The best property tax protest companies in Houston, compared
Five of these six companies keep 25% to 50% of what they save you. One charges $99 a year. Here are all seven ways to protest your HCAD value, with every fee taken from the company's own website.
By the Texas Property Protest team at The Ambrose Group. Fees checked September 30, 2026.
We're on this list, and we ranked ourselves first.
Texas Property Protest is our service. So every competitor fee links to the page we took it from, the ranking rule is one number you can check, and there's a section on when another option beats ours.
All seven, side by side
What you pay, what it costs on a $1,000 cut in your tax bill, and who handles the hearing.
Houston property tax protest options compared
Option
What you pay
On a $1,000 cut
If it saves nothing
Who goes to the hearing
Texas Property Protest
$99 a year, or $12 a month
$99
$99
A person on our team, named before you sign
Ownwell
25% to 35% of savings
$250 to $350
$0
Ownwell's licensed agents
Home Tax Shield
$30 a year plus 30% of savings
$330
$30
Home Tax Shield's tax experts
Rainbolt & Co
40% of savings under $1M market value
$400
$0
Rainbolt's licensed consultants
Texas Protax
40% of tax savings, $50 minimum
$400
$50 minimum may apply
Texas Protax
O'Connor & Associates
Half of first-year savings
$500
$0
O'Connor's consultants
Do it yourself on HCAD iFile
Free
$0
$0
You
Fee math only. Nobody can promise a reduction, and a real protest can save more than $1,000, less, or nothing. Fees change, so check each company's linked page before you sign.
What each one keeps from a $1,000 cut
Texas Property Protest$99
Ownwell$250 to $350
Home Tax Shield$330
Rainbolt & Co$400
Texas Protax$400
O'Connor & Associates$500
Where the flat fee wins. $99 costs less than a percentage once a protest cuts your bill by more than:
$198 against O'Connor's half
$230 against Home Tax Shield's $30 plus 30%
$248 against Rainbolt's and Texas Protax's 40%
$283 to $396 against Ownwell's 35% to 25%
The rankings
Ranked for a homeowner who wants someone else to handle the protest, by what each company keeps from a $1,000 cut. How we ranked.
1
Texas Property Protest
Best for: a flat price, and a person you know by name
Fee
$99 a year paid upfront, or $12 a month. It renews each year. The price is the same whatever the protest saves.
What you get
A person on our team files your protest with HCAD before the deadline and goes to your hearing. You'll know your contact person before you sign anything. Harris County homes only.
The catch
You pay the $99 in a year the protest saves nothing, and on a small cut a percentage can cost less. When another option beats ours.
Best for: owners with property in more than one state
Fee
25% to 35% of your tax savings, depending on location. Ownwell's own fee example uses 25%. Nothing upfront, and nothing in a year it saves you nothing.
What you get
Ownwell's licensed agents prepare the evidence and handle the hearing. Its help center asks clients to leave the hearing to them. It covers Texas and several other states, and publishes an 88% success rate and $774 average savings. Those are Ownwell's own figures.
The catch
The percentage is charged on the savings each year it appeals. At 25%, that's $250 of a $1,000 cut.
Best for: a Houston firm that also handles commercial property
Fee
40% of your savings for property under $1 million in market value, and 35% from $1 million to $3 million. No reduction, no fee.
What you get
Licensed Texas consultants handle the protest end to end, including Appraisal Review Board hearings. Service continues each year until you tell them to stop.
The catch
At 40%, $400 of a $1,000 cut. Its agreement charges 1.5% a month on invoices unpaid after 30 days.
Best for: a Texas-only firm that serves Greater Houston
Fee
For homes, the greater of 40% of your tax savings or a $50 minimum per parcel. On a capped home it can instead charge $2.50 for each $1,000 cut in market value, if that's greater. One fee, billed at year end.
What you get
It handles the whole process, and claims a 95% success rate. That's Texas Protax's own figure.
The catch
40% ties Rainbolt for the highest home rate here. Its FAQ says a protest can lower market value without lowering a capped bill, and it charges for those market value cuts too, with a minimum on most properties.
Best for: complex or commercial property, and cases headed to arbitration or court
Fee
Half of your first-year tax savings. No fee unless it reduces your taxes.
What you get
It files the protest, prepares the evidence, attends the informal and formal hearings, files for binding arbitration and coordinates court appeals. It says its clients saved over $213 million in 2025.
The catch
The biggest share on this list: $500 of a $1,000 cut.
Best for: owners with an evening to spare and a few recent sales to point to
Cost
Free. Texas law gives every owner the right to protest.
How it works
Your notice shows your account number and iFile number in the upper right corner. File at owners.hcad.org. Check the iSettle box and give your opinion of value, and an HCAD appraiser reviews it and emails you a decision, with the comparable sales HCAD used. Accept it, or reject it and go to a formal Appraisal Review Board hearing.
Your cut is small. Below about $396, 25% of it costs less than $99.
The protest wins nothing. Ownwell, Rainbolt and O'Connor charge $0 in that year, and Home Tax Shield charges its $30. We charge $99 either way.
Your home's value is capped. With a homestead exemption, the appraised value HCAD taxes can't rise more than 10% a year. When market value sits well above that capped value, a protest can cut the market value and leave the bill where it was.
You'll do the work. HCAD's iFile is free.
Your property is outside Harris County, or it's commercial. We only file with HCAD, for homes.
Got an email from us? That wasn't random.
Before we write, we check your home against HCAD's own numbers. HCAD raised its value this year, no protest was filed on it, and its market value sits close enough to the value HCAD taxes that a lower number can reach your bill. That's the setup where a protest has room to clear the $99. What HCAD decides is still up to HCAD.
How we ranked
One number: what each company keeps from a $1,000 cut in your tax bill. Lower ranks higher. A tie goes to whoever charges less in a year that saves nothing, which puts Rainbolt ahead of Texas Protax. Ownwell is ranked on the 25% in its own fee example.
Every fee comes from the company's own website on September 30, 2026, and each one links to that page. We didn't use star ratings or reviews, and we didn't count any company's claims about its own results. Those are marked as the company's figures.
The free route sits outside the ranking, because you do the work yourself.
Questions
When is the Harris County protest deadline?
May 15, or 30 days after HCAD mails your notice, whichever is later.
Do I need a company to protest?
No. Any owner can protest, and HCAD's iFile is free. A company sells its time, its evidence work and a seat at the hearing so you don't need one.
How does a company file for me?
You sign Form 50-162, the Texas Comptroller's Appointment of Agent for Property Tax Matters. It lets the company act for you with HCAD.
Yes. Your notice shows two values. The market value is what HCAD thinks your home was worth on January 1. The appraised value is what gets taxed, and with a homestead exemption it can't rise more than 10% a year. A protest that lowers the market value only moves the bill once the market value drops below the capped appraised value.
Why did I get an email from you?
Your home passed a check on HCAD's own numbers first: HCAD raised its value this year, no protest was filed on it, and its market value is within 10% of the value HCAD taxes, so a lower number can show up on the bill. We only write to homes that pass. Nobody can promise what HCAD decides.
What does Texas Property Protest cost?
$99 a year paid upfront, or $12 a month. It renews each year, and the price is the same whatever the protest saves.
Who runs Texas Property Protest?
The Ambrose Group. Texas Property Protest is a service of The Ambrose Group, a private company, and its team files your protest and goes to the hearing. We're not part of HCAD or any government office.
Want the flat fee for 2027?
The 2026 deadline has passed. Join the list and we'll reach out before HCAD mails the 2027 values.