Guide 27 · Tax IDs without an SSN

Form W-7 and the ITIN application: when an ITIN is required, and when it is not

The ITIN is the most over-sold number in the foreign-founder market. It is a personal tax-processing number with a short list of genuine uses — and forming an LLC is not one of them. This page lists the real triggers, the application mechanics for the cases that are real, and the claims to walk away from.

On this page

1. What an ITIN is, in the IRS's own framing
2. The five situations where a founder genuinely needs one
3. The situations where you are told you need one, and do not
4. How the application actually works
5. Expiry and renewal: the quiet deadline
6. Where this sits in the Sethhost bundle
7. Reading is step one. The paperwork is the rest.

What an ITIN is, in the IRS's own framing

An Individual Taxpayer Identification Number is a nine-digit number, always beginning with 9, that the IRS issues to people who must file or be reported on a US tax return but who are not eligible for a Social Security number. The IRS states its limits plainly: an ITIN does not authorize work in the United States, does not change immigration status, and does not entitle the holder to Social Security benefits. It is a tax-administration tool and nothing else.

Our ITIN vs EIN vs SSN guide draws the three-number map. The short version: the EIN belongs to your company and needs no personal number behind it; the SSN belongs to people the Social Security Administration issues it to, and a founder abroad cannot apply for one; the ITIN belongs to you personally, only for tax reasons the IRS recognises.

The five situations where a founder genuinely needs one

• You must file a personal US return — for example a Form 1040-NR for effectively connected income (see our 1040-NR and ECI guide) — and you have no SSN.
• A US payer must report income to you personally and needs a TIN for the information return — certain partnership allocations, royalties and similar items reported in your own name.
• You are claiming a treaty benefit personally, where the claim is made in your own name rather than through a form a payer holds.
• A state, bank or licensing process requires a TIN and will accept an ITIN in the specific case — genuine, but narrower than sales copy suggests; ask the institution to name the rule.
• You are a dependent or spouse listed on a return where the IRS requires an ITIN for the filing to process.

Notice what the list has in common: a return, a report or a claim that carries your name. If the obligation belongs to the company, the number it needs is the EIN.

The situations where you are told you need one, and do not

• To form an LLC or a corporation. State formation does not ask for the owner's ITIN. Not required.
• To get the company's EIN. The SS-4 route for foreign owners works precisely because no SSN or ITIN is required of the responsible party in the way sellers imply; our EIN without an SSN guide walks the actual workflow.
• To open Stripe. Stripe verifies the business and its owners; an ITIN is not a Stripe product requirement for a foreign-owned US LLC. A provider may ask for a TIN for the business — that is the EIN.
• Because a package includes it. An included ITIN application is not evidence you need one. An unnecessary W-7 with no valid reason category can be rejected by the IRS, and a rejected application costs you the weeks the calendar did not have.

How the application actually works

A genuine application is made on Form W-7, filed either with the tax return that creates the need, or under one of the IRS's exception categories that allow a stand-alone filing. You prove identity and foreign status with original documents or certified copies from the issuing agency — a passport is the one document that proves both on its own. Applications go by mail to the IRS's Austin processing centre, through an IRS Taxpayer Assistance Center that offers document review, or through a Certified Acceptance Agent (CAA), who verifies documents so originals do not travel.

Two practical warnings. First, if you mail originals and the application stalls, your passport is inside the stall — the CAA route exists for a reason. Second, the W-7 asks for the reason category; an application whose stated reason does not match an IRS category is the single most common cause of rejection. Processing is measured in weeks, and longer in filing season.

Expiry and renewal: the quiet deadline

ITINs expire. Under the PATH Act rules, an ITIN that has not been used on a federal return for three consecutive years expires, and ITINs issued before 2013 expired on a rolling schedule by middle digits. An expired ITIN does not block your company's EIN or its 5472 — but a personal return filed with an expired ITIN can be processed with the credits and positions stripped out until the number is renewed. Renewal uses the same Form W-7, ticked as a renewal, and can be filed ahead of the return it will be needed for. Our ITIN renewal guide covers the timing in full.

Where this sits in the Sethhost bundle

Sethhost does not sell ITIN applications, and the membership does not include one — deliberately. The EIN workflow inside the bundle needs no ITIN, and inventing a need helps no one. Where a client's facts genuinely require an ITIN — a personal return is due, a payer is reporting in their name — the portal records the determination and points to the CAA/CPA route, and the EIN service page keeps the company number's separate lane clear. If a competitor's bundle leads with an ITIN, ask them which return of yours requires it. The answer tells you whether you are buying a filing or a decoration.