Property Tax Calculator
Enter your property's market value, your county's assessment ratio, and your total mill rate to instantly estimate your annual and monthly property tax. No sign-up required.
The Formula
Annual Tax = Taxable Assessed Value × (Mill Rate ÷ 1,000)
Assessed Value = Market Value × Assessment Ratio
Taxable Value = Assessed Value − Exemptions
Mill Rate: 1 mill = $1 per $1,000 of assessed value. Find this on your county tax bill.
Your Property Details
Estimated market value of your property.
On your assessment notice. Common: 100% (many states), 40% (GA), 35% (OH), 33.3% (IL most counties). If you enter your assessed value directly as market value, use 100%.
All levies combined (county + city + school + special districts). Find on your tax bill or use our mill rate guide.
Dollar amount subtracted from assessed value. Check with your county assessor.
Tax at Different Mill Rates
Shows how your annual bill changes as mill rates vary. Your entered rate is highlighted.
| Mill Rate | Annual Tax | Monthly | Effective Rate |
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State-Specific Calculators
Each state page includes a calculator, official assessor links, and key notes on that state's assessment system.
More Tools
- Mill Rate Calculator — Convert mills to tax dollars and see your escrow breakdown
- How to Appeal a Property Tax Assessment — Step-by-step guide + assessment vs. market value widget
- How to Calculate Property Taxes — Detailed walkthrough of the full calculation
Frequently Asked Questions
Property tax = Taxable Assessed Value × (Mill Rate ÷ 1,000). Your assessed value is typically a percentage of market value set by your county assessor. The mill rate is the combined levy from all local taxing bodies (county, municipality, school district, special districts). Subtract any exemptions from assessed value before applying the rate.
A mill rate (also called millage) is the tax rate expressed as dollars of tax per $1,000 of assessed value. One mill equals $1 per $1,000. A mill rate of 25 on a $200,000 assessed value produces a $5,000 annual tax bill. Find your total mill rate on your county property tax bill or your county assessor's website.
Many states and counties assess property at a fraction of its market value. For example, Ohio law sets the assessment ratio at 35% — so a home with a $200,000 market value is assessed at $70,000. Georgia uses 40%. Illinois uses 33.3% in most counties. Check your state's page or your tax bill for the exact ratio in your jurisdiction.
No. All calculations run entirely in your browser. Nothing you enter is sent to any server or stored anywhere.
Several factors can cause a difference: your county may use a different assessment ratio than what you entered, exemptions may have been applied that you did not enter, special assessments or fees may appear on your bill separately, or your assessor may have an assessed value that differs from the market value you entered. Always verify your bill with your county assessor.