I Got My Property Tax Assessment Notice — What Do I Do Now?

Updated June 2026 · 8 min read

You have a limited window to act — typically 30 to 90 days. Here is exactly what to do after receiving your property tax assessment notice.

Step 1: Find Your Appeal Deadline

Look for language like “file an appeal by” or “protest deadline.” This date is typically 30 to 90 days from when the notice was mailed. Missing this deadline forfeits your right to appeal for the entire tax year.

Step 2: Check Whether Your Assessment Is Accurate

Your notice shows your assessed value. To find your implied market value, divide by your state's assessment ratio (Georgia: divide by 0.4; Illinois: divide by 0.1; Texas: 100% so no conversion needed). Compare that implied market value to recent sales of similar homes. If your implied market value is higher than comparable recent sales, you have grounds to appeal.

Check If Your Assessment Is Too High

Enter your address to see comparable sales and whether your assessment exceeds market value.

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Step 3: Decide Whether to Appeal

Appeal if your implied market value exceeds what comparable homes recently sold for. There is almost no risk: in most states, the assessed value cannot increase during the appeal process for residential properties. Filing is free.

Step 4: Gather Your Evidence

The evidence that wins property tax appeals is comparable sales data — 3 to 5 recent arm's-length sales of similar homes in your neighborhood where the sale price implies a lower market value than your assessment. See our full guide: What Evidence Do I Need for a Property Tax Appeal?

Step 5: File Before the Deadline

File your appeal online with your county assessor before the deadline. You can file first and add evidence later — but you must file by the deadline date on your notice. See our state-by-state deadline calendar to confirm your filing window.

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Frequently Asked Questions

What is a property tax assessment notice?

A property tax assessment notice is an official document from your county assessor stating the assessed value of your property for the upcoming tax year. It includes your appeal deadline and sometimes your estimated tax bill.

What happens if I do not appeal my property tax assessment?

If you do not appeal, the assessed value on your notice becomes final and your property tax bill is calculated based on that value for the full tax year. You will miss the opportunity to reduce your taxes until the next assessment cycle.

How long do I have to appeal after receiving my notice?

It depends on your state. Texas: 30 days from notice or May 15. Georgia: 45 days. Florida: 25 days from TRIM notice. Illinois: township-specific windows. Check your notice for the exact deadline.