Historical tax data
Texas property tax rate history explorer
Search a county, city, ISD, MUD or other special district and compare its finalized annual statewide records retained by Texas Defined. The tool is designed to answer a narrow but useful question: how did the reported tax rate for this taxing unit change over time?
Taxing unit
Find a local rate
How to read it
A tax rate is only one part of the bill
Texas property taxes are imposed by local taxing units. A single property can be inside several of them at once: a county, city, school district, hospital district, municipal utility district, emergency-services district, community-college district or another special district. This explorer follows one taxing unit at a time. It does not add every unit that applies to a particular address.
A reported rate is generally expressed per $100 of taxable value. That means a rate of 0.500000 is not a 50 percent tax. It represents fifty cents per $100 of the taxable value to which that rate applies. To estimate a real bill, you still need the parcel’s taxable value after exemptions and the rates for every applicable taxing unit.
That is why rate history and bill history can move differently. A taxing unit can lower its rate while the average tax bill rises because taxable values increased. The reverse can also happen. Use the history here to study the rate itself, then use parcel-level and appraisal records to understand the bill.
Rate components
M&O and debt service
Maintenance and operations (M&O)
M&O generally supports the ordinary operating side of a taxing unit. Depending on the type of unit, that can include personnel, services, maintenance, programs and other ongoing governmental costs. School-district rate structures are governed by additional state rules, so the label should be read in the context of that unit type.
Interest and sinking / debt service (I&S)
Debt-service rates generally support eligible principal and interest obligations. A change can reflect debt issuance, repayment schedules, taxable-value growth, refinancing, voter-approved debt or other factors. The historical rate alone does not identify the cause.
Why some records do not split cleanly
Statewide source files are assembled from many local units and years. Older records, variable-rate records or source conflicts do not always provide a clean M&O/I&S split. Texas Defined preserves the uncertainty rather than manufacturing a component that was not reliably reported.
What the tool can answer
Use it for the right question
- ✓How a specific county, city, school district or special district reported its rate across available years.
- ✓Whether a fixed reported rate increased, decreased or stayed relatively stable over the selected history.
- ✓Whether the source reports M&O, debt-service, levy or variable-rate information for a given year.
- —Whether your individual parcel was inside that taxing unit in every year shown.
- —What your actual tax bill was after exemptions, caps, freezes, prorations or parcel-specific changes.
- —Why a governing body adopted a particular rate in a particular year.
Data methodology
Why we preserve “not reported” and “variable”
The history is built from statewide Texas property-tax source snapshots retained by Texas Defined. Source files change format over time, and a taxing unit can appear under different names or with different component detail from one year to another. The matching layer uses the taxing-unit identity and type rather than pretending every text label is perfectly stable.
Records marked not reported are not treated as zero. A missing rate is missing information, not a tax rate of 0.000000. Records marked variable are likewise not collapsed into a false single number. If the source carries multiple possible rates or the rate depends on a local condition, the tool shows that uncertainty.
The comparison math only uses fixed rates that can be compared without inventing data. That is why the summary may say a net change is not comparable even when several years are displayed. This is intentional: a smaller honest dataset is more useful than a smooth chart built from assumptions.
Historical rates are statewide source snapshots. A rate history does not prove that a particular parcel was inside the taxing unit in every year shown. Annexations, deannexations, new special districts, district dissolutions and boundary changes can all alter which units apply to an address.
Next step
Turn the rate into a property-tax answer
Frequently asked questions
Rate-history questions
Does a lower rate mean my bill went down?
Not necessarily. Your bill depends on taxable value, exemptions and every applicable taxing unit. Rate compression can occur at the same time that taxable values rise.
Can I use this to prove my parcel’s past taxes?
No. Use historical tax bills, appraisal records and official parcel-level records for that. This tool tracks taxing-unit rate records, not parcel jurisdiction.
Why are six decimal places shown?
State and local source files often report rates with that precision. Keeping the source precision makes small year-to-year changes visible and avoids rounding a rate before comparison.
Why do some units have only a few years?
A unit may be new, renamed, dissolved, unmatched in an older source file, absent from a particular statewide file or represented in a format that cannot be safely normalized. We do not fill missing years with guesses.