Some do and many do not, and the dividing line is the size of the gain after the Section 121 exclusion is applied. A seller who meets the ownership and use tests can exclude up to $250,000 of gain, or $500,000 on a joint return (Internal Revenue Service, 2026). Gain means the sale price minus the seller basis and selling costs, not the sale price itself, so a St Simons Island homeowner pays capital gains tax only when that computed gain exceeds the exclusion available to them, or when the home does not qualify as their principal residence at all. For a long held island cottage bought decades ago and sold into a market where new construction reaches $1.1M to $1.9M (Redfin, 2026), the gain can be large enough to matter. For a recent buyer reselling at a modest increase, the exclusion commonly wipes the tax out entirely.

Basis is where the answer is really decided. Basis starts with what the owner paid, grows with documented improvement costs, and for an inherited home generally resets to fair market value at the owner death, the stepped up basis that makes a prompt estate sale produce little or no taxable gain (Internal Revenue Service, 2026). Two neighbours selling identical cottages for identical prices can owe completely different tax because their bases differ by hundreds of thousands of dollars. Owners mapping their own position will find the inherited side of the question in the report on what taxes apply when selling an inherited property in St Simons Island, and the amount mechanics in the report on how much tax is owed when selling an inherited house.

Island cottage held for decades, the kind of long tenure that can produce a gain larger than the Section 121 exclusion
A long owned St Simons Island home whose sale gain is tested against the federal exclusion in this report.

Key Findings

  • Section 121 excludes up to $250,000 of gain for a qualifying seller, or $500,000 on a joint return (Internal Revenue Service, 2026).
  • The ownership and use tests look at the 2 of 5 year period before the sale (Internal Revenue Service, 2026).
  • Tax applies to gain above the exclusion, computed as price minus basis and selling costs, never to the full price (Internal Revenue Service, 2026).
  • An inherited home generally takes a stepped up basis at fair market value on the date of death (Internal Revenue Service, 2026).
  • The Georgia transfer tax, $1 per $1,000 of consideration, is a closing charge and is separate from capital gains tax (Georgia Department of Revenue, 2026).

Who qualifies for the Section 121 exclusion?

Qualification turns on ownership and use. The governing guidance sets ownership and use tests over the 2 of 5 year window ending on the sale date (Internal Revenue Service, 2026), and Publication 523 works through the eligibility rules, the exceptions and the worksheets in full (Internal Revenue Service, 2026). A married couple filing jointly can reach the $500,000 exclusion when the tests are met for both spouses as the guidance specifies. A seller who used the exclusion on another sale inside the lookback period the rules describe may find the current sale restricted, which is one of several details the publication rather than a summary should settle for an individual household.

Second homes and investment use complicate the picture, and island properties live in exactly that grey zone. A cottage used as a vacation home rather than a principal residence does not earn the exclusion for the period it was not the main home, and periods of rental or non qualified use can reduce what is excludable under the detailed rules. The documented position in this report is deliberately plain: the exclusion belongs to the principal residence that passes the tests, and any island property with a mixed history of personal use, rental use and vacancy needs its own computation before a seller assumes the tax is zero.

What is not in doubt is the order of operations. Establish the residence status and the tests first, then compute the gain, then apply the exclusion, then tax only what survives. Sellers who start from the price and panic, or start from a neighbour story and relax, have both skipped the steps that decide the answer. The demand side of the market, including the buyer types described in the report on what types of homes buyers are looking for in St Simons Island in 2026, sets the price; the tax computation then proceeds from documents the seller controls, not from who bought the house.

How is the gain actually computed?

Gain is the amount realised minus basis. The amount realised is the sale price reduced by selling costs, which is where the selling ledger re-enters the tax story: commissions of 5 to 6 percent and closing costs of 1 to 2 percent, $33,000 to $44,000 combined on a $550,000 sale (Frontier Capitals, 2026), reduce the amount realised and therefore reduce the taxable gain. Basis is the owner investment as the tax rules define it: purchase price, plus documented capital improvements, minus any depreciation claimed where the property had rental or business use, a computation Publication 544 addresses for dispositions and depreciation recapture (Internal Revenue Service, 2026).

Records decide how much of that basis a seller can prove. The deed and closing records for the original purchase sit in county records (Glynn County Clerk of Superior Court, 2026), and parcel records help establish the property history (Glynn County Tax Assessor, 2026). Improvement invoices are the seller own file to keep, and at island price levels every documented $10,000 of improvement basis is $10,000 of gain that is never taxed. Owners who renovated a 1968 cottage for $75,000, the documented illustration in this research, hold basis evidence worth real money at sale time (Frontier Capitals, 2026), even though that same renovation returned only $50,000 to $65,000 of price for a live in buyer and nothing toward a land buyer valuation.

Appreciation supplies the other side of the subtraction. House price index data for coastal Georgia tracks the long rise that turns an old purchase price into a large paper gain (Federal Housing Finance Agency, 2026), and recorded island prices show new construction at $1.1M to $1.9M against an average older home at 23.1 percent of new build price (Frontier Capitals, 2026; Redfin, 2026). A homeowner who bought in a different price era and sells today is not being taxed on effort or luck in the abstract; the gain is the measured distance between two documented numbers, the basis going in and the amount realised coming out, with automated valuation estimates playing no part in it at all.

What changes for inherited and investment property?

Inherited property receives the most favourable basis rule in the documented material: basis at fair market value on the date of the previous owner death (Internal Revenue Service, 2026). A cottage worth $550,000 at inheritance and sold promptly for about that figure produces little or no gain, so little or no tax, whatever the original owner paid decades earlier. Delay changes the result only by the appreciation after the date of death, which becomes the heirs gain. That is why the research treats the stepped up basis as favouring a prompt sale, and why estates weighing timing should read the basis rule alongside the probate sequence, including the report on whether an inherited house can be sold immediately in St Simons Island.

Investment property follows different rules entirely. Property held as an investment does not earn the principal residence exclusion, and the documented guidance points investor sellers toward like kind exchange treatment under Section 1031, where a qualifying exchange defers the gain into a replacement property, with Publication 544 covering exchange rules and depreciation recapture (Internal Revenue Service, 2026). Depreciation claimed during the holding period returns to the computation at sale as recapture, another reason the investor file and the homeowner file should never be mixed. An island house that spent years as a rental before its sale can carry both histories, and the allocation between them is a computation for the seller tax adviser on the actual records, not a question this report invents an answer for.

Demographic context explains why these cases are common here rather than rare. The island housing stock includes a substantial share of older, long held and second homes, so executors, relocating owners and former landlords appear among sellers every season. Each category has its own basis rule, and the categories, not the cottages, determine the tax.

Which sale charges are taxes and which are not?

Confusion between closing charges and income tax costs sellers real planning errors, so the separation is worth stating directly. The Georgia transfer tax is a closing charge of $1 per $1,000 of consideration (Georgia Department of Revenue, 2026): $550 on a $550,000 sale, paid at the table, owed on every taxable transfer regardless of gain. Capital gains tax is an income tax computed later on the gain as described above, owed only when a taxable gain survives the exclusion. Property taxes prorated at closing are neither; they are a settlement of the current year bill between buyer and seller using county records (Glynn County Tax Assessor, 2026).

The distinction matters for cash planning. A seller can owe the transfer tax and prorations at closing and owe no income tax at all, because the exclusion erased the gain. Another seller can close with modest charges and face a substantial income tax the following spring on a gain that exceeded $250,000 or $500,000. Budgeting from the closing statement alone therefore understates the second seller position and overstates the first. The full proceeds method in the report on how much it costs to sell a house in St Simons Island keeps the layers separate for exactly this reason, and sellers in distress situations, where a sale also answers a lender deadline, should keep credit questions separate too, as the report on whether selling a house can prevent foreclosure from affecting credit explains on its own documented terms.

Closing documents beside a tax worksheet, separating the transfer tax paid at the table from the gain computed later
Paperwork distinguishing St Simons Island closing charges from the capital gains computation covered in this report.

How does the selling route affect the tax position?

The route changes the numbers inside the computation, not the rules. On the listed route, commissions and closing costs of $33,000 to $44,000 on a $550,000 sale reduce the amount realised (Frontier Capitals, 2026), which modestly reduces the gain. Repair credits of $10,000 to $25,000 negotiated after inspection have the same directional effect when they reduce the price. None of these deductions is large enough to rescue a gain that exceeds the exclusion by six figures; they trim the taxable amount at the margin.

A direct sale removes most selling costs, which slightly increases the amount realised relative to an identical price on the listed route, while its price is land based and usually lower than a listed household price for the same older home. Frontier Capitals buys directly as a wholesaler sourcing off market deals to builders, on documented terms: privacy with zero showings and no public marketing period; flexible closing in 7 to 21 days or months out with a leaseback; no commissions, saving $27,500 to $33,000 on the $550,000 example; no seller closing costs, for a combined $33,000 to $44,000 saved on that example; and no inspections or repairs, with the home sold as is and no $10,000 to $25,000 credits. For a seller whose gain sits far below the exclusion, the tax difference between routes is zero either way and the cost difference decides. For a seller near the exclusion boundary, the computation should be run both ways with real figures, because a lower direct price can also mean a lower gain, and the two effects pull in opposite directions.

Timing interacts with tax in one more documented way. The use and ownership tests run on the calendar, so a closing date can decide whether a seller qualifies at all, and a leaseback or a delayed closing of the kind the direct route offers can be used to land the sale inside a qualifying window rather than outside it. That is planning within the documented rules, and it is another reason a seller with a boundary case should compute before listing rather than after accepting an offer.

Established island street of long held homes, where differing purchase dates create differing tax outcomes at identical prices
Long owned St Simons Island homes whose owners face very different capital gains positions despite similar sale prices.

Methodology and limitations

This report states only the tax rules documented in the set source material: the Section 121 exclusion amounts and 2 of 5 year tests, like kind exchange treatment for investor held property, depreciation recapture as covered by Publication 544, and the stepped up basis for inherited property (Internal Revenue Service, 2026), together with the Georgia transfer tax rate (Georgia Department of Revenue, 2026) and the island selling cost bands from the sample research (Frontier Capitals, 2026). The sample itself is 17 older homes, 9 builder acquired, average price 23.1 percent of new build (Frontier Capitals, 2026).

No tax rate schedule, state income tax computation or individual eligibility determination is published in the source material, and none is invented here. Whether a specific seller owes tax depends on basis documents, residence history and filing status that only the seller records can establish. This report gives the framework and the documented figures; it is not tax advice for any individual sale, and boundary cases belong with the seller own tax adviser before a contract is signed.

Conclusion

St Simons Island homeowners pay capital gains tax only on gain that survives the Section 121 exclusion: up to $250,000 of gain, or $500,000 on a joint return, is excluded for a seller who meets the ownership and use tests. Long held homes sold far above their basis can still produce taxable gain above those amounts, inherited homes usually start again from a stepped up basis, and investment property follows the exchange and recapture rules instead. The transfer tax at closing is a separate, small and certain charge. Every one of those answers is found in the seller documents, in basis records and dates, rather than in the sale price alone.

Owners who want the selling cost side of their own computation priced, so the gain can be estimated on real numbers, can telephone Frontier Capitals at 401-219-4207 or email [email protected].

If you sold tomorrow, would your basis paperwork prove a smaller gain than the tax you have been quietly assuming you owe?

Frequently Asked Questions

Does every island seller owe capital gains tax?

No. A qualifying seller excludes up to $250,000 of gain, or $500,000 on a joint return (Internal Revenue Service, 2026). Sellers whose computed gain falls under their exclusion owe no capital gains tax on the sale at all.

Is the tax charged on the whole sale price?

No. Tax applies only to the gain: the price minus basis and selling costs such as commissions and closing charges. A $550,000 sale with a $400,000 basis has a gain near $150,000 before selling costs, not a tax bill computed on $550,000.

How does inheritance change the tax answer?

Property passed down through an estate ordinarily receives a basis equal to its fair market value when the prior owner died (Internal Revenue Service, 2026). A prompt sale near that value produces little or no taxable gain, which is why stepped up basis favours selling sooner rather than holding for further appreciation.

Is the Georgia transfer tax the same as capital gains tax?

No. The transfer tax is $1 per $1,000 of consideration, paid at closing on every sale (Georgia Department of Revenue, 2026). Capital gains tax is a separate income tax on the gain above any exclusion, settled through the tax return.

Do selling costs reduce the taxable gain?

Yes. Commissions and closing costs reduce the amount realised, and on a $550,000 listed sale those run $33,000 to $44,000 combined (Frontier Capitals, 2026). The saving is real but modest compared with the exclusion itself.

Sellers in St Simons Island also ask Can a House Be Sold During Probate If It Has Liens in St Simons Island?

Sources

  • Internal Revenue Service, 2026. Publication 523: Selling Your Home, Section 121 exclusion rules. Government data.
  • Internal Revenue Service, 2026. Publication 544, Sales and Other Dispositions of Assets: like-kind exchange rules and depreciation recapture. Government data.
  • Internal Revenue Service, 2026. Topic 701, sale of your home: $250,000/$500,000 exclusion and 2-of-5-year ownership and use tests. Government data.
  • Internal Revenue Service, 2026. Sale of residence: real estate tax tips: basis rules for inherited property. Government data.
  • Georgia Department of Revenue, 2026. Real estate transfer tax: $1 per $1,000 of consideration. Official record.
  • Frontier Capitals, 2026. 189 neighborhood builder acquisition sample: 17 homes sampled in 31522, 9 acquired by builders, average older home price 23.1 percent of new build. Market data.
  • Glynn County Clerk of Superior Court, 2026. Recorded deeds and plat records for 31522. Official record.
  • Glynn County Tax Assessor, 2026. Parcel and permit records, St. Simons Island GA. Official record.
  • Redfin, 2026. Recently sold homes and new construction, ZIP code 31522, St. Simons Island GA. Market data.
  • Federal Housing Finance Agency, 2026. House Price Index data for coastal Georgia markets. Government data.