If you are 62 or older and thinking about buying, selling, or downsizing in Marietta, Kennesaw, Smyrna, Acworth, or Vinings, the Cobb County senior school tax exemption is one of the most valuable and least understood numbers in the whole transaction. It is not a small discount. For qualifying homeowners it removes the county school tax line from the bill entirely, and in 2026 that line is roughly 62 percent of what an unincorporated Cobb homeowner pays. This guide explains exactly how the Cobb County senior school tax exemption works, how much it is worth on a real home, where the rules change inside the City of Marietta, and how it quietly shapes pricing and demand across Northwest Metro Atlanta.
What the Cobb County Senior School Tax Exemption Actually Does
According to the Cobb County Tax Commissioner, the Age 62 School Tax Exemption is "an exemption from all taxes in the school general and school bond tax categories." To qualify you must be 62 on or before January 1 of the tax year, own and occupy the home as your primary residence on January 1, and provide proof of age when you apply. There is no income limit listed, no asset test, and no minimum number of years you must have owned the home.
Once approved, the exemption renews automatically for as long as you own and live in the home. You only need to reapply if ownership changes, which matters for couples who retitle a home into a trust or add a family member to the deed. Cobb's online filing portal is open year round, and the county now allows you to submit for the current tax year any time before the appeal deadline printed on your Notice of Assessment. Miss that window and you wait until the following year.
The exemption is applied to the county school taxes that the Cobb County Tax Commissioner collects for the Cobb County School District. That covers unincorporated Cobb plus the cities that use the county school system: Kennesaw, Acworth, Smyrna, Powder Springs, Austell, and Mableton. Vinings is unincorporated Cobb, so it is covered too.
How Much the Cobb County Senior School Tax Exemption Is Worth in 2026
Here is where it gets concrete. Cobb's published 2026 millage sheet lists the County School General rate at 18.70 mills. The full county bill for an unincorporated homeowner is 30.13 mills, made up of 8.46 mills county general, 2.97 mills county fire, and 18.70 mills school. That means school taxes are about 62 percent of the county portion of the bill. In Smyrna and Austell, where the county fire line does not apply and the county bill is 27.16 mills, school taxes are closer to 69 percent.
Georgia assesses homes at 40 percent of fair market value. So the math on a few typical Northwest Metro price points looks like this, using the 2026 rates and the standard $10,000 basic homestead exemption that applies to the school general category:
- A $350,000 home in Kennesaw or Acworth: assessed value $140,000, less $10,000 homestead, times 18.70 mills equals about $2,430 per year in county school tax. The senior exemption removes it.
- A $500,000 home in East Cobb or Smyrna: assessed value $200,000, less $10,000, times 18.70 mills equals about $3,550 per year. Gone.
- An $850,000 home in Vinings: assessed value $340,000, less $10,000, times 18.70 mills equals about $6,170 per year. Gone.
Over a ten year retirement, the exemption on that $500,000 home is worth more than $35,000 before any future rate or value increases. That is real money, and it is the reason so many buyers from Fulton, DeKalb, and Gwinnett specifically target Cobb once they hit 62.
One caution on the arithmetic: these figures cover only the county school line. City taxes, county general, and fire still apply, and every bill is different. Run your own numbers with the Tax Commissioner's online estimator or ask us to pull the actual tax history on a specific property before you write an offer.
The Marietta Exception: Same Age, Different Rules
This is the detail that trips up buyers every year. The City of Marietta runs its own independent school system, Marietta City Schools, and it bills its own school tax. On the 2026 millage sheet, Marietta's Independent School General rate is 17.97 mills, and it appears on the city bill rather than the county bill. Because of that, the Cobb County senior exemption does not remove your school tax if you live inside Marietta city limits. You have to apply separately with the City of Marietta Tax Division at City Hall on Lawrence Street.
Marietta does offer its own school tax exemption at age 62, but with two differences worth knowing:
- The exemption is limited to no more than one acre of land. If you are eyeing one of the larger lots off Whitlock Avenue or Burnt Hickory Road inside the city, the acreage above one acre stays taxable for school purposes.
- Marietta describes April 1 as the absolute deadline. Applications filed after April 1 are processed for the following year. Cobb County's more flexible appeal-deadline window does not apply to the city filing.
So a 62 year old buyer closing on a Marietta home in May will owe a full year of city school tax before the exemption kicks in the following January, while the same buyer closing in unincorporated East Cobb may be able to file for the current year if they act before the assessment appeal deadline. That timing difference can be worth a few thousand dollars, and it is exactly the kind of thing a good agent should raise before you pick a closing date, not after.
Also remember that the Marietta city limits are irregular. A Marietta mailing address does not mean you are inside the city. Plenty of homes with a Marietta address are in unincorporated Cobb and attend Cobb County schools. Check the parcel on the Cobb GIS map or ask us to confirm which taxing authority applies before you assume anything.
How the Exemption Shapes the Northwest Metro Atlanta Market
The exemption is not just a line on a tax bill. It changes behavior, and if you sell or buy in Cobb you should understand the effects.
It anchors owners in place. A homeowner who has lived in an East Cobb ranch for twenty years and pays no school tax has very little financial reason to move. That is one contributor to tight resale inventory in established neighborhoods around Walton, Pope, and Lassiter, and in the older sections of Kennesaw near the mountain. Sellers in those pockets often have leverage that sellers in newer subdivisions do not.
It pulls in downsizers from other counties. Fulton, DeKalb, and Gwinnett all have senior school tax relief, but the eligibility ages, income tests, and dollar caps vary. Cobb's version is simple: 62, owner occupied, no income limit, full exemption. That simplicity drives demand for one level homes, ranch plans, and 55 and over communities in Acworth, West Cobb, and around Lake Allatoona.
It raises what a senior buyer can afford. A retired couple comparing a $500,000 home in Cobb against a similar home across the river in Sandy Springs could be looking at a monthly carrying cost difference of roughly $300 just from the school line, depending on whether they qualify for the more restrictive senior exemptions in Fulton. Lenders qualify on total housing payment, so that gap can be the difference between approval and a no.
It complicates the numbers in a listing. When a senior owner sells, the buyer's tax bill will be higher than the seller's, sometimes dramatically. If the listing shows last year's taxes at $1,800 and the buyer is 45, the real number after the sale might be $5,000. Buyers should always calculate taxes from the millage rate and the purchase price rather than trusting the seller's bill. Sellers should expect that question and be ready for it.
Practical Steps for Buyers Over 62 in Cobb
If you qualify or will soon, here is the sequence we walk clients through:
- Confirm the taxing jurisdiction of every home on your shortlist. Unincorporated Cobb, Kennesaw, Acworth, Smyrna, Powder Springs, Austell, and Mableton use the county school system. Marietta does not.
- Time the closing with January 1 in mind. You must own and occupy the home on January 1 to qualify for that tax year. A late December closing can be worth a full year of savings compared with an early January one.
- Remove your old exemption. Cobb will not grant a homestead exemption if you or your spouse still claim one in another county or state. Cancel the old one in writing first and keep the confirmation.
- File online through the Cobb Tax Commissioner's homestead portal, and apply for the basic homestead and the age 62 school exemption at the same time. Bring a Georgia driver's license showing the new address and proof of age.
- If the home is in Marietta, file with the city separately and do it before April 1.
Practical Steps for Sellers Whose Buyers May Be Seniors
If you are selling a ranch, a stepless entry home, or anything in a 55 and over community in Northwest Metro Atlanta, senior buyers are a core audience. Lead with the tax story in your marketing. State clearly whether the home sits in unincorporated Cobb or a city using the county school system, spell out the 2026 school millage, and show the estimated annual savings for a qualifying buyer at your list price. Most listings never mention it, which means the ones that do stand out.
Also be transparent about your current bill. If you already hold the exemption, note that the buyer's taxes will be recalculated. A buyer who discovers that on their own after going under contract feels misled. A buyer who hears it from you upfront trusts the rest of what you say.
What Could Change
The Cobb school board has no authority over the exemption. It was created through state law and can only be modified by the Georgia General Assembly, and in Cobb any attempt to study changes has historically been unpopular. The 2025 session did produce HB 92, which is the law behind the more forgiving late-filing window for county exemptions. We track these changes every session because they directly affect what our clients pay. If the rules shift, we will update this guide.
Work With The Corbin Team in Northwest Metro Atlanta
The Corbin Team helps buyers and sellers across the entire Atlanta metro, and we spend a lot of time in Cobb County helping people over 62 make the tax math work in their favor. Whether you are downsizing from a big house in East Cobb, relocating from another county to take advantage of the Cobb County senior school tax exemption, or selling a home that senior buyers will love, we will run the real numbers on every property before you commit. Call The Corbin Team at (678) 783-8937 to talk through your plan.
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