | |
|---|---|
| Williamson Appraisal District | |
| Phone | (512) 930-3787 |
| Website | search.wcad.org |