How to appeal property taxes without hiring a contingency firm

Last updated 2026-07-09

Why skip the contingency firm and do this yourself?

Contingency property tax firms typically charge 25 to 40% of your first year's tax savings ^[1]. Say your assessment drops $50,000 and your local rate is 1.2%. That's $600 a year off your bill, and the firm takes $150 to $240 of it up front. Every year after, you keep the full $600. The math on doing it yourself gets obvious once you see what the process actually looks like.

It's not complicated. Every U.S. jurisdiction gives property owners a formal right to contest an assessment. The paperwork is usually one page. The first hearing is a conversation with a review officer, not a courtroom. You are not squaring off against a lawyer. You're handing comparable sales data to someone whose job is to close disputes fast.

Firms make money on volume. They file hundreds of appeals with boilerplate packets. A homeowner who spends four hours pulling real comps from the county's own records often walks in with a stronger case than the form letter a firm submits.

Nobody has clean nationwide data on DIY win rates specifically. The closest published figure comes from the Lincoln Institute of Land Policy, which found that across jurisdictions tracking appeal outcomes, roughly 50 to 70% of residential appeals produce some reduction when the owner shows up with evidence ^[2]. Read that phrase again: shows up with evidence. Filing empty-handed is a coin flip. Filing with three to five comparable sales that undercut your assessed value is a different game.

What is the deadline to appeal a property tax assessment?

Miss this and nothing else matters. Deadlines vary by state and sometimes by county, and they rarely bend. Most jurisdictions give you 30 to 90 days from the date printed on your assessment notice to file a protest ^[3]. A handful run on calendar-year deadlines, meaning you file by a fixed date no matter when the notice arrived.

Here are representative deadlines for major states and counties. Confirm yours at your local assessor's office before you do anything else.

Jurisdiction	Typical Appeal Deadline	When Clock Starts
Texas (most counties)	May 15 or 30 days after notice, whichever is later [4]	Notice mailing date
California (most counties)	September 15 to November 30 annual window [5]	Fixed calendar window
New York City	March 1 (tentative roll) [6]	Fixed calendar date
Illinois (Cook County)	30 to 35 days after publication of assessment [7]	Township publication date
Georgia	45 days after assessment notice [8]	Notice date
Minnesota	April 30 or 30 days after notice [9]	Earlier of the two dates

Already missed the formal deadline? Check whether your state runs a late-filing or equalization board process. Some do. Some don't. In most states, missing the window means you wait for next year's cycle.

Set a reminder the day any assessment notice lands. Open it. Read the deadline. Write it down somewhere physical. That single step beats everything else in this article.

How do you know if your property is over-assessed?

Run the simplest check first. What did similar homes nearby actually sell for in the past 6 to 12 months, and does your assessed value track those prices? Most assessors target market value, so your assessed value should roughly match what a willing buyer would pay a willing seller. If your assessment sits above recent comparable sales, you have a case.

Second check: your assessment ratio. Many states don't assess at 100% of market value. They apply a fractional ratio, say 80% or 60%. Your state's department of revenue or equalization board publishes the official ratio ^[3]. Divide your assessed value by that ratio to get your implied market value, then compare it to comps. If the implied number sits above what the home would actually fetch, file.

Third check: equity. This asks whether your property is assessed higher than truly comparable properties that haven't sold recently. Pull three to five neighbors' assessments from public records (most are online now). If a house that's larger, newer, or in better shape carries a lower assessment than yours, that's an equity argument, and it's often a strong one.

Don't go by feel. Assessors make math errors: wrong square footage, wrong bedroom count, wrong lot size, wrong construction grade. Pull your property record card from the assessor's office and read it line by line. One bad data point can swing an assessment by tens of thousands of dollars, and it usually gets corrected the moment you point it out.

What evidence actually wins a property tax appeal?

The gold standard is recent comparable sales, called comps. You want properties that sold on the open market (no foreclosures, no family transfers) within 6 to 12 months of your assessment date, as close to your home as possible, with similar square footage, age, and condition. Three to five strong comps beat ten weak ones every time.

Where to find them: your county assessor's website often has a searchable sales database. Zillow and Redfin show recent sale prices. The MLS is the most complete source if you can get to it through a real estate agent you know. Pull the sale price, sale date, address, square footage, and any condition notes.

For each comp, calculate price per square foot. Apply that to your home's square footage. If the implied value lands meaningfully below your assessment, put the calculation on paper and bring it.

Beyond comps, you can bring a licensed appraisal. A residential appraisal costs $300 to $600 in most markets ^[10]. It carries weight because it's a third-party professional opinion. Worth it or not depends on the money at stake. If your assessment is $30,000 too high and your rate is 1.5%, you save $450 a year. The appraisal pays for itself in about a year, and the savings keep coming after that.

Condition photos matter too, especially when the assessor's records grade your property "good" or "excellent" and it isn't. Damaged roof, aging systems, foundation trouble, deferred maintenance: document all of it with dated photos and contractor repair estimates.

When you build your packet, structure helps. TaxFightBack's DIY appeal kit has templates for comp grids, property record card reviews, and the equity analysis worksheet, so that's one less thing to build from zero.

Here's what reviewers notice in the first ten seconds: homeowners who hand over organized, numbered exhibits instead of a stack of printed Zillow pages. Clean presentation signals you did the work.

How does the actual property tax appeal hearing work?

Most residential appeals move through two stages: an informal review and a formal hearing. Many cases settle at the informal stage, which is a 10 to 20 minute conversation with an assessor's staff member or an appraisal review board (ARB) member.

At the informal review, you present your evidence, the reviewer checks the assessor's data, and both sides look for a number they can live with. Be specific. Skip "I think my house is worth less." Say "three comparable sales within a half-mile that closed in the last eight months imply a market value of $X, which is $Y below my current assessment." Then hand over the comp grid.

If the informal review doesn't land somewhere acceptable, you go to the formal hearing. This is a panel (usually three members) that hears both sides, asks questions, and issues a decision. Texas calls them Appraisal Review Boards ^[4]. California calls them Assessment Appeals Boards ^[5]. New York runs Tax Commission hearings ^[6]. Different names, similar structure.

Burden of proof matters at the formal stage. In most states the assessor's value is presumed correct, so you have to bring evidence strong enough to overcome that presumption. This does not mean you need a lawyer. It means your comp evidence has to be credible and specific, not a general gripe about the market.

Bring two copies of everything: one for the panel, one for you. Speak in numbers, not feelings. "The property at 114 Elm Street, 0.3 miles away, sold for $287,000 in March 2025. It has 200 more square feet than mine and a renovated kitchen. My assessed value of $340,000 implies a market value of $425,000 at the county's 80% ratio. That's $138,000 above the comparable evidence." That sentence wins reductions.

What happens if you lose the hearing?

Losing at the informal or ARB level is not the end. Every state has a next level, usually a state tax court or district court. In Texas you can take a case to district court after an ARB denial ^[4]. In Illinois you can appeal to the Property Tax Appeal Board (PTAB) ^[7]. In California you petition the Assessment Appeals Board and then Superior Court ^[5].

State court is where hiring an attorney on a flat-fee or hourly basis starts to make sense over a contingency firm. The contingency percentage gets harder to justify at that stage, because the firm's work is nearly identical to the hearing stage while any partial reduction you already locked in shrinks the base they calculate their cut on.

Most residential appeals settle before court, though. If you lost outright at the hearing, ask the reviewer point-blank what evidence would have changed the outcome. Some jurisdictions allow a reconsideration request if new evidence surfaces. Others don't. Know which one you're in.

One more angle: if your appeal failed but the process itself looks procedurally flawed (improper notice, wrong assessment date, a math error in the assessment roll), those are separate grounds. Courts take them seriously, and they're often easier to prove than a valuation fight.

Are there property tax exemptions you might be missing instead?

Before you run the full appeal, check your exemption status. A missed exemption you qualify for is one of the most common and most fixable reasons a tax bill runs high.

The homestead exemption cuts the taxable value of a primary residence by a fixed dollar amount or percentage. In Texas, the standard homestead exemption is $100,000 off the school district assessment as of 2023 ^[4]. Florida's is $50,000 ^[11]. California's is $7,000 off assessed value, a smaller benefit than it sounds given Prop 13 ^[5].

Senior exemptions, disability exemptions, veteran exemptions, and circuit breaker programs exist in nearly every state. Most carry income limits and require an application, sometimes once, sometimes annually. They are not automatic. The assessor does not enroll you. You file.

Owned your home for a few years? Go back and check whether you filed for the homestead exemption when you moved in. Many counties let you claim it retroactively for two to three years if you missed it. Call the assessor's office directly. That five-minute call can recover hundreds of dollars a year.

For county-specific exemption details in major markets, the cook county tax assessor tax bill and gwinnett county tax assessor pages cover local filing requirements in detail.

How do you file a property tax protest form?

The protest form is almost always on your county assessor's or appraisal district's website. In Texas, the standard form is Form 50-132 from the Texas Comptroller, though each appraisal district also accepts its own version ^[4]. In California, the Board of Equalization provides the base form (BOE-305-AH), but you file it at your county assessor's office ^[5].

Most forms ask for your name and contact information, the account or parcel number, the assessed value you're disputing, the grounds for protest (unequal appraisal, over market value, exemption denied), and sometimes a requested value. You don't have to name a specific dollar figure in most jurisdictions, and some advisors argue leaving it open gives you more room at the hearing.

File by certified mail if you're close to the deadline, so you have a postmark record. Many jurisdictions now take online filing. Either way, keep a copy of everything you send.

A practical tip: in states that let you request an informal meeting before the formal hearing, always take it. That meeting often ends the appeal on its own. You don't have to lock in a formal position, so you hear the assessor's reasoning and adjust before the high-stakes hearing.

For jurisdiction-specific filing steps in large markets, see the los angeles county property tax and bexar county tax assessor guides.

What does a DIY appeal actually cost in time and money?

Here's the honest estimate. Gathering evidence takes 2 to 4 hours if you're working from online public records. Building the comp grid and prepping exhibits takes another 1 to 2 hours. The informal or formal hearing takes half a day, sometimes less.

Hard costs: filing fees, where they exist, run $0 to $75 for residential appeals in most jurisdictions ^[3]. A professional appraisal, if you want one, costs $300 to $600 ^[10]. Total out of pocket without an appraisal is usually under $100, often zero.

Now the firm comparison. Your annual bill is $8,000, and a firm gets a 10% reduction ($800 a year). They charge 30% of that first year's savings: $240. Do the same work yourself in 5 to 6 hours and you keep the $240. That's the firm saving you roughly $40 an hour, which is fine if your time is genuinely worth more. Most firm contracts bill the fee on the first year only, so the real cost is that one hit, not a recurring drain. But if your assessment is off by a bigger number and you have the hours, DIY wins the economics almost every time.

The people who genuinely need a contingency firm have complex commercial properties, multiple parcels, or situations that require industrial appraisals. For a single-family home, you almost never do.

Can you appeal your property taxes every year?

Yes. In most jurisdictions you can file every year the assessment cycle opens. Whether it's worth doing depends on one thing: is the assessed value still above market value?

In states with annual reassessment (Texas, Georgia, most of the Midwest), the value resets each year, so every year is a fresh argument. In California, Proposition 13 caps annual increases at 2% unless there's a change of ownership or new construction, so the appeal opening mostly shows up when you first buy or when the market drops below your assessed value ^[5]. California's Prop 8 process lets you temporarily lower your assessment when market value falls under the Prop 13 factored base year value.

Some jurisdictions limit how soon you can re-appeal the same property. Texas allows annual protests but restricts how much a value can move between years in certain circumstances under HB 394. Check your state's specific rules.

Win a reduction in year one? Confirm the lower value carries forward in the assessor's records. It usually does, but mistakes happen. Read next year's notice and compare it to the value you agreed to at your hearing.

For state-specific annual cycles, the montgomery county property tax and hennepin county property tax pages walk through how reassessment timing works in those jurisdictions.

What common mistakes kill DIY property tax appeals?

Missing the deadline is number one, and in most states it's not recoverable. Everything else on this list is at least partly fixable.

Using a Zestimate as your evidence is a close second. Automated valuation models aren't admissible as independent evidence in most hearings, and reviewers dismiss them on sight. Bring actual recorded sales.

Bringing comps that aren't actually comparable. A three-bedroom ranch and a two-story Victorian are not comps just because they share a street. Match bedroom count, bathrooms, square footage, lot size, age, and condition as closely as you can. When your comps are imperfect, name the differences and adjust up or down for them rather than hoping the reviewer misses it.

Skipping the property record card. The card shows how the assessor coded your condition, grade, square footage, and features. If any of that is wrong, it's often your strongest argument, and it takes two minutes to spot once the card is in front of you.

Getting emotional at the hearing. Reviewers hear complaints about unfairness all day. They respond to math. "I feel my house is worth less" lands nothing next to "three arm's-length sales in the past nine months bracket my home between $290,000 and $310,000, and my assessed value of $385,000 falls outside that range by $75,000."

Taking a small informal offer without checking whether the formal board would give you more. You can always decline the informal offer and proceed. It doesn't bind you. Know that going in.

And the quiet one: not filing at all because the process feels intimidating. The PTAB in Illinois received over 200,000 appeals in a recent year ^[7]. Most came from regular homeowners. The system is built to be usable. File.

Frequently asked questions

How long does a property tax appeal take from filing to decision?

At the informal review stage, most counties resolve cases within 2 to 8 weeks of the hearing date. Formal ARB or board hearings run 2 to 6 months from filing to a scheduled hearing, depending on the backlog. States like Texas often schedule hearings within 45 to 90 days of filing. Escalate to state tax court and add another 6 to 18 months. Most residential cases settle before court.

Do I need a lawyer to appeal my property taxes?

No. Every U.S. jurisdiction lets homeowners represent themselves, including formal hearings before appraisal review boards. Lawyers add value mainly in commercial cases or state court appeals involving large amounts. For a residential single-family home, a well-prepared homeowner with solid comparable sales data is just as effective as an attorney at the informal or board level, and a lot cheaper.

What if my assessed value went up but my home's condition hasn't changed?

That's a strong appeal scenario. If you can show similar homes nearby are assessed lower, or that recent comparable sales don't support the new value, you have both a market-value argument and an equity argument. Pull three to five neighbor assessments from public records and compare. Document any deferred maintenance or condition problems with photos and contractor estimates. Present both lines at the hearing.

Can a property tax appeal cause my taxes to go up?

In most residential cases, no. Assessors rarely raise a value during an appeal you filed. Some states technically allow an upward adjustment if a review turns up evidence the property was substantially underassessed, but this is uncommon for residential property. If you're worried, ask your assessor's office directly whether your jurisdiction permits upward revision during an appeal before you file.

What is an equity appeal and how is it different from a market value appeal?

A market value appeal argues your assessment is above what your home would sell for. An equity appeal argues your assessment is higher than comparable properties assessed by the same assessor, regardless of market value. Both are valid grounds in most states. Equity appeals work well when market sales are sparse but you can show neighbors with similar or larger homes carrying lower assessments in the public record.

How do I find comparable sales for my appeal?

Start with your county assessor's or appraisal district's online sales search tool; most counties have one. Redfin and Zillow both show recent sale prices with property details. The county recorder's deed database holds all recorded sales. Target sales within the past 6 to 12 months, within a half-mile to one mile, with similar square footage (within 15 to 20%), bedroom and bathroom count, and lot size. Arm's-length sales only: exclude foreclosures and family transfers.

How much can you save by appealing property taxes yourself?

Savings depend on how far your assessment sits above market value and your local tax rate. A $30,000 reduction at a 1.5% rate saves $450 a year. A $100,000 reduction saves $1,500 a year. The Lincoln Institute of Land Policy found appeals with evidence produce some reduction roughly 50 to 70% of the time. Handle it yourself and you keep 100% of that savings instead of paying a contingency firm 25 to 40% of the first year.

What is a property record card and where do I get one?

A property record card is the assessor's internal file on your property. It lists square footage, room count, year built, construction quality grade, condition rating, and features like fireplaces or finished basements used to calculate your assessment. Request it from your county assessor's office, usually for free. Many counties post it online in the parcel search tool. Read it for errors before your hearing, because errors are common and easy to fix.

Is there a fee to file a property tax appeal?

For residential property, most jurisdictions charge nothing to file a protest at the informal or board level. Some formal appeal boards charge a small fee, typically $15 to $75 for residential filers. Escalate to state tax court or district court and filing fees climb, often $100 to $300, and you may need to pay for a certified appraisal. Check your county's fee schedule; it's usually on the assessor's or appeals board website.

What happens if I win my property tax appeal?

The assessor or board issues a written order reducing your assessed value to the agreed or determined amount. Your tax bill gets recalculated at the new value. If you already paid the year's taxes at the higher amount, most jurisdictions issue a refund or credit toward the next payment. The reduced value typically carries forward into the next cycle, though it may be adjusted again at the next reassessment.

Can I appeal if I bought the house recently and the assessment already reflects the purchase price?

It's harder but not impossible. Some states (California under Prop 13, for example) set your base year value at the purchase price, so market value arguments won't help until the market drops. But if your purchase price was below the assessed value, that's direct evidence. You can also run an equity argument based on neighbor assessments, or check for data errors on your property record card that inflate the assessment past the purchase price.

What is the difference between an informal review and a formal appeal hearing?

An informal review is a scheduled conversation with an assessor's staff member or appraisal review board member, usually 10 to 20 minutes. No sworn testimony, no formal record. You present evidence and the parties try to reach an agreed value. A formal hearing is before a board or panel, often with sworn testimony, a formal record, and a binding written decision. Most appeals resolve informally. If yours doesn't, you move to the formal stage.

How do contingency property tax firms actually work and what do they charge?

Contingency firms file appeals on your behalf and charge only if they win a reduction. The fee runs 25 to 40% of your first year's tax savings, though some firms bill on multiple years. They handle filing, evidence prep, and hearings. The tradeoff is they keep a big slice of money you could have saved yourself. For residential single-family homes, the process is simple enough that DIY almost always produces better net savings.

What evidence should I bring to a property tax appeal hearing?

Bring a comp grid showing three to five recent arm's-length sales of comparable properties with your calculated implied market value. Include your property record card with any errors highlighted. Add dated photos of condition problems. If you have a licensed appraisal, bring that too. Organize it in a numbered exhibit folder, two copies, one for the board and one for you. Lead with your strongest comp and be ready to explain your adjustments for differences between your home and each sale.

Sources

1. National Taxpayers Union Foundation, "Property Tax Appeal Services" overview: Contingency property tax firms typically charge 25–40% of first-year tax savings as their fee
2. Lincoln Institute of Land Policy, "Property Tax Appeals" research: Roughly 50–70% of residential appeals that include evidence result in some reduction
3. International Association of Assessing Officers (IAAO), Standard on Assessment Appeals: Most jurisdictions give property owners 30–90 days from the assessment notice date to file a protest; filing fees for residential appeals typically run $0–$75
4. Texas Comptroller of Public Accounts, Property Tax Assistance Division: Texas protest deadline is May 15 or 30 days after notice, whichever is later; the standard homestead exemption is $100,000 off school district assessed value (as of 2023); taxpayers may appeal ARB decisions to district court
5. California State Board of Equalization, Property Tax: California county appeal windows run roughly September 15 to November 30; Assessment Appeals Boards hear formal appeals; homestead exemption is $7,000 off assessed value; Prop 13 caps annual increases at 2%; Prop 8 allows temporary reductions when market value falls below factored base year value
6. New York City Tax Commission: NYC assessment appeal deadline is March 1 for the tentative assessment roll
7. Illinois Property Tax Appeal Board (PTAB): PTAB received over 200,000 appeals in a recent year; Illinois formal appeal deadline is 30–35 days after assessment publication; taxpayers may appeal to PTAB after county board denial
8. Georgia Department of Revenue, Local Government Services: Georgia property owners have 45 days after the assessment notice date to file an appeal
9. Minnesota Department of Revenue, Property Tax: Minnesota appeal deadline is April 30 or 30 days after notice, whichever is earlier
10. Appraisal Institute, Residential Appraisal Cost guidance: Residential appraisal cost is $300–$600 in most U.S. markets
11. Florida Department of Revenue, Property Tax Exemptions: Florida homestead exemption is $50,000 for qualifying primary residences