Are You Overpaying on Property Taxes?
Here's a stat that should grab your attention: studies consistently show that 40–60% of residential properties in the US are over-assessed. That means there's a better-than-even chance you're paying more in property taxes than you should be. The average successful appeal saves homeowners $500 to $2,000 per year — and that's money that keeps saving you year after year.
Property tax assessment notices typically go out in spring (March–May in most states), and you usually have 30–90 days to file an appeal. If you've recently gotten your 2026 assessment and the number looks high, now is the time to act. The process isn't as intimidating as it sounds — most homeowners can handle it themselves without hiring an attorney.
Understanding Your Property Tax Assessment
Your property tax bill is calculated using two numbers:
- Assessed value — What your county assessor says your property is worth
- Tax rate (millage rate) — Set by your local government, typically expressed as dollars per $1,000 of assessed value
For example, if your home is assessed at $350,000 and your local tax rate is $12 per $1,000, your annual property tax is $4,200. If you can prove your home should be assessed at $300,000 instead, your tax drops to $3,600 — a $600/year savings.
Here's what your assessment is based on and where errors creep in:
| Assessment Factor | Common Errors | How to Check |
|---|---|---|
| Square footage | Incorrect measurements, counting unfinished space as finished | Measure yourself or check original appraisal |
| Lot size | Outdated survey data | Check your deed and county GIS maps |
| Number of bedrooms/bathrooms | Counts from old records that don't match reality | Compare assessment card to actual layout |
| Property condition | Assessor assumes "average" condition without visiting | Document any issues (foundation, roof, etc.) |
| Comparable sales | Using non-comparable properties (different size, location, condition) | Pull recent sales data for truly similar homes |
Step-by-Step: How to Appeal Your Property Tax
Step 1: Get Your Property Record Card (Free)
Contact your county assessor's office or check their website. Your property record card shows every detail the assessor has on file — square footage, lot size, number of rooms, year built, condition rating, and the comparable sales they used. This is where you'll often spot errors.
Step 2: Check for Factual Errors (Most Common Win)
Compare your property record card against reality. The most common factual errors include:
- Square footage is wrong (this happens more than you'd think)
- The record shows 4 bedrooms when you have 3
- A finished basement is listed when yours is unfinished
- Your property condition is rated "good" when it's actually "fair"
- A garage, pool, or addition is listed that doesn't exist
Factual errors are the easiest to win because they're objective. If the assessor says your home is 2,400 sq ft and it's actually 2,100 sq ft, you win.
Step 3: Research Comparable Sales ($0–$50)
Pull recent sales (within the last 6–12 months) of homes that are truly comparable to yours — similar size, age, condition, location, and lot size. Free sources include Zillow, Redfin, and your county's property records. Pull 5–10 comps to build a strong case.
Look for comps that sold for less than your assessed value. If your home is assessed at $350,000 but similar homes are selling for $300,000–$320,000, you have a strong argument.
Step 4: File Your Appeal (Usually Free)
Most jurisdictions allow you to file an informal appeal first (a simple form or letter to the assessor). If that doesn't work, you can escalate to a formal hearing before a Board of Review or Board of Assessment Appeals. Filing is usually free or costs $25–$50.
Step 5: Present Your Case
At the hearing (in-person, virtual, or sometimes written only), present:
- Any factual errors you found
- Your comparable sales analysis
- Photos showing property condition issues
- A recent independent appraisal, if you have one ($300–$500 for a new one)
What It Costs to Appeal
| Approach | Cost | Success Rate | Best For |
|---|---|---|---|
| DIY appeal (informal) | $0–$50 | 30–40% | Factual errors, minor overassessment |
| DIY appeal (formal hearing) | $0–$50 | 40–50% | Homeowners comfortable presenting data |
| Hire a tax appeal company | 30–50% of first year's savings | 60–70% | Significant overassessment, complex cases |
| Hire a real estate attorney | $1,000–$3,000 | 50–65% | High-value properties, major disputes |
| Get a new appraisal | $300–$500 | Supports any appeal | When comps clearly show lower value |
State-by-State Appeal Deadlines
Deadlines vary significantly by state. Here are some key ones for 2026:
- Texas: May 15 (or 30 days after notice, whichever is later)
- Florida: 25 days after the TRIM notice (typically September)
- California: September 15 for the current assessment year
- New York: Varies by municipality (March–May for most)
- Illinois: 30 days after publication of assessment
- New Jersey: April 1 for county tax board, October 1 for Tax Court
- Pennsylvania: Varies by county (typically August 1)
- Georgia: 45 days from notice date
Check your assessment notice or county assessor website for your exact deadline. Missing the deadline means you wait another full year.
Tips for a Successful Appeal
- Be organized and professional. Come with printed copies of your comps, property card, and photos. Board members review dozens of cases — make yours easy to understand.
- Don't argue about the tax rate. You can only challenge your assessed value, not the tax rate itself.
- Focus on data, not emotions. "My taxes are too high" isn't persuasive. "My home is assessed at $350,000 but these five comparable sales show a market value of $300,000–$320,000" is.
- Use negative features. If your home backs up to a highway, has a small lot, or needs a new roof, document it. These factors should lower your assessed value relative to comps.
- Consider neighboring properties. If your neighbor's nearly identical home is assessed $30,000 lower, that's powerful evidence of unequal assessment.