Metro Atlanta property taxes and homestead exemptions explained

The one formula worth understanding

Georgia's math has two steps. Fair market value is multiplied by 40 percent to get assessed value. Millage rates are then applied to that assessed value, where one mill equals one dollar per thousand of assessed value.

Because the assessment is only a portion of market value, Georgia millage rates look higher than in states that assess at full value. Comparing raw millage across state lines tells you almost nothing. Comparing the actual annual bill tells you everything.

Why city limits change the number

A home inside the City of Atlanta pays county and school millage plus city millage. The same is true in Decatur, Marietta, Roswell, and other incorporated cities. A home in unincorporated county territory skips the city layer.

This is one reason two homes at the same price in the same general area can have meaningfully different monthly payments. When you compare neighborhoods, confirm the jurisdiction rather than assuming.

The seller's tax bill is a trap

The current owner may be carrying an exemption you will not inherit, or a valuation set years before the home's recent appreciation. Using their figure to estimate your payment tends to understate what you will actually escrow.

The safer approach is to estimate based on your purchase price and the current millage for the property's jurisdiction, and to expect a reassessment in the year after you buy. That way a later escrow adjustment is an expectation rather than a shock.

Homestead exemptions, and the deadline that costs people money

A homestead exemption reduces the taxable value of your primary residence. Counties across the metro offer a basic exemption, and many add exemptions for seniors, veterans, or long-term residents.

None of it happens by itself. You apply with your county, and there is a filing deadline early in the year. Buyers who close mid-year and forget to file usually wait a full cycle before the savings appear. Put it on your calendar the week you close.

How this flows into your mortgage payment

• · Your lender collects roughly one twelfth of the annual tax bill each month into escrow
• · If the initial estimate was low, your payment rises at the next escrow analysis
• · Higher taxes also raise your debt-to-income ratio, which lowers the price you qualify for
• · An exemption you secure can reduce escrow at the next analysis
• · Association dues are separate from taxes but also count in qualifying