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EIN vs ITIN for Non-Resident Amazon FBA Sellers: Which One Do You Actually Need First?

You've registered your LLC, you're staring at Amazon Seller Central's tax interview screen, and it's asking for a number you don't have — or maybe two. Figuring out EIN vs ITIN for non-resident Amazon FBA sellers trips up nearly everyone who builds a U.S. e-commerce business from outside the country, because the two numbers sound similar but serve completely different purposes. This guide breaks down what each one actually does, which one you need to start selling, and when the second one becomes unavoidable.

EIN and ITIN: What Each Number Actually Does

An EIN (Employer Identification Number) identifies a business to the IRS. It's a nine-digit number, formatted like 12-3456789, and it's what your LLC uses to open a bank account, file business tax returns, and appear on Amazon's 1099-K reporting. Think of it as your company's tax ID — it has nothing to do with your personal immigration status or whether you've ever set foot in the United States.

An ITIN (Individual Taxpayer Identification Number) identifies a person to the IRS for tax purposes when that person isn't eligible for a Social Security Number. It's formatted like 9XX-XX-XXXX and is used on personal tax returns — most commonly Form 1040-NR for non-resident aliens reporting U.S.-sourced income.

Both numbers are issued exclusively by the IRS. Nolly prepares and organizes the documentation non-residents need to apply for either one — we're an independent service, not a government office, and no third party can guarantee IRS approval or timing.

Why Amazon FBA Sellers Confuse These Two Numbers

The confusion usually comes from timing, not logic. Most non-resident sellers form a single-member LLC, and single-member LLCs are treated as "disregarded entities" for U.S. tax purposes by default. That means the LLC's income isn't taxed separately — it flows through to the owner, who reports it personally.

This creates a strange overlap: the business needs an EIN to function administratively (banking, Amazon registration), but the person behind it may eventually need an ITIN to file the personal return that actually reports the income. Sellers see both terms in the same Amazon setup guides, in the same LLC formation packages, and in the same forum threads — and assume they're interchangeable or that one automatically triggers the other. It doesn't. You apply for each separately, for different reasons, often months apart.

What You Need to Open Your Amazon Seller Account and Business Bank

For the practical, day-one logistics of running an FBA business, here's what's actually required:

Notice that everything in the first three rows — the parts that let you actually operate — depends on the EIN. The ITIN doesn't enter the picture until tax filing season, or a specific event triggers it sooner.

When You Need an EIN First (And Why It's Usually the Starting Point)

For nearly every non-resident forming a U.S. LLC to sell on Amazon, the EIN comes first — sometimes by necessity, sometimes just by practical order of operations.

Here's the sequence that plays out for most sellers:

1. Form the LLC in a state like Wyoming, Delaware, or New Mexico (often through a formation service).
2. Apply for the EIN using Form SS-4. Non-residents without a Social Security Number or ITIN can still get an EIN — the application just gets filed differently (typically by phone, fax, or mail rather than the online instant-issue system, since that system requires an SSN or ITIN as a responsible party).
3. Use the EIN to open a business bank account and complete Amazon's tax interview.
4. Start selling.

None of this requires an ITIN. In fact, applying for an EIN is usually faster — processing by fax or mail typically runs a few weeks, compared to the ITIN process which is tied to tax return submission timing in most cases. Because Amazon and U.S. banks won't move forward without an EIN, it becomes the non-negotiable first step for anyone setting up shop.

We cover this sequencing in more detail in ITIN or EIN First? What Foreign-Owned Single-Member LLC Owners Must File Before Opening a U.S. Bank Account, which walks through the exact order for LLC owners specifically.

When an ITIN Becomes Necessary (Tax Filing, FIRPTA, and Personal Tax Situations)

The ITIN enters the picture the moment you, personally, have a U.S. tax filing obligation. For Amazon FBA sellers, that's typically one of these triggers:

• Annual tax filing. If your disregarded-entity LLC generated U.S.-sourced income, you as the owner generally need to file Form 1040-NR to report it — and you can't file that return without an ITIN (or SSN). The IRS allows you to submit the ITIN application (Form W-7) attached to the return itself, so this is often the point where sellers apply for the first time.
• Claiming a tax treaty benefit. If your home country has a tax treaty with the U.S. that reduces withholding on certain income types, you typically need an ITIN to claim it on your return.
• FIRPTA situations. If you're a non-resident who also sold U.S. real property (separate from your FBA business — some sellers hold both), FIRPTA withholding rules require an ITIN to file for a refund of over-withheld amounts or to request a withholding certificate. We go deep on that process in How to Apply for a FIRPTA Withholding Certificate (Form 8288-B) and How Long Does a FIRPTA Refund Take?
• State-level or platform-specific requests. Occasionally a payment processor or state tax authority will ask for an ITIN independent of your federal filing — less common, but it happens with sellers who also run Etsy or Shopify storefronts alongside Amazon.

The key point: the ITIN isn't optional once a filing obligation exists, but it also isn't needed before that obligation arises. Sellers who rush to apply for one before they have income to report, or a return to attach it to, often get flagged for missing documentation — the IRS generally wants a valid reason (like an attached tax return) accompanying the W-7.

Can You Get Both? Sequencing EIN and ITIN Applications Correctly

Yes — most non-resident LLC owners eventually need both numbers, just not at the same time. The practical sequence looks like this:

1. Form the LLC.
2. Get the EIN (weeks, not months, in most cases).
3. Operate the business for the tax year — sell inventory, collect revenue, track expenses.
4. At tax filing time, prepare Form 1040-NR (and the LLC's Form 5472/1120 informational filing, which uses the EIN, not the ITIN).
5. Attach Form W-7 to the 1040-NR if you don't already have an ITIN, applying for both simultaneously through the mail-in package.

Trying to reverse this order — applying for an ITIN speculatively before you have a business bank account or completed tax year — rarely helps and can add friction, since W-7 applications generally need to be tied to an actual tax filing purpose. If you're also running other U.S.-income channels (an Etsy shop, freelance consulting, YouTube ad revenue), the same ITIN covers all of it once issued — you're not applying per platform. Our related guide on ITIN for Amazon Sellers Outside the United States covers scenarios where sellers juggle multiple income streams under one ITIN.

Common Mistakes That Delay Amazon Sellers' Applications

A few patterns show up repeatedly among non-resident sellers, and each one costs weeks:

• Applying for an EIN using a formation agent's default template that lists the wrong "responsible party," causing IRS correspondence to go to the wrong address or contact.
• Assuming the online EIN application works for non-residents. It generally doesn't — the IRS online system requires the responsible party to have an SSN or ITIN, so most non-residents must apply by phone, fax, or mail instead, which takes longer and requires more precise paperwork.
• Submitting a W-7 with no attached tax return and no other qualifying exception, resulting in rejection or a request for more documentation.
• Sending original passports by mail unnecessarily when a Certifying Acceptance Agent could authenticate a copy instead — adding mailing risk and processing delays.
• Mixing up EIN and ITIN on Amazon's tax interview form, entering a personal ITIN where the business EIN belongs (or vice versa), which can trigger a mismatch with IRS records and hold up 1099-K reporting.
• Waiting until the tax deadline to start the ITIN process, when the W-7 and return package genuinely need lead time to assemble and mail.

Each of these mistakes is avoidable with the right documentation prepared up front — which is exactly the gap this kind of preparation service exists to close.

Documentation Checklist: What Non-Residents Should Prepare for Each

For the EIN (Form SS-4):

• LLC formation documents (Articles of Organization / Certificate of Formation)
• Business name, address (can be a registered agent address), and formation state
• Responsible party's full legal name, foreign address, and passport details
• A clear statement of business activity (e.g., "online retail sales via e-commerce platform")

For the ITIN (Form W-7):

• A valid, unexpired passport (the single stand-alone document the IRS accepts on its own)
• Completed Form W-7 with the correct exception code if not filing a return concurrently
• The attached federal tax return (Form 1040-NR) in most standard cases
• Proof of foreign status if passport isn't used (national ID plus supporting documents)
• Any treaty-benefit documentation if claiming reduced withholding

Getting these documents right the first time is the single biggest lever non-resident sellers have over their own timeline. For a full walkthrough of the W-7 form itself, see Form W-7 Line By Line, and if you want to avoid the most frequent rejection triggers, Why ITIN Applications Get Rejected is worth reading before you file.

Getting the sequence right — EIN to launch the business, ITIN to file the personal return — saves months of back-and-forth with the IRS and keeps your Amazon account, bank account, and tax filings all pointing to the correct numbers from day one.

Frequently Asked Questions