Learn more about foreign entities
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Planning to expand your business across state lines? Learn about foreign entity registration and how to operate legally outside your home state.

Businesses often want to expand across state lines. Foreign entity registration allows them to operate legally outside their home states.
A company must organize or incorporate in one state, but business activities often extend across state lines. A foreign entity is a business organization, such as a corporation or limited liability company (LLC), that does business in a state other than the one where it is incorporated or organized. If a company has a physical presence or engages in significant business activities in another state, it usually needs to register there as a foreign entity under that state’s laws. Foreign LLCs and corporations must register with the Secretary of State and maintain good standing in that state.
Every state has a Secretary of State's office that handles business entity formation. A business formed under the laws of a state has the legal authority to operate there. This is the entity’s “domestic” state.
Because state laws stop at the border, a company must obtain permission before doing business elsewhere. In those states, the company is considered a foreign entity. To operate legally, it must complete certain steps, which generally include:

Please note that, in this context, the term “foreign” refers to different states of the United States. Doing business across international borders involves treaties and other legal issues.
Yes, foreign entities can do business in another state, although they may have to register in that state.
The U.S. Constitution prohibits state governments from unreasonably interfering with commerce between two or more states. A U.S. state cannot, for example, prohibit all entities organized in another U.S. state from doing business there. However, states can require foreign entities to comply with their laws. That is why foreign qualification and registration are necessary.
A business entity that has a Certificate of Authority in a foreign state must remain in good standing in that state. This typically means following certain state laws about filing information reports and paying franchise taxes.
A foreign entity must register with another state’s Secretary of State when it “does business” in that state. The definition of “does business” may vary from one state to another, but there are some common features.

A business that maintains a physical presence in a state most likely needs to register. This includes offices, warehouses, and retail locations.
Merely owning real estate does not necessarily count as “doing business.” For example, a company that owns an unused or vacant property might not need to register.
A business that employs people in a state develops economic ties to that state through payroll taxes and employment laws. This is often enough to require registration in many states.
Remote work has made this more common, as employees can now work from different states.
Having a significant number of contractual obligations in a state may count as “doing business” for foreign registration purposes. This can be subjective, but certain factors increase the likelihood that registration is required:
A business that earns a significant portion of its revenue from a foreign state might need to register there. The internet and e-commerce have made this analysis more complicated.
Whether a company needs to register often depends on the nature and size of its revenue from the foreign state:
Failing to register as a foreign company can create serious business challenges, even if it doesn’t void your contracts or shield you from liability.
The Secretary of State may impose fines or back fees for operating without a Certificate of Authority. In some states, individuals who conduct business on behalf of an unregistered foreign entity can also face personal penalties.
An unregistered foreign entity is typically barred from filing or maintaining a lawsuit in that state’s courts until it becomes properly registered. However, this does not invalidate the company’s existing contracts or prevent others from suing it. Once the business obtains its Certificate of Authority and pays any required penalties, it can usually proceed with its legal claims and restore full access to the courts.
If you still have questions about business formation or expanding into another state, ask one of our attorneys for personalized guidance.
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Laura Bojart is an SEO copywriter and editor at Rocket Lawyer. She researches legal and business topics and translates complex ideas into clear, practical content for everyday readers. With her background in journalism and endless curiosity, she approaches each subject by asking the questions readers are likely to have first, making legal information approachable and easy to understand even to those with no legal background.