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Katy, Waller County, Texas Property Taxes

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Property Taxes in Katy, Texas

  • Median Katy, Texas effective property tax rate: 2.38%, significantly higher than the national median of 1.02%, and higher than the Texas state median of 1.48%.

  • Median Katy, Texas home value: $414,930

  • Median annual Katy, Texas tax bill: $8,817, $6,417 higher than the national median property tax bill of $2,400.

How are property taxes in Waller County calculated?

Property taxes in Katy, 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 Katy's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Katy, knowing local tax details benefits homeowners and investors.

Last Updated April 13, 2026

Katy, Waller County, Texas Property Tax Bill Calculator

$100,000

$1,500,000

$3,000,000

Median Effective Tax Rate

2.38%

Estimate Property Tax Bill

$9,875

$9,164

SAVE WITH OWNWELL

$774

Average Annual Tax Savings

How Does the Katy Property Tax Calculator Work?

Use this Katy property tax calculator to estimate your annual tax bill. Enter your property's assessed value and our calculator applies Katy's median effective tax rate of 2.38% — based on actual property records in Waller 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 Katy'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 Katy: rates range from $8,785 in 77493 to $14,817 in 77494, primarily due to differences in school district levies and local assessment districts. Katy's median property tax bill of $8,817 is higher than the $2,400 national median property tax bill and higher than the $6,417 difference in the state median property tax bill.

If your estimate is higher than expected, Ownwell can appeal your Katy assessment — you only pay if we save you money.

About Katy Property Taxes

About Property Taxes in Katy, Waller, Texas

Katy’s median effective property tax rate of 2.38% is higher than the Texas state median of 1.48% and higher than the national median of 1.02%. This rate reflects the Waller County base levy combined with local school district levies and Municipal Utility Districts (MUDs) that vary by subdivision throughout the city.

Property tax rates are not uniform across Katy. Homeowners in the 77494 ZIP code carry a median effective rate of 2.64%, while those in 77493 pay 2.37%. This spread — 0.27 percentage points across the same city — reflects how school district boundaries and local assessment districts are drawn across Waller County. Understanding which part of Katy you live in can make a meaningful difference to your annual tax bill.

Katy 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 Katy, Waller 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 Katy's effective property tax rate to other cities in Texas and the median property tax rates in Texas and the U.S.

Property Tax Rates Across Katy, Waller County, Texas

Source: Ownwell

0.67%

1.66%

2.64%

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 Katy Tax Rate

2.38%

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 Waller County Tax Rate

1.72%

Median Effective Texas Tax Rate

1.48%

Median Effective United States Tax Rate

1.02%

Property Tax Rates Across Katy, Waller County, Texas

Zip10th Percentile25th PercentileMedian Tax Rate75th Percentile90th Percentile
774931.12%1.79%2.37%3.01%3.29%
774942.25%2.52%2.64%2.68%2.97%
77423N/AN/AN/AN/AN/A
77449N/AN/AN/AN/AN/A

Source: Ownwell

Property Tax Assessment Values Across Katy, Waller County, Texas

When examining property taxes in Katy, 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 Waller 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:

In Waller County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of April.

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. By providing insights into how assessed and market values are determined, this section helps property owners navigate their tax responsibilities and understand the valuation processes affecting their property taxes in Katy.

For example, the median home price in Katy is $414,930, with tax bills ranging significantly across the county. 77494 has the highest median home price at $582,435.

Property Tax Assessment Values Across Katy, Waller County, Texas

Source: Ownwell

$170,105

$376,270

$582,435

Median Katy Market Value

$414,930

Median Waller County Market Value

$256,750

Median Texas Market Value

$258,851

Median United States Market Value

$235,294

Property Tax Assessment Values Across Katy, Waller County, Texas

Zip10th Percentile25th PercentileMedian Home Price75th Percentile90th Percentile
77493$61,185$243,628$413,710$563,272$721,282
77494$343,425$535,448$582,435$638,692$1,581,510
77423N/AN/AN/AN/AN/A
77449N/AN/AN/AN/AN/A

Source: Ownwell

Property Tax Bills Across Katy, Waller County, Texas

Property tax bills in Katy are based on the assessed value of a home and the local tax rates set by taxing authorities. The amount you owe is determined by multiplying the assessed value by the applicable tax rate, so changes in market value, exemptions, and local rates can all affect the final bill. With a median home price of $414,930, homeowners in Katy can face substantial property tax bills, especially when assessed values rise faster than expected.

How much do property taxes cost in Katy? The 25th percentile tax bill is $2,706, while the 75th percentile reaches $12,649 and the 90th percentile climbs to $16,595. The highest median tax bill is $14,817 in ZIP code 77494, compared with $8,785 in ZIP code 77493. Since the national median property tax rate is 1.02% and the national median property tax bill is $2,400, Katy homeowners often pay more than the national norm.

Ownwell helps homeowners lower property tax bills by reviewing assessments, identifying savings opportunities, and handling appeals to help ensure you are not overpaying.

Property Tax Bills Across Katy, Waller County, Texas

Source: Ownwell

$1,731

$8,274

$14,817

Median Katy Tax Bill

$8,817

Median Waller County Tax Bill

$2,975

Median Texas Tax Bill

$3,441

Median United States Tax Bill

$2,400

Property Tax Bills Across Katy, Waller County, Texas

Zip10th Percentile25th PercentileMedian Tax Bill75th Percentile90th Percentile
77493$1,665$2,692$8,785$12,601$16,562
77494$11,562$13,755$14,817$19,071$43,817
77423N/AN/AN/AN/AN/A
77449N/AN/AN/AN/AN/A

Source: Ownwell

Don't miss the deadline to protest!

Frequently Asked Property Tax Questions in Katy, Texas

How are property taxes calculated in Katy, Texas?
Property taxes in Katy, Texas are calculated by multiplying your property's assessed value by the applicable tax rate set by local taxing authorities. The assessed value is determined by the county assessor and may differ from your property's market value depending on local assessment ratios and exemptions.
How do I appeal my property taxes in Katy, Texas?
To appeal your property taxes in Katy, Texas, you typically need to file a formal protest or appeal with your local appraisal district or assessor's office by the stated deadline. You'll need evidence such as comparable sales, a recent independent appraisal, or documentation of property condition issues. Ownwell can handle this entire process for you.
What property tax exemptions are available in Katy, Texas?
Common property tax exemptions in Katy, Texas include homestead exemptions for primary residences, senior citizen exemptions, veteran exemptions, and disability exemptions. Exemption amounts and eligibility requirements vary by county. Contact your local appraisal district or check Ownwell for details specific to your property.
When are property taxes due in Katy, Texas?
Property tax deadlines in Katy, Texas vary by county but typically include an assessment notice period in spring or early summer, followed by an appeal deadline, and a tax payment due date in the fall or winter. Check with your county assessor's office for specific dates in your area.
How can Ownwell help reduce my property taxes in Katy, Texas?
Ownwell provides professional property tax appeal services in Katy, Texas. Our team analyzes your assessment, gathers evidence, files all paperwork, and represents you at hearings — all with no upfront cost. You only pay a percentage of your savings if we successfully lower your tax bill.