How Property Tax Rates Are Calculated in Texas

Most Texas commercial property owners know their tax bill is too high, but few understand exactly how that number is calculated. The formula itself is deceptively simple — your appraised value multiplied by the combined tax rate — but the machinery behind each of those components is layered, opaque, and full of places where errors compound into thousands of dollars of overpayment.

This guide walks you through every stage of how Texas property tax rates come together, from the initial appraisal district valuation through the budget-setting process of each taxing unit, to the final number on your tax statement. Understanding these mechanics is not just academic. It is the foundation for identifying where your tax burden is inflated and where a protest can deliver real savings.

The Two-Part Formula Behind Every Texas Property Tax Bill

Your Texas property tax bill comes down to a multiplication problem: Appraised Value × Tax Rate = Tax Liability. But each side of that equation is determined by completely different entities through completely different processes, and most property owners only have the ability to challenge one side.

The appraised value is set by your county appraisal district (CAD), an independent entity that estimates the market value of every property in the county as of January 1 each year. The tax rate is set by each taxing unit — school districts, cities, counties, special districts — through their annual budget and rate adoption process.

You cannot protest your tax rate. That is set through a political process involving public hearings and elected officials. What you can protest is your appraised value, and because your tax bill is a direct product of that value, reducing your appraisal reduces your bill across every single taxing unit that levies taxes on your property.

For a commercial property in Harris County, for example, you might have five or six different taxing entities stacking rates on your property. A $100,000 reduction in appraised value at a combined rate of 2.5% translates to $2,500 in annual savings — and that reduction carries forward until the CAD reassesses.

How Appraisal Districts Establish Your Property’s Value

The starting point of your tax bill is the appraised value assigned by your county’s central appraisal district. Under Texas Property Tax Code §23.01, the CAD is required to appraise all property at its market value as of January 1 of the tax year. For commercial properties, this process is considerably more complex than for residential properties.

Appraisal districts use three primary methods to value commercial property:

The Income Approach is the most common method for income-producing commercial properties like office buildings, retail centers, and apartment complexes. The CAD estimates the net operating income the property could produce, then applies a capitalization rate to convert that income stream into a value estimate. The problem is that CADs frequently use market-wide cap rates and income assumptions that do not reflect the specific conditions of your property — vacancy rates, deferred maintenance, lease concessions, and operating expenses that reduce actual income below the CAD’s theoretical model.

The Sales Comparison Approach compares your property to recent sales of similar commercial properties. This method works reasonably well for standardized property types but breaks down for unique commercial assets. CADs may use comparable sales that are not truly comparable — different locations, different conditions, different property classes — inflating your value based on transactions that have nothing to do with your property’s actual market position.

The Cost Approach estimates what it would cost to replace your building, minus depreciation, plus land value. This method tends to overvalue older commercial properties because appraisal districts often underestimate functional obsolescence — the economic penalty a property suffers because its design, layout, or systems are outdated compared to what the market demands today.

Each of these methods has built-in opportunities for overassessment, which is precisely why the protest process exists under Texas law.

The Taxing Unit Budget Process: Where Rates Are Actually Set

While the appraisal district determines your property’s value, the tax rate is set by each individual taxing unit through an annual budget process governed by the Texas Tax Code. Understanding this process explains why tax rates vary so dramatically across the state and even within a single county.

Each taxing unit — your county government, city, school district, community college district, hospital district, emergency services district, municipal utility district, and any other special-purpose district — goes through the same general cycle each year:

Step 1: Certified Values. The appraisal district certifies the total taxable value of all property within each taxing unit’s boundaries, typically by late July. This certified roll becomes the denominator in the rate calculation.

Step 2: Budget Adoption. Each taxing unit prepares its annual budget, determining how much revenue it needs to fund operations, debt service, and capital projects.

Step 3: Rate Calculation. The taxing unit divides its required revenue by the total taxable value in its jurisdiction to arrive at a tax rate, expressed per $100 of value. Under Senate Bill 2 (passed in 2019) and subsequent legislation, taxing units face voter-approval rate limitations — cities and counties cannot increase their property tax revenue by more than 3.5% over the prior year without triggering an automatic election.

Step 4: Public Hearings and Adoption. If the proposed rate exceeds certain thresholds, the taxing unit must hold public hearings and, in some cases, face a voter approval election before the rate can take effect.

The result is that your combined tax rate is actually an accumulation of decisions made by multiple independent governing bodies, each with its own budget pressures and political dynamics. In a county like Dallas County, a commercial property owner might pay taxes to six or seven different entities, each contributing a portion of the combined rate.

Breaking Down a Typical Texas Commercial Property Tax Rate

To understand what drives your tax bill, it helps to see how a combined rate stacks up in practice. While rates vary significantly by location, here is a representative breakdown for a suburban commercial property in a mid-sized Texas metro:

School District: 1.00–1.40 per $100 of value. School districts are typically the largest single component of your property tax bill. Their rates include a Maintenance & Operations (M&O) component, which is compressed under state funding formulas, and an Interest & Sinking (I&S) component for bond debt. Under current law, the compressed M&O rate for most districts falls around $0.90–$1.00, with I&S adding another $0.10–$0.40 depending on outstanding bond obligations.

County Government: 0.30–0.55 per $100 of value. County rates fund the sheriff’s office, county courts, road maintenance, jail operations, and other county services. Counties with higher infrastructure and public safety costs tend to run at the higher end.

City/Municipality: 0.40–0.75 per $100 of value. City rates fund police, fire, streets, parks, water and sewer (in some cases), and general municipal operations. Not all commercial properties are within city limits — properties in unincorporated areas avoid this layer entirely.

Special Districts: 0.10–0.50 per $100 of value. This catch-all category includes hospital districts, community college districts, emergency services districts, drainage districts, and municipal utility districts (MUDs). MUDs in particular can carry surprisingly high rates in newer developments where infrastructure debt is being amortized.

When you stack all of these together, combined rates for Texas commercial properties typically range from about 1.8% to 3.2% of appraised value, depending on location. Urban properties in full-service cities with multiple overlapping districts tend to cluster at the higher end, while rural commercial properties with fewer taxing entities may see rates closer to the lower end.

The critical takeaway: because your appraised value is multiplied across all of these rates simultaneously, even a modest overassessment by the CAD cascades into significant overpayment across every taxing unit.

Why Tax Rates Vary So Dramatically Across Texas Counties

Texas has 254 counties, and the variation in combined property tax rates across them is substantial. A commercial property in a rural county like Archer County faces a fundamentally different tax environment than one in Tarrant County or Travis County.

Several factors drive this variation:

Population density and service demands. Urban counties require more extensive infrastructure — roads, public transit, water systems, emergency services — driving higher budgets and higher rates. Rural counties with smaller populations have fewer services to fund but also a much smaller tax base to spread costs across, which can push per-property rates up in unexpected ways.

School district funding formulas. Texas school finance is notoriously complex, and the state’s funding formulas interact with local property values to determine how much local tax effort is required. Districts with high property values per student (often found in areas with substantial commercial or industrial property) may have compressed rates, while districts with lower property wealth per student may levy higher rates to meet funding targets.

Debt obligations. Taxing units that have issued bonds for capital projects — new schools, road improvements, hospital expansions — carry I&S (debt service) rates on top of their M&O rates. Areas experiencing rapid growth often carry higher debt loads as they build out infrastructure to keep pace with development.

Special district proliferation. Some areas of Texas, particularly in the Houston metro and fast-growing suburban corridors, have dozens of overlapping special districts — MUDs, fresh water supply districts, levee improvement districts — each adding its own rate layer. A commercial property in one of these areas might have a combined rate 0.5% to 1.0% higher than a comparable property just across a district boundary.

Economic base composition. Counties with significant industrial or mineral wealth often enjoy lower residential and commercial tax rates because the industrial base absorbs a large share of the overall tax levy. Conversely, counties that are primarily residential with limited commercial development may push higher rates onto whatever commercial property exists.

The No-New-Revenue Rate and Voter-Approval Rate: Rate Limitation Mechanics

Texas law includes two key rate benchmarks that constrain how much taxing units can increase rates year over year. Understanding these helps you anticipate how your tax burden might shift over time.

The No-New-Revenue Rate (formerly called the “effective rate”) is the rate that would generate the same amount of property tax revenue as the prior year from properties that were on the tax roll in both years. If a taxing unit adopts this rate, existing property owners would see no change in their total tax levy — assuming their appraised values did not change. However, if total appraised values in the jurisdiction increased (due to new construction or rising appraisals), the no-new-revenue rate drops, meaning the taxing unit can collect the same total revenue at a lower rate per $100.

The Voter-Approval Rate is the maximum rate a taxing unit can adopt without triggering a voter-approval election. For cities and counties, this is generally the no-new-revenue rate plus a rate that would generate 3.5% more revenue than the prior year, plus adjustments for debt service. For school districts, the calculation is different and governed by state education funding formulas.

Here is the practical implication for commercial property owners: even when tax rates stay flat or decline slightly, your tax bill can still increase if your appraised value goes up. The appraisal district’s valuation is the variable you can control through the protest process, and it is the single most impactful lever for managing your property tax expense.

This is exactly why understanding the relationship between rates and values matters — and why protesting your value is the actionable step available to you under Texas Property Tax Code §41.41.

Filing Deadlines and the Protest Window

If you have reviewed your appraisal and believe your commercial property is overvalued, Texas law gives you a clear window to challenge that value. The standard deadline for filing a Notice of Protest is May 15 or 30 days after the appraisal district mails your notice of appraised value, whichever is later.

For most commercial property owners, the process follows this timeline:

January 1: The valuation date. Your property’s market value is assessed as of this date.

April 1–15: Most appraisal districts mail notices of appraised value to property owners, showing the proposed value for the tax year.

May 15 (or 30 days after notice): Deadline to file a Notice of Protest with your county appraisal district. This is filed on a standard form and can typically be submitted online, by mail, or in person.

May through August: Informal settlement conferences and Appraisal Review Board (ARB) hearings are scheduled. Many commercial protests are resolved at the informal stage when the property owner or their representative presents evidence of overvaluation.

Late summer/fall: Tax rates are adopted by each taxing unit, and tax bills are mailed — typically in October or November.

Missing the filing deadline forfeits your right to protest for that tax year. There are limited exceptions for properties where the notice was never mailed or where a significant error occurred, but in general, the May 15 deadline is firm.

For a detailed walkthrough of the entire protest process from filing to resolution, see our complete guide to the Texas commercial property tax protest process.

How Overassessment Inflates Your Tax Bill Across Every Rate Layer

The compounding effect of overassessment is something many commercial property owners underestimate. Because your appraised value is the base that every taxing unit multiplies by its own rate, even a 10–15% overassessment translates into significant dollar amounts.

Consider a commercial property appraised at $2 million in a jurisdiction with a combined tax rate of 2.6%. The annual tax bill is $52,000. If the property’s true market value is $1.7 million — a 15% overassessment — the corrected tax bill should be $44,200. That is $7,800 per year in overpayment, and that overpayment is distributed across every taxing unit: the school district collects too much, the county collects too much, the city collects too much, and every special district collects too much.

Common sources of overassessment for commercial properties include:

Stale income assumptions. The CAD may be using rental rates, occupancy levels, or expense ratios from two or three years ago that do not reflect current market softness, tenant concessions, or rising operating costs.

Inappropriate comparable sales. The sales comparison approach can overvalue your property if the CAD uses sales of properties that are newer, better located, or in better condition than yours.

Inadequate depreciation. The cost approach often fails to account for functional obsolescence — features of your building that reduce its market appeal relative to newer competition, such as outdated HVAC systems, inefficient floor plans, insufficient parking ratios, or lack of modern amenities.

Failure to consider property-specific conditions. Environmental issues, deferred maintenance, easement encumbrances, access limitations, and other factors specific to your property may not be reflected in the CAD’s mass appraisal models.

Each of these factors is a legitimate basis for protest under Texas law, and the evidence you present at your informal hearing or ARB hearing can directly address these valuation errors.

How LowerMyCommercialTax.com Helps You Reduce Your Tax Burden

At LowerMyCommercialTax.com, we handle the entire property tax protest process for Texas commercial property owners on a contingency basis — you pay nothing unless we achieve a reduction. Here is how our process works:

Step 1: Property Review. We analyze your property’s current appraisal, comparing it against market data, income metrics, and comparable sales to identify overassessment.

Step 2: Evidence Compilation. We build a comprehensive evidence package tailored to your property type and county — income analysis, comparable sales data, cost approach adjustments, and any property-specific factors that support a lower value.

Step 3: Filing. We file your Notice of Protest with the appraisal district before the deadline, ensuring your rights are preserved.

Step 4: Negotiation. We represent you at the informal settlement conference, presenting evidence directly to the appraisal district’s commercial appraiser. The majority of our cases are resolved at this stage.

Step 5: ARB Hearing. If informal settlement does not achieve a satisfactory result, we represent you before the Appraisal Review Board, presenting your case with the same evidence standards used in formal proceedings.

Our fee structure is straightforward: we charge 30% of the first-year tax savings achieved through the protest. If we do not reduce your appraised value, you owe us nothing. This model aligns our incentives directly with yours — we only succeed when you save money.

We work with commercial property owners across all Texas counties, from high-volume metro counties like Bexar County and Collin County to smaller rural counties where overassessment is just as common but often goes unchallenged.

What Happens After Your Value Is Reduced

A successful protest reduces your appraised value for the current tax year, and that reduction flows through to every taxing unit’s calculation of your tax liability. But it is important to understand what happens in subsequent years.

The appraisal district is not bound by the prior year’s settled value. Each January 1, they reassess your property and can raise the appraisal back up if they believe market conditions support a higher value. This is why many commercial property owners protest annually — not because the CAD is doing anything wrong per se, but because the mass appraisal system consistently trends toward overvaluation for commercial properties that have specific conditions or income challenges that the broad-brush model does not capture.

Texas does offer a 10% appraisal cap for homesteads, but no such cap exists for commercial properties. Your commercial property’s appraised value can increase by any amount from one year to the next, making annual monitoring and protest a critical part of managing your property tax expense.

Additionally, if you disagree with the ARB’s final determination, you have the right to pursue further appeal through binding arbitration (for properties appraised under $5 million) or district court litigation. These options add cost and time but can be warranted for high-value properties where significant dollars are at stake.

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About the Author

Mike VanVickle is the founder of LowerMyCommercialTax.com, helping Texas commercial property owners reduce their tax burden through professional protest representation. With deep expertise in Texas property tax law and appraisal district processes, Mike and his team have helped property owners across all 254 Texas counties achieve meaningful reductions on a contingency basis — no savings, no fee.

Sources & References

• Texas Comptroller of Public Accounts — Property Tax System Basics
• Texas Property Tax Code, Title 1, Subtitle D — Tax Code §23.01 (Appraisals Generally)
• Texas Property Tax Code — Tax Code §41.41 (Right to Protest)
• Texas Property Tax Code — Tax Code §26.04 (Submission of Roll; Tax Rate Calculation)
• Texas Taxpayers and Research Association — Property Tax Reports

This guide was last reviewed and updated on May 4, 2026. Tax rates, deadlines, and procedures are subject to change. Consult your county appraisal district for the most current information.