What this calculator does
Atlanta homeowners can claim homestead exemptions that lower the assessed value on their tax bill, and many also benefit from floating homestead exemptions that limit how fast the taxable value can grow. This calculator estimates both. Georgia taxes property on 40% of fair market value. In the Fulton County part of Atlanta, the city and county millage totaled about 40.9 mills in 2025. Homestead exemptions differ by levy, and Atlanta and its schools use floating homestead exemptions that limit how quickly a home's taxable value can grow.
How to use it
- Enter fair market value.
- Enter the exemption amount off assessed value (confirm with your county).
- Enter the millage for your area.
- Enter expected market growth and the inflation cap to project the floating homestead.
The formula
Yearly saving = exemption × millage ÷ 1,000. Floating homestead saving each year ≈ (market value − value grown only at the cap) × 40% × millage ÷ 1,000.
Worked example
Using the default inputs shown in the calculator above:
| Step | Amount |
|---|---|
| Fair market value | $450,000 |
| Assessed value (40%) | $180,000 |
| Homestead exemption (assessed value) | -$30,000 |
| Net assessed value | $150,000 |
| Tax at 40.909 mills | $6,136 |
| Yearly saving | $1,227 |
Yearly saving from the homestead exemption: $1,227. Plus about $10,302 over 10 years if a floating (base-year) homestead limits growth to 3%.
The exemption removes $30,000 of assessed value (which is 40% of market value), so at about 40.9 mills it saves $1,227 a year. The larger long-run saving comes from limiting how fast the taxable value can grow when market values rise faster than inflation.
How Atlanta homesteads work
Fulton County, the City of Atlanta and Atlanta Public Schools each have their own homestead exemptions, and DeKalb County's EHOST program works differently on the DeKalb side of the city. Georgia's HB 581 (2024) created a statewide floating homestead limiting yearly growth to inflation unless a local government opted out. Apply by April 1.
Common mistakes and tips
- Assuming one exemption amount covers every levy.
- Missing the April 1 deadline.
- Not reapplying after refinancing into a new name or trust.
- Forgetting senior exemptions, which can be much larger.
Frequently asked questions
How much does the Atlanta homestead exemption save?
It depends on the exemptions for your levies and the millage. This estimate shows the yearly saving and a projection of the floating homestead.
What is a floating homestead exemption?
A limit on how much the taxable value of a homestead can grow each year, typically tied to inflation.
When is the deadline?
April 1 with the Fulton County Board of Assessors or DeKalb County Property Appraisal.
Do seniors get more?
Yes. Fulton, DeKalb, the city and the schools offer additional exemptions for older homeowners, some based on income.
Sources
Disclaimer
This calculator provides estimates for educational purposes only and is not financial, tax, legal, real estate, or insurance advice. Consult a licensed professional before making decisions.