ITIN vs SSN for LLC: What Non-Residents Need to Know

What is the difference between an ITIN and an SSN?

An SSN is a 9-digit number issued by the Social Security Administration (SSA) to US citizens and authorized workers, while an ITIN is a 9-digit number issued by the IRS to individuals who need a US tax ID but cannot get an SSN. Both numbers serve as personal tax identification numbers, but they differ in eligibility requirements, issuing agency, format, and permitted uses.

A Social Security Number (SSN) follows the format XXX-XX-XXXX and is issued by the Social Security Administration. The SSN serves dual purposes: it tracks earnings for Social Security benefits and functions as a tax identification number. US citizens receive SSNs automatically. Foreign nationals receive SSNs when they obtain work authorization through a visa or green card. The SSN is required for employment, credit history, and most financial services in the United States.

An Individual Taxpayer Identification Number (ITIN) follows the format 9XX-XX-XXXX and always begins with the digit 9. The IRS issues ITINs exclusively for federal tax processing. An ITIN does not authorize employment in the United States, does not provide eligibility for Social Security benefits, and does not change immigration status. The ITIN exists solely to ensure that individuals who earn US income or have US tax obligations can comply with tax laws regardless of immigration status.

For non-resident Wyoming LLC owners, the practical difference is significant. An SSN opens doors to traditional US banking, credit cards, and the IRS online EIN application. An ITIN provides a subset of those benefits, primarily enabling tax filing and the online EIN application. Neither is required for LLC formation itself.

Who qualifies for an SSN and who qualifies for an ITIN?

US citizens and foreign nationals with work authorization from the Department of Homeland Security qualify for SSNs. Foreign nationals without work authorization who have a US tax filing obligation qualify for ITINs. Most non-resident Wyoming LLC owners fall into the ITIN-eligible category.

SSN Eligibility

The Social Security Administration issues SSNs to three groups. First, US citizens receive SSNs at birth or upon naturalization. Second, permanent residents (green card holders) receive SSNs with their immigration documentation. Third, foreign nationals with valid employment authorization documents (EADs) from USCIS receive SSNs when they apply through the SSA.

Common visa categories that allow SSN applications include H-1B (specialty occupation), L-1 (intracompany transfer), O-1 (extraordinary ability), E-2 (treaty investor), and TN (NAFTA professional for Canadian and Mexican citizens). F-1 students with OPT or CPT employment authorization also qualify for SSNs. Tourist visa holders (B-1/B-2), ESTA visitors, and individuals without US immigration status do not qualify for SSNs.

ITIN Eligibility

The IRS issues ITINs to individuals who have a federal tax filing requirement or are claiming a tax treaty benefit but do not qualify for an SSN. This includes non-resident aliens who earn US-source income, foreign nationals who own US LLCs with tax filing obligations, spouses of US citizens claimed on joint tax returns, and dependents of US taxpayers who cannot obtain SSNs.

To apply for an ITIN, you must have a valid federal tax purpose. The most common qualifying purposes for non-resident LLC owners are filing Form 1040-NR (US Non-Resident Alien Income Tax Return) for US-source income, claiming tax treaty benefits to reduce withholding on US income, or being listed as a responsible party who needs to interact with the IRS online system.

You cannot apply for an ITIN simply because you want one. The IRS requires a qualifying reason, which typically means you need to file a federal tax return or information return. Owning a foreign-owned single-member LLC that files Form 5472 for Wyoming LLC non-residents with a pro-forma Form 1120 creates a valid filing purpose.

Who Does Not Need Either?

Non-resident LLC owners who form a Wyoming LLC, obtain an EIN via fax, and use fintech banks like Mercury or Relay may never need an SSN or ITIN. The EIN serves as the LLC's tax ID. Form 5472 filing uses the LLC's EIN. Mercury and Relay accept foreign passports for identity verification. This path works for most non-resident LLC owners operating entirely outside the US.

Do I need an ITIN or SSN to form a Wyoming LLC?

No. Wyoming LLC formation does not require an ITIN or SSN. The Wyoming Secretary of State requires only a unique LLC name, a registered agent with a Wyoming street address, and Articles of Organization with the $100 filing fee. No personal tax identification number appears on any formation document.

Wyoming Statute §17-29-201 governs LLC formation. The statute requires the LLC name, registered agent name and Wyoming address, principal office address, and organizer signature. The statute does not reference Social Security Numbers, ITINs, or any personal tax identification. This means citizens of any country can form a Wyoming LLC without any US tax ID.

The formation process is identical for US citizens with SSNs and foreign nationals without any US tax number. You file Articles of Organization online at the Wyoming Secretary of State website, pay $100, and receive approved Articles in 1-3 business days. The registered agent provides the Wyoming street address required for filing.

After formation, you need an EIN (Employer Identification Number) for your LLC. The EIN is a business tax ID, separate from personal tax IDs like SSNs and ITINs. Learn more about EIN for non-residents without SSN and how to apply without any personal US tax number.

Do I need an ITIN or SSN to get an EIN?

No. Non-residents obtain an EIN without an SSN or ITIN by submitting IRS Form SS-4 by fax or mail. However, having an SSN or ITIN unlocks the IRS online EIN application, which provides an EIN immediately instead of waiting 4-8 weeks for fax processing.

EIN Application Without SSN or ITIN

Non-residents without any US personal tax ID complete IRS Form SS-4 and write "Foreign" in the SSN/ITIN field (Line 7b). Fax the completed form to (855) 641-6935. The IRS processes international fax applications in 4-8 weeks and mails the EIN confirmation letter (CP 575) to the address on the form. This is the most common method for non-resident LLC owners. Read the full walkthrough at how to get EIN as a foreign national.

EIN Application With SSN or ITIN

If you have an SSN or ITIN, you can use the IRS online EIN application at irs.gov. The online system issues an EIN immediately upon completion. This is the fastest method and eliminates the 4-8 week wait. The system requires a valid SSN or ITIN for the responsible party. If you plan to file personal US tax returns or want instant EIN access, obtaining an ITIN first may be worthwhile.

Which Method to Choose

Most non-residents use the fax method because it requires no prior US tax ID. The 4-8 week wait is acceptable for most formation timelines. Non-residents who want an EIN faster, or who plan to form multiple LLCs over time, benefit from obtaining an ITIN first. With an ITIN, every future EIN application completes instantly online. Learn the full process at applying for EIN online as a non-resident.

Which do I need for US business banking?

Fintech banks like Mercury, Relay, and Wise Business accept Wyoming LLC owners with only an EIN and foreign passport. Traditional banks like Chase, Bank of America, and Wells Fargo typically require an SSN or ITIN for the business owner in addition to the LLC's EIN.

Banking Without SSN or ITIN

Mercury Bank and Relay Bank are the primary options for non-resident LLC owners who do not have an SSN or ITIN. Both banks verify identity using your foreign passport and verify the business using your Articles of Organization, EIN confirmation letter (CP 575), and operating agreement. The application process is 100% online with no US visit required. Read the complete guide on Mercury Bank for Wyoming LLC.

Wise Business also accepts non-resident LLC owners with only an EIN and passport. Wise provides a multi-currency account with USD bank details (account and routing numbers) suitable for receiving Stripe payouts and ACH transfers. Wise is not a full bank replacement but excels at international transfers and currency conversion. Learn more about US bank account for Wyoming LLC non-residents.

Banking With ITIN

An ITIN expands your banking options to include some traditional banks. Certain Bank of America branches accept ITIN holders for business accounts when presented in person. Some credit unions and community banks also accept ITINs. Having an ITIN signals to banks that you are engaged with the US tax system, which can improve approval odds at banks that review tax compliance.

Banking With SSN

An SSN opens access to all US banks, credit cards, and financial services. Chase Business Complete Banking, Bank of America Business Advantage, and Wells Fargo Business Checking all accept SSN holders. An SSN also enables personal credit building in the US, which can lead to business credit cards and lines of credit. For non-residents who plan extensive US business operations, an SSN (obtained through work authorization) provides the broadest financial access.

Which do I need for US tax filing?

Foreign-owned single-member LLCs file Form 5472 with a pro-forma Form 1120 using the LLC's EIN. No personal SSN or ITIN is required for this filing. However, if the LLC generates US-source income that triggers personal tax obligations, the owner needs an SSN or ITIN to file Form 1040-NR.

Form 5472 Filing (Most Common for Non-Residents)

Every foreign-owned single-member LLC must file Form 5472 (Information Return of a 25% Foreign-Owned US Corporation) along with a pro-forma Form 1120 by April 15 each year. This form reports transactions between the LLC and its foreign owner, including capital contributions, distributions, loans, and payments for services. The form uses the LLC's EIN, not a personal tax ID. Learn more at Form 5472 for Wyoming LLC non-residents.

Form 1040-NR Filing (If US-Source Income Exists)

If your Wyoming LLC earns income effectively connected with a US trade or business (ECI), you may need to file Form 1040-NR (US Nonresident Alien Income Tax Return). This personal tax return requires an SSN or ITIN. Common scenarios that trigger this include providing services while physically present in the US, renting US real estate, or having a permanent establishment in the US under a tax treaty.

Most non-resident LLC owners who operate entirely outside the US, serve international clients, and have no physical US presence do not have ECI and do not need to file Form 1040-NR. Their only US filing obligation is Form 5472, which uses the LLC's EIN.

Claiming Tax Treaty Benefits

If your country has a tax treaty with the US, you may qualify for reduced withholding rates on certain types of US-source income. Claiming treaty benefits on Form W-8BEN requires an SSN or ITIN. If you receive US-source income subject to withholding (such as royalties or interest), having an ITIN allows you to claim the reduced treaty rate instead of the default 30% withholding rate.

State Tax Filing

Wyoming has no state income tax, so Wyoming LLC owners have no state tax filing obligations. If your LLC is registered in a state with income tax (California, New York, etc.), that state may require personal tax IDs for state filings. This is one reason Wyoming is preferred by non-residents.

How do ITIN and SSN compare for LLC tasks?

The following table shows which LLC-related tasks require an SSN, which accept an ITIN, and which need neither. Non-resident LLC owners can complete most essential tasks without any personal US tax ID.

The table shows that non-residents can form an LLC, get an EIN, open a bank account, set up Stripe, and file Form 5472 without any personal US tax ID. The ITIN adds the ability to use the online EIN application, file personal tax returns, and claim treaty benefits. The SSN adds employment authorization and full access to traditional banking and credit.

How do non-residents apply for an ITIN?

Non-residents apply for an ITIN by submitting IRS Form W-7 with a qualifying federal tax return and identity documentation. The application takes 7-11 weeks by mail or can be processed faster through a Certified Acceptance Agent (CAA). The ITIN is free.

Step 1: Establish a Qualifying Tax Purpose

The IRS requires a reason to issue an ITIN. For Wyoming LLC owners, the most common qualifying purposes are filing Form 1040-NR for US-source income or claiming treaty benefits. Owning a foreign-owned LLC that files Form 5472 can serve as a basis when combined with other filing requirements. Attach the relevant tax return to Form W-7.

Step 2: Complete IRS Form W-7

Form W-7 (Application for IRS Individual Taxpayer Identification Number) collects your name, foreign address, birth information, and the reason you need an ITIN. Key fields include:

• Line 1a-d: Your full legal name as shown on your passport.
• Line 2: Your foreign mailing address where the IRS will send your ITIN letter.
• Line 3: Your foreign street address if different from mailing address.
• Line 4: Your date of birth and country of birth.
• Line 5: Your country of citizenship.
• Line 6a: Check the reason you are submitting Form W-7 (typically box "a" for nonresident alien filing a US tax return, or box "h" for other with explanation).

Step 3: Gather Identity Documents

The IRS requires original documents or certified copies from the issuing agency. A valid unexpired passport is the only standalone document that proves both identity and foreign status. If submitting by mail, you must send your original passport (returned in 60-90 days) or a certified copy from the issuing country's embassy or consulate. Using a Certified Acceptance Agent avoids mailing your original passport.

Step 4: Submit the Application

There are three submission methods:

1. Mail: Send Form W-7, the qualifying tax return, and original identity documents to: Internal Revenue Service, ITIN Operation, P.O. Box 149342, Austin, TX 78714-9342. Processing takes 7-11 weeks.
2. Certified Acceptance Agent (CAA): A CAA verifies your identity documents in person and submits Form W-7 on your behalf. You keep your original passport. CAAs charge $50-$300 for their service. Processing takes 7-11 weeks after submission.
3. In person: Visit an IRS Taxpayer Assistance Center (TAC) with Form W-7, tax return, and original documents. This requires a US visit but offers the fastest processing.

ITIN Renewal

ITINs expire if not used on a federal tax return for three consecutive years. ITINs with middle digits 70-88 have already expired under the IRS rolling expiration schedule. To renew, submit Form W-7 with "Renew" checked and the required identity documentation. No tax return is required for renewal-only applications. Renew before filing season to avoid processing delays.

How do foreign nationals obtain an SSN?

Foreign nationals obtain an SSN by first securing work authorization through a US visa or green card, then applying at a Social Security Administration (SSA) office. Without work authorization, foreign nationals cannot obtain an SSN regardless of LLC ownership.

Eligibility Through Immigration Status

The SSA issues SSNs to foreign nationals who have Department of Homeland Security (DHS) work authorization. This includes green card holders, H-1B visa holders, L-1 visa holders, O-1 visa holders, E-2 treaty investor visa holders, TN visa holders (Canada/Mexico), and F-1 students with OPT/CPT authorization. Tourist visa holders, ESTA visitors, and individuals without legal US status cannot obtain SSNs.

Application Process

To apply for an SSN, visit a local Social Security Administration office with your immigration documents (passport, visa, I-94 arrival record, employment authorization card if applicable) and complete Form SS-5 (Application for a Social Security Card). The SSA verifies your immigration status with DHS, which takes 2-6 weeks. Your Social Security card arrives by mail.

LLC Ownership Does Not Create SSN Eligibility

Owning a Wyoming LLC does not entitle you to an SSN. The SSN is tied to immigration status and employment authorization, not business ownership. A non-resident who forms a Wyoming LLC and manages it from outside the US has no basis for an SSN application. This is why the ITIN exists as an alternative tax identification number for individuals in this situation.

E-2 Treaty Investor Visa Pathway

Some non-resident entrepreneurs explore the E-2 treaty investor visa as a pathway to both US residency and an SSN. The E-2 visa requires a substantial investment in a US business, an approved treaty country, and active management of the business. If approved, E-2 visa holders receive work authorization and can apply for an SSN. However, the E-2 visa is not available to citizens of all countries and requires significant investment beyond LLC formation costs.

What advantages does an ITIN provide for LLC owners?

An ITIN provides four advantages for non-resident LLC owners: instant online EIN applications, personal US tax filing capability, tax treaty benefit claims, and expanded banking options. Whether these advantages justify the 7-11 week application process depends on your business situation.

Advantage 1: Instant Online EIN Applications

With an ITIN, you can use the IRS online EIN application and receive an EIN within minutes. This is valuable if you plan to form multiple LLCs or need an EIN urgently. Without an ITIN, each EIN application requires fax submission and 4-8 weeks of processing. If you anticipate forming more than one LLC, the ITIN pays for itself in time savings.

Advantage 2: Personal Tax Filing

If your LLC generates US-source income (effectively connected income), you need to file Form 1040-NR, which requires an SSN or ITIN. Having an ITIN ensures you can file personal US tax returns if the need arises. This is especially relevant for LLC owners who provide services to US clients while physically in the US, even temporarily.

Advantage 3: Tax Treaty Benefits

Many US tax treaties reduce withholding rates on US-source income like royalties, interest, and certain service fees. Claiming these reduced rates on Form W-8BEN requires an ITIN. Without an ITIN, you face the default 30% withholding rate on applicable income. For LLC owners receiving US-source passive income, the ITIN can save significant tax dollars.

Advantage 4: Expanded Banking

An ITIN provides access to certain traditional US banks and credit unions that do not accept foreign passport-only applications. Some Bank of America branches, TD Bank locations, and credit unions accept ITIN holders for business accounts. This expands your banking options beyond Mercury, Relay, and Wise.

When to Skip the ITIN

If you only need one EIN (the 4-8 week fax wait is acceptable), your LLC has no US-source income requiring personal tax filing, you do not receive US-source passive income subject to withholding, and Mercury or Relay meets your banking needs, then an ITIN provides minimal benefit. Most single-LLC non-resident owners operate successfully without an ITIN indefinitely.

Frequently Asked Questions

Can an ITIN be converted to an SSN?

If you later become eligible for an SSN through employment authorization, apply for the SSN and notify the IRS to combine your tax records. The IRS merges your ITIN filing history with your new SSN. You cannot use both numbers simultaneously.

Does an ITIN give work authorization?

No. An ITIN is exclusively for tax processing purposes. It does not authorize employment in the United States, provide eligibility for Social Security benefits, or change immigration status. Only work visas and green cards provide employment authorization.

How much does an ITIN cost?

The ITIN itself is free from the IRS. If you use a Certified Acceptance Agent to avoid mailing your original passport, the agent charges $50-$300. Tax preparation fees for the required tax return vary from $200-$500 depending on complexity.

Can I get an ITIN before forming an LLC?

The IRS requires a qualifying tax purpose to issue an ITIN. If you have no existing US tax filing obligation, you generally cannot get an ITIN before forming an LLC. Form the LLC first, then use the resulting tax filing obligation (Form 5472) as the basis for your ITIN application.

Do both members of a multi-member LLC need ITINs?

Multi-member LLCs file Form 1065 (partnership return), which requires the LLC's EIN. Each member receives a Schedule K-1 showing their share of income. If members need to file personal US tax returns for this income, each member needs an SSN or ITIN. Learn more about EIN for multi-member LLCs.