Top 5 Tax Pitfalls Foreign-Owned US Companies Must Avoid

Josh Katz, CPA
Author: Josh Katz, CPA
Updated: October 24, 2025

Running a business in the United States as a foreign-owned company can be both an exciting opportunity and a complex challenge. Whether you’re a foreign investor, a multinational corporation, or a family-owned business looking to expand, understanding US tax regulations is crucial. Failure to comply with the US tax code can lead to severe penalties, additional costs, and even damage to your business’s reputation.

Here, we will highlight the top five tax pitfalls foreign-owned US companies should avoid to ensure compliance and optimize their tax position.


1. Failing to Understand and Comply with US Tax Filing Requirements

One of the most common mistakes foreign-owned US companies make is failing to fully understand and comply with the intricate filing requirements. While it may seem like the obligations are similar to those for domestic companies, foreign businesses are subject to additional rules.

Key Filing Requirements:

  • Form 5472: Foreign-owned US corporations must file Form 5472 to report transactions between the US company and its foreign parent or related entities. This includes not only direct transactions such as purchases and sales, but also loans, guarantees, and other financial arrangements. Failing to file Form 5472 or filing it incorrectly can lead to penalties of $25,000 or more.
  • Form 1120: Foreign-owned US companies must file Form 1120, the US corporate income tax return, regardless of whether they have income. Even if the company is not profitable, it is required to file a return. Additionally, if the foreign entity is a disregarded entity (such as a single-member LLC), the filing requirements may change, but a tax return will still be necessary.
  • Branch Profits Tax: Foreign corporations with US branches must file Form 1120-F, and the IRS may apply a branch profits tax on any earnings the branch repatriates to the parent company. This tax is designed to mirror the withholding tax that applies to US dividends paid to foreign shareholders.

Pitfall to Avoid: Ignoring these filing requirements or missing deadlines can trigger steep penalties. In some cases, the IRS may disallow certain tax deductions or credits, increasing the company’s tax liability.


2. Misunderstanding the Tax Implications of Transfer Pricing

For foreign-owned US companies engaged in cross-border transactions with their parent company or affiliated entities, understanding and adhering to transfer pricing rules is essential. Transfer pricing refers to the pricing of goods, services, and intangible assets between related parties in different tax jurisdictions.

Under US tax law, foreign-owned US businesses must ensure that all intercompany transactions are conducted at “arm’s length,” meaning the terms of the transaction should be similar to what would be agreed upon by unrelated parties. Failure to adhere to transfer pricing rules can result in severe penalties, audits, and adjustments to taxable income.

Pitfall to Avoid: Many foreign-owned businesses underestimate the complexity of transfer pricing rules and fail to document the appropriate methodologies used for pricing transactions. Without proper documentation, the IRS may adjust the taxable income of the business, leading to additional tax liabilities and penalties.

To avoid this pitfall, foreign-owned companies should:

  • Keep comprehensive records of intercompany transactions.
  • Implement a well-documented transfer pricing policy.
  • Consult with tax professionals to ensure compliance with the US transfer pricing regulations, especially if the business operates in multiple countries.


3. Neglecting State Tax Obligations

While US federal taxes are a primary concern for foreign-owned companies, state taxes can also present significant challenges. Each state has its own set of tax laws and regulations, and foreign businesses may inadvertently overlook state-specific tax obligations.

Key Considerations for State Taxes:

  • Sales and Use Tax: If your business sells goods or services in the US, you may be required to collect state-level sales tax. Many states have economic nexus laws, meaning if your company reaches a certain threshold of sales or transactions in the state, you must collect and remit sales tax. Even if your company does not have a physical presence in a state, economic nexus laws could still apply.
  • State Income Tax: States like California, New York, and Texas have significant income tax rates, and some states, like Delaware and Nevada, offer tax advantages. However, your company must determine whether it meets the threshold for state income tax obligations, which may depend on factors such as where the business is conducting activities or generating income.
  • Property Taxes: States also assess taxes on the property your business owns, including real property, equipment, and other assets.

Pitfall to Avoid: Failing to research and comply with state tax obligations can result in fines, interest, and even the loss of the right to do business in the state. To avoid this, foreign-owned businesses should consult with state tax experts to understand their specific state-level responsibilities.


4. Overlooking Withholding Tax Requirements on US Source Income

Foreign businesses operating in the US are generally required to withhold taxes on certain payments made to foreign persons. This includes dividends, interest, royalties, and other forms of income. The withholding tax rates vary depending on the type of income and whether a tax treaty exists between the US and the foreign company’s home country.

Key Withholding Tax Considerations:

  • Withholding on Dividends: Dividends paid by US companies to foreign shareholders are subject to a 30% withholding tax, unless a tax treaty reduces the rate.
  • Interest and Royalties: Payments made to foreign entities for interest and royalties are also subject to US withholding tax, typically at a 30% rate.
  • Tax Treaty Benefits: Foreign companies may reduce their withholding tax rates if their home country has a tax treaty with the US. It’s important to understand which treaties apply and how to claim the benefits.

Pitfall to Avoid: Foreign-owned companies may fail to properly withhold taxes on US-source income or fail to claim the appropriate tax treaty benefits. This could result in IRS audits, penalties, and interest.

To avoid this, foreign companies should work with tax advisors to ensure they are withholding the correct amounts, filing the appropriate forms (e.g., Form 1042-S), and claiming any applicable tax treaty benefits.


5. Not Considering the Impact of Exit Taxes and Repatriation

When a foreign-owned US company decides to exit the US market or repatriate profits to the home country, several tax considerations come into play. These include exit taxes, repatriation taxes, and the tax implications of selling US assets.

Key Considerations for Exit and Repatriation:

  • Exit Taxes: If a foreign parent company decides to liquidate or transfer US assets, it may trigger exit taxes. These taxes can apply to the sale of assets, the transfer of shares, or the movement of intangibles across borders.
  • Repatriation of Profits: If profits are being transferred from the US to the foreign parent company, withholding taxes may apply. Companies should also consider the impact of the Global Intangible Low-Taxed Income (GILTI) regime and the Base Erosion and Anti-Abuse Tax (BEAT), which may affect repatriation strategies.

Pitfall to Avoid: Ignoring the potential tax consequences of exiting the US market or repatriating profits can result in unexpected tax liabilities. It’s crucial for foreign-owned US companies to plan ahead and consider the tax impact of these decisions.

Dealing with the tax landscape can be complex and daunting for foreign-owned companies operating in the United States. However, by understanding and avoiding these top five tax pitfalls, businesses can reduce their tax burden, remain compliant, and ensure long-term success. It is highly recommended that foreign companies consult with US tax professionals to ensure they adhere to the relevant tax codes and filing requirements and mitigate risks associated with international operations.