Property Tax Estimator: Calculate Annual Taxes by Millage Rate

Enter your home's market value, assessment ratio, exemptions, and local millage rate. Your estimated annual tax, monthly escrow amount, and effective rate update instantly.

Property Valuation
100%
Local Tax Rate
Format:
Estimated Annual Property Tax
$0
Enter values above to calculate
Taxable Property Value
$0
Monthly Escrow Estimate
$0
Effective Tax Rate
0.00%
Key Terms Explained
Millage Rate (Mills)
A tax rate expressed as dollars per $1,000 of assessed value. A 15-mill rate on a $100,000 assessed value = $1,500 in annual taxes.
Fair Market Value
The price a buyer and seller would agree on in an open, arm's-length transaction. This is your home's realistic sale price.
Assessed Value
The value assigned to your property by your local assessor's office. It equals Fair Market Value multiplied by the Assessment Ratio.
Taxable Value
Assessed Value minus any exemptions you qualify for. This is the number the millage rate is applied to when computing your bill.
Assessment Ratio
The percentage of fair market value that a jurisdiction uses as the taxable base. Many states use 100%, but some use fractional ratios (40%, 25%, etc.).
Homestead Exemption
A flat dollar reduction applied to the assessed value of a primary residence. It can range from a few thousand dollars to well over $50,000 depending on the state.
Escrow
An account managed by your mortgage lender that collects monthly property tax (and insurance) payments and then pays the annual bill on your behalf.
Effective Tax Rate
Your annual property tax divided by your home's fair market value. This lets you compare the actual burden across different states or counties.

The Complete Guide to Property Taxes and Millage Rates

Property taxes are one of the largest ongoing costs of homeownership, yet the calculation is surprisingly easy to understand once you know the components. This guide walks you through how assessed value, millage rates, and exemptions interact, and how to use this calculator to get a reliable estimate for any property in the U.S.

How to Use This Calculator

Start with your home's Fair Market Value - this is what the home would sell for today. Then set the Assessment Ratio for your state or county. If you live in a state that taxes 100% of market value (like California at 100% of purchase price), leave the slider at 100. If you are in a fractional-assessment state (such as Illinois at 33.33% or South Carolina at 4% for owner-occupied homes), slide the ratio down to match.

Enter any exemptions you qualify for in total dollar terms. A $25,000 homestead exemption, a $10,000 senior freeze, and a $5,000 veterans exemption would be entered as $40,000 combined. Finally, enter your total local millage rate (or switch to percentage if your county publishes it that way) and all outputs update immediately.

Understanding Millage vs. Percentage Rates

Millage is just a shorthand for "per-thousand" - the Latin root "mille" means thousand. One mill is $1.00 per $1,000 of assessed value. A county with a 25-mill rate collects $25 for every $1,000 of taxable value. Some jurisdictions publish the same rate as a percentage (25 mills = 2.5%). Use the toggle above to enter whichever format your tax bill or county website uses.

Where to Find Your Local Millage Rate

Your total millage rate is usually the sum of several overlapping levies: county government, city or township, school district, community college, library district, and sometimes special assessment districts. You can find the breakdown on your most recent property tax bill, or search your county assessor's or treasurer's website for "millage rate" or "tax rate table." Look for the "total" line.

How Exemptions Reduce Your Bill

Exemptions are subtracted from your assessed value before the rate is applied, so a $25,000 exemption with a 20-mill rate saves you exactly $500 per year ($25,000 / 1,000 x 20). The most common exemptions are the homestead exemption for primary residences, senior citizen freezes, disabled veteran exemptions, and agricultural land classifications. Check your county assessor's site to see what you qualify for - many homeowners leave exemptions on the table simply because they never applied.

Frequently Asked Questions

A millage rate is the tax rate applied to a property's assessed value, expressed in mills. One mill equals $1 of tax for every $1,000 of assessed value. So a 20-mill rate on a $200,000 assessed value produces a $4,000 annual tax bill. Local governments - counties, cities, and school districts - each set their own millage rates, and your total rate is the sum of all applicable levies.
Many states and counties only tax a fraction of a property's fair market value. This fraction is called the assessment ratio. For example, a state with a 40% assessment ratio taxes a $300,000 home as if it were worth $120,000. Some states assess at 100% of market value, while others use ratios as low as 10%. Your county assessor sets the assessed value based on periodic appraisals, and that number can lag actual market prices.
A homestead exemption reduces the taxable value of your primary residence before the tax rate is applied, which directly lowers your bill. For example, if your assessed value is $250,000 and your county offers a $25,000 homestead exemption, you are only taxed on $225,000. Many states also offer additional exemptions for seniors, veterans, or people with disabilities. Enter the total dollar value of all your exemptions in this calculator to see your true taxable value.
Property taxes are typically billed once or twice a year by your local government - not monthly. However, if you have a mortgage, your lender usually collects a prorated amount each month and holds it in an escrow account, then pays the tax bill on your behalf when it comes due. The monthly escrow estimate in this calculator shows what that monthly collection amount would be.
Estimate Only: This tool provides a general approximation based on the inputs you enter. Actual property tax bills depend on your local assessor's official valuation, applicable exemptions, special assessments, and any levy limits set by state law. This is not tax or legal advice. Consult your county assessor's office or a licensed tax professional for authoritative figures.