An Industry Built on May 15
Because Texas ties your tax bill directly to an annually-set appraised value, protesting every year is rational, and an industry grew around doing it for you. The model is almost always contingency: no reduction, no fee; a reduction, and the firm keeps a percentage of your first-year savings. That "free unless we win" structure is genuinely low-risk for you. The question is only whether the percentage is worth what you could do yourself in a few hours.
What They Charge
| Model | Typical cost | Notes |
|---|---|---|
| Large traditional firms | Up to 50% of first-year savings (O'Connor, the biggest, publishes 50% for residential, reduced to 25% for clients with an over-65 exemption) | Highest percentage, most hearing manpower |
| Tech platforms | 25–35% of savings (Ownwell's published range; the exact rate is quoted per address) | Data-driven, strongest on cookie-cutter suburban homes |
| Local consultants | Commonly 30–40%, sometimes negotiable | Know the specific CAD and ARB panels |
| Flat-fee services | Roughly $79–$500 per protest | You keep all savings; you may still attend the hearing |
| DIY | $0 | A few hours; the process is designed for it |
Read the agreement for three things before signing:
- Which years you pay for. The standard deal charges on first-year savings only, but some contracts renew automatically and charge every year they protest, fine if intended, expensive if forgotten.
- The savings baseline. Reputable firms calculate savings against your noticed value. Watch for definitions that credit the firm with reductions you'd have received anyway (like the homestead cap).
- Auto-renewal and cancellation. Most firms re-protest annually until you cancel in writing. Calendar it.
The Math: When a Firm Is Worth It
Take a $450,000 home over-appraised by $40,000 at a 2% total rate: a successful protest saves about $800/year.
- DIY: keep the $800 for roughly 4–8 hours of work, comps, one-pager, a hearing. That's $100–200/hour, tax-free.
- Firm at 40%: keep $480, spend zero hours.
- Firm at 25% (over-65 rate or platform pricing): keep $600.
Three situations tilt toward hiring: high-value or unusual properties (bigger stakes, harder comps), multiple properties, and, honestly, "I'll never get around to it." A firm capturing 60–75% of savings that would otherwise be zero is strictly better than not protesting, and in Texas, where the 10% homestead cap compounds every win into future years, an annual protest subscription has real logic. If you'd rather keep it all, our step-by-step protest guide and comps guide cover the entire DIY path.
How to Vet a Texas Firm
- Check the license. Texas property tax consultants must register with the TDLR (Texas Department of Licensing and Regulation), 40 hours of training plus an exam. TDLR's site has a public license lookup; a "firm" that isn't there is a red flag.
- Ask what happens after the informal. Volume shops settle fast at the informal meeting and drop cases that need an ARB hearing, exactly where representation earns its fee. Ask for their ARB rate.
- Ask how they'll argue equity. A firm that can't explain the equal-and-uniform median comparison for your specific neighborhood is running a template.
- Success-rate ads are marketing. "90% success" counts $50 reductions as wins. The number that matters is median savings on homes like yours, ask for it.
- Never pay upfront fees to a mailer. Legitimate contingency firms charge after results; the official-looking letters demanding payment to "file your protest" or "designate your homestead" are the scam layer of this industry.
A Note for Over-65 Homeowners
Two things change at 65: your school taxes freeze (so a protest that lowers the ceiling has permanent value), and the biggest firm in the state cuts its fee to 25% for you. If a firm quotes you 50% without asking your age, mention the over-65 exemption and watch the price move, or use it as a reason to shop elsewhere. Full senior details in our Texas homestead guide.
Bottom Line
Texas protest firms are legitimate and the contingency model protects you, but the spread between 25% and 50% is enormous for identical work, and the DIY alternative is free in a state whose process was built for homeowners. Verify TDLR licensing, nail down which years you'll pay for, and run the $/hour math on your actual bill before signing. Whichever route you choose, the deadline is the same: May 15, and not protesting at all is the only losing move. County-by-county rates are on our Texas pages.