Combined county, school, and city mills. (e.g. 30.50)
Total value deducted from assessed value.
Fair Market Value:–
Assessment Ratio (Georgia):40%
Assessed Value:–
Less Exemptions:–
Net Taxable Value:–
Estimated Annual Tax:–
function calculateGaTax() {
// Get Inputs
var fmvInput = document.getElementById('ga_fmv').value;
var millageInput = document.getElementById('ga_millage_rate').value;
var exemptionInput = document.getElementById('ga_exemptions').value;
// Parse Values
var fmv = parseFloat(fmvInput);
var millage = parseFloat(millageInput);
var exemptions = parseFloat(exemptionInput);
// Validation
if (isNaN(fmv) || fmv < 0) {
alert("Please enter a valid Fair Market Value.");
return;
}
if (isNaN(millage) || millage < 0) {
alert("Please enter a valid Millage Rate.");
return;
}
if (isNaN(exemptions) || exemptions < 0) {
exemptions = 0;
}
// 1. Calculate Assessed Value (Georgia standard is 40% of FMV)
var assessedValue = fmv * 0.40;
// 2. Calculate Net Taxable Value (Assessed – Exemptions)
var taxableValue = assessedValue – exemptions;
// Ensure taxable value doesn't go below zero
if (taxableValue < 0) {
taxableValue = 0;
}
// 3. Calculate Tax
// Formula: (Taxable Value * Millage Rate) / 1000
var estimatedTax = (taxableValue * millage) / 1000;
// Formatter for Currency
var currencyFormat = new Intl.NumberFormat('en-US', {
style: 'currency',
currency: 'USD',
minimumFractionDigits: 2
});
// Update UI
document.getElementById('res_fmv').innerHTML = currencyFormat.format(fmv);
document.getElementById('res_assessed').innerHTML = currencyFormat.format(assessedValue);
document.getElementById('res_exempt').innerHTML = "-" + currencyFormat.format(exemptions);
document.getElementById('res_taxable').innerHTML = currencyFormat.format(taxableValue);
document.getElementById('res_final_tax').innerHTML = currencyFormat.format(estimatedTax);
// Show Results
document.getElementById('ga_results').style.display = 'block';
}
Georgia Millage Rate Calculator: Understanding Your Property Tax
Property taxes in Georgia can be confusing due to the specific assessment ratios and the concept of "mills." Whether you are buying a home in Atlanta, Savannah, or rural Georgia, understanding how to calculate your property tax bill is essential for budgeting. This Georgia Millage Rate Calculator simplifies the math by applying the state-standard 40% assessment ratio to your property's value.
How the Georgia Property Tax Formula Works
Unlike many other states where taxes are calculated on the full market value of the home, Georgia uses an Assessed Value system. The formula is strictly defined by Georgia law:
Fair Market Value (FMV): The realistic selling price of your home.
Assessment Ratio: In Georgia, property is assessed at 40% of its Fair Market Value.
Millage Rate: The tax rate expressed in "mills" (dollars per $1,000 of value).
The basic formula used by our calculator is: ((FMV × 40%) – Exemptions) × (Millage Rate ÷ 1,000) = Estimated Tax
What is a Millage Rate?
The term "millage" is derived from the Latin word "millesimum," meaning thousandth. One mill is equal to $1 of tax for every $1,000 of assessed value.
For example, if your local millage rate is 30.00, you pay $30 for every $1,000 of your property's assessed (40%) value.
Your total millage rate is usually a sum of three distinct components:
County Tax: Funds county services like roads, police, and courts.
School Tax: Usually the largest portion, funding the local school district.
City/Municipal Tax: Applicable only if you live within city limits.
Example Calculation
Let's assume you own a home in Cobb County with a Fair Market Value of $300,000 and the total millage rate is 28.50. You also have a standard homestead exemption of $2,000.
One of the most effective ways to lower your property tax bill in Georgia is by filing for a Homestead Exemption. This exemption reduces the assessed value of your primary residence before the millage rate is applied.
While the standard state exemption is relatively small, many counties (like Fulton, Gwinnett, and DeKalb) offer significant additional exemptions, especially for seniors, veterans, or low-income residents. Be sure to check with your local county tax commissioner to see which exemptions you qualify for.
Where to Find Your Millage Rate
Millage rates change annually based on the budgets set by the county commission and school board. You can find your specific rate on your annual "Notice of Assessment" or by visiting your county's Tax Commissioner website. Note that rates differ significantly between incorporated (city) and unincorporated areas within the same county.