Property Tax Appeal Savings Calculator
If you believe your property has been over-assessed, a successful appeal can reduce your tax bill by lowering the assessed value used to calculate your property tax. The savings equal the reduction in assessed value multiplied by your combined millage rate. Enter your current assessed value, the lower value you are seeking, the combined tax rate per $100 of value (or as a percentage), and how many years you expect the reduction to apply, to see your total potential savings.
Property tax appeal savings formula
Value Reduction = Old Assessed - New Assessed
Annual Savings = Value Reduction x (Rate / 100)
Total Savings = Annual Savings x Years
The savings are calculated by multiplying the reduction in assessed value by the same tax rate that applies to your property. This gives the annual tax savings. Multiply by the number of years to estimate total savings over time.
Is a property tax appeal worth it?
Compare your estimated annual savings to any costs of appealing. Self-representation is free in most jurisdictions. If you hire a consultant, many work on contingency (a share of first-year savings). For a $50,000 reduction at a 2% rate, the annual savings are $1,000. Over five years that is $5,000, making professional help worth considering even at a 30% contingency fee.
Property tax appeal FAQ
How does a property tax appeal work?
A property tax appeal challenges the assessed value set by the county assessor or appraisal district. You submit evidence (comparable sales, an independent appraisal, or physical errors in the record) to an appeals board. If successful, your assessed value is reduced, which lowers your tax bill.
What evidence is needed to win a property tax appeal?
Strong evidence includes recent sales of comparable properties (comps) that support a lower value, a licensed appraisal, documentation of physical condition issues (needed repairs, damage), or errors in the assessor's records such as incorrect square footage or bedroom count.
What is the deadline to file a property tax appeal?
Deadlines vary by jurisdiction. Most are 30 to 90 days after the appraisal notice is mailed, but some jurisdictions have specific calendar dates. Missing the deadline typically waives your right to appeal for that tax year.
Does an appeal affect future years' assessments?
A successful appeal generally establishes a lower base value for future years. However, the assessor may increase the value in subsequent years through annual reassessments. Some states cap annual increases for homestead properties, which amplifies the long-term benefit of a successful appeal.
Are there costs to filing a property tax appeal?
Filing fees are usually nominal or free. Hiring a property tax consultant or attorney can cost a flat fee or a percentage of first-year savings. Self-representation is allowed in most jurisdictions. Compare estimated savings to professional fees before deciding.
Official sources
- Your county assessor or appraisal district website (varies by state).
- Texas Comptroller: Property Tax Protests and Appeals.
- Illinois Property Tax Appeal Board: Illinois PTAB.
Reviewed by the CalculatorHub team, edited by James Graham, 15 June 2026. See our methodology.