The best property tax protest companies in Texas (2026)

Full disclosure: this is our product, and we're ranking it first for a specific segment, the homeowner who can spend 10 minutes filing online. If that's you, the math isn't close. The packet is $99 once, every comparable in it is a real parcel pulled from your county's own appraisal roll (13 Texas counties, including Harris, Dallas, Tarrant, Bexar, and Travis), and it arrives formatted for your county's filing process, HCAD iFile-ready in Harris County, with an unequal-appraisal argument under Tax Code Section 41.43(b)(3) built in.

Two things the full-service firms below can't say. First, you see your exact over-assessment and your actual comps free, in about 30 seconds, no signup and no email, before you pay anything. Second, you keep every dollar. On a $1,500 annual saving, the contingency firms on this list keep $375 to $600 of it, every year for the recurring ones. You'd keep all $1,500, and because Texas reassesses every year, the gap compounds each cycle you hold the lower value.

What you give up is the hand-holding. Nobody attends a hearing for you and nobody files on your behalf. If you want a firm to handle everything, pick one of the contingency services below and accept the cut. If you can file a form online, start with the free check.

Best for: Texas homeowners in our 13 covered counties who want professional-grade evidence at a flat price and will spend 10 minutes filing it themselves.

If you want a genuinely hands-off service and accept paying a percentage of your savings each year for it, Ownwell is the strongest pick on this list. It raised a $50M Series B in February 2026, reports 500K+ clients and an 86% success rate, and covers multiple states. The operation is real and at scale in a category full of small shops.

The cost is the model itself. Ownwell's fee starts at 25% of your savings in its own pricing example, and it applies again every year the service stays enrolled and wins. Save $1,500 a year and roughly $375 of it goes to Ownwell, annually, until you cancel. You also get limited visibility into which comparables were used or how your case was argued.

Best for: Homeowners who want zero involvement, value the multi-state coverage and track record, and are fine sharing 25% or more of the result every year.

O'Connor is the decades-old heavyweight of Texas protests, with real ARB and litigation experience and the capacity to handle complex commercial property most services won't touch. The no-win-no-fee structure means a homeowner who loses pays nothing, which is a genuine point in their favor.

When they do win, the cut is the largest among the major Texas options, roughly half of your first-year savings per their published residential terms. On a typical $1,155 Harris County reduction, that's about $578 to the firm. O'Connor is also currently the subject of a Texas Attorney General lawsuit (the allegations are unproven; we keep a sourced summary on our research page). High volume also means limited visibility into how your individual case was argued.

Best for: Owners of complex or commercial property, or homeowners who want a litigation-capable firm and accept giving up about half of year-one savings.

Home Tax Shield's pitch is low upfront risk: if they win nothing, you're out only the $30 setup fee. Licensed local pros handle the protest, and the service re-files automatically each season, which suits people who want to set it and forget it.

The recurring math is the catch. The 30% success fee applies every year they win, and the enrollment auto-renews until you cancel. On a $1,500 saving, that's $450 plus the setup fee in year one, and the percentage repeats annually. The $30 is also charged whether or not they save you anything.

Best for: Homeowners who want professionals on the case with minimal money at risk upfront and are comfortable with a 30% annual cut and auto-renewal.

Texas Protax has operated since 1988, one of the longest tenures in the business, with local offices in Austin and Houston and agents who sit at ARB tables for a living. If you want an experienced person physically representing you in those two metros, the experience is real.

The price of that experience is a 40% contingency, among the highest residential rates in the state, with a $50 minimum per parcel. On a $1,155 reduction that's about $462 to the firm. Residential coverage is also narrow: the Austin metro (Travis, Williamson, Hays) plus Harris County.

Best for: Austin or Houston homeowners who specifically want a veteran local agent at the hearing and accept paying 40 cents of every dollar saved.

Five Stone is an established 15-year Austin firm with a strong local reputation and claimed results well above industry averages. Because it's also a full tax practice (income tax, IRS resolution), it suits people who want one provider for everything tax-related.

Costs run high and the fine print matters: the fee is 40% of savings or a flat minimum, whichever is greater, and per BBB complaints and customer reviews, some customers report being charged even when their value wasn't reduced. Residential coverage is limited to about 7 Austin-area and DFW counties, with no residential Harris County service.

Best for: Austin-area homeowners who want a single full-service tax firm handling protests alongside their other tax work, and accept the 40% cut.

AppealDesk is the other flat-fee, file-it-yourself product on this list, and at $49 it's $50 cheaper than ours. The pricing is honest and flat, and it will generate a packet for properties anywhere in the country (it claims 50 states and 3,100 counties). If your property is outside the 13 Texas counties we cover with real roll data, it may be your only flat-fee option.

The caveat is the evidence. AppealDesk's packets are built from AI-generated estimates with no data source disclosed anywhere on the site, and its terms disclaim the accuracy of unnamed third-party sources. That question matters more in Texas than almost anywhere: Texas is a non-disclosure state, residential sale prices are not public record, so any service citing third-party sales comps here has to answer where the prices came from. AppealDesk doesn't say. It also appears to be a very small, recently launched operation (every blog post carries the same single byline), and as of June 2026 we could not find a single third-party customer review of it on Trustpilot, Google, BBB, or Reddit.

A wrong or unverifiable comp can lose your hearing. For a contested Texas protest, we believe a checkable county record beats an AI estimate, and that's the $50 difference.

Best for: Bargain hunters outside our covered Texas counties who understand the comps are generated estimates they can't independently verify.