Property Tax Appeal Savings Calculator (50 States)

Find out how much you could save each year by appealing your property tax assessment. Enter your numbers below, then check your state's appeal deadline so you do not miss the filing window.

Estimate Your Appeal Savings

State Home market value (your estimate of true value) What your home would realistically sell for today. Use recent comparable sales in your neighborhood as a guide. Current assessed value (from your tax bill or assessment notice) This is the value your county assessor assigned, not what you paid for the home. In states that assess at a fraction of market value, enter the assessed figure shown on your bill. Local effective property tax rate (percent) Where to find it on your tax bill: divide your total property tax by your assessed value, then multiply by 100. If your bill shows a mill rate, divide mills by 10 (for example, 25 mills = 2.5%). A typical U.S. effective rate is between 0.3% and 2.5%.

Your results

Annual tax at current assessment

Annual tax if assessment is corrected to market value

Estimated yearly savings

Estimated 5-year savings

This assumes a successful appeal reduces your assessed value to the market value you entered. Actual outcomes depend on your evidence and your local board. Estimates only, not tax advice.

Property Tax Appeal Deadlines by State

Deadlines below recur annually. Many 2026 deadlines have already passed; confirm the current year's exact date with your county assessor or board of appeals before filing. Where deadlines could not be verified from a public source, the state is marked "varies by county" rather than guessed.

State	Appeal deadline	Source

Tip: search "[your county] property tax appeal deadline" on your county assessor or board of appeals website for the exact current date and filing form.

Frequently Asked Questions

What is a property tax appeal?

A property tax appeal (called a "protest" in Texas) is a formal challenge to the assessed value your county placed on your home. You are not challenging the tax rate; you are arguing the value is wrong. If the board agrees, your assessment drops and your annual bill goes down, usually for as long as the corrected value stands.

How do I know if my home is over-assessed?

Compare your assessed value to recent sales of similar homes in your neighborhood. If comparable homes sold for meaningfully less than your assessed value, or your home has condition problems the assessor did not account for, you may have a case. Many counties publish recent sales data online.

How much does it cost to appeal?

In most places filing the appeal itself is free or carries a small filing fee (often under $50). Hiring a property tax appeal firm usually works on contingency, commonly 25 to 50 percent of the first year's savings, or a flat fee. DIY appeals cost nothing but your time.

What evidence do I need?

The strongest evidence is recent comparable sales of similar homes near you, ideally within the past 12 months. Photos of condition issues, repair estimates, and an independent appraisal also help. Assessment notices and your property record card from the assessor's office are worth reviewing for factual errors like wrong square footage.

Can appealing raise my assessment?

In most states, no: the board generally cannot raise your value above the assessor's figure just because you appealed. Georgia is a notable exception, where a failed appeal can result in a higher value. Review your market data carefully before filing in any state.

What happens if I miss the deadline?

You generally lose the right to challenge that year's assessment and must wait for the next filing window. Deadlines are strict in nearly every state, so mark the date from the deadline table above on your calendar as soon as your assessment notice arrives.

Guides

How to Find Comps for a Property Tax Appeal (and Which Ones Actually Count)

Where to get free comparable sales, what makes a comp count with the review board, and how to present 3 to 5 sales that prove your home is over-assessed.

Property Tax Appeal Companies: What They Charge, and When DIY Wins

Contingency fees of 25 to 50 percent versus flat-fee packets, the minimum-fee trap, and the math that decides whether hiring help is worth it.

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