The question arrives in almost every serious conversation about offshore real estate: if I sell my Cayman condo or my Tuscany farmhouse, do I owe US capital gains tax? The answer is yes — regardless of what the local jurisdiction taxes, regardless of whether you remit the proceeds to the United States, and regardless of how long you have owned the property. American citizens pay US tax on gains from the sale of foreign real estate. The structure of that tax obligation is what requires careful planning.
The basic framework
A US citizen who sells foreign real estate held for more than one year recognises a long-term capital gain — the difference between the adjusted basis of the property (purchase price plus capital improvements plus allowable additions) and the net sale proceeds. This gain is reported on Schedule D of the US federal tax return and taxed at long-term capital gains rates: 0% for taxpayers in lower income brackets, 15% for most taxpayers, and 20% for taxpayers in the highest income bracket.
The net investment income tax — NIIT — applies at 3.8% on the lesser of net investment income or the amount by which modified adjusted gross income exceeds $200,000 for single filers or $250,000 for married filing jointly. The effective US capital gains tax rate for high-income American sellers of foreign property is typically 23.8% — the 20% long-term rate plus the 3.8% NIIT.
The foreign tax credit — when it applies and when it does not
If the country where the property is located imposes capital gains tax on the sale, the American seller may be able to claim a foreign tax credit against their US tax liability. This prevents double taxation — paying both foreign and US capital gains tax on the same gain. The credit is limited to the US tax attributable to the foreign income, and complex calculation rules apply to ensure it does not offset tax on US-sourced income.
The critical limitation: the foreign tax credit only helps if you actually paid foreign tax. Zero-tax jurisdictions — Cayman Islands, Turks & Caicos, Dubai — impose no capital gains tax on property sales. There is no foreign tax to credit, and the full US capital gains obligation applies without offset. Italy and Greece impose local capital gains tax in various circumstances — those taxes generate a credit that reduces the US liability. The interaction is market-specific and requires calculation for each transaction.
"The zero-tax jurisdiction marketing is not wrong — Cayman genuinely has no capital gains tax. What it omits is that American sellers of Cayman property owe full US capital gains tax regardless. The local tax picture is only half the story for Americans."
The primary residence exclusion — does it apply to foreign homes?
The Section 121 exclusion — which allows US taxpayers to exclude up to $250,000 ($500,000 for married couples filing jointly) of capital gain from the sale of a primary residence — can apply to a foreign property if it meets the ownership and use tests. The taxpayer must have owned and used the property as their primary residence for at least two of the five years preceding the sale. A vacation home used a few weeks per year does not qualify. A property where the taxpayer actually lived as their primary residence for the qualifying periods does qualify.
For the American who has genuinely relocated to Italy under the 7% flat tax programme, lived in their Sicilian property as a primary residence for two or more years, and then sells — the Section 121 exclusion is potentially available. This is a meaningful planning point for buyers who are genuinely relocating rather than maintaining a second home.
The currency gain complication
When an American buys property in a foreign currency — euros, Thai baht, UAE dirhams — and later sells it, there are potentially two separate gain calculations. The gain in the local currency is a property gain. The appreciation of the local currency against the US dollar between purchase and sale is a currency gain, which is treated as ordinary income rather than capital gain under US tax rules. This can convert what appears to be a long-term capital gain into ordinary income for the currency-appreciation component.
Properties purchased in US dollars — Cayman Islands, Dubai where transactions typically occur in USD — do not have this currency gain issue. Properties in euro-denominated markets — Italy, Greece, Portugal, Montenegro — do. The magnitude of the currency gain depends entirely on exchange rate movements during the holding period and can be significant over long holds.
State income tax
Americans who are residents of states with income tax — California, New York, Massachusetts — owe state income tax on foreign property capital gains in addition to federal tax. California taxes capital gains at ordinary income rates up to 13.3% with no preferential rate for long-term gains. The combined federal plus California state tax on a large foreign property gain can approach 37% for high-income taxpayers. Florida, Texas, Nevada, and other zero-income-tax states provide meaningful additional benefit for offshore investors who are already considering their domicile structure.
The depreciation recapture issue
American owners of foreign rental property who have taken depreciation deductions on their US tax returns must recapture those deductions upon sale at ordinary income rates up to 25%, regardless of the long-term capital gains rate that applies to the remaining gain. Buyers who have aggressively depreciated foreign rental property should model the depreciation recapture tax liability as part of their hold or sell analysis. This is a frequently overlooked component of the total tax cost of a foreign property disposition.