If you have ever searched for help protesting your property taxes, you know the landscape is confusing. Some services charge a flat fee. Others take a percentage of your savings. Some are true DIY tools. Others say "DIY" but really just hand your case to a consultant.
This is a straightforward comparison. We include ourselves. We note where competitors are stronger. According to Texas Comptroller data, the majority of property tax protests succeed in achieving some reduction, so the real question is not whether to protest but how to build the strongest evidence for the lowest cost.
We evaluated every major option based on three things that actually determine whether you win your protest: data source quality, comparable property selection, and county coverage. Everything else is secondary.
What a good protest tool actually does
Before comparing individual products, it is worth understanding what separates a useful tool from a useless one. The property tax protest process is fundamentally about evidence. You are arguing that your property's appraised value is higher than what the market supports. To win, you need comparable properties that prove it.
A good protest tool does three things well.
Evidence generation
It identifies comparable properties near your home that sold or were appraised at lower per-square-foot values. The best tools select 3-5 strong comparables adjusted for differences in size, age, condition, and location. This is the core of any successful protest.
Filing guidance
Texas has 254 counties, and protest procedures vary between them. A useful tool tells you how to file in your specific county — deadlines, iFile instructions, what forms to submit, and what to expect at the hearing. County-specific guidance matters more than generic advice.
Data quality
This is where tools diverge the most. Some pull data directly from county Central Appraisal District (CAD) records — the same certified values the appraiser uses. Others rely on estimated values from third-party algorithms. When you walk into a hearing, evidence built on CAD data matches what the appraiser has on their screen. Estimated data does not.
With those criteria in mind, here is how each option stacks up.
The tools
1. County appraisal district website (free)
Every Texas county appraisal district publishes property records online. You can look up any property's appraised value, view recent sales, compare square footage, and download property details. This is the official source that all other tools ultimately draw from.
Strengths: You are working with official data. The numbers on the CAD website are the same numbers the appraisal review board uses. There is no interpretation layer or estimation algorithm. If you know what you are doing, this is all you need.
Weaknesses: Raw data requires real analysis skills. You need to identify which properties are genuinely comparable to yours, adjust for differences in square footage and age, calculate per-square-foot values, and organize everything into a coherent argument. Most homeowners spend 4-8 hours on this process and still miss key comparables. CAD websites vary dramatically in usability — Harris County's search is relatively modern, while smaller counties can feel like navigating a 1990s website.
2. Texas Property Tax Appeal ($79 flat fee)
This is us. We built this tool specifically for Texas homeowners who want professional-quality evidence without the learning curve of doing it alone or the recurring fees of hiring a consultant.
The evidence packet includes 3-5 comparable properties selected from your county's appraisal data, a pre-written protest reason formatted for iFile, a cover letter addressed to your appraisal district, step-by-step filing instructions for your specific county, a hearing walkthrough with what to say and what to bring, deadline reminders to keep you on track, and neighborhood-level protest statistics showing how your area performs. The tool will also tell you honestly if protesting does not make sense for your property — a “don’t file” recommendation when the data shows weak signals. There is a 7-day money-back guarantee.
Strengths: Every comparable in your evidence packet comes from real CAD certified values, not estimates. The tool covers 30 Texas counties including Harris, Dallas, Tarrant, Travis, Bexar, Collin, Denton, Fort Bend, Williamson, and Galveston. The flat fee means you keep 100% of whatever reduction you achieve, with no percentage and no auto-renewal.
Weaknesses: Texas only. If you own property outside of Texas, this tool does not help. It is also a genuine DIY product — you file the protest and attend the hearing yourself. If you want someone else to handle everything, this is not the right fit. For that, see our comparison of DIY vs consultant options.
3. AppealDesk ($49 flat fee)
AppealDesk is a nationwide property tax protest tool that generates an evidence packet and cover letter for $49. It covers all 50 states, making it the broadest option on this list.
Strengths: The cheapest flat-fee option available. Nationwide coverage means it works whether you own property in Texas, California, or New Jersey. The $49 price point makes it accessible for homeowners who are unsure whether protesting is worth the effort.
Weaknesses: Breadth over depth. Covering all 50 states means the tool cannot go deep on any single state's appraisal system. For many markets, AppealDesk relies on estimated property values rather than county CAD certified data. In Texas, where the appraisal review board works directly from CAD records, presenting evidence based on estimated values can undermine your case. The filing guidance is also more generic than what you get from a Texas-specific tool.
Guarantee: AppealDesk’s Terms of Service state “All sales are final” — there is no refund if the evidence packet does not help your case. By comparison, we offer a 7-day money-back guarantee. For a detailed breakdown, see our AppealDesk comparison page.
4. Home Tax Shield ($30/year + 30% of savings)
Home Tax Shield uses a hybrid pricing model. You pay a low annual fee upfront and then a percentage of whatever tax savings they achieve. They handle the filing and hearing on your behalf, making this more of a low-cost consultant than a pure DIY tool.
Strengths: The low upfront cost removes the barrier to entry. If your protest is unsuccessful, you only lose $30. They cover more Texas counties than most competitors, and they handle the filing process for you.
Weaknesses: The 30% fee adds up quickly. On a typical $1,100 annual tax savings, you give back $330 every year. Over three years, that totals $990 in fees on top of the $90 in annual charges. What looks like a low-cost option becomes more expensive than any flat-fee tool within the first year. The auto-renewal means the percentage fee recurs annually whether or not you actively decide to protest again.
5. Ownwell (25-35% of savings)
Ownwell is not a DIY tool. They handle the entire protest process on your behalf — filing, evidence, hearing attendance. We include them here because homeowners frequently compare them to DIY options when researching their choices.
Strengths: Zero effort required from the homeowner. You sign up, authorize them to act on your behalf, and they handle everything. If they do not achieve a reduction, you pay nothing. This model works well for homeowners who genuinely do not have time or inclination to attend a hearing.
Weaknesses: Expensive over time. At 30% of a $1,100 annual savings, you pay $330 per year. Over five years, that is $1,650 in fees for a process that takes most homeowners 30 minutes with the right evidence. For a detailed cost comparison, see our Ownwell comparison page.
6. O'Connor & Associates (50% of savings)
O'Connor is the largest property tax consulting firm in Texas with more than 50 years of experience. Like Ownwell, they are full-service — not a DIY tool. They handle filing, evidence, hearings, and can pursue binding arbitration or judicial appeals if the initial protest is unsuccessful.
Strengths: Unmatched experience with complex cases. They handle commercial properties, judicial appeals, and situations where the appraisal district is genuinely difficult to work with. Their scale means they have relationships with appraisal districts across Texas and can leverage volume in negotiations.
Weaknesses: The highest fee structure on this list. At 50% of savings, you split your reduction evenly with O'Connor every year. For a typical residential home, this is difficult to justify when flat-fee tools produce comparable evidence. For a full cost analysis, see our O'Connor comparison page.
Side-by-side comparison
Here is how all six options compare across the factors that matter most. According to county appraisal district records, the quality of comparable property evidence is the single biggest predictor of protest success — not who presents it.
| Tool | Cost | Data Source | You Keep | Guarantee | Counties | DIY? |
|---|---|---|---|---|---|---|
| County CAD Website | Free | Official CAD | 100% | N/A | 1 (yours) | Yes |
| TX Property Tax Appeal | $79 flat | CAD certified | 100% | 7-day refund | 30 (TX) | Yes |
| AppealDesk | $49/yr | Mixed/estimated | 100% | All sales final | All 50 states | Yes |
| Home Tax Shield | $30/yr + 30% | CAD data | 70% | No fee if no savings | 45+ (TX) | No |
| Ownwell | 25–35% | Professional | 65–75% | No fee if no savings | Multi-state | No |
| O'Connor | ~50% | Professional | ~50% | No fee if no savings | TX (primary) | No |
The table shows a clear pattern. DIY tools let you keep 100% of your savings but require you to attend the hearing. Full-service firms handle everything but take a significant cut of your reduction every year. The decision is about how you value your time relative to the fee.
How to choose the right tool
The best option depends on what you prioritize. Here is a direct framework.
If you want the cheapest option
The county appraisal district website is free. AppealDesk is $49. Both let you keep 100% of your savings. The tradeoff is that the county website requires significant self-directed research, while AppealDesk may use estimated rather than certified values for your market.
If you want the best Texas data
Texas Property Tax Appeal ($79) uses real CAD certified values and provides neighborhood-level protest statistics. For Texas-specific protests, CAD data produces stronger evidence than estimated values because it matches what the appraiser is already working from.
If you want zero effort
Ownwell or O'Connor handle everything. You sign the authorization and they take it from there. The cost is 25-50% of your savings every year, which adds up substantially over time. For a detailed comparison of DIY vs consultant costs, see our breakdown.
If you have a complex property
O'Connor is the strongest choice for commercial properties, multi-family buildings, or cases that may require judicial appeals. Their 50-year track record and legal team handle situations that DIY tools are not designed for.
Find out if your property is over-assessed
Our free scorer checks your property against neighborhood comparables in seconds. No sign-up required.
Check Your Property FreeThe real cost over three years
One-time pricing looks different from recurring pricing when you zoom out. According to CAD records across major Texas counties, the median successful residential protest saves homeowners roughly $1,100 per year in property taxes. Here is what each tool actually costs over a three-year period at that savings level.
Three-year cost comparison (assuming $1,100/year in tax savings)
The compounding effect
Percentage-based fees compound every year. Over three years with $1,100 in annual savings, the difference between a $79 one-time fee and a 50% recurring fee is $1,571. Over five years, it is $2,671. The longer you use a percentage-based service, the more that gap widens. A flat-fee tool pays for itself in the first month of tax savings and costs nothing in subsequent years.
These numbers do not mean percentage-based services are always the wrong choice. For homeowners who genuinely cannot attend a hearing or have complex properties, the convenience has value. But for a typical Texas residential home, the math strongly favors flat-fee tools — particularly those built on CAD certified data.
Frequently asked questions
What is the best free property tax protest tool in Texas?
Your county appraisal district website is the best free option. Every Texas CAD publishes property records, sales data, and comparable property information at no cost. The tradeoff is that you have to do all the analysis yourself — finding comparables, calculating adjustments, and building your own evidence packet. For homeowners comfortable with research, it is a viable path. For those who want the analysis done for them, paid tools start at $49.
Is $49 or $79 worth it for a DIY evidence packet?
For most Texas homeowners, yes. According to county appraisal district data, the median successful protest in Dallas County reduces appraised value by roughly $29,000, saving approximately $675 per year in taxes. Either fee pays for itself in the first month of savings. The key difference between tools at these price points is data source quality. Tools using real CAD certified values produce evidence that directly matches what the appraisal review board is working from. Tools using estimated values introduce a layer of uncertainty.
What is the difference between CAD data and estimated data?
CAD (Central Appraisal District) data is the official certified value assigned by the county. This is the number the appraisal review board uses when evaluating your protest. Estimated data comes from third-party algorithms that approximate property values based on public records, listings, and statistical models. Both can be useful, but when presenting evidence at a hearing, comparables based on CAD certified values carry more weight because they match the data the appraiser is already using. There is no translation gap.
Can I protest property taxes without hiring anyone?
Yes. Texas law is explicitly designed for owner-filed protests. You can file online in most counties using the iFile system, gather your own evidence, and present your case at a hearing without professional representation. According to Texas Comptroller data, owner-filed protests with strong comparable evidence see results similar to agent-filed protests. The appraisal review board evaluates the evidence, not who presents it. For a complete walkthrough, read our step-by-step Texas protest guide.
Start with a free check
Before choosing any tool, find out whether your property is actually over-assessed. There is no point paying for an evidence packet or hiring a consultant if your appraised value is already in line with your neighbors.
Our free scorer tool compares your property against neighborhood comparables using real appraisal district data. It takes about 10 seconds. You will see your property's score, how it compares to similar homes, and whether the numbers suggest a protest is worth filing.
If the data shows you are over-assessed, our $79 evidence packet gives you professional-quality comparable data at a fraction of what consultant fees would cost over time. You keep 100% of your savings. No percentage fee. No auto-renewal. No lock-in.
For more on how the protest process works, read our complete Texas property tax protest guide. To understand key deadlines, check our deadline tracker. And to see how your county compares to others across Texas, explore our success rates by county analysis.