The line on your bill that is not the county

What a MUD is and why it exists

When a developer builds outside the reach of a city’s water and sewer system, somebody has to pay for the pipes, the drainage and often the roads. Under Chapter 54 of the Water Code the developer can petition to create a municipal utility district: a political subdivision with its own elected board and its own power to levy an ad valorem tax. The district issues bonds, the bonds pay for the infrastructure, and your MUD tax services the bonds.

The consequence people miss is the direction of travel. The rate is set to cover debt service on a bond issue spread across however many houses exist inside the district at the time. Early on there are few houses and a lot of debt, so the rate is high. As the subdivision fills in, the same debt is spread across more rooftops, and as the bonds are retired the debt itself shrinks. A brand-new development is carrying the highest MUD rate it will ever carry, and a twenty-year-old one may have none at all. Buying into a new MUD and assuming the rate is permanent is as wrong as buying into one and assuming it will fall on a schedule anybody promised you.

A PID is not the same thing, and the difference matters

A public improvement district is created under Chapter 372 of the Local Government Code by a city or county, not as a separate political entity. It does not levy a tax rate. It levies an assessment: a fixed amount attached to your lot as a lien when the bonds are sold, usually collected in annual installments.

That single structural difference produces every practical difference between them. A MUD rate floats with the district’s debt and the district’s tax base, so it can rise as well as fall. A PID assessment is fixed at issue and does not move with your appraised value at all — and because it is a finite sum rather than a perpetual rate, you can generally pay it off in a lump and be free of it. Nobody has ever paid off a MUD.

The seller has to tell you, and most of the trouble is that they did not

Water Code §49.452 requires a seller inside a district to give the buyer written notice of it before a binding contract of sale is executed, either as a separate document or as an addendum to the contract. If that notice is not given, the purchaser is entitled to terminate the contract — at any point up to and including the day of closing.

The exception is the trap. If the seller hands over the notice at closing and the buyer closes anyway, the buyer is conclusively presumed to have waived every right to terminate or recover under the section. A stack of paper at the closing table is exactly where this notice tends to appear, and signing it there is the moment the remedy disappears. At closing a separate copy is executed by both parties, and recorded in the county deed records.

This is worth knowing before you are at the table rather than after, which is the only reason it is on this page.

How to find out what you are actually in

Your notice of appraised value lists every taxing unit separately, with its rate. If a MUD is taxing you, it is on that notice under its own name, usually as a numbered district. That document is the authority; a listing agent’s estimate is not, and neither is any county average.

Before you have a notice — while you are still shopping — the appraisal district’s property search will show the jurisdictions for a given parcel, and the Texas Comptroller maintains a searchable list of special purpose districts and their filings. A PID assessment will often not appear on the appraisal notice at all, because it is not an ad valorem tax; it is billed separately or collected through the city, which is precisely why buyers miss it.

One more that catches people at tax time: a MUD tax is an ad valorem property tax and is treated as one. A PID assessment for capital improvements that benefit your property generally is not deductible as a property tax; it is added to your basis in the house instead. IRS Publication 530 covers the distinction.

What this does to your estimate

The calculator works from county rates, and county rates do not contain MUDs. If you are in one, add its rate to the county figure before you believe any number on this site. Every county rate we publish comes from the adopted rates of the units that cover a specific parcel — a real house in a real school district — and a district drawn around one subdivision cannot be in a county-wide figure by construction.

The county guide sets out what is in those rates and what is not.

Sources

• Texas Water Code Chapter 54 (municipal utility districts) and Chapter 49 (general provisions).
• Texas Water Code §49.452, notice to purchasers.
• Texas Local Government Code Chapter 372, the Public Improvement District Assessment Act.
• IRS Publication 530, on assessments for local benefits.