Property Tax Appeal Companies: What They Charge, and When DIY Wins

A company knocks, or an ad finds you: "We protest your property taxes, and you only pay if we save you money." It sounds risk-free. It is not. Here is how these firms actually price, the math that decides whether hiring one is worth it, and the honest case for doing it yourself.

The Three Ways They Charge

Nearly every property tax appeal service uses one of three pricing models. Knowing which one you are looking at changes the entire calculation.

1. Contingency: a cut of your savings

The most common model. You pay nothing upfront, and the firm takes a percentage of the tax savings it wins you. Typical contingency rates run 25 to 50 percent of the first year's savings, with 25 to 35 percent the most common range for residential appeals. Some firms base the fee on one year only; others take their percentage across two or three years of savings, which is a much bigger bill. Always ask which one before signing.

2. Flat fee: a fixed price regardless of outcome

A newer breed of service charges a set price, commonly $49 to $99 per property, to analyze your assessment, pull comparable sales, and prepare your evidence packet. You pay the same whether the reduction is large or small. If your case is straightforward, this is often dramatically cheaper than contingency.

3. Minimum fees: the trap inside contingency

Some firms pair a contingency rate with a minimum fee, something like "$150 or 40 percent of savings, whichever is higher." That minimum applies even when your savings are tiny. One company's own published example makes the point brutally: on a $500,000 home where a protest won only $100 in annual savings, a $150 minimum means the homeowner paid $150 to save $100. Net result: negative $50. Read the fine print for minimums before you sign anything.

The Math, With Real Numbers

Let us run the same appeal through all three models. Assume your protest wins a $40,000 reduction in assessed value and your effective tax rate is 1.5 percent. Your annual savings: $600.

Pricing model	What you pay	You keep (year 1)
DIY (filing is free in most places)	$0	$600
Contingency at 30%	$180	$420
Contingency at 50%	$300	$300
Contingency at 30%, multi-year (3 yrs)	$540	$60
Flat fee ($79 evidence packet)	$79	$521

Now scale it up. Say the appeal wins $1,500 in annual savings. A 25 percent contingency firm takes $375; over a three-year reassessment cycle at the same percentage, that is $1,125 in fees. A $49 flat-fee packet costs $49 total. Same reduction, same savings, and one route costs more than twenty times the other. The contingency pitch of "you only pay if we win" is real, but it is better understood as: the more they save you, the more they charge you.

None of this means contingency is a scam. For a homeowner with zero time, zero confidence, and a genuinely over-assessed property, paying $180 to keep $420 you would never have captured yourself is a good trade. The mistake is not doing the arithmetic first.

When Hiring a Company Makes Sense

I would seriously consider paying for help in these situations:

Commercial or high-value property. The dollars are bigger, the valuation methods are more complex (income approach, not just comps), and a percentage fee on a $20,000 annual reduction is money well spent. Percentages are often negotiable on large cases.

Your case is messy. Mixed-use property, unique construction, or a market with almost no recent comparable sales. A professional who does this daily knows how to build a case from thin data.

You genuinely will not do it yourself. Be honest with yourself. An appeal you never file saves you nothing. If the choice is between paying a contingency fee and doing nothing, the fee wins every time. The National Taxpayers Union estimates that only a small fraction of homeowners ever appeal, and of those who do, 30 to 50 percent win some reduction. The biggest cost is inaction.

When DIY Wins

For a standard single-family home with a clean comp set, I think most people should file themselves. Here is why.

Filing is usually free. In most jurisdictions the protest or appeal form itself costs nothing, or a nominal fee under $50. The raw material of your case, comparable sales, is public data you can pull from your county assessor's site, Zillow sold listings, and Redfin in an afternoon. I walk through the whole process in how to find comps for a property tax appeal.

The hearing is not a trial. Most residential appeals are decided in an informal review or a short hearing before a board, not a courtroom. You bring your one-page comp sheet, explain the gap between your assessment and recent sales, and answer questions. It is closer to a parent-teacher conference than a legal proceeding.

You keep 100 percent. On that $600-a-year example above, DIY keeps $600. The contingency firm keeps $180 to $300 of it. If your comps clearly show a $30,000-plus over-assessment, the case is not complicated enough to justify giving away a third of it.

The middle path exists too. If you want professional-grade evidence without handing over a share of savings, flat-fee evidence packets ($49 to $99) give you the comp analysis and filing guidance while you keep the full reduction. For straightforward cases this is, in my view, the best value in the market.

Frequently Asked Questions

How much do property tax appeal companies charge?

Most charge 25 to 50 percent of your first-year tax savings on contingency, with 25 to 35 percent most common for residential. Flat-fee services charge $49 to $99 per property. Watch for minimum fees and multi-year clauses that raise the real cost.

Do I owe the company anything if the appeal fails?

With pure contingency, no: you pay nothing if there is no reduction. With flat-fee services, you pay the fee regardless. With minimum-fee contracts, you may owe the minimum even on a tiny win, so read the agreement.

Can appealing my taxes backfire and raise my assessment?

In most states, no. Boards generally cannot raise your value above the assessor's figure because you appealed. Georgia is a notable exception where a failed appeal can result in a higher value, so review your evidence carefully there.

Is it worth appealing if I only expect small savings?

Run the numbers first. If you expect $200 a year in savings and a firm takes 40 percent with a $150 minimum, you would net $50. DIY or a flat-fee packet makes small cases worthwhile; contingency can eat them.

Do the Math Before You Decide

Whether you hire help or file yourself, start by estimating what a successful appeal is actually worth. Then check your state's filing deadline.

Calculate My Appeal Savings