TIN vs. ITIN vs. EIN: What Foreign Investors Need to Know

The term TIN — taxpayer identification number — is a general category that includes several types of numbers the IRS uses to identify taxpayers. An ITIN and an EIN are both types of TINs, but they serve different purposes and are issued to different entities. Understanding which one you need — and when — avoids confusion during banking, tax filing, and loan processes.

An ITIN is an Individual Taxpayer Identification Number. It is issued to individuals who are not eligible for a Social Security Number but have a U.S. tax obligation. If you are a foreign national who owns U.S. property personally or through a disregarded LLC, you typically need an ITIN to file U.S. tax returns.

An EIN is an Employer Identification Number. It is issued to business entities — LLCs, corporations, partnerships, and others — by the IRS. If you form a U.S. LLC to hold your property, that LLC needs an EIN to open a bank account, apply for a mortgage, file taxes as a separate entity, and interact with lenders, title companies, and the IRS.

The EIN belongs to the company, not to you personally. A single investor who owns multiple LLCs may have multiple EINs — one per entity. The EIN does not replace an ITIN for the individual. Both may be needed: the EIN for the LLC's tax and banking purposes, and the ITIN for the owner's individual U.S. tax filing.

A common scenario: a foreign investor forms a single-member LLC in Florida. The LLC needs an EIN to open a bank account and to be recognized by the IRS. The individual investor — the LLC member — needs an ITIN to file a U.S. individual tax return reporting the income that passes through from the LLC. Both numbers are required; one does not substitute for the other.

Applying for an EIN for a U.S. LLC is generally straightforward and can often be done online or by phone through the IRS, though foreign-owned LLCs without a U.S. social security number may need to apply by fax or mail. Applying for an ITIN requires Form W-7 and identity documentation. Processing timelines differ. Plan for both applications early in the process, before banking or tax filing deadlines approach.

If your ownership structure or filing situation is unclear, consult a qualified U.S. tax professional. The right combination of identification numbers depends on your entity structure, how the LLC is taxed, your country of residence, and whether any treaties affect your filing status.