How to Open a Mercury Account: Requirements, Documents, and Why Applications Get Declined

Opening a Mercury account takes about ten minutes of form-filling and, typically, a few business days of review — if you qualify and your business looks real. You need a US-registered LLC or corporation, an EIN, a real operating address, and government ID for every owner with 25% or more of the company. Sole proprietors can't apply. Non-US founders can, with a US entity, unless they live in a country on Mercury's prohibited list. This guide walks through the requirements, the documents, the application itself, and the specific things that get otherwise-eligible applications declined.

Disclosure: InvoiceBloom is a Mercury referral partner and earns a commission if you open and fund an account through our link. That doesn't affect what's written here.

Step 1: Confirm you're eligible (two minutes, saves a week)

You need all four of these. If one is missing, stop and fix it before applying — a declined application is not something you want on file.

1. A US business entity. An LLC, C-corp, S-corp, or partnership registered in any US state. Sole proprietorships are not eligible, even with a DBA. If you're still deciding whether to form one, start with sole proprietor vs LLC for freelancers.
2. An EIN. The IRS issues these free and instantly through its online EIN application if you have a US Social Security number or ITIN. Non-residents without either apply by fax or mail using Form SS-4, which takes longer — plan for weeks, not days. Do not apply to Mercury with "EIN pending."
3. A residence that isn't prohibited. Mercury won't accept applicants living in certain countries regardless of where the company is registered. As of September 2026 the list includes Nigeria, Pakistan, the Philippines, Ukraine, Croatia, Russia, Iran, Venezuela, and several others. It's based on where you live, not your passport, and it changes — check Mercury's own page before you start.
4. A real operating address. Where the business actually operates. Your home address is fine. A PO box, a UPS store box, or your registered agent's address is not, and using one is the single most common reason for a decline or a later account closure.

Not sure? The business bank account finder sorts this out in five questions.

Step 2: Gather the documents

Requirements per Mercury's FAQ and application flow, September 2026. Mercury may ask for more during review; that's normal, and answering quickly and completely is what keeps an application moving.

Step 3: Apply

1. Start the application on Mercury's site — through a partner link if you're using one, since referral tracking only works if you begin there.
2. Enter the company: legal name exactly as filed, state of formation, EIN, entity type, and the operating address.
3. Describe the business. Be specific and boring. "Freelance web development for US small businesses; paid by ACH and card; 3–6 clients a month" beats "consulting." Vague descriptions get follow-up questions; specific ones get approved.
4. Add every beneficial owner at 25%+ and anyone who'll control the account. Each verifies their identity separately.
5. Upload documents and submit. Expect a confirmation email and, often, one or two follow-up questions from the review team.

Mercury's own estimate for the form is about ten minutes. Review is usually a few business days for a US-based founder with clean documents, and longer — sometimes a couple of weeks — for non-resident applications.

Step 4: Fund it and set it up

Mercury accepts ACH transfers, wires, and mobile check deposits. It does not accept cash — there is no way to deposit it, so if cash is part of your business, know that before you open the account. Once funded, set up the things that make the account useful: a separate sub-account for taxes, a card for business spend, and the accounting connection to QuickBooks or Xero. Then point your invoices at it — InvoiceBloom puts your Mercury account details on every invoice so clients pay by ACH straight into it.

Why eligible applications still get declined

These are the patterns that come up again and again, especially for non-US founders using a formation service.

• Applying the day the LLC is formed. A company with no history, no website, and no activity looks like a shell. Give it a few weeks, put up a site, get the domain email working, sign a client if you can.
• Registered-agent address as the operating address. Mercury knows what those addresses are. Use where you actually work.
• "EIN pending." Wait for the number.
• A holding company as the owner. Mercury wants natural persons at the 25% level. Layers of entities slow or stop the review.
• Describing prohibited activity. Cryptocurrency trading, payments on behalf of third parties, and money-services activity are outside what Mercury supports. Say what you actually do; if it's one of these, Mercury isn't your account.
• Ignoring follow-up questions. Review teams close applications that go quiet.

Is Mercury a bank?

No. Mercury is a financial technology company; your money is held at its partner banks, and deposits are FDIC-insured through those banks using sweep networks — Mercury states coverage up to $5 million. The FDIC's deposit insurance page explains the mechanics. You're relying on Mercury's software and its bank partnerships, not a branch — fine for most online businesses, but worth understanding before you move your operating cash there.

If you don't qualify

• Sole proprietor: Novo and Bluevine accept an SSN; Found is built for single-owner self-employed people with no employees.
• Prohibited country of residence: Payoneer provides US receiving account details for ACH payments without a US entity; Wise Business works in many countries, though not all.
• No entity yet, living abroad: form the US LLC and get the EIN first, then apply once the business has a footprint. In the meantime Payoneer or Wise can receive USD.