When American buyers first sit across from me to talk about a villa in Cannes or an estate on Cap d'Antibes, the conversation almost always turns, sooner or later, to a single anxious question: "Will I be taxed twice?" It is one of the most persistent fears I hear from Silicon Valley founders and New York executives, and it is one of the most misunderstood. The good news is that the relationship between your two countries is not a bureaucratic ambush waiting to happen. It is governed by a long-standing bilateral agreement designed to keep exactly that from occurring.
Having lived on both sides of the Atlantic — years in California, including time based near Atherton, before I came home to the Riviera to sell real estate — I have watched clients talk themselves out of beautiful properties over tax fears that dissolve the moment they understand how the framework actually works. So let me walk you through it the way I would over coffee overlooking the Croisette.
What the Treaty Actually Is
The United States and France have maintained an income tax treaty for decades, along with a separate convention addressing estate and gift matters. The purpose of these agreements is elegantly simple: to prevent the same income or the same asset from being taxed in full by both nations. Instead of leaving cross-border taxpayers exposed to two systems pulling in opposite directions, the treaty sets out rules that decide which country gets the first claim, and how the other country must give credit so that you are not penalized for having a foot in each world.
For an American buying a luxury home on the Côte d'Azur, this framework is the quiet safety net beneath nearly every financial decision you will make — from the rental income your villa might generate to the eventual sale or inheritance of the property.
Real Property Follows the Ground It Sits On
The first principle that reassures most of my clients is this: income derived from real estate is generally taxable in the country where the property is located. Your villa in Mougins sits on French soil, so France has the primary right to tax the income it produces and, later, any gain on its sale.
That may sound like bad news until you understand the second half of the equation. As a US citizen, you remain taxable on your worldwide income regardless of where you live — the United States is unusual in taxing based on citizenship. But the treaty and the US foreign tax credit mechanism are built to prevent this from becoming double taxation. In broad terms, the French tax you pay on French-source income can be credited against, or otherwise relieved on, your US return, so you are not paying the full weight of both systems on the same euro. The result is that you generally end up paying the higher of the two effective rates rather than the sum of them.
Rental Income From Your Riviera Villa
Many of my American buyers intend to spend part of the year in France and rent their property during the weeks they are away — a very sensible way to offset carrying costs when a home sits empty during the Cannes Film Festival or the height of the Saint-Tropez season. Rental income earned from a French property is reported and taxed in France first. You will still disclose it on your US return, but the treaty framework and foreign tax credits are designed to keep you from being taxed twice on the same rental profit.
How the income is characterized in France — furnished versus unfurnished, occasional versus professional letting — can meaningfully change your French tax treatment, and this is precisely the kind of detail that rewards good advice before you buy rather than after.
Capital Gains When You Sell
The same logic extends to the day you decide to sell. A gain on the sale of French real estate is taxable in France, where specific rules and holding-period considerations apply to secondary residences owned by non-residents. The United States will also look at that gain because of citizenship-based taxation, but again the treaty and credit system exist to relieve the overlap. In practice, clients are often relieved to learn that the French holding-period mechanics can soften the tax on a long-held property considerably.
The Estate and Inheritance Dimension
Where the treaty framework becomes truly valuable — and truly complex — is in estate planning. France and the United States take very different philosophical approaches to inheritance. France applies forced heirship rules that reserve portions of an estate for children, and its inheritance tax is levied on the beneficiary. The US estate tax, by contrast, is levied on the estate itself and offers a large exemption. A separate US-France estate and gift tax convention coordinates these two systems so that families are not caught between them, and it can allow certain credits and reliefs that a purely domestic plan would miss.
This is the area where I most strongly urge clients not to improvise. The interaction of French forced heirship, ownership structures such as an SCI, and US estate planning is genuinely intricate, and the right structure chosen at the moment of purchase can protect your heirs for decades.
A Word of Caution — and Encouragement
I want to be candid about something. I am a real estate advisor, not your tax counsel, and the details of any treaty change over time and apply differently to each family's situation. Rates, thresholds, and definitions shift, and your residency status, the way you hold title, and your broader US financial picture all matter enormously. Nothing here is a substitute for sitting down with a licensed French notaire and a qualified cross-border tax advisor who can model your specific circumstances. I work alongside these professionals on nearly every American transaction, and I will happily introduce you to trusted ones.
What I can tell you with confidence is that the treaty exists precisely so that people like you can own a home on the most beautiful coastline in the world without being financially punished for the privilege. The framework is not a trap. It is a bridge — one built deliberately between two countries that expect their citizens and residents to move, invest, and belong on both shores.
In more than a few closings, I have watched a client's shoulders drop with relief when they finally understand this. The dream of a villa above the Mediterranean does not have to come with a hidden double bill. With the right advisors beside you, it comes with clarity — and with a set of keys.
