EIN for a Delaware LLC: How to Get One the Right Way

What is an EIN and why does a Delaware LLC need one?

An EIN, or Employer Identification Number, is a nine-digit number the IRS assigns to identify a business entity — the business equivalent of a Social Security Number. It is sometimes called a Federal Tax ID or FEIN. Your Delaware LLC uses its EIN on bank applications, payment-processor onboarding, tax filings, and most official paperwork that asks for the company’s taxpayer identification number.

Why does it matter so much? Because almost everything you want to do with a Delaware LLC depends on it. You cannot open a US business bank account without an EIN. Stripe and PayPal require it during onboarding. The IRS uses it to track the entity’s federal obligations. For a foreign-owned single-member LLC, the EIN is also what ties the company to its required Form 5472 filing. In short, the Delaware LLC is the legal shell, and the EIN is the key that unlocks banking, payments, and compliance. The good news is that the IRS issues it for free — the only question is which application path applies to you.

Who needs an EIN, and can you ever skip it?

The IRS technically requires an EIN when your LLC has employees, operates as a multi-member LLC, files certain excise or employment taxes, or elects to be taxed as a corporation. A single-member LLC with no employees and no excise tax obligation can, on paper, use the owner’s SSN for federal income tax purposes because it is a “disregarded entity.”

In practice, though, almost no one skips the EIN. Banks, Stripe, PayPal, Amazon, and most US vendors insist on an EIN for any LLC, single-member or not. A non-resident owner has no SSN to fall back on anyway. And keeping the company’s tax identity separate from your personal SSN is cleaner for privacy and bookkeeping. So while the narrow legal exemption exists, the practical answer for nearly every Delaware LLC — especially one formed to accept US payments or for non-residents — is that you get an EIN. We treat it as a standard part of forming the LLC, not an optional extra.

What is Form SS-4 and what information does it need?

Form SS-4, “Application for Employer Identification Number,” is the single IRS form used to request an EIN. It is short, but every line has to match your Delaware records, because mismatches are the leading cause of delays. The core fields are:

• Legal name of the entity (line 1). This must match your Delaware LLC name exactly as it appears on the Certificate of Formation, down to “LLC” punctuation.
• Mailing address (lines 4a–4b). Where the IRS sends the confirmation. A non-US address is acceptable.
• Responsible party and their ID (lines 7a–7b). The name of the person who controls the LLC, plus their SSN, ITIN, or the word “Foreign” if they have neither.
• Entity type and reason (lines 8a, 9a, 10). You indicate it is an LLC, how many members it has, the state (Delaware), and why you are applying (usually “started a new business” or “banking purposes”).

Get those four blocks right and the rest of the form is routine. The channel you submit it through — online, fax, or mail — is what determines how fast you receive the number.

How do you get an EIN with an SSN or ITIN?

If the responsible party has a valid US SSN or ITIN, the fastest route is the IRS online EIN Assistant. You complete the Form SS-4 questions in a single browser session and, at the end, the system issues the EIN immediately and lets you download the CP 575 confirmation letter on the spot. There is no waiting and no fax.

A few practical notes. The online tool is only available during IRS operating hours and must be finished in one sitting — it times out after a period of inactivity. You can request only one EIN per responsible party per day. And the entity must already be formed in Delaware, because the name has to match. If you are a US founder with an SSN, this is usually a ten-minute task. The slower 2-to-4-week path only applies when the responsible party has neither an SSN nor an ITIN, which we cover next.

How does a non-resident get an EIN without an SSN or ITIN?

You do not need an SSN or ITIN to obtain an EIN. This is one of the most common misunderstandings among non-resident founders. The IRS explicitly allows a foreign responsible party to apply — you simply cannot use the online assistant, which requires a US taxpayer ID to authenticate.

Instead, you complete Form SS-4 on paper, write “Foreign” on line 7b where a US ID would normally go, and submit the form by fax or mail to the IRS unit that handles international applicants. The IRS reviews it and sends the EIN back by return fax or mail, typically within 2 to 4 weeks. Fax is generally quicker than mail. There is also an IRS international phone line that foreign applicants can use, though processing still depends on IRS workload. None of this requires you to travel to the US or hire anyone in the US. Our service handles this filing for non-resident founders as part of the package, so you do not have to navigate the IRS fax queue alone. For an ITIN, which is a separate personal tax ID some founders later need, see itin.so.

With SSN vs without: how the EIN process compares

The takeaway: the EIN itself is identical no matter which path you use — same nine-digit number, same permanence, same free price. The only real differences are the channel and the wait. If you have an SSN, you are done in minutes; if you do not, you budget a few weeks. That timeline matters when you are sequencing banking and Stripe, which both wait on the EIN.

Why is the responsible party so important?

Line 7 of Form SS-4 asks for the “responsible party” — the IRS’s term for the individual who ultimately owns or controls the entity and its funds. For a single-member Delaware LLC, this is almost always you, the owner. For a multi-member LLC, it is the member with the most control over the company’s money and decisions. The IRS generally requires a natural person here, not a holding company, so you cannot name another LLC as the responsible party in most situations.

This field matters for two reasons. First, accuracy: if the responsible party’s details do not line up with IRS records or are left blank, the application stalls. Second, accountability: the responsible party is the person the IRS will contact about the entity, and the EIN is effectively tied to them. If control of the LLC later changes hands, you are expected to update the responsible party with the IRS using Form 8822-B. Naming the responsible party correctly the first time avoids a surprisingly common source of rejected applications.

What is the step-by-step process to get your EIN?

Here is the clean sequence we use for a Delaware LLC, in order, so nothing gets done out of turn:

1. Form the LLC first. File the Delaware Certificate of Formation and confirm the approved entity name. The EIN application has to match this name exactly, so applying before the entity exists causes rejections.
2. Confirm your registered agent and address. A Delaware LLC needs a registered agent, and you need a mailing address for the SS-4. Both can be sorted at formation.
3. Complete Form SS-4. Enter the exact LLC name, the responsible party and their ID (or “Foreign”), the entity type, and the reason for applying.
4. Choose the channel. SSN or ITIN holders apply online for an immediate number; everyone else faxes or mails the form and waits about 2 to 4 weeks.
5. Store the confirmation. Save the CP 575 letter and the EIN somewhere safe — you will hand both to your bank and to Stripe.

That order — formation, then EIN, then banking — is deliberate. Each step unlocks the next. Skipping ahead, like applying for the EIN before the Delaware filing is approved, is one of the most common ways founders accidentally add weeks to their timeline.

How much does an EIN cost and how does it fit your LLC budget?

The EIN is free. The IRS does not charge for issuing an Employer Identification Number through any channel — online, fax, or mail. If a website advertises a price “for your EIN,” that fee is for the preparation and filing service, not for the number itself, which the IRS provides at no cost. It is worth knowing this so you are not overcharged for a standalone EIN.

Where the EIN sits in your overall budget is straightforward. Delaware charges $110 for the Certificate of Formation, and a registered agent runs about $99 per year. The EIN adds nothing to the government cost. With our $397 all-inclusive service, the EIN application is bundled in along with the $110 state fee, the first year of registered agent, and banking and Stripe support — so you are not paying a separate line item for it. You can see the full breakdown, including the Year 2 picture, on our Delaware LLC cost and pricing pages. Note that the EIN is a one-time, no-cost item; the recurring costs are the $300 franchise tax and the registered agent renewal, not the EIN.

How long does it take, and how does it affect banking and Stripe?

Timeline is the part founders care about most, because the EIN gates everything downstream. With an SSN or ITIN, you have the number in a single online session. Without one, plan for about 2 to 4 weeks via fax or mail. That window is why we start the EIN application as early as possible after the Delaware formation is approved.

The reason the timing matters is the chain reaction. A US bank or fintech — Mercury, Relay, Wise, Brex — will not open your account without the EIN and the IRS confirmation letter. Stripe and PayPal will not finish onboarding without it either. So the EIN is the bottleneck between “LLC exists” and “LLC can actually take money.” Once the EIN is in hand, bank approval often follows within one to five business days, and Stripe within a few days to a couple of weeks depending on your business model. Sequencing this well is a big part of how the overall process works: form the entity, secure the EIN, then move straight into banking and payments.

What are the most common EIN rejection reasons, and how do you avoid them?

Most EIN problems are not eligibility issues — they are formatting and consistency errors on Form SS-4. The recurring ones we see are:

• Name mismatch. The name on SS-4 does not match the Delaware Certificate of Formation exactly (a missing comma, “LLC” vs “L.L.C.”, or a typo). The IRS rejects on mismatch.
• Missing or invalid responsible party. Line 7 is blank, lists a company instead of a person, or has an ID that does not validate.
• Duplicate request. Applying again when the entity already has an EIN triggers the IRS “reference 101” error. Each entity gets one EIN.
• Incomplete address or entity details. Missing fields, an unclear country, or an entity type that does not match the formation.
• Illegible fax. For non-residents faxing the form, a poor scan can be rejected or delayed simply because the IRS cannot read it.

The fix for nearly all of these is the same: complete Form SS-4 carefully, mirror the exact Delaware name, name a real responsible party, and submit a clean copy. When we handle the filing, matching the SS-4 to the Certificate of Formation is a built-in check, which is why most of our EIN applications go through on the first pass.

Does the EIN expire, and what about Form 5472 for foreign owners?

An EIN is permanent. It never expires, there is no annual renewal, and it stays attached to your Delaware LLC for the life of the entity — even if the company sits dormant for years. If you lose the confirmation letter, the IRS can issue a 147C verification letter rather than a new number. The EIN is only retired when the LLC is formally dissolved, and even then the IRS keeps it on file.

One important compliance link for foreign owners: having an EIN does not by itself create a tax bill, but a foreign-owned single-member Delaware LLC is a “reportable” entity and must file Form 5472 along with a pro-forma Form 1120 each year — and the EIN is what the IRS uses to track that obligation. The penalty for missing Form 5472 is $25,000, so the EIN and that filing go hand in hand for non-residents. Whether your LLC owes any actual income tax is a separate question that depends on your activities; this is general information, not tax advice, so confirm your specific situation with a qualified advisor. For broader entity context, our Delaware C-Corp guide and series LLC guide explain how the EIN works across other structures.

What about BOI / FinCEN reporting — is the EIN tied to that?

It is worth separating these clearly, because founders often lump all federal “compliance” together. Beneficial Ownership Information (BOI) reporting is a filing with FinCEN, and it is distinct from your EIN, which is an IRS matter. The rules here have changed recently: under a March 2025 FinCEN interim final rule, BOI reporting was removed for US domestic reporting companies, leaving only certain “foreign reporting companies” with an obligation.

Because this area is still evolving, you should confirm the current requirement directly with FinCEN or a qualified advisor before assuming whether your Delaware LLC must file. What has not changed is the EIN itself: you still need it for banking, Stripe, and federal forms regardless of where BOI rules settle. Treat the EIN (IRS) and any BOI obligation (FinCEN) as two separate items on your compliance calendar so neither slips.

A worked example: a non-resident founder’s EIN timeline

Picture a founder in Lahore forming a single-member Delaware LLC to run a SaaS product and accept Stripe payments. She has no US SSN and no ITIN. Here is how her EIN actually plays out. First, her Delaware LLC is formed and the Certificate of Formation is approved with the exact entity name. Next, her Form SS-4 is prepared with her as the responsible party and “Foreign” on line 7b, then faxed to the IRS international unit.

Because she has no SSN, the online tool is off the table, so she waits in the 2-to-4-week window for the IRS to return the EIN by fax. Once the EIN and CP 575 arrive, the chain unlocks: she applies to Mercury with the EIN and confirmation letter and is typically approved within a few business days, then completes Stripe onboarding using the same EIN. From there, her ongoing obligations are the $300 franchise tax each June 1 and her annual Form 5472 — the EIN is the thread that ties all of it together. The entire EIN piece cost her nothing beyond the bundled service, because the IRS does not charge for it.

How does DelawareLLC.co handle the EIN for you?

When you form with us, the EIN application is part of the $397 all-inclusive service — not an upsell you discover later. We prepare Form SS-4 so it matches your Delaware Certificate of Formation exactly, name the correct responsible party, and choose the right channel for your situation: the immediate online route if you have an SSN or ITIN, or the fax/mail path with “Foreign” on line 7b if you do not. Because the SS-4 is matched to the formation documents, most applications clear on the first attempt and avoid the name-mismatch and responsible-party errors that delay DIY filers.

We also handle the timing so the EIN does not become a bottleneck — we file it as soon as the Delaware formation is approved, then move you straight into banking and Stripe once the number and confirmation letter are in hand. Our filing and EIN work carry a money-back guarantee, and support is over WhatsApp throughout. If you are ready, start with our Delaware LLC service or review the pricing; if you are weighing the EIN as a standalone need, our sister site ein.so focuses specifically on EIN applications, and itin.so covers the ITIN when you need a personal tax ID. This page is general information, not legal or tax advice.