Inbound International Tax

Foreign entities and individuals entering the US market face a distinct set of tax challenges. The United States imposes tax on income that is effectively connected with a US trade or business, and the rules governing when a foreign person crosses that threshold -- and what obligations follow -- are nuanced and heavily fact-dependent. At Lanphier LLP in Denver, we specialize in helping foreign businesses, investors, and individuals understand and comply with their US tax obligations from the moment they begin operating in or deriving income from the United States.

Whether you are a foreign corporation establishing a US subsidiary, a foreign individual accepting employment in Colorado, or an overseas investor acquiring US real estate or business interests, our team provides the technical guidance you need to structure your US activities efficiently and stay in full compliance. We work closely with your foreign tax advisors to ensure that cross-border planning is coordinated and that no obligation is overlooked on either side.

Core Inbound Tax Services

US Entity Structuring

The decision to operate in the US through a branch, LLC, C corporation, or other entity has significant implications for US taxation, withholding, and reporting. We advise foreign clients on the optimal structure for their US activities, taking into account applicable tax treaties, state tax considerations, and repatriation planning. Denver and Colorado have become increasingly attractive destinations for foreign investment, and we understand the local landscape as well as the federal rules.

Effectively Connected Income and FIRPTA

Determining whether income is effectively connected with a US trade or business (ECI) is often the central question in inbound taxation. We analyze our clients' US activities, apply the relevant statutory and treaty rules, and advise on structuring alternatives to manage US tax exposure. For real estate investments, we navigate the Foreign Investment in Real Property Tax Act (FIRPTA) rules to minimize withholding and optimize after-tax returns.

Withholding and Reporting Compliance

Foreign persons receiving US-source income are subject to withholding requirements that vary depending on the type of income, the recipient's treaty status, and the nature of the activity. We ensure that all withholding obligations are met, treaty benefits are properly claimed, and required returns -- including Forms 1120-F, 1040-NR, and related schedules -- are prepared accurately and filed on time.

Treaty Planning

The United States maintains income tax treaties with dozens of countries, and these treaties can significantly reduce or eliminate US tax on certain categories of income. Our Denver team has deep experience applying treaty provisions to inbound transactions, including permanent establishment analysis, reduced withholding rates, and the interplay between treaty and domestic law.

If you are a foreign business or individual with current or planned US activities, contact our Denver office to discuss your situation. Early planning is essential to avoid costly missteps and take full advantage of available tax benefits.