If you are pricing a home in Trinity Falls, the master-planned community in McKinney, Texas, there is a line in the tax picture that surprises a lot of buyers: the MUD tax. It is not hidden, but it is often missing from the quick price comparisons buyers make between a new community like Trinity Falls and an older McKinney neighborhood. Here is what it is, what it costs, and how to plan for it.

What a MUD is

A MUD is a municipal utility district — a local government district that provides utility services to a defined area and finances that area’s infrastructure. Trinity Falls is served by two of them: McKinney MUD No. 1 and McKinney MUD No. 2.

One clarification that matters when you are comparing communities: Trinity Falls uses a MUD, not a PID (public improvement district). The two are sometimes discussed as if they were interchangeable. They are different mechanisms, with different structures, and a buyer comparing a MUD community against a PID community should compare the actual rates and terms of each rather than assume they work the same way.

What the MUD tax costs in Trinity Falls

The combined MUD tax rate in Trinity Falls commonly runs about $0.70 to $1.00 per $100 of assessed value, depending on which phase of the community the home is in. That rate is layered on top of the regular city, county, and school-district property taxes — it does not replace any of them.

Because the tax is ad valorem, it scales with the assessed value of the home. To make the range concrete, here is an illustration on a home assessed at $500,000:

• At $0.70 per $100: $3,500 per year
• At $1.00 per $100: $5,000 per year

That is roughly $292 to $417 per month, and it is a real part of the cost of owning in the community. For context, new homes in Trinity Falls are priced from the high $300s by the builders, with some current listings in the $499,990–$669,990 range, so a $500,000 assessed value is a realistic middle case. The illustration above is just that — an illustration using the commonly reported rate range. The rate that applies to a specific lot depends on its phase, so confirm the exact district and rate for any home you are seriously considering.

The MUD tax is also separate from HOA dues. HOA dues in Trinity Falls run about $1,200 per year as a builder estimate, varying by section and phase, and they pay for different things.

Why a new community has a MUD

When a community of this scale is built — Trinity Falls covers 2,000 acres, with 450 acres of open space, a 350-acre park, and a plan for roughly 5,000 homes — the water, sewer, drainage, and related utility infrastructure has to be built before or alongside the homes. A MUD finances that infrastructure by issuing bonds, and the MUD tax is how those bonds are repaid over time.

Two practical consequences follow from that structure:

• The tax is part of your payment from day one. MUD taxes are escrowed as part of the mortgage payment, like other property taxes. When you estimate a monthly payment on a Trinity Falls home, the MUD portion belongs in that estimate, and it affects the total payment and the debt-to-income calculation on the loan.
• The rate typically declines over time. As district bonds are repaid over the decades, MUD taxes typically decline. A young community with fresh infrastructure debt generally carries a higher MUD rate than a mature one whose bonds are closer to paid off.

What buyers should do

• Ask which district and rate apply to the specific lot. Because the rate varies by phase, the number for one street may not be the number for another.
• Read the MUD notice. Texas law requires sellers to deliver the statutory MUD notice to buyers (Texas Water Code §49.452). It discloses the district and its tax information for the property — ask for it early, not at closing.
• Run the payment with the MUD included. A payment estimate built only on principal, interest, and the base taxes will understate the real monthly cost of a Trinity Falls home by several hundred dollars.

Planning a purchase in Trinity Falls

Payment questions on a Trinity Falls home — including how the MUD tax for a specific phase factors into the monthly payment — are part of what a local loan officer works through with buyers. Eric White of Fairway Independent Mortgage, NMLS 8622, is Trinity Falls’ verified loan officer on Neighborhood Registry. See his profile at https://neighborhoodregistry.com/experts/eric-white/, read the neighborhood guide at https://neighborhoodregistry.com/living-in-trinity-falls-mckinney/, and check the sourced facts at https://neighborhoodregistry.com/trinity-falls-mckinney-real-estate-facts/.

Frequently asked questions

Is the Trinity Falls MUD tax in addition to regular property taxes?

Yes. The combined MUD rate of about $0.70–$1.00 per $100 is layered on top of city, county, and school-district taxes.

How much is the MUD tax on a $500,000 home?

Using the commonly reported rate range, about $3,500 to $5,000 per year. The exact amount depends on the home's assessed value and the rate for its phase of the community.

Does the MUD tax go away?

MUD taxes typically decline over decades as the district's bonds are repaid. They are a long-term feature of owning in the community, not a one-time fee, so plan for them as an ongoing cost that is highest in the community's earlier years.

Is a MUD the same as a PID?

No. Trinity Falls is served by McKinney MUD Nos. 1 and 2 — municipal utility districts, not a public improvement district. The mechanisms are different, so compare actual rates and terms when weighing communities that use each.

Will I be told about the MUD before I buy?

You should be. Texas law (Water Code §49.452) requires the seller to deliver a statutory notice about the MUD. If it has not been provided, ask for it.