What if you bring back more than 1 liter of alcohol into the US?

If you bring back more than 1 liter of alcohol into the U.S., you may be subject to additional duties and taxes. The U.S. Customs and Border Protection (CBP) allows travelers 21 years and older to bring up to 1 liter of alcohol duty-free for personal use. Any amount over that limit may incur a duty fee, and you must declare all alcohol to customs upon entry. Failure to declare can result in penalties or confiscation of the alcohol.