Home » Resources » What Is a Permanent Establishment? A Primer on Cross-Border Tax Exposure
October 28, 2026
Every country your business touches is evaluating whether your presence is substantial enough to tax it.
That threshold is called a permanent establishment (PE). PE rules vary by country but often have similar components. An office almost always creates one, but so can a sales agent or a remote employee working from home, depending on the jurisdiction.
Here’s what creates a PE, how U.S. tax treaties reduce the risk for U.S. businesses abroad and foreign businesses in the United States, and what businesses can do to manage PE-related risks.
PE is a tax treaty concept that sets the minimum level of business presence a country needs before it can tax a foreign business’s profits. Under most U.S. tax treaties, a country can tax a business’s profits within its borders only after it has established a PE there.
Most U.S. tax treaties generally recognize two paths to a PE:
Treaties also provide exceptions for activities that don’t create a PE. For example, storing inventory or displaying, purchasing, or delivering goods are unlikely to establish a PE on their own. The U.S. Model Income Tax treaty also specifies that a construction project creates a PE only if it lasts more than 12 months.
PE rules vary by country, which is why it’s important to work with an international tax expert to identify the specific PE rules for each country where you do or plan to do business.
PE also applies in two directions:
When a U.S. company sends employees, agents, or assets to another country, whether the activity amounts to a PE depends on the country’s rules and the terms of its tax treaty with the United States, if one exists.
If the two countries don’t have a tax treaty, there’s no treaty PE threshold to rely on. Instead, that country’s domestic rules apply, and they often set a much lower bar. In some countries, a business that merely solicits sales can be taxed.
A foreign PE also affects the domestic company’s U.S. income tax return. Although foreign tax credits may soften the effect of U.S. taxation, filing obligations are often still complex and require the assistance of an experienced international tax advisor.
When a foreign business operates in the United States, treaties work the same way but in reverse. Without a treaty, a foreign company is subject to U.S. tax on income effectively connected with a U.S. trade or business. That’s also a far lower bar than PE, resulting in potentially greater tax risk.
Under U.S. case law, a trade or business generally exists when activity is continuous, regular, and engaged in for profit. Courts have often found that ongoing U.S. sales activity can generate a taxable presence even if the company has no U.S. office.
However, if a treaty is in place, U.S. tax usually applies only to profits attributable to the PE. If a PE exists, a foreign company (assuming it is treated as a corporation for U.S. tax purposes) pays U.S. tax on the PE profits at a 21% rate. A 30% branch profits tax can apply on top of that when those profits are treated as sent home, but many treaties reduce or eliminate that rate.
To benefit from preferential treaty terms, foreign businesses must meet specific requirements and may need to make a few filings. Having an international tax advisor involved early can help confirm eligibility, file correctly, and avoid penalties.
For example, the United States requires that a foreign company’s income tax return be filed within 18 months of its original due date in order to claim deductions for net income taxation. Without the filing of a return, gross income taxation generally applies, which means that the foreign company cannot claim deductions or credits to reduce its taxable income. Foreign companies should work with an advisor to understand when it is helpful to file a U.S. protective income tax return with or without a U.S. international income tax treaty in place.
Warning: Treaty Protection Doesn’t Always Apply at the U.S. State Level
U.S. tax treaties generally bind the federal government, not each U.S. state. Each state applies its own nexus rules that decide whether a foreign company owes income or franchise tax.
Nexus can arise from physical presence (such as a remote employee or inventory in a warehouse) or from economic nexus standards (usually based on sales made in the state). As a result, a foreign company that owes no federal income tax because it lacks a PE can still have state filing obligations. Treaties also don’t address non-income taxes, such as sales and use taxes or gross receipts taxes.
For foreign companies, a state nexus study is essential because U.S. tax filing obligations rarely end with the federal government.
PE exposure usually builds quietly as a business grows. Here are some of the ways that international tax advisors keep tabs on your firm’s global tax exposure:
Even when your business operations do not create a PE, there may still be other ways that a local jurisdiction can collect tax. For example, a jurisdiction may impose a withholding tax on gross income generated in that local jurisdiction, requiring a payor (typically a customer) to withhold and remit a statutory amount of tax based on the income you receive that is sourced to that jurisdiction.
Let’s say your business’s tax home is Country A but also licenses a patent for use in Country B. Although the business does not have a PE in Country B, the jurisdiction still imposes a withholding tax of 30% on the business’s gross licensing revenues sourced to Country B. The withholding tax obligates the licensee to withhold 30% of the money it owes your business and remit it to the tax authorities in Country B.
Where the income is sourced determines which jurisdiction has the right to impose withholding taxes. Income may be sourced based on the payor’s location, where the benefit is received, where the work was performed, or another place, depending on the type of income and the jurisdiction’s sourcing rules. Some jurisdictions impose a withholding requirement on all non-local vendors, even if the income is not sourced to that jurisdiction. Often, income tax treaties can reduce or eliminate the withholding tax burden, but additional documentation may be needed to substantiate the reduced rates.
And even when the withholding tax rate has been reduced, the taxpayer must still contend with its home country’s tax rules to determine how much, if any, of that tax is eligible for a foreign tax credit to reduce potential double taxation.
Whether you’re a U.S. company expanding overseas or a foreign business entering the U.S. market, a PE analysis can prevent unexpected tax bills, penalties, and double taxation.
Smith + Howard’s international tax team can evaluate your treaty positions, work with our state and local tax specialists to assess your state exposure, and help you structure your operations with confidence.
Contact Matt Halpern, Smith + Howard’s International Tax Principal, to get started.
If you have any questions and would like to connect with a team member please call 404-874-6244 or contact an advisor below.
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