How to Lower Your Property Tax Assessment in Texas

Why Your Texas Property Tax Assessment Is Probably Too High

If your latest property tax bill made you do a double-take, you’re not alone. 67% of Texas homeowners say their most recent bill surprised or shocked them, up from 57% in 2025. That’s the largest year-over-year jump Ownwell has recorded in its annual survey of 520 Texas homeowners.

The reason comes down to how Texas values your home. County appraisal districts (CADs) use mass appraisal, a method that estimates the value of thousands of properties at once using broad market data. It’s efficient for the county, but it can’t account for your home’s specific condition, deferred maintenance, or micro-market shifts on your street.

Mass appraisal works well at the macro level. But when it comes to your individual home, the county’s model might miss a foundation issue that would lower your value by $40,000, or it might compare your property to homes in a subdivision with better amenities. These differences add up across millions of Texas homes.

That gap between the county’s estimate and your home’s actual market value is measurable. Across seven densely populated Texas counties, homeowners who didn’t protest had a cumulative 10.91% higher market value in 2024 than those who did. That difference equated to $2.02 billion in potential tax savings from 2022–2024.

The longer you go without challenging the county’s valuation, the wider that gap becomes. Each year’s inflated number becomes next year’s starting point, and the overcharge compounds quietly in the background.

How Your Texas Property Tax Assessment Is Calculated

Your annual tax bill in Texas depends on two factors: the appraised value set by your CAD and the tax rates set by local taxing entities like school districts, cities, and special districts. You can look up current Texas property tax rates by county to see how your area compares.

Under Texas Tax Code Section 23.01, your appraised value must equal 100% of your property’s estimated market value as of January 1 each year. The CAD determines this number, not you and not your real estate agent.

The appraised value is the starting point for your entire bill. Here’s the formula:

Appraised Value - Exemptions = Taxable Value x Tax Rate = Tax Owed

A worked example shows why even a modest reduction in appraised value matters:

That $1,000 stays in your pocket every year the lower value holds.

You cannot protest your tax rate, since it is set by elected officials and by voter-approved bonds. But you absolutely can protest the appraised value that drives your bill. That’s where the leverage is.

The Cost of Never Protesting Your Assessment

Skipping your protest doesn’t just cost you this year. It creates a higher baseline that compounds over time, and the data tells a stark story.

In Dallas County, the year-over-year difference in market value between non-protesters and successful protesters reached 6.46% by 2024, the highest of any county in Ownwell’s study. That’s not a rounding error. On a $400,000 home, 6.46% translates to roughly $25,840 in excess appraised value, or about $517 in unnecessary taxes at a 2.0% rate.

The dollar figures across Texas’s largest counties are staggering. From 2023-2025, non-protesting homeowners in Tarrant County could have saved $449 million. In Harris County, that figure was $685 million. These aren’t projections. They’re calculated from the actual valuation gaps between properties that protested and those that didn’t.

Yet most homeowners aren’t taking action. Only 32% of residential properties across 17 high-density Texas counties protested in 2025, leaving $1.2 billion in unrealized potential savings in a single year.

Each year of inaction makes the next protest harder to win because the county has an established track record of your value going unchallenged.

Homeowners who protest consistently create the opposite effect. Their lower baseline carries forward, and each successive protest builds on that foundation. Ownwell customers who protest annually see this compounding work in their favor year after year.

Skip the research. Let Ownwell build your case.

How to Protest Your Property Tax Assessment in Texas

Filing a protest is a straightforward process with zero financial risk. Under Texas Tax Code Section 41.41, the CAD cannot raise your appraised value because you filed. The worst outcome is that your value stays the same.

Despite that protection, 54% of Texas homeowners have never protested, and 37% didn’t even know they had the right to do so.

Here are the six steps to change that:

1. Review your Notice of Appraised Value (April–May): Check the property details for accuracy: square footage, lot size, number of bedrooms and bathrooms, year built. If the CAD has basic facts wrong, contact them directly to correct the errors before filing a formal protest. Factual errors alone can sometimes result in a meaningful reduction.

2. File your Notice of Protest using Form 50-132: Your deadline is May 15 or 30 days after the notice was mailed, whichever is later. We recommend checking both the “Market Value” and “Unequal Appraisal” boxes. Market value argues your home is worth less than the CAD says. Unequal appraisal argues your home is assessed at a higher rate than comparable properties in your area. Filing both gives you two separate grounds to win.

3. Request the CAD’s evidence packet at least 14 days before your hearing: This packet shows the comparable sales and data the district used to set your value. Reviewing it tells you exactly what you’re arguing against and often reveals weaknesses in the county’s case.

4. Build your case with strong evidence: The most effective evidence includes comparable sales that closed near January 1, contractor estimates for needed repairs, and equity evidence showing similar homes assessed at lower values. After processing over a million protests, Ownwell has found the difference usually comes down to three to five well-chosen comparable sales. Focus on homes that are genuinely similar to yours in size, age, condition, and location.

5. Attend the informal hearing with the CAD first: Most protests in Texas resolve at this stage. You’ll sit across from a CAD appraiser and present your evidence. Come prepared with printed copies and a clear explanation of why the county’s number is too high. Stay focused on facts and data, not emotions.

6. If unresolved, proceed to the formal Appraisal Review Board (ARB) hearing: Bring copies of all evidence for each panel member. The ARB is an independent body that reviews the CAD’s valuation and your evidence, then issues a binding decision. Note, if you disagree with the ARB’s ruling, you can pursue further options including binding arbitration or district court.

The entire process costs nothing to initiate and carries no downside. If you don’t get a reduction, your value simply stays where it was. The real cost is time, especially if you do a self-appeal or DIY protest instead of using Ownwell.

For additional guidance, see the Texas Comptroller’s property tax protest guide and Texas Law Help’s overview of the protest process.

Exemptions Lower Your Taxable Value, Not Your Assessment

Exemptions and protests serve different purposes, and you need both working together to minimize what you owe the county.

The Texas homestead exemption, expanded by the 2025 ballot measure, reduces your taxable value by $140,000 for school district taxes. If you’re 65 or older or disabled, you receive an additional $60,000, bringing the total school district exemption to $200,000, plus a tax ceiling that freezes your school district taxes at the amount you paid the year you qualified.

But here’s what exemptions don’t do: they don’t fix an inflated appraised value.

If your home is appraised at $500,000 but should be $450,000, your homestead exemption is applied to the wrong starting number. You’re still overpaying on that $50,000 gap every single year.

To claim your homestead exemption, file Form 50-114 with your CAD. The deadline is April 30, though Texas allows late filing up to two years after the deadline. You can review the full list of Texas property tax exemptions on the Comptroller’s website.

Many homeowners miss their exemption entirely in their first year of ownership. Ownwell handles retroactive homestead exemption filings for up to two prior years (the limit in Texas), recovering savings you may not have known you were leaving on the table.

The bottom line: claim every exemption you qualify for, and protest your appraised value every year. They work on different parts of the formula, and maximizing both gives you the lowest possible bill.

How Ownwell Can Help

Ownwell manages the full property tax protest process from start to finish: filing your protest, building evidence with proprietary technology and local market data, negotiating with the CAD, and attending ARB hearings on your behalf.

You don’t need to take time off work, gather comparable sales, or learn the rules of the hearing room.

Ownwell operates on contingency pricing at 25% of your first-year tax savings. If you don’t save, you don’t pay. There are no upfront costs and no hidden fees.

The results back it up.

• Ownwell customers achieve an 88% success rate with average annual savings of $774,

• We're backed by a 4.7-star rating across 3,000+ Google reviews

That track record comes from combining local tax experts who understand your county’s appraisal methods with proprietary software that identifies the strongest comparable sales for your property.

Whether it’s your first protest or your fifth, Ownwell ensures your case is built on the strongest available evidence for your county and property type. For a broader look at strategies to reduce your Texas property taxes, including exemptions and rate changes, see Ownwell’s complete guide.

Frequently Asked Questions

Can the County Raise My Assessment if I Protest?

No. Under Texas Tax Code Section 41.41, the CAD cannot increase your appraised value as a result of a protest. The worst outcome is that your value stays the same. There is zero risk to filing.

How Much Can I Save by Protesting?

Savings vary by property, but Ownwell’s research found a 10.91% cumulative gap in market value between non-protesters and successful protesters across seven major Texas counties. On a $400,000 home at a 2.0% tax rate, even a $30,000 reduction saves $600 per year.

Should I Protest Every Year?

Yes. Each successful protest establishes a lower baseline for the following year. Skipping a year gives the CAD room to push your value back up, erasing previous gains. Ownwell customers who protest annually compound their savings over time.

Do I Still Need to Protest if I Have a Homestead Exemption?

Yes. Your homestead exemption reduces your taxable value, but it does nothing to correct an inflated appraised value. If the CAD overvalues your home by $50,000, you’re overpaying on that amount regardless of your exemption status.

What Is the Deadline to Protest in Texas?

The deadline is May 15 or 30 days after the Notice of Appraised Value was mailed, whichever is later. You can file using Form 50-132 through your county’s appraisal district. Don’t wait until the last day; earlier filing gives you more time to gather evidence.

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