Property Tax Service Companies: Honest Comparison Across States

Last reviewed: May 2026 · Coverage: Texas, California, Illinois, New Jersey, New York, Florida, Massachusetts, Connecticut, Pennsylvania, Ohio, Georgia, North Carolina, Virginia, Michigan

The property-tax-appeal service-company industry is large and varied. Most homeowners encounter service companies through direct mail flyers ("Reduce Your Property Taxes!") or online ads, often shortly after receiving an assessment notice. This guide compares the major firms and pricing models across our 5 launch states.

The major players

National (multi-state)

Ownwell — operates in TX, CA, IL, NJ, NY and several other states. National brand. 25-35% contingency typical. Documented auto-renewal patterns generating BBB complaints; read the contract carefully.
AppealDesk — newer (~2 years), national footprint. Mid-size. Contingency-based pricing.
O'Connor & Associates — Houston-based, dominant in Harris CAD; expanding into other states. 25-35% contingency typical for residential.

Texas-focused

Texas ProTax — statewide TX. High volume in Travis, Harris, Tarrant.
Texas Tax Protest — Austin-based, dominant in Travis CAD.
Five Stone Tax Advisers — statewide TX.
Cut My Taxes, AtomiX, Tax Cutter — various smaller TX firms.

New York-focused

Heller & Consultants Tax Grievance — Long Island. Published rate: 50%.
All Island Tax Grievance — Long Island. Quotes typically 40-50%.
Property Tax Reduction (Realty Tax Challenge) — Long Island.
Aventine Properties — Westchester focus.

Illinois-focused

Local flyer-in-mail consultants — many small firms operating county-by-county. Typically 33%+ contingency. Quality and approach vary substantially.

California-focused

Most CA Prop 8 reviews are handled directly by the homeowner via the county assessor's office at no cost. Service companies (when used) typically charge 25-40% contingency for AAB-level cases.

Pricing models compared

Model	How it works	Where common	Watch for
Contingency	X% of one year's tax savings if successful, nothing if not	TX, NJ, NY, CA	Auto-renewal terms; minimum-fee thresholds; clarity on which year's savings count
Flat fee per parcel	$50-$300 per protest filing	TX (some firms)	Whether escalation fees apply
Subscription / annual	Annual flat fee covering all protests filed each year	TX (growing)	Whether you can cancel mid-year; what's covered
Hourly + flat	Standard for Tax Court / SOAH / commercial cases	NJ Tax Court, NY Article 7	Estimate vs. actual; expert witness fees

Contingency rate ranges by state

Year-1 first-year savings is the standard contingency basis:

State	Typical residential contingency	Notes
Texas	25-40%	Mid-tier; volume-based business model
California	25-40%	Most CA cases don't need a service company (Prop 8 informal review free)
Illinois	25-35%	Plus 33%+ for many local flyer consultants
New Jersey	25-40%	Some firms have $250-$500 minimum-fee thresholds
New York (Long Island)	40-60%	Highest in U.S.; volume-based business model on Long Island
New York (rest of state)	25-50%	Westchester/Hudson Valley typically 25-35%; upstate lower
Florida	25-40%	Save Our Homes-protected homesteads complicate engagement — service companies often won't take cases where the SOH cap binds (no value reduction translates to bill change). $25K+$25K homestead and $50K-$25K split-stack add complexity.
Massachusetts	25-40%	Primary value at the Appellate Tax Board where evidence exchange and formal procedure matter. Boston Residential Exemption application is critical to claim before considering value appeals — saves up to $4,353.74 (FY 2026).
Connecticut	25-40%	Mill rates vary 6× across municipalities (Hartford 68.95 vs Greenwich ~11), so absolute-dollar savings vary widely with the same percentage reduction. §12-119 1-year fail-safe operates independently of BAA cycle.
Pennsylvania	25-40%	Common Level Ratio (CLR) substitution under 53 Pa.C.S.A. §8854 is the highest-leverage tool when CLR is 15%+ below predetermined ratio (Allegheny 2026 CLR = 50.1% = ~50% reduction available). Ask any Pennsylvania consultant about CLR before signing.
Ohio	25-40%	House Bill 126 (2022) sharply restructured the consulting landscape — pre-2022 work defending against school-district counter-complaints largely disappeared for residential. Current consulting concentrates on offensive BOR complaints in sexennial/triennial reappraisal years.
Georgia	25-40%	HB 92 (2024) eliminated speculative-filing strategy via freeze elimination — firms now engage only on substantive cases. For Atlanta-metro owners 62+/65+, ASK ABOUT THE SENIOR SCHOOL-TAX EXEMPTION FIRST in Fulton, DeKalb, Cobb, Gwinnett, Cherokee, Forsyth — typically far higher leverage than market-value appeals.
North Carolina	25-40%	NC's free BoER process (no filing fee at Tier 1 OR Tier 2 PTC) and accessible major-county online portals (Mecklenburg, Wake, Forsyth, Buncombe, Durham) make DIY appeals more viable than in most states. Service-company value concentrates at PTC where formal evidentiary procedure essentially requires a licensed NC appraiser's retrospective opinion of value ($400-$700).
Virginia	25-40%	VA's locality-level system (95 counties + 38 independent cities) creates fragmented service-company landscape — practitioners cluster around NoVa, Hampton Roads, Richmond metro, or Roanoke. Free BOE process and §58.1-3984 three-year Circuit Court window make DIY appeals viable. Service-company value concentrates at Circuit Court tier where USPAP-compliance requires a Virginia-licensed appraiser ($400-$700). Critical pre-engagement screen: ask about §58.1-3219.5 Disabled Veterans Exemption and §58.1-3231 Land Use Assessment — both can dwarf value-appeal outcomes.
Michigan	25-40%	Service-company landscape clusters around Detroit-metro (Wayne, Oakland, Macomb), Grand Rapids (Kent), Ann Arbor (Washtenaw), Lansing (Ingham). Free March BoR + accessible portals make DIY viable. Service-company value concentrates at MTT tier — TCV disputes benefiting from licensed Michigan appraiser, uncapping disputes requiring MCL 211.27a(7) citation, PRE rescission cases. For owners contemplating any ownership change (estate, family, trust, LLC), highest-leverage discipline is consulting an attorney pre-closing about MCL 211.27a(7) exempt categories — $200-$1,000 in legal fees prevents $2,000-$10,000+/yr tax pop-ups.

What service companies are good for

Filing volume. They handle thousands of protests simultaneously and have established settlement-negotiation channels with major CADs/BoRs/CBTs.
Time efficiency. No DIY hours pulling comps, completing forms, attending hearings.
Procedural expertise. Less likely to make procedural-defect dismissals (filing wrong form, missing deadline, etc.).
Comp pulling. Some firms have premium MLS access and can pull comps efficiently.

What service companies aren't necessarily better at

Evidence quality. They use the same MLS data + assessor records you can access. The CAD/BoR/CBT applies the same evidence rules to all appellants.
Outcome rates on the merits. Empirical data suggests well-prepared DIY appeals achieve comparable percentage reductions to agent-filed appeals when the homeowner has strong comp evidence.
Multi-year rollover work. Most firms file the regular annual protest but don't pursue:
IL §16-185 rollover follow-up petitions for owner-occupied PTAB wins
NJ §54:3-26 judgment-freeze enforcement (some firms do; many don't)
CA Prop 8 annual reviews for past clients (typically not part of standard contingency engagement)
TX §25.25(c) clerical-error corrections for past tax years

Red flags to watch for

Auto-renewal that requires explicit opt-out. Many contingency contracts auto-enroll you for subsequent years. Read the cancellation terms.
Minimum-fee thresholds that exceed your potential savings. A firm charging "$250 minimum or 25%" is taking a higher effective rate on small cases.
Vague language about which year's savings count. Contingency typically applies to year 1; some contracts try to apply to multiple years.
No clarity on escalation fees. What happens if the case escalates from CBT to Tax Court — is that the same contingency, additional flat fee, or attorney engagement?
High-pressure direct-mail tactics. Especially common after assessment notices arrive. Real grievance firms don't need to oversell.

When service companies make sense

You don't have time to spend 5-10 hours pulling comps and attending hearings
Your savings are large enough that even after 30-50% contingency, the math works
The case is procedurally complex (Tax Court, SOAH, Article 7, complex commercial)
You value reduced anxiety more than the contingency cost

When DIY makes sense

You have time and modest comfort with paperwork
Your evidence is straightforward (recent purchase price, factual record errors, clear comp matches)
Your savings are modest — paying 50% of $400 leaves $200; DIY 5 hours at $40/hr alternative use is roughly the same
You want to learn the system for future years (most homeowners protest annually in TX; periodic in IL)

Use the breakeven calculator

Run your specific numbers through the Service-vs-DIY Breakeven Calculator. Inputs: state, estimated annual savings, contingency rate offered, your DIY time estimate, your hourly time value. Output: which approach wins on year-1 economics.

Multi-year economics — important caveat

Year-2+ savings often accrue 100% to the homeowner regardless of who filed the original appeal. Contingency typically applies only to year 1. So in states with strong carry-forward (IL §16-185, NJ §54:3-26 freeze, CA Prop 8 multi-year), the multi-year economics tilt back toward service-company hire even if year-1 economics favor DIY.

State cornerstones with service-company commentary

Texas — TX-specific landscape
California — CA-specific landscape
Illinois — IL-specific landscape
New Jersey — NJ-specific landscape
New York — NY-specific landscape (Long Island highest contingency)

The Property Tax Desk Editorial Team