Form SS-4 Walkthrough for Non-Residents

Form SS-4 is the IRS application you file to get an Employer Identification Number (EIN) for your US company, and a non-resident founder with no Social Security Number files the same form as everyone else — with two differences. On line 7b you enter "Foreign" (or "N/A") instead of an SSN, and you submit by fax or mail instead of the online tool, because the IRS online EIN application requires the responsible party to have a US taxpayer ID. Everything else is a straightforward, one-page form you can complete in about fifteen minutes.

What is Form SS-4 and why do non-residents need it?

Form SS-4 is the IRS application for an Employer Identification Number, the nine-digit federal tax ID that identifies your business to the IRS and to banks.

If you have formed a Wyoming LLC or a Delaware C-Corp from outside the US, the EIN is the hinge between "I have a registered entity" and "I can actually operate." You cannot open a US business bank account, file a federal return, or onboard most payment processors without it. The form, current instructions, and submission details live on the IRS About Form SS-4 page.

An EIN is required to open a US business bank account — applications without one are rejected, full stop.

That single fact is why founders abroad treat the SS-4 as the real starting line of a US business, not the state formation filing. Get the form right and the rest of the stack — bank, payments, compliance — unlocks in sequence.

How do you fill out Form SS-4 line by line?

Most of the form is administrative; only a handful of lines trip up non-residents.

Work top to bottom and treat the entity — not yourself — as the applicant. Here is what each meaningful line wants, with the non-resident nuance called out where it matters.

Two more lines are easy to skip but worth a glance.

The Third Party Designee block at the bottom lets you authorize someone — an accountant or your formation provider — to receive the EIN and answer IRS questions about the application; you only complete it if you want that. And the signature line must be signed by the responsible party or an authorized person, with a daytime phone number the IRS can actually reach during US hours if they have a question.

What do you put on line 7b with no SSN?

If you are the responsible party and you have no SSN or ITIN — and are ineligible to obtain one — the IRS instruction is to enter "Foreign" or "N/A" on line 7b.

This is the line that generates the most anxiety and the most bad advice. Foreign individuals are not required to have an ITIN to receive an EIN; the responsible party on line 7a just has to be a real person who controls the entity, and 7b is where you signal that this person has no US taxpayer ID. The current Instructions for Form SS-4 state that an entry is required and that "Foreign" or "N/A" is the correct one.

In practice, there is a wrinkle worth knowing.

Some filers leave 7b blank and the EIN still issues, because the IRS clerk processing a foreign application reads the rest of the form and assigns the number anyway. We tell founders to follow the written instruction — put "Foreign" — because it matches the IRS guidance exactly and removes a reason for the application to be kicked back. The blank-line outcome is real, but it is the fallback, not the plan.

If you do have an SSN or ITIN, or are eligible for one, you must use it on line 7b — the 'Foreign' entry is only for responsible parties who genuinely cannot obtain a US taxpayer ID.

How do non-residents actually submit Form SS-4?

Fax is the fastest route for a non-resident, because the online EIN tool is closed to applicants whose responsible party has no SSN or ITIN.

Once the form is complete and signed, you have three channels, and the choice mostly determines how long you wait. Fax is the practical winner; mail is the slow fallback; the phone line is for international applicants who want to apply by voice.

A practical tip: include a return fax number on the cover so the IRS can fax the EIN back to you within the four-day window.

If you have no fax, online services convert your form into a fax transmission, and the phone line at 267-941-1099 lets an IRS agent walk through the same questions and often assign the number on the spot. Keep the signed SS-4 in front of you for the call — they read straight from it.

This is general information, not legal or tax advice, and IRS contact details and instructions change. As of June 2026, confirm the current numbers and wording on irs.gov before you file.

The SS-4 detail most guides miss: 7a names who carries your compliance trail

Line 7a is not a formality — naming the responsible party sets who the IRS, your bank, and every downstream payment rail treat as the human behind the entity.

For a foreign-owned single-member LLC, that same person and entity then carry an annual Form 5472 plus pro forma 1120 obligation, due every year even with zero activity — and the Form 5472 penalty is a flat $25,000 per form. The EIN you get from this one-page application is the thread that ties your formation, your bank account, your tax filings, and your payment records together. Get 7a and 7b clean now and the paper trail behind every later filing stays clean.

That paper trail is exactly where the DIY, direct-wallet path falls apart — and where StableCorp's compliant rails earn their keep.

StableCorp forms the entity, files your SS-4, and opens the US bank account, then runs USD and USDC/USDT settlement on Solana, Ethereum, or Polygon with a reconciled record behind every payout. For clients incorporated with StableCorp the off-ramp is 0.5% and the on-ramp is 1.5%, versus the market's roughly 2.9% headline plus about 2% hidden FX markup that lands near 5% effective — and Indian founders can off-ramp directly to INR at 1% on RBI purpose-code rails. See the full schedule on pricing.

What comes after the EIN?

The EIN unlocks the rest of the stack: bank account, payments, and your first tax filings.

With the EIN letter (CP 575) in hand, you can open a US business bank account, plug in payment processing, and — for a foreign-owned LLC or a C-Corp — calendar the annual returns that keep the entity in good standing. The documents you need to form a US company guide covers what to gather before you ever reach the SS-4 stage.

Do this in the right order and you never have to redo it.

StableCorp handles formation through EIN through bank account through compliant USD and stablecoin payments in one path, and can also onboard an existing entity onto the same rails. Start with pricing to see the all-in cost.

Sources