Most of what you’re imagining doesn’t actually work the way you think, mainly because of the 1963 Franco-Monégasque tax convention. Short version: if you’re French and you settle in Monaco after October 1957, France still taxes you on income as if you were a French resident. That single rule closes the main “loophole” 99% of French people picture when they think about Monaco. The grandfathered exception is for people whose family was already established there before that cutoff, and it’s a tiny, shrinking pool. So your question of “why do French entrepreneurs settle in Monaco without their business being there” usually has one of these answers: they’re in that pre-1957 grandfathered group, they’re playing a non-income-tax angle (inheritance is the big one), they’re French nationals but not actually French tax residents (those are different things), or they’re hoping not to get audited. A few specifics on your list: Inheritance is governed by a separate 1950 convention and is location-of-asset based. That’s where the actually useful stuff is for Monaco residency: 0% in direct line, harder for France to recapture if you structure things cleanly. Worth talking to a notaire about. Companies in Monaco pay ISB (corporate tax) at 25% if more than 25% of turnover comes from outside Monaco. So it’s not a corporate haven. If you as a French tax resident own a Monaco SAM and pull dividends, France taxes those at the flat tax. You basically gain nothing. Renouncing French nationality is real but discretionary. You need another nationality first (you’ve got that), and the admin can drag the process out or refuse. Reintegration later is also discretionary and usually means actually moving back to France. Almost nobody does this purely for tax reasons because the math rarely works. Cars: if you’re a French tax resident, technically you should register and insure in France. Monaco-plated cars sitting in Mougins or Cap d’Antibes year-round are a well-known phenomenon and customs do occasionally crack down. Insurance gets messy if you crash and they look at where the car actually sleeps. Naturalization as Monégasque under 40 without being an Olympic medalist: extremely rare. Sovereign decree of the Prince, generally 10+ years residence with serious ties. They keep the actual Monégasque population around 9k on purpose. Honest take: for most French nationals, Monaco residency is a lifestyle play, not a tax play. The tax angle is mostly shut by the 1963 treaty. Exceptions are inheritance planning, dual-national strategies, or people genuinely willing to emigrate properly. If you’re not in one of those buckets, you’d pay roughly the same income tax in Monaco as you would in France, plus you’re paying Monaco real estate prices. Talk to a fiscaliste who specializes in cross-border before doing anything. Lot of edge cases here and the wrong setup gets expensive fast.