Walk the superyacht docks in Fort Lauderdale or Newport and read the transoms: George Town, Bikini, Valletta. American owners, foreign registries. This is not tax exotica; it is the standard structure for large-yacht ownership, and a U.S. buyer commissioning a new build should understand it before the contract is drafted, not after delivery.
Why the Flag Goes Offshore
The registries that dominate large yachting, the Cayman Islands and the Marshall Islands chief among them, built their frameworks around this exact vessel class: survey regimes written for yachts, commercial coding that permits charter, and mortgage registries that lenders recognize and act on. The U.S. registry was built around commercial shipping, and its provisions for large private yachts are thinner. Owners flag offshore mostly because that is where the infrastructure for boats like theirs actually lives.
Importation Is a Choice With a Price
Flag and customs status are separate decisions. A foreign-flag yacht can be formally imported into the United States by paying duty, commonly 1.5 percent of value for large motor yachts as of this writing. Once imported, she is duty-paid: free to remain in U.S. waters indefinitely and, importantly, free to be offered for sale to U.S. residents here. For an owner who will keep the boat in Florida most of the year and expects to sell into the U.S. market eventually, the duty is often money well spent.
The Cruising License
An unimported foreign-flag yacht cruises U.S. waters under a cruising license issued by Customs and Border Protection, typically annually, for eligible flags. It permits private pleasure use, movement between U.S. ports, and it costs little. What it does not permit matters more: an unimported yacht generally cannot be offered for sale to U.S. residents while in U.S. waters, and the license must be managed, renewed, and respected. Owners who treat it as a formality tend to meet CBP under worse circumstances.
Charter Stops at the Coastwise Line
The Passenger Vessel Services Act of 1886 reserves the carriage of passengers between U.S. ports to qualified U.S.-flag, U.S.-built vessels. In practice, a foreign-flag yacht cannot run a charter from Miami to Key West. This single statute shapes the American charter map: itineraries are structured around it, and the U.S. Virgin Islands, with their particular status, anchor much of the legitimate foreign-flag charter activity in American waters. An owner planning U.S. charter income needs this analysis done before the build contract, because no amount of paperwork after delivery changes what the hull is allowed to do.
The State Tax Layer
Below the federal questions sits state tax, and it is why Florida holds so much of the American fleet. Florida caps its sales and use tax on a vessel at 18,000 dollars as of this writing, a rounding error on a large yacht, while some other coastal states apply uncapped rates that reach seven figures. Where the yacht is closed, delivered, and kept in her first months is a planned decision with the tax counsel at the table, made alongside flag and import status rather than after them.
None of these rules is an obstacle. Together they are a structure, and the owners who fare best are the ones whose flag, customs, charter, and tax decisions were made once, together, at the start.