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See exactly how I did it.
My quick story: how I knocked $80,000 off my home's assessed value, and how this tool does the same for you.
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You're probably overpaying your property taxes. Most homes are over-assessed, and you quietly pay for it every single year. This $19 tool builds your entire appeal. It gives you the comps, the evidence and even a script for your hearing.
Instant download · ChatGPT or ClaudeMy quick story: how I knocked $80,000 off my home's assessed value, and how this tool does the same for you.
Plug in your numbers and see what a reduction like our proven result could mean for you, this year and stacked up over a decade.
You can reuse the prompt every year to achieve even more savings.
Based on a real result: a home assessed in the $900Ks had its value cut by more than $80,000 (about 8.6%) with a case built this way. This calculator applies that same 8.6% reduction to your numbers. It is an illustration, not a promise. Your actual savings depend on your property, your evidence, and your local tax rate.
You don't need to be technical, and you don't need to know anything about appraisals. If you can copy, paste, and answer a few questions, you can do this.
Drop the prompt into ChatGPT or Claude and answer a handful of quick questions about your home.
It builds your comparable-sales analysis, surfaces your strongest arguments, and writes your evidence and statement.
Submit the package through your assessor's portal and read the script at your hearing or review.
There are only two other ways to win this: pay a firm a fat slice of your savings, or burn a weekend doing the research yourself. Here's everything "yourself" actually involves.
Every county does it differently, forms, windows, evidence rules.
Check the county's sqft, year, and features against reality.
Search, filter, and vet several recent sold homes that truly match yours.
The unequal-appraisal angle most homeowners don't even know exists.
Crunch the numbers and work out which comps help vs. hurt.
In language an appraiser takes seriously, then assemble the packet.
Script it, anticipate the pushback, and practice.
Spread across several days, plus the learning curve and the false starts. Or hand it to a firm and give up 30% to 50% of everything you save, every year, forever.
Answer a few questions and get the whole package, comps, analysis, statement, and hearing script. Keep 100% of what you save. One time.
Not a vague "how-to." A working tool that produces every piece you actually submit.
The full engine, refined on a real winning appeal.
A clean comp table and price-per-square-foot breakdown.
The second angle most homeowners never use, and that often wins on its own.
Reasonable, professional, and built to be uploaded as-is.
Exactly what to paste and which files to attach.
Plus rebuttal lines for when they push back with higher comps.
This prompt creates and writes your argument for you, word-for-word, and gives you the evidence you need to present your case confidently. No guesswork, no blank page, no winging it at the hearing.
A real outcome, not a promise. Your result depends on your property, your comps, and your local market. Reductions vary and are never guaranteed.
| Your options | Protest Co-Pilot | Hire a firm | Do nothing |
|---|---|---|---|
| Cost | $19, once | 30% to 50% of savings, yearly | $0 |
| Who keeps the savings | You, 100% | You, minus their cut | Nobody |
| Effort | Quick & guided | Hands-off, but pricey | None |
| Builds your evidence & script | Yes, all of it | They handle it | No |
| Likely outcome | A real, comp-backed case | A real case | Keep overpaying |
Protest Co-Pilot is a $19 do-it-yourself tool for lowering your property taxes. It is a guided AI prompt you paste into ChatGPT or Claude. You answer a few plain questions about your home, and it builds your complete property tax appeal: a comparable-sales analysis, an unequal-appraisal argument, a submission-ready written statement for your assessor's portal, and a word-for-word script for your hearing. You file your own appeal and keep 100% of whatever you save, instead of paying a firm a yearly cut.
Yes. In nearly every state, property owners have the legal right to appeal their own assessment, with no lawyer or consultant required. Protest Co-Pilot gives you the full evidence package and the script to do it confidently on your own.
Compare your assessment to recent sales of similar homes nearby. If comparable homes are selling for less than your assessed value implies, or neighbors with similar homes are assessed lower per square foot, you are likely over-assessed. The tool runs that comparison for you and tells you whether you have a case.
It depends on how over-assessed you are and your local tax rate. Even a modest reduction often saves hundreds to a few thousand dollars a year, and the savings repeat annually because your assessed value resets lower. In one real case, a home assessed in the $900Ks was cut by more than $80,000. Use the calculator on this page to estimate your own.
The strongest evidence is recent comparable sales that support a lower value, an unequal-appraisal comparison showing similar homes are assessed lower, corrections to any errors in your property record, and documentation of condition issues. Protest Co-Pilot assembles all of it into one upload-ready package.
It is a separate way to win your appeal. Instead of arguing market value, you show that comparable properties near you are assessed at a lower value per square foot than yours. If you are taxed more heavily than similar homes, many jurisdictions require an adjustment regardless of sale prices. It is one of the most overlooked arguments, and the tool builds it for you automatically.
Deadlines vary by state and county and are usually a short, fixed window each year, often just weeks after your assessment notice arrives. Check your notice or your local assessor's website and file before the cutoff, since late appeals are usually not accepted.
Market value is what your home would sell for. Assessed value is the figure your local government uses to calculate your tax bill, sometimes equal to market value and sometimes a set percentage of it. Your appeal targets the assessed value, which is what the savings calculator uses.
Yes. Most charge either a flat fee or a contingency cut, commonly 30% to 50% of your first-year savings, and many bill you again every year. Protest Co-Pilot is a one-time $19, and you keep everything you save.
Filing an appeal simply asks for a review of your assessed value, and it is a routine process millions of homeowners use every year. Rules vary by jurisdiction, so confirm your local process, but the purpose of the tool is to help you walk in with strong evidence so you are making your case from a position of strength.
Yes. It works in all 50 states, adapting to your local process, deadline, and terminology, whether your area calls it a protest, an appeal, or a grievance.
No. Protest Co-Pilot is a do-it-yourself preparation tool, not a law firm or a licensed tax professional, and results vary by property and market.
Miss the window and you're locked into an over-assessment for the whole year. Pick your state to see the typical deadline and exactly who to confirm it with.
Reviewed June 2026. Deadlines vary by county and can change, and many are set relative to the date your assessment notice is mailed. This is general guidance, not legal advice. Verify your exact deadline locally before relying on it.
Nineteen dollars for the tool. The savings, if you win them, are yours to keep, every year going forward.