Understanding ITIN vs EIN is one of the first practical steps for nonresidents doing business in the United States. The two numbers serve different purposes: an ITIN identifies an individual for U.S. federal tax reporting, while an EIN identifies a business or other entity. Choosing the wrong one—or assuming you need both immediately—can delay bank account opening, tax filings, or company compliance.
For international and Hungarian entrepreneurs, the confusion is understandable. Many countries use one tax number for both personal and business matters. In the U.S., the system is more segmented, and the correct tax ID depends on who is being identified, what filing is required, and whether the person is eligible for a Social Security Number.
What Is an ITIN?
An Individual Taxpayer Identification Number, or ITIN, is issued by the IRS to individuals who need a U.S. federal tax identification number but are not eligible for a Social Security Number. It is commonly relevant for nonresident individuals who have U.S. tax filing obligations.
An ITIN for foreign entrepreneurs may be needed if the individual must file a U.S. personal tax return, report U.S.-source income, claim certain treaty positions, or comply with tax reporting connected to ownership in a U.S. business. For example, a nonresident member of an LLC taxed as a partnership may need an ITIN to properly report their share of income or loss.
It is important to understand what an ITIN does not do. It does not authorize employment in the United States, provide immigration status, or function as a work permit. It is a tax processing number only.
What Is an EIN?
An Employer Identification Number, or EIN, is the federal tax ID used by businesses and certain other entities. It is often described as a company’s U.S. business tax ID. Corporations, multi-member LLCs, partnerships, and many single-member LLCs need an EIN for tax filing, banking, payroll, and compliance purposes.
An EIN for nonresident business owner situations is common. A foreign individual can own a U.S. LLC or corporation, and the company may obtain an EIN even if the owner does not have a Social Security Number or ITIN. However, the application process may differ from the standard online method, especially where the responsible party does not have a U.S. taxpayer identification number.
An EIN is often needed for:
- Opening a U.S. business bank account;
- Filing federal business tax returns or informational returns;
- Hiring employees and handling payroll tax matters;
- Reporting a foreign-owned U.S. disregarded entity, where applicable;
- Providing tax forms to payment processors, vendors, or platforms.
ITIN vs EIN: The Key Differences
The simplest distinction is this: an ITIN belongs to an individual, while an EIN belongs to a business or entity. A foreign founder may eventually need both, but they are not interchangeable.
- ITIN: Used by an individual for U.S. federal tax reporting when the person is not eligible for an SSN.
- EIN: Used by a business entity for tax filings, banking, payroll, and IRS identification.
- ITIN: Does not create a business entity and does not replace an EIN.
- EIN: Does not satisfy an individual owner’s personal tax filing identification requirement.
For example, a Hungarian entrepreneur forming a Delaware or Wyoming LLC may apply for an EIN for the company. Separately, the owner may need an ITIN if they must file a U.S. individual income tax return or are required to be identified personally on certain tax filings.
The IRS Responsible Party: Why It Matters
When applying for an EIN, the IRS requires a responsible party. This is the individual who ultimately owns or controls the entity, or who exercises effective control over the company’s funds and assets. The IRS generally expects a real person, not merely a nominee or a formation agent.
For nonresident-owned companies, identifying the responsible party correctly is important. If the owner is a foreign individual with no SSN or ITIN, the EIN application may still be possible, but it must be completed in the correct format. In some cases, the application is submitted by fax, mail, or other IRS procedures rather than through the standard online EIN system.
If the responsible party changes later, the company should update the IRS using the appropriate form. This is a common issue when ownership changes, a founder exits, or a holding structure is reorganized.
Do You Need an ITIN Before Getting an EIN?
Not always. A nonresident owner can often obtain an EIN for a U.S. company without first obtaining an ITIN. This is especially relevant for foreign founders who form a U.S. LLC or corporation before they have any personal U.S. tax filing history.
However, an ITIN may still be needed later. Common triggers include personal U.S. tax filings, certain withholding tax matters, partnership reporting, or treaty-related positions. Timing matters: applying too early without a valid tax reason may result in rejection, while applying too late can delay required filings.
Practical Guidance for Nonresident Founders
Before applying for any U.S. tax ID, clarify the business structure and expected tax treatment. A single-member LLC owned by a foreign person may have different reporting duties than a corporation or a partnership. The state of formation, place of management, customer base, and whether the company has employees can also affect tax and compliance obligations.
Nonresident entrepreneurs should keep the following points in mind:
- Forming a U.S. company does not automatically create U.S. immigration status or work authorization.
- An EIN is usually essential for operating the business, but it is not a business license.
- An ITIN is personal and should be obtained only when there is a valid tax reason.
- Banking, payment processing, and tax compliance may require additional documentation beyond an EIN.
- The company’s IRS records should match its ownership and management reality.
For foreign and Hungarian business owners, the right approach to ITIN vs EIN depends on the company structure, the owner’s U.S. tax position, and the planned business activity. Careful setup at the beginning can help avoid IRS delays, banking problems, and unnecessary corrections later.
