In my years helping sellers move out of neighborhoods like Windward and Downtown Alpharetta, the same moment of panic shows up almost every time: a seller sees their equity number and immediately asks, "How much of this does the IRS take?" The honest answer depends on federal rules, Georgia's own tax code, and details buried in your closing paperwork — and most of the generic calculators you'll find online skip the Georgia part entirely.
Do You Actually Owe Capital Gains Tax When You Sell in Alpharetta?
Most Alpharetta sellers owe nothing at all, because the IRS Section 121 exclusion shelters up to $250,000 in profit for single filers and $500,000 for married couples filing jointly. Given that Alpharetta's median sale price sits between $764,542 and $785,000, many longtime owners fall comfortably under this threshold once commissions and closing costs are subtracted from their gain.
How the IRS Section 121 Exclusion Actually Works
To qualify under IRS Section 121 rules, you must have owned and lived in the home as your primary residence for at least 24 months out of the 5 years before closing — and those 24 months don't need to be one continuous stretch. This trips up more sellers than any other rule: the IRS only requires an aggregate of 730 days within that 5-year window, which matters if you rented the home out for a stretch or moved out temporarily before selling.
The Georgia Tax Quirk Most Sites Miss
Here's the piece I see left out of nearly every national real estate calculator: Georgia does not give real estate sellers a discounted long-term capital gains rate the way the federal government does. Georgia simply taxes your home sale profit as ordinary income at its flat rate — 5.19% for 2025, stepping down to 4.99% for tax year 2026 under state tax legislation via the Georgia Department of Revenue — which only applies to whatever gain exceeds your federal Section 121 exclusion.
If You're 62 or Older: Georgia's Retirement Income Exclusion
- Georgia's retirement income exclusion isn't limited to pensions and 401(k) withdrawals — according to Georgia Department of Revenue guidelines, it explicitly covers capital gains, including home sale profit.
- Sellers aged 62–64 can shelter up to $35,000 per person, and sellers 65 and older can shelter up to $65,000 per person, meaning a qualifying married couple 65+ can protect an additional $130,000 of gain from Georgia state tax on top of the federal exclusion.
How to Calculate Your Adjusted Cost Basis
Your taxable gain isn't simply sale price minus purchase price — it's sale price minus your adjusted cost basis, which starts with your original purchase price and closing costs, then adds every qualifying capital improvement you can document under IRS Publication 523. This is exactly why I tell every client in Windward and Downtown Alpharetta to start pulling receipts the day they decide to sell, not the week before closing.
What Capital Improvements Actually Count (vs. Repairs)
A kitchen remodel, roof replacement, finished basement, or HVAC system upgrade all increase your basis and directly shrink your taxable gain. Routine maintenance — interior painting, minor repairs, general upkeep — adds nothing to basis, even though it may help your home show and sell faster.
Selling Before Two Years? You May Still Get a Partial Exclusion
If you're relocating for a job more than 50 miles away, facing a documented health issue, or dealing with another qualifying unforeseen circumstance, the IRS prorates your exclusion based on how much of the 24 months you actually lived there. A family that lived in their Alpharetta home for 18 months before a corporate transfer along the GA-400 corridor, for example, could still claim roughly 75% of the full exclusion — up to $375,000 for joint filers.
What It Actually Costs to Sell in Alpharetta
On a median-priced $775,000 Alpharetta sale, expect the Georgia Real Estate Transfer Tax to run about $775 (calculated at $1.00 per $1,000 plus $0.10 per additional $100), with brokerage commissions typically running 5–6% of the sale price. These costs reduce your amount realized before the IRS ever calculates your gain, so they work in your favor at tax time even though they feel like a cost at closing.
Where Your Neighborhood Fits: Windward, Downtown, Ocee, and Beyond
Price per square foot varies meaningfully across Alpharetta submarkets — Downtown Alpharetta (ZIP 30009) has climbed to roughly $343/sq ft thanks to the City of Alpharetta Alpha Loop connecting to Avalon, well above the city's broader $267–$281/sq ft average. If you're weighing whether to sell now or wait, it's worth comparing your specific pocket against nearby Milton and Johns Creek submarkets rather than relying on a single citywide median.
Converted a Rental Back Into Your Primary Residence?
If you ever rented out the home or claimed a home office deduction, depreciation recapture applies at up to 25% and cannot be excluded under Section 121, even if the rest of your gain qualifies. Investors considering this route instead of a like-kind exchange should map out nonqualified use periods carefully before listing, since they reduce how much of the gain is excludable.
When It's Time to Loop In a Tax Professional
I'm not a CPA, and I always pair my sellers with one before we finalize pricing strategy once a gain looks close to the federal exclusion limits or involves prior rental use. What I can do is help you build an accurate net proceeds estimate up front, using real Alpharetta closing cost data instead of a generic national average — reach out and I'll walk your specific numbers with you before you list.
Curious what your home is actually worth in today's market before you run any tax numbers? Start with a current home value estimate for your address.