A five-bedroom new build in Homestead, off Crosby Creek in Schertz's 78108 ZIP code, and a similarly priced home a few miles north in one of the newer sections of 78154, can carry noticeably different annual tax bills even when the sale price on both closing statements looks nearly identical. Current tracking from Ownwell puts the median effective property tax rate in 78108 at 1.69 percent, against 1.44 percent in 78154, which works out to median annual bills of $6,156 and $4,175 respectively on homes in each ZIP.
Buyers who notice that gap almost always reach for the same explanation: Schertz is one of the few cities in the region split between two counties, Guadalupe and Bexar, so the county line must be doing the work. It is a reasonable guess. It is also mostly wrong, and the reason it's wrong matters more to a buyer's math than the county line itself ever would.
The County Portion Is Close to a Rounding Error
Guadalupe County adopted a rate of $0.3304 per $100 of value for the fiscal year that produced tax bills mailed out in January 2026. The Bexar County rate applied to the eastern slice of Schertz that falls on that side of the line runs close behind, at roughly $0.306953 per $100 for the same period. Run both through a $350,000 taxable value and the county line by itself accounts for about $82 a year, before any exemption is applied.
Layer in the rest of the stack and the picture stays tight. The City of Schertz set its own rate at $0.5118 per $100 for the same fiscal year. Most Schertz addresses, on either side of the county line, sit inside Schertz-Cibolo-Universal City ISD, which adopted a combined rate of $1.0769 per $100 after its 2025 voter-approval tax rate election failed to pass. Add city, county, and school district together and a Guadalupe-side home lands at roughly $1.9191 per $100, while a Bexar-side home with the same city and school rates lands at about $1.895653 per $100. That's a spread of a couple of cents on the dollar, not the thousands of dollars separating median bills in 78108 and 78154.
So the county line is real, and it is worth confirming for any specific address, but it isn't the mechanism producing a $2,000 gap between two ZIP codes in the same city.
What Actually Moves the Number
Two things are doing the real work, and neither one respects a county boundary.
The first is home value itself. Ownwell's tracking shows 78108 carrying the highest median home price in Schertz, at $374,786, well above the citywide median of $304,026. A higher assessed value multiplied by even an identical rate produces a bigger bill on its face, before rate differences enter the picture at all.
The second, and the one that actually explains why the effective rate in 78108 runs higher than in 78154, is what sits on top of the county-city-school stack: special assessment districts tied to specific subdivisions rather than to ZIP codes or counties. A Municipal Utility District is used to fund a subdivision's water, sewer, and drainage lines. A Public Improvement District, created under Chapter 372 of the Texas Local Government Code, works differently. Echelon Property Group describes a PID assessment as a fixed per-lot charge that does not rise with the appraisal. A PID is often used to fund the amenity package, entry monuments, and common-area landscaping in a master-planned community.
These district lines are drawn subdivision by subdivision. Two homes in the same ZIP code, in the same county, can carry different total bills depending on which platted section each one sits in.
Where That Shows Up on the Ground in Schertz
Schertz has built out enough master-planned product over the past decade that this isn't a hypothetical. Some of the names a buyer will run into while comparing options:
- The Crossvine, in 78154, Schertz's first master-planned community, built around a resort-style pool, an events pavilion, an outdoor amphitheater, and a network of hike-and-bike trails
- Homestead, in 78108, one of the newer high-volume subdivisions off Crosby Creek and Yoakum Valley
- Rhine Valley, off FM 1518 and Lower Seguin Road
- Saddlebrook Ranch, in 78154
- Mont Blanc and Parklands, both in 78108 and Guadalupe County
- Carmel Ranch, in southern Schertz near I-10 and Loop 1604
None of that list tells a buyer, on its own, whether a specific section carries a MUD or PID line. That's the point. The amenity package that makes a master-planned community attractive, the pool, the trail system, the entry landscaping, often gets financed through exactly this kind of district, and the only way to know for certain is to ask for it by name rather than assume a ZIP code or a builder's price sheet already accounts for it.
The Full Stack, Side by Side
| Taxing entity | Rate or assessment (January 2026 bills) | Applies to |
|---|---|---|
| City of Schertz | $0.5118 | All Schertz addresses |
| Guadalupe County | $0.3304 | Most of Schertz |
| Bexar County | ~$0.306953 | Eastern Schertz addresses |
| SCUCISD | $1.0769 | Most Schertz addresses |
| MUD (where present) | Varies by district | Specific subdivisions only |
| PID (where present) | Fixed per-lot assessment | Specific subdivisions only |
The first four rows are public, adopted numbers that apply broadly and differ from each other by fractions of a percentage point. The last two rows are the ones that actually explain a four-figure gap between comparable homes, and they don't appear on this table in any generalized way because they're set district by district, not citywide.
What This Means Before You Write an Offer
Every entity in that first part of the stack sets a new rate this fall. The numbers above are the ones adopted last September that produced bills mailed in January 2026. City councils, county commissioners, and school boards across the region typically adopt their next rates in September and October, which means Schertz, Guadalupe County, Bexar County, and SCUCISD are all working through that process right now. A buyer comparing two homes today should ask for the entity's current proposed or adopted rate rather than lean on last year's figure, since the gap between a proposed rate and a final adopted one can still move before a tax bill is printed.
An online estimate on a listing typically applies a citywide or countywide average and won't reflect a specific subdivision's MUD or PID line, which is why the number on a portal search and the number on a closing disclosure can land in different places. The way to close that gap before making an offer is to pull the property's actual tax certificate, which lists every taxing entity attached to that parcel by name, or to ask directly whether the subdivision carries a district assessment and what the current rate or payment schedule looks like.
Confirming which type of district applies, and whether it offers any exemption, is a five-minute question to a title company or the district itself, and it changes the real monthly number more than the county line ever will.
A quick note on timing: Ownwell says the Guadalupe County appraisal district typically mails assessment notices by mid-April each year, and any protest needs to be filed by the applicable deadline.
If you're comparing homes across Schertz's different sections and want the full tax stack pulled for a specific address before you write an offer, Lira Realty Group can walk through that math with you. Schedule a consultation.
This article is general information, not legal, tax or financial advice. Consult a qualified professional about your situation.
