Short answer: Most banks open a business account only after the IRS issues your EIN. When you incorporate a Delaware C-corp with Rho, your business account can open in the same flow before the EIN arrives, subject to approval.
What waits on the EIN: Funds can move once the EIN is issued and attached to the account.
Who can skip the EIN: Sole proprietors and some single-member LLCs can bank on an SSN at certain banks; corporations, partnerships, and multi-member LLCs need an EIN.
Rho pricing: Delaware C-corp formation is $400. LLC formation is $349 all in, state filing fee included.
Can you open a business bank account before you get an EIN?
At most banks, no: the bank asks for the IRS-issued EIN before it opens a business account. The exception is when you incorporate a Delaware C-corp with Rho: your business account can open in the same flow before the EIN arrives, subject to approval, and funds can move once the EIN is issued and attached.
Best for founders forming a Delaware C-corp who want their company formed and a business account opened in the same flow, subject to approval: Rho. We assess formation options on price, what's included, and whether a business account can open in the same flow as formation.
Why most banks say no
Banks verify businesses under Customer Identification Program (CIP) and know-your-business (KYB) rules, and most institutions built that process around one document: the IRS letter with your EIN. It's not that the law strictly requires an EIN before an account can exist. It's that the EIN is the identifier the bank's onboarding, tax reporting, and compliance systems were designed around. No EIN, no application.
That design decision creates the classic day-zero gap: you've incorporated, you have a SAFE ready to sign, and you can't receive the money, because the IRS step is still in flight.
Who can open a business account without an EIN at all?
Whether you need an EIN before you can bank at all depends on how the business is structured, not on which bank you happen to ask first. The IRS treats a few structures as the same taxpayer as the owner, and those are the only ones that can sometimes skip the EIN.
A sole proprietor is the clearest case: the business and the owner file taxes as the same person, so a Social Security number or ITIN can stand in for an EIN at many banks.
A single-member LLC can sometimes open a business bank account without an EIN, but confirm before you assume. The IRS treats it as a disregarded entity by default, so some banks accept the owner's SSN.
Plenty of others require an EIN anyway, because the LLC is still a separate legal entity for banking purposes. The IRS itself notes that a single-member LLC that needs an EIN to open a bank account can apply for one. Policies vary by bank.
Multi-member LLCs, partnerships, and corporations, including a Delaware C-corp, don't get that flexibility. The IRS requires each of those structures to have its own EIN, so banks require the EIN as a matter of course, not preference.
Here's the breakdown by structure:
Entity type | EIN required by the IRS? | What banks usually ask for |
|---|---|---|
Sole proprietor | No, unless it has employees or owes certain excise taxes | SSN or ITIN |
Single-member LLC | No, if it's a disregarded entity with no employees and no excise tax liability | Sometimes an SSN, though many banks require an EIN anyway; policies vary by bank |
Multi-member LLC | Yes | EIN |
Partnership | Yes | EIN |
Corporation (including a Delaware C-corp) | Yes | EIN |
Documents to bring if you do not have an EIN yet
If you're opening as a sole proprietor, or a single-member LLC at a bank that accepts an SSN in place of an EIN, have these ready:
ID: A government-issued photo ID
Tax number: Your Social Security number or ITIN
Trade name filing: Your business registration or DBA/fictitious name filing, if you operate under a trade name
LLC documents: Formation documents and an operating agreement, if you're a single-member LLC
Address: A business address
Why you should get an EIN anyway
Multi-member LLCs, partnerships, and corporations need an EIN regardless, so for them this is moot. But even a sole proprietor or single-member LLC that could skip it usually shouldn't:
Privacy: It separates your personal identity from your business, so your SSN isn't the number attached to every business filing.
Hiring: You need one before you can hire anyone.
Credit and vendors: Many business credit cards, vendor accounts, and lenders ask for it, even when your bank didn't.
Cost: It's free directly from the IRS, no third party required.
Speed: Per the IRS, an online application issues the EIN immediately once approved, for applicants who meet the online eligibility rules.
If you want the mechanics, see how to get an EIN and how long it takes by method.
Which banks let you open an account before your EIN arrives?
It depends on the bank and on how the account is opened. Most banks require the EIN document first. The comparison below covers whether the account can open before the EIN lands, not how fast the EIN itself arrives (the next section covers that).
Provider | Opens before your EIN? | What the provider states |
|---|---|---|
Rho | Yes, in the Delaware C-corp incorporation flow, subject to approval | Your business account opens in the same flow as your incorporation, before the EIN arrives. Funds can move once the EIN is issued and attached. |
Mercury | No; its help center lists an IRS-issued EIN document among the application documents | Mercury's help center lists an IRS-issued EIN document (Form CP575, Form 147c, or the SS-4 as returned by the IRS) among the documents for a new application, and says a submitted SS-4 must be the returned version from the IRS, not just the application. |
Brex | No | Brex's support page states that all applicants are required to have a US EIN issued by the IRS. |
Where Rho fits
When you incorporate a Delaware C-corp with Rho, every formation document is reviewed by a licensed attorney, your registered agent is covered for the first year, your EIN application is filed for you, and you get 83(b) election support. Filing takes about 24 hours, starting the next business day after you submit. The Delaware C-corp is $400.
Your Rho business account opens in that same flow, before the EIN arrives, conditional on approval. Funds can move once the EIN is issued and attached to the account.
To be eligible for the Delaware C-corp flow, your company needs at least one US-based owner or officer, a physical US operating address, and a business in a non-excluded industry.
Rho also forms LLCs for $349 all in, state filing fee included.
Best for: founders forming a Delaware C-corp who want their company formed and a business account opened in the same flow, subject to approval.
How long the EIN step takes
Online: Per the IRS, an online application issues the EIN immediately once approved. It's available to applicants whose principal place of business is in the US or a US territory and whose responsible party has an SSN or ITIN.
Fax: The IRS faxes the EIN back in about 4 business days, if you include a return fax number on Form SS-4.
Mail: The IRS states you'll get your EIN in approximately 4 weeks.
Without an SSN or ITIN: The online application isn't available, so the EIN goes through fax, mail, or (for international applicants) phone, and the timeline is longer.
What changes when the account opens in the Delaware C-corp incorporation flow
Opening the account before the EIN doesn't skip verification: the account is still subject to approval. The EIN then attaches to the account when the IRS issues it, rather than gating the account's existence.
When you incorporate a Delaware C-corp with Rho, the sequence is one flow: attorney-reviewed formation documents filed on your behalf, your EIN application filed for you after the certificate, and your Rho business account application running alongside, subject to approval. Funds can move once the EIN is issued and attached.
The timeline, compared
Path | Incorporation to bank account | The EIN step |
|---|---|---|
Traditional bank | After your EIN letter arrives | Blocks the application from starting |
Rho (Delaware C-corp incorporation flow) | Account opens in the same flow as incorporation, subject to approval | Your EIN application is filed for you; funds can move once the EIN is issued and attached |
Why the account matters on day one
The reason to care about the gap isn't convenience. It's that money has somewhere to land as soon as it can move. Investor funds shouldn't commingle with personal accounts, so the business account should exist before the first SAFE check, and expenses that start at incorporation (state fees, software, contractors) belong on company rails.
FAQs
Often, yes. Banking on your SSN instead of an EIN can mean fewer account features, lower limits, and a harder split between your personal and business credit once you want a business card or a loan. Most banks will let you add an EIN to the account later, but it's simpler to get one before you need it.
At most banks, no: the bank asks for the IRS-issued EIN before it opens a business account. When you incorporate a Delaware C-corp with Rho, your business account can open in the same flow before the EIN arrives, subject to approval, and funds can move once the EIN is issued and attached.
It depends on how you apply. Per the IRS, an online application issues the EIN immediately once approved, a faxed Form SS-4 comes back in about 4 business days if you include a return fax number, and a mailed application takes approximately 4 weeks. Without an SSN or ITIN, the online option isn't available, so the timeline is longer.
Generally no. The IRS requires every corporation, including a Delaware C-corp, to have its own EIN, so banks usually require it. When you incorporate a Delaware C-corp with Rho, the business account can open in the same flow before the EIN arrives, subject to approval; funds can move once the EIN is issued and attached.
Usually not. Banks typically ask for a government-issued ID and your formation documents alongside the EIN, since the EIN identifies the business for tax purposes but doesn't verify who owns it. Requirements vary by bank.