Katy TX Property Taxes & MUD Taxes: 2027 Home Buyer Guide

How much are property taxes in Katy TX? There is no single Katy property tax rate. Your total depends on the specific property, taxable value, exemptions, county, school district, city or MUD, and other taxing jurisdictions. Even homes in the same master-planned community can have different MUDs and tax rates.

If you’re moving to Katy, Texas, one of the easiest mistakes to make is comparing homes by price without comparing their total property tax situation.

You might find two homes priced at $500,000.

They may even be in the same master-planned community.

But that doesn’t necessarily mean they’ll have the same property tax rate—or the same annual tax bill.

In fact, different sections within the same Katy-area neighborhood can be located in different Municipal Utility Districts (MUDs) or other taxing jurisdictions.

That’s why I don’t recommend asking:

“What’s the tax rate in this neighborhood?”

The better question is:

“What taxing jurisdictions apply to this specific property address?”

That distinction becomes especially important when you’re comparing new construction, resale homes, Katy mailing addresses, City of Katy properties and communities throughout Greater Katy and Fulshear.

Let’s break it down.

There Is No Single Katy TX Property Tax Rate

Texas property taxes are local.

Your property tax bill can be made up of taxes from several different governmental entities.

Depending on the property’s location, those can include:

  • County
  • School district
  • City
  • Municipal Utility District (MUD)
  • Emergency services district
  • Flood control or drainage district
  • Other special-purpose districts

Each applicable taxing unit can adopt its own tax rate.

The property is appraised, exemptions are applied where applicable, and the individual taxing jurisdictions calculate their portions of the tax bill.

So when someone asks:

“What’s the property tax rate in Katy?”

there isn’t one number that accurately answers the question.

You need the property address.

A Katy Mailing Address Doesn’t Tell You the Tax Rate

This is especially important if you’re relocating to Katy.

A property can have a Katy, TX mailing address without actually being located inside the City of Katy.

The Greater Katy housing market extends far beyond Katy’s municipal boundaries.

That means two listings can both say:

Katy, TX

while having very different combinations of:

  • City taxes
  • MUD taxes
  • County taxes
  • School district taxes
  • Other special district taxes
  • Utility providers

The City of Katy currently publishes its own municipal property tax rate.

But if the home you’re considering is outside City of Katy limits, that particular city tax may not apply.

Instead, the property may be located within one or more special-purpose districts.

This is one reason understanding the difference between City of Katy, a Katy mailing address and Greater Katy matters when buying a home.

What Is a MUD in Texas?

MUD stands for Municipal Utility District.

A MUD is a governmental district commonly used to provide infrastructure and services in developing areas, particularly where traditional city infrastructure isn’t available.

Depending on the district, services can involve things such as:

  • Water
  • Wastewater
  • Drainage
  • Infrastructure
  • Related facilities

A MUD may issue bonds to finance infrastructure.

Property taxes collected by the district can then help pay debt obligations and support district operations.

That’s why you’ll frequently encounter MUDs when shopping in master-planned communities around Katy and Fulshear.

MUD Tax and HOA Fees Are Not the Same Thing

This causes a surprising amount of confusion.

Your MUD and your HOA serve different purposes.

MUD

A Municipal Utility District is a governmental entity.

Its property tax may appear as one of the taxing jurisdictions associated with your property.

HOA

A homeowners association is the organization responsible for the private community obligations established by its governing documents.

HOA dues may help support things such as:

  • Community pools
  • Landscaping
  • Entry monuments
  • Private amenities
  • Common areas
  • Community management
  • Architectural enforcement

depending on the association.

So you could potentially pay:

Property taxes + MUD taxes + HOA dues

depending on the property.

Do not assume the MUD tax replaces the HOA fee or vice versa.

One Katy Neighborhood Can Have More Than One MUD

This is one of the most important things to understand when comparing Katy-area homes.

A large master-planned community may cross multiple MUDs or taxing jurisdictions.

That means asking:

“What’s the MUD for this neighborhood?”

may still be too broad.

Different sections—and potentially properties relatively close to each other—can have different taxing combinations.

For example, public tax records for the Katy area show multiple separately named utility districts associated with larger community areas.

That means I would never tell you:

“The tax rate in Neighborhood X is 2.7%.”

without verifying the specific property.

A more accurate answer is:

“Let’s look up the exact address and determine which taxing jurisdictions apply.”

That’s particularly important in larger master-planned developments where construction has occurred across multiple phases and districts.

Don’t Compare Katy Neighborhoods Using One Tax Rate

This is also why I’m not giving you a chart claiming:

Neighborhood Tax Rate
Community A X%
Community B X%
Community C X%

That might look helpful.

It could also be misleading.

If a community contains multiple MUDs, sections or taxing combinations, attaching one number to the entire neighborhood can give you the wrong expectation about a particular home.

Tax rates also change.

So instead of comparing neighborhood tax rates, compare property-specific tax jurisdictions.

What Makes Up a Katy Property Tax Bill?

Think of the total tax burden as layers.

School District

The school district is typically one of the largest components.

Many Katy-area properties are served by Katy ISD, while some communities buyers consider as part of the broader Katy/Fulshear search may be served by Lamar CISD or another district.

The school district has its own adopted tax rate.

County

Greater Katy crosses county lines.

The county associated with the specific property matters.

City

If the property is located within an incorporated municipality, applicable municipal taxes may be part of the equation.

Again:

Katy mailing address ≠ automatically inside City of Katy.

MUD

If the property is located within a Municipal Utility District, the MUD may levy its own property tax.

And remember:

Different sections of the same neighborhood can potentially have different MUDs.

Other Districts

Depending on the property, other taxing jurisdictions can also apply.

That’s why the combined property-specific tax picture is what matters.

Why MUD Tax Rates Can Differ

Not every MUD is at the same point in its life cycle.

A newer district may have substantial infrastructure-related debt.

An older district may have a different debt position.

Development can continue.

Property values can change.

Tax bases can grow.

Debt-service requirements can change.

District boards can adopt different rates from year to year.

So it isn’t accurate to say:

“MUDs are always X%.”

They’re not.

And it isn’t safe to assume that two MUDs inside the same larger master-planned community have identical rates.

Are MUD Taxes Permanent?

This needs a nuanced answer.

A MUD can have debt associated with infrastructure, but you shouldn’t assume the district or its tax automatically disappears as soon as a particular bond is paid.

A MUD can have multiple financial and operational responsibilities.

Rates can change over time as debt, operating needs and the tax base change.

So if someone tells you:

“That MUD will be gone soon.”

verify that claim directly through the district’s official financial and tax information.

Don’t base a home purchase on an assumption about what a future MUD rate might be.

The New-Construction Property Tax Mistake Katy Buyers Need to Avoid

This is particularly important if you’re buying a new home in Elyson, Sunterra, Cane Island, Jordan Ranch, Cross Creek West or another developing Katy-area community.

You find a $600,000 new construction home.

Then you pull up the prior year’s property tax bill.

It looks surprisingly low.

Maybe you think:

“Great. The property taxes aren’t nearly as high as I expected.”

Be careful.

The previous tax record may reflect the property as it existed on the applicable appraisal date.

That could mean:

  • Vacant land
  • A homesite
  • A partially constructed house
  • A property that had not yet been appraised as a completed home

Texas property appraisal generally looks at property value as of January 1.

So the old tax bill may not represent the future tax bill on your completed house.

Example: Why a New Home’s Old Tax Bill Can Be Misleading

Here’s a simplified hypothetical example.

Imagine you’re purchasing a completed new construction home for:

$600,000

But when you look at the previous tax records, the property was valued at only:

$100,000

because the completed improvement wasn’t yet reflected.

If the prior owner paid taxes based on that much lower taxable value, copying that old tax bill into your future monthly budget could seriously underestimate your costs.

Once the completed home is reflected in the appraisal, the taxable value can be dramatically different.

The takeaway:

Never estimate future property taxes on a new construction Katy home solely from the previous year’s tax bill.

Builder Monthly-Payment Advertisements Need Context Too

You may see a new construction advertisement promoting a monthly payment.

Look closely at the assumptions.

Ask:

  • What property tax rate was used?
  • What taxable value was assumed?
  • Does the estimate include the applicable MUD?
  • What homeowners insurance estimate was used?
  • Is mortgage insurance included?
  • Which interest rate assumptions were used?
  • Are discount points required?
  • Is an exemption assumed?
  • Is the payment based on a temporary or permanent rate incentive?

A low advertised payment can look attractive.

Your goal should be understanding what your realistic payment could be.

How to Estimate Property Taxes on a Katy Home

A simplified starting calculation is:

Taxable Value × Combined Tax Rate = Estimated Annual Property Tax

For example, suppose we’re illustrating a home with:

$500,000 taxable value

and a hypothetical combined tax rate of:

2.50%

The simplified calculation would be:

$500,000 × 0.025 = $12,500 per year

That’s approximately:

$1,042 per month

before considering other factors that may affect the final calculation.

Now look at what happens if the hypothetical combined rate changes:

Hypothetical Rate Annual Tax on $500,000
2.00% $10,000
2.50% $12,500
3.00% $15,000

The difference between 2% and 3% in this hypothetical is:

$5,000 per year

or approximately:

$417 per month.

These are illustrations only—not the tax rates of any particular Katy community.

That’s why taxes belong in your home comparison from the beginning, not after you’ve already chosen the house.

What Is the Texas Homestead Exemption?

If a property is your qualifying principal residence, you may be eligible for a residence homestead exemption.

An exemption reduces the taxable value used by an applicable taxing jurisdiction rather than simply changing the home’s market value.

Texas currently provides a substantial school-district residence homestead exemption, and other taxing jurisdictions may provide additional exemptions.

The exact impact depends on:

  • Your eligibility
  • The taxing entity
  • The exemption offered
  • The property’s taxable value

Don’t assume the seller’s exemptions will automatically become yours.

Verify your eligibility and application requirements with the appropriate appraisal district.

Don’t Assume the Seller’s Tax Bill Will Be Your Tax Bill

This is another major mistake.

A seller may have exemptions you don’t have.

Examples can include:

  • Residence homestead
  • Age-related exemptions
  • Disability-related exemptions
  • Other qualifying exemptions

There can also be appraisal limitations associated with a qualifying homestead.

So when you see the seller’s current annual tax bill, don’t automatically plug it into your mortgage calculator.

Your situation can be different.

Can Texas Property Taxes Only Increase 10% Per Year?

You’ve probably heard some version of:

“Texas property taxes can only go up 10% a year.”

That’s an oversimplification.

Texas has an appraisal limitation associated with qualifying residence homesteads.

But that doesn’t mean every component of your actual property tax bill can only increase 10%.

Among the issues involved are:

  • Appraised value
  • Market value
  • Taxable value
  • Exemptions
  • New improvements
  • Tax rates
  • Homestead qualification

Those are different concepts.

A qualifying homestead appraisal limitation generally restricts how quickly the appraised value used under that limitation can increase, subject to Texas law.

It is not a universal guarantee that your final property tax bill can never rise more than 10%.

New Improvements Matter

The appraisal limitation also shouldn’t be interpreted as a way to ignore newly added improvements.

Texas law treats qualifying new improvements differently within the homestead appraisal limitation calculation.

That’s another reason new construction and major property changes deserve property-specific analysis rather than a rule of thumb.

How to Check Property Taxes Before Buying a Katy Home

Here’s the process I recommend.

Step 1: Start With the Exact Address

Not the neighborhood.

Not the ZIP code.

Not the builder.

The exact property address.

Step 2: Determine the County

Greater Katy extends into multiple counties.

Identify which appraisal district and county tax resources apply.

Step 3: Pull the Property Record

Review the applicable appraisal district record.

Look at:

  • Appraised value
  • Market value
  • Taxable values
  • Exemptions
  • Property characteristics

For new construction, determine whether the appraisal appears to reflect the completed home.

Step 4: Identify Every Taxing Jurisdiction

Look for:

  • School district
  • County
  • City
  • MUD
  • Emergency services district
  • Flood/drainage district
  • Other special districts

Don’t stop after finding one tax rate.

Step 5: Verify the Specific MUD

This is especially important.

Do not assume that because another home in the same master-planned community is in MUD A, your property is also in MUD A.

Verify it.

Step 6: Review Current Adopted Tax Rates

Tax rates can change annually.

If the current year’s rates haven’t been adopted yet, clearly distinguish a proposed rate from an adopted rate.

Step 7: Review Exemptions

Determine which exemptions currently apply to the property and which ones you may qualify for.

Step 8: Estimate Using a Realistic Taxable Value

For new construction, don’t blindly use an old land-only or partial-construction appraisal.

Step 9: Talk to Your Lender

Ask your lender to model the mortgage payment using a realistic property-tax estimate.

Step 10: Recheck Before Closing

Tax information, exemptions and estimates should be reviewed again as part of your due diligence.

Where Do You Look Up Katy Property Taxes?

The correct resource depends on the property’s location.

For a specific Katy-area property, you may need to use the appropriate:

  • County appraisal district
  • County tax office
  • Texas property-tax database
  • MUD website or financial records
  • City tax information
  • School district tax information

For example, buyers in different parts of Greater Katy may encounter resources associated with Harris County, Fort Bend County or Waller County.

The Texas Comptroller also provides statewide property-tax information and links to local appraisal districts.

The important point is:

Use primary government records whenever possible.

Don’t rely solely on a real estate portal’s estimated tax rate.

Are Property Taxes Lower Inside the City of Katy?

Not necessarily.

This is exactly the kind of comparison that requires the whole tax stack.

A City of Katy property can have one combination of taxing jurisdictions.

A property outside the city may have another combination that includes a MUD.

But you can’t determine which total is lower simply by comparing:

City tax vs. MUD tax.

You need to add all applicable taxing entities and account for taxable value and exemptions.

The right comparison is:

Property A’s estimated total tax liability

versus

Property B’s estimated total tax liability.

Is a Lower Tax Rate Always Better?

From a purely tax-expense perspective, a lower rate on the same taxable value means a lower tax calculation.

But that’s not the only reason you choose a home.

A community with a higher total tax rate might offer:

  • Newer infrastructure
  • Different amenities
  • Newer homes
  • Different location
  • Different lot options
  • Different commute
  • Different utility structure

Meanwhile, an established community may have a different tax structure but an older home that requires more maintenance.

The goal isn’t necessarily:

“Find the lowest tax rate.”

It’s:

“Understand the total cost and decide whether the home and community are worth it to you.”

New Construction vs. Resale: Property Tax Considerations

This comparison deserves attention when you’re deciding between a new Katy home and an established neighborhood.

New Construction

Pay particular attention to:

  • Whether the prior appraisal reflects the completed home
  • Current MUD
  • Current combined tax rates
  • Builder tax estimates
  • Future development
  • Homestead timing
  • Escrow calculations

Resale

Pay attention to:

  • Seller exemptions
  • Seller appraisal limitations
  • Current taxable value
  • Your likely exemption eligibility
  • Current taxing jurisdictions
  • Whether the seller’s tax bill is representative of your situation

Neither new nor resale automatically has “better” taxes.

You have to run the numbers.

Don’t Let Property Taxes Choose the Neighborhood for You

Taxes matter.

But they should be one part of the decision.

If you’re comparing Cinco Ranch, Grand Lakes, Pine Mill Ranch, Elyson, Cane Island, Sunterra, Firethorne, Cross Creek Ranch, Jordan Ranch or another Greater Katy community, also compare:

  • Purchase price
  • Monthly payment
  • HOA
  • Insurance
  • Maintenance
  • Commute
  • Home age
  • Lot
  • Amenities
  • Trails
  • Pools
  • New construction vs. resale
  • Future development

Then compare the total cost against the lifestyle you’re getting.

A Better Way to Compare Two Katy Homes

Suppose you’re considering two homes.

Home A

$475,000 purchase price

Established neighborhood

Lower hypothetical tax expense

Older roof/HVAC

Higher expected maintenance

Home B

$475,000 purchase price

New construction

Higher hypothetical tax expense

New systems

Builder warranty

Possible builder financing incentive

Which one is cheaper?

You can’t answer that from the list price.

You need to compare the total ownership picture.

That’s why I encourage buyers to think in terms of monthly and long-term cost—not simply purchase price.

Questions to Ask Before Buying in a Katy MUD

When you’re considering a specific property, ask:

  1. Which MUD is this exact property located in?
  2. What is the district’s current adopted tax rate?
  3. Are there other special districts affecting the property?
  4. What is the current taxable value?
  5. Which exemptions does the seller currently have?
  6. Does the appraisal reflect the completed home?
  7. What would my estimated tax liability look like based on my circumstances?
  8. What are the HOA dues in addition to the taxes?
  9. Is there section-specific HOA or other community cost?
  10. Where can I review the district’s official financial information?

Those questions are far more useful than asking:

“Does this neighborhood have high taxes?”

FAQ: Katy TX Property Taxes & MUD Taxes

How much are property taxes in Katy TX?

There is no single Katy property tax rate. The total depends on the specific property’s taxable value, exemptions and taxing jurisdictions, which may include a county, school district, city, MUD and other special districts.

What is a MUD tax in Katy TX?

A MUD tax is a property tax levied by a Municipal Utility District. Depending on the district, MUD revenues can support operations and debt associated with infrastructure and utility services.

Do all Katy homes have MUD taxes?

No. Whether a property is located within a MUD depends on its specific location and taxing jurisdictions. A Katy mailing address alone does not tell you whether a MUD applies.

Can homes in the same Katy neighborhood have different MUDs?

Yes. Larger master-planned communities can span multiple MUDs or taxing jurisdictions. Buyers should verify the exact district associated with the individual property rather than relying on a neighborhood-wide tax-rate estimate.

Is a MUD tax the same as an HOA fee?

No. A MUD is a governmental district, while an HOA is a homeowners association. A property may have both MUD property taxes and HOA dues.

Why are property taxes higher in some Katy neighborhoods?

Differences can result from taxable values and the combination of applicable taxing jurisdictions, including school districts, counties, cities, MUDs and other special districts. MUD debt and operating requirements can also vary by district.

How do I find the tax rate for a Katy home?

Start with the exact address. Identify the county and appraisal district, review the property record, identify every applicable taxing jurisdiction and verify their current adopted tax rates through official government sources.

Why is the property tax bill on a new construction home so low?

A prior tax record may reflect the property when it was vacant land or when construction was incomplete. Once the completed home is reflected in the appraisal, the taxable value and resulting tax liability may be substantially different.

How should I estimate taxes on a new construction home in Katy?

Don’t rely solely on the previous year’s tax bill. Determine the applicable taxing jurisdictions and rates, use a realistic estimate of the completed property’s taxable value and account for exemptions you may qualify for. Ask your lender to model the payment using a realistic tax estimate.

Does the seller’s current tax bill tell me what I’ll pay?

Not necessarily. The seller may have different exemptions or appraisal limitations, and a new construction property may not yet have been appraised as a completed home. Your future tax liability should be estimated based on your circumstances.

Can Texas property taxes only increase 10% per year?

Not exactly. Texas has an appraisal limitation for qualifying residence homesteads, but it applies to appraised value under specific rules and does not mean every homeowner’s final tax bill is guaranteed to increase by no more than 10%.

Are property taxes lower inside the City of Katy?

Not necessarily. Properties inside and outside City of Katy can have different combinations of taxing jurisdictions. Compare the complete property-specific tax picture rather than comparing only a city tax rate with a MUD rate.

Moving to Katy TX?

Property taxes are one of the biggest reasons I recommend comparing specific properties, not just neighborhood names.

If you’re deciding between an established home in Cinco Ranch, Grand Lakes or Pine Mill Ranch and newer construction in Elyson, Sunterra, Cane Island or another Katy-area community, we can look at more than the asking price.

We can compare:

Home price + estimated taxes + HOA + insurance + location + amenities + commute + property condition.

That’s a much better way to decide what fits your budget.

Katy Home Buyer’s Guide:
https://redlionrealtygroup.com/buyer/

Selling a Home in Katy?

Taxes can matter to your buyer too.

If your home is located in a section with a different MUD or tax structure from nearby properties, accurate information matters when buyers compare monthly ownership costs.

Don’t guess at the rate or use a neighborhood-wide number.

Use the current property-specific information.

Katy Home Seller’s Guide:
https://redlionrealtygroup.com/seller/

Continue Your Katy Research

If you’re deciding where to live, start with our:

Best Neighborhoods in Katy TX: Complete 2027 Guide
https://redlionrealtygroup.com/blog/2026/08/17/best-neighborhoods-katy-tx/

If you’re considering a brand-new home, continue with:

Best New Construction Neighborhoods in Katy TX
https://redlionrealtygroup.com/blog/2026/07/21/best-new-construction-neighborhoods-katy-tx/

From there, compare our dedicated Katy guides covering:

The more specific your priorities become, the easier it is to narrow the Greater Katy market.

About Richard Luebeck

Richard Luebeck
REALTOR® | Broker/Owner
Red Lion Realty Group

I’ve called Katy home since 2003 and help buyers and sellers throughout Katy, Fulshear, Richmond and West Houston.

My goal with these local guides is to help you understand the details that can get lost when you’re looking at homes online.

With property taxes, that means going beyond:

“What’s the neighborhood tax rate?”

and determining:

“What applies to this exact property?”

Because in Katy, even two homes within the same larger master-planned community may not have the same MUD or taxing jurisdictions.

Red Lion Realty Group:
https://redlionrealtygroup.com/

Katy Home Buyer’s Guide:
https://redlionrealtygroup.com/buyer/

Katy Home Seller’s Guide:
https://redlionrealtygroup.com/seller/

Sources & Verification

Property tax rates, appraised values, exemptions, MUD rates and taxing jurisdictions can change.

Verify property-specific information using authoritative sources including:

For current property-tax information, use the exact property address whenever possible.

Last reviewed: August 2026

Final Takeaway

If you remember only one thing from this guide, make it this:

There is no single Katy property tax rate—and there may not even be one tax rate or one MUD that applies throughout an entire neighborhood.

Start with the exact house.

Identify its county.

Identify its school district.

Determine whether it’s inside a city.

Identify the specific MUD, if any.

Find the other taxing jurisdictions.

Check the current taxable value and exemptions.

And if it’s new construction, make sure the prior tax bill actually reflects a completed house.

Then estimate the real monthly cost.

That’s how you make a useful property-tax comparison when buying a home in Katy, Texas.