MUD taxes in Texas are property taxes levied by a Municipal Utility District, a local government entity that finances water, sewer, and drainage infrastructure in areas without city services. The tax appears as its own line on your property tax bill, sits on top of your county, school, and other local taxes, and typically runs from about $0.25 to $1.40 per $100 of assessed property value. In the fast-growing suburbs around Houston, Austin, Dallas–Fort Worth, and San Antonio, it is often the largest cost buyers fail to notice until closing.
What a Municipal Utility District Is
A Municipal Utility District is an independent political subdivision of the State of Texas with its own taxing authority. MUDs exist to pay for infrastructure in places where no city is available to build it, most often master-planned communities on the suburban edge. A developer needs water lines, wastewater treatment, and drainage in the ground before homes can be sold, and the MUD is the financing vehicle that makes that possible.
Each district is run by a board of directors elected by property owners inside its boundaries. That board approves contracts, issues bonds, and sets the annual tax rate. Because the MUD is a separate government, its taxes are separate from any city, county, or school district that also covers your address.
What MUD Taxes Pay For
MUD taxes fund two things. The larger piece, in most districts, is debt service. When a developer builds a new subdivision in unincorporated territory, the MUD issues bonds to reimburse the developer for water lines, wastewater collection and treatment, storm drainage, and sometimes roads. Property taxes collected from homeowners then retire that bond debt over time, on schedules that can run up to 30 years.
The smaller piece is operations and maintenance: running the water and sewer systems, keeping drainage working, and paying administrative, engineering, and legal costs. A MUD can only levy an operations and maintenance tax after voters within the district approve it at an election.1State of Texas. Texas Water Code 49.107 – Operation and Maintenance Tax
Some districts have expanded beyond core utilities to fund parks, recreational facilities, deed restriction enforcement, and solid waste collection.2AustinTexas.gov. Municipal Utility District (MUD) Basics Scope varies district by district.
How Your MUD Tax Is Calculated
The math works the same as any other Texas property tax: the district’s rate, expressed per $100 of assessed value, multiplied by the taxable value of your home.3Texas Comptroller. Tax Rate Calculation If your home is assessed at $350,000 and the MUD rate is $0.90 per $100, your annual MUD tax is $3,150.
The board sets the rate each year based on what the district needs for bond payments and operating costs. In a newer MUD, most of the rate goes to debt service, with a smaller slice for operations and maintenance. Newer districts with freshly issued bonds and fewer taxpayers to share the load often sit at the higher end of the range; several MUDs in Collin County carried rates of $0.77 to $1.00 per $100 of assessed value in 2025. Older districts with partially retired debt and larger tax bases run well below that.
How MUD Taxes Stack With Your Other Property Taxes
A MUD tax does not replace your other property taxes. It adds to them. A typical Texas homeowner already pays a county, a school district, and often a community college district. If the property is inside a MUD, that rate is layered on top.
Take a Collin County homeowner covered by a school district, the county, a community college district, and a MUD. The rates could look roughly like this:
- County: about $0.15 per $100
- School district: about $1.13 per $100
- Community college: about $0.08 per $100
- MUD: $0.77 to $1.00 per $100
Combined, that lands around $2.13 to $2.36 per $100 of assessed value. On a $400,000 home, total property taxes run $8,520 to $9,440 per year. Without the MUD, the same homeowner would pay roughly $5,440 to $5,520. That gap is why buyers new to Texas subdivisions are often stunned by the first tax bill.
How MUD Tax Rates Change Over Time
The rate is not fixed. Almost every MUD follows the same arc: it starts high and drifts down. Two things drive that. As bonds are paid off over their repayment period, the debt service portion of the tax shrinks. As new homes go up, the remaining debt is spread across more properties.
A MUD sitting at $1.20 in its early years can fall to $0.60 or lower once it matures. When all bond debt is retired, the debt service piece disappears entirely. The district may keep collecting a smaller operations and maintenance tax to run the infrastructure, or it may eventually dissolve or be absorbed by a nearby city.
Homes in MUD areas often carry lower purchase prices than comparable homes in established municipalities, because builders account for the higher initial tax burden when pricing lots. Whether the upfront savings pay off depends on how quickly the rate drops and how long you stay.
How to Find Out if a Property Is in a MUD
The county appraisal district’s website is the most reliable starting point. Search a property’s address and you’ll see every taxing entity that applies to it, including any MUD.
Texas law also puts a duty on sellers. Under the Texas Water Code, anyone selling property located in a MUD must give the buyer written notice before the sales contract is signed.4State of Texas. Texas Water Code Section 49.452 – Notice to Purchasers The notice discloses the district’s existence, identifies the types of facilities it funds, and explains that the property is subject to the MUD’s taxing authority. A missing disclosure is worth raising with a real estate attorney.
Your title company will also surface MUD obligations at closing. Special district tax liens should appear as exceptions in the title commitment, and a thorough title search should flag any MUD assessments attached to the property. Verify through the written title commitment and appraisal district records rather than relying on verbal assurances from anyone in the transaction.
How a MUD Affects Your Mortgage
Being in a MUD can shape your loan, not just your tax bill. Fannie Mae expects lenders to know whether a property sits in a special assessment district and to evaluate how district assessments could affect property values and marketability.5Fannie Mae. Special Assessment or Community Facilities Districts Appraisal Requirements The appraisal report has to disclose any special assessments affecting the property.
If a MUD is in severe financial trouble and there’s no comparable market data to establish property values, Fannie Mae will not purchase a mortgage secured by property in that district until an active market develops.5Fannie Mae. Special Assessment or Community Facilities Districts Appraisal Requirements That’s rare, but a distressed MUD could make it harder to sell or refinance. Ask your lender whether the MUD’s financial condition raises any concerns.
The higher combined tax rate also affects what you can qualify for. Lenders fold property taxes into your monthly housing payment when running debt-to-income. A MUD tax that adds $3,000 or more per year cuts the purchase price you can qualify for compared with the same home outside a district.
What Happens if the City Annexes the MUD
Many MUDs sit on the edge of growing cities, and annexation is a real possibility over the life of a home. When a city annexes MUD territory, the city’s tax rate generally replaces the MUD tax and the city takes over water, sewer, and other services the district had been providing.
It isn’t automatic. A city must give written consent before land within its corporate limits or extraterritorial jurisdiction can be included in a MUD in the first place,6State of Texas. Texas Water Code Section 54.016 – Consent of City and the consent agreement often addresses how annexation would work. If the MUD still has outstanding bond debt when it happens, the city typically assumes that debt or arranges for it to be paid off as part of the transition.
For homeowners, the MUD tax goes away and the city tax kicks in. Whether the total bill rises or falls depends on the city’s rate against the MUD’s rate at that moment. In a mature district with a low remaining rate, moving into a higher-tax city can actually raise your bill. In a newer district still carrying a heavy debt load, the switch can bring relief.