Property Tax Appeal Calculator
Estimate your potential tax savings and appeal strength before filing
Your Property Details
Fair Market Value Estimate
Quick Comparables (Optional)
Appeal Analysis
Comparable Property Analysis
Enter up to 5 comparable properties to determine what your home should be assessed at. Price per square foot is the key metric assessors use.
| # | Address / Description | Sale Price | Sq Ft | Sale Date | $/Sq Ft | Adj. Value |
|---|---|---|---|---|---|---|
| Average (Comparable Indication) | — | — | ||||
Review Your Assessment Notice
When you receive your annual assessment notice, check: the assessed value, the property description (sq footage, bedrooms, lot size), and the appeal deadline. Errors in property characteristics are an easy win — if they have your home listed as 2,400 sq ft when it's 1,800, that alone may justify a reduction.
Gather Comparable Sales
Collect 3–6 sales of similar properties (within the last 12 months, within 1 mile, similar size, age, and condition). Use public records, Zillow, Redfin, or your county assessor's online database. The comparable sale date matters — sales that occurred before the assessment date are most relevant.
Check the Appeal Deadline
Most jurisdictions require appeals within 30–90 days of the assessment notice date. Missing this deadline means waiting until the next tax year. Write down the exact deadline from your notice or your assessor's website. Some areas allow year-round informal review requests.
File the Appeal Form
Obtain the correct appeal form from your assessor's office or county website. Fill it out completely — include your property ID, your opinion of value, and a summary of evidence. Attach copies of comparable sales. Pay any filing fee (often $0–$100 for residential properties). Keep a copy of everything.
Attend the Hearing
Present your evidence clearly and calmly. Focus on comparable sales data, not your personal opinion of value. Bring printed copies of comparable sales, a map showing their proximity, and photos of any defects. Many homeowners succeed simply by showing up with organized documentation — assessors often settle informally.
Negotiate or Accept the Decision
After the hearing, you'll receive a written decision. If successful, your assessment (and tax bill) will be reduced. If denied, you may have the option to appeal further to a state board or court — but weigh the cost vs. potential savings. Many cases resolve with a partial reduction even if you don't get the full amount requested.
Tips for a Strong Appeal
- Use sales from the same tax year assessment period — typically the prior calendar year
- Document condition issues: deferred maintenance, foundation cracks, roof age, outdated systems
- Be professional and factual — emotional arguments rarely work
- Consider hiring a property tax consultant for high-value properties (they often work on contingency)
- Check if the assessor made any clerical errors — wrong bedroom count, wrong square footage, wrong property class
- Look at neighboring properties: if similar homes are assessed lower, document the discrepancy
- Even a 10% reduction on a $400,000 assessment at 1.5% saves $600/year — compounding over years that adds up
State-by-State Variations
Property tax appeal rules differ dramatically by state: