Property tax assessments are landing in mailboxes across the country this month, and a lot of homeowners are opening them to find numbers that seem to have nothing to do with what their house is actually worth.
County assessors use mass appraisal formulas, not individual home sales, which means your assessed value can drift far from reality in either direction.
In a market where home prices have bounced around wildly since 2021, that gap has turned into real money for millions of households.
Assessors typically work on a one- to three-year cycle, and many counties use data that's a year or more old by the time bills go out.
If your local market cooled off but the assessor is still using 2023 sale prices, your bill may reflect a peak that no longer exists.
The reverse happens too, but it's the over-assessment cases that are driving the current wave of appeals.
The stakes are bigger than most people realize.
Property taxes often run 1% to 2% of assessed value, so a $40,000 over-assessment on a $400,000 home can mean $400 to $800 a year in extra payments.
Over several years, that adds up to thousands of dollars, and it's money most families would rather keep.
The good news: you can push back, and it costs nothing to try.
Every county has a formal appeal process, usually with a deadline that falls 30 to 90 days after notices go out.
Miss the window and you're stuck with the number for another cycle.
You fill out a form, state why you think the value is wrong, and submit supporting evidence.
The evidence part is where people leave money on the table.
The strongest proof is recent sales of comparable homes in your neighborhood, ideally three to five of them, sold within the past year, similar in size, age, and condition.
County appraisal district websites often let you pull this data for free.
You can also use a recent independent appraisal if you have one, photos of damage or needed repairs the assessor didn't account for, or a contractor's estimate showing deferred maintenance.
A few practical tips that raise your odds.
Stay factual and brief in your written statement.
Don't argue that taxes are too high, argue that the assessed value is wrong.
If your county offers an informal review before the formal hearing, take it, because many cases get resolved there without a full board meeting.
Some homeowners hire a tax protest company that works on contingency, typically taking 30% to 40% of the first year's savings.
That can be worth it for complicated commercial property or high-value homes, but for a typical single-family house, the DIY route usually works fine.
The paperwork is public and the process is designed for non-lawyers.
Homestead, senior, veteran, and disability exemptions can knock thousands off your taxable value, but many counties require you to apply, and some require periodic renewal.
A quick call to the appraisal district can confirm what you qualify for.
The bottom line: your assessment is not a final answer, it's an opening offer.
Most homeowners never appeal, which means counties face zero pressure to get it right.
Final Thoughts
Spending an hour with your county's website and a few comps could save you several hundred dollars a year, and unlike a lot of money advice, this one actually pays off in cash.