---
title: "How to Appeal a Property Tax Assessment: Step-by-Step Guide (Any US County)"
description: "How to appeal your property tax assessment anywhere in the US: why you appeal the assessed value, not the bill, the three evidence types that win, where and when to file, and what to do if the first appeal fails."
url: https://propertytaxcalculator.co/how-to-dispute-property-taxes
---

Property tax appeals · checked 23 October 2026

# How to dispute your property taxes

You can't usually dispute the tax rate, which local governments set. What you can dispute is the **value** the assessor put on your home, and since the bill is roughly value times rate, a lower value means a lower bill. The steps are much the same everywhere.

**Want the answer for your own case?** Use the tool, then read on for the details.

[Check if my home is over-assessed](https://propertytaxcalculator.co/#check)

## 1. Find your deadline first

Appeal windows are short, often 30 to 45 days after the assessment notice is mailed, and a missed deadline usually means waiting a year. Your notice states the deadline; if you've lost it, the assessor's website will have it. [Deadlines by state and county](https://propertytaxcalculator.co/property-tax-appeal-deadlines) · [Cook County townships](https://propertytaxcalculator.co/cook-county-appeal-deadlines).

## 2. Check the facts on your property record

Look up your home on the assessor's website and check square footage, bedrooms, bathrooms, lot size, basement, garage and condition. A mistake here is the easiest appeal to win, because you only need to show the record is wrong.

## 3. Pick the strongest argument

| Argument | Evidence |
| --- | --- |
| **Overvaluation**: the home would sell for less | 3 to 5 recent sales of similar nearby homes, a recent appraisal, or your own purchase price if you bought recently |
| **Uniformity**: similar homes are valued lower | Assessed values of comparable homes on your street or in your area |
| **Condition**: problems the assessor doesn't know about | Photos, repair estimates, inspection reports |

[How to choose comparable sales](https://propertytaxcalculator.co/cook-county-comparable-sales).

## 4. File, usually online and free

Most assessors and review boards accept appeals online with no fee, and you don't need a lawyer. Keep your argument short: what value you think is right and why, with the evidence attached. Some places, such as Texas, hold a short hearing where you present it.

## 5. If it fails, go to the next level

Most states have a second step: a county board of review or equalization, then a state appeals board or tax court. In Cook County, for example, you can go from the Assessor to the [Board of Review](https://propertytaxcalculator.co/cook-county-board-of-review-appeal), then to the state Property Tax Appeal Board.

## Don't forget exemptions

Separately from the value, make sure every exemption you qualify for is on your bill: homestead, senior, disability, veteran. Missing ones are often the quickest saving, and some can be claimed back for past years. [Cook County exemptions](https://propertytaxcalculator.co/cook-county-exemptions) · [missed Texas homestead exemption](https://propertytaxcalculator.co/missed-homestead-exemption-refund).

## Should you use an appeal company?

Appeal companies and attorneys usually charge a share of the first year's saving. That can be worth it for unusual or high-value properties. For an ordinary home with clear comparables, filing yourself is usually straightforward and keeps the whole saving. [What appeal companies charge](https://propertytaxcalculator.co/property-tax-appeal-companies).

[Check if my home is over-assessed](https://propertytaxcalculator.co/#check)

Going to a hearing? Here is [what to say at a property tax appeal hearing](https://propertytaxcalculator.co/what-to-say-property-tax-appeal).

General guidance; rules, deadlines and forms differ by state and county. Always follow the instructions on your own assessment notice.