Does a foreign-owned US LLC pay US income tax?
Usually not on foreign income. A single-member US LLC owned by a non-resident with no US employees, office, or dependent agent generally has no US-source effectively connected income, so it owes no federal income tax. It must still file Form 5472 with a pro-forma 1120 every year, and US-source income can change this.
The general rule
US tax on a foreign-owned disregarded LLC turns on whether it has income effectively connected to a US trade or business. A founder selling digital products or services from abroad, with no US physical presence or US-based staff, typically has none, so there is no federal income tax due.
Filing is separate from paying
Owing no tax does not remove the paperwork. Form 5472 plus a pro-forma Form 1120 is mandatory every year, and its 25,000 dollar penalty applies whether or not any tax was due. This is not tax advice, and anyone with US customers, staff, or inventory should confirm their position with a US CPA.
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