Mercury Bank for Non-US LLC Owners: Complete Setup Guide

TL;DR: Mercury is a popular option for a Mercury bank foreign LLC because its online onboarding and API-friendly tools often accept non-US owners. To open an account you’ll need your LLC formation docs, EIN, owner IDs, and clear business information; if rejected, ask for reasons and consider remedies or alternatives like Relay.

Estimated reading time: 8 minutes

Lo que vas a aprender

Qué documentos y pasos necesitás para un Mercury bank setup con una foreign-owned LLC.
Consejos prácticos para aumentar chances de aprobación como Mercury non-US owner.
Funcionalidades clave (cards, transfers, integrations) y cómo se usan en la práctica.
Qué hacer si te rechazan y cómo comparar Mercury vs Relay.

Context: why founders search for "Mercury bank foreign LLC" and "Mercury non-US owner"

Many Latin American entrepreneurs form a US LLC to access global payments, US banking rails, and easier integration with platforms like Stripe, Shopify, and payroll providers. Keywords like Mercury bank foreign LLC, Mercury non-US owner, Mercury bank setup, Mercury bank review, and Mercury for foreigners reflect common searches: people want a modern, fully online bank that accepts non-US owners and connects to their stack.

Mercury is attractive because onboarding is remote and its platform is developer-friendly. Still, opening a business account as a foreign owner requires preparation: banks must satisfy KYC/AML rules, so they ask for company documents, owner IDs, and clarity about business activities and cash flows.

Step-by-step: Mercury bank setup for a foreign-owned LLC

1) Form your US LLC (or confirm it’s properly formed)

State certificate of formation (Articles/Certificate of Formation).
Operating Agreement (shows ownership percentages and manager/member powers).
If you haven’t formed the LLC yet, consider which state fits your needs (Delaware and Wyoming are common for non-residents). Rely can form the LLC and provide the Operating Agreement and BOIR.

2) Obtain an EIN (Employer Identification Number)

Mercury requires an EIN for business accounts. You can obtain an EIN online with Rely as part of their packages, or apply directly to the IRS. Rely’s plans include EIN assistance (they offer plans from USD 449 to USD 649 that cover formation, registered agent, EIN, Operating Agreement and BOIR).

3) Gather owner and company documents

Typical documents Mercury asks for (have clear, high-quality scans):

Certificate of Formation / Articles of Incorporation.
Operating Agreement showing beneficial owners.
EIN confirmation letter (IRS CP575 or EIN issuance email).
Government ID (passport) for each beneficial owner (names, DOB).
Proof of address for owners and company (utility bill, bank statement).
Business website, invoices, or contracts demonstrating activity.
Note: requirements can vary; Mercury may ask for additional paperwork depending on jurisdiction and risk profile.

4) Complete the online Mercury application

Use a professional business email tied to your domain (avoid Gmail-only addresses).
Describe business model succinctly: customers, revenue sources, sales channels, expected monthly volume.
Provide beneficial owner info (percentages, roles).
Upload documents and wait for KYC review (often a few business days).

5) Fund the account and verify functionality

Once approved, you’ll get account numbers, ACH and wire routing details, and can order physical/virtual cards.
Test ACH and a small inbound wire to confirm rails. Mercury’s platform includes an API for programmatic transfers and virtual cards creation.

Practical tips to improve approval odds (Mercury for foreigners)

Be explicit about customers and revenue: if you sell SaaS via subscriptions, explain platforms used (Stripe, Paddle). If you do freelance work, attach invoices or contracts.
Maintain a consistent online presence: active website, LinkedIn profiles for founders, and domain email help reduce friction.
Avoid ambiguous or high-risk descriptions (e.g., “crypto exchange,” “adult content,” undocumented cash-heavy operations) — these attract extra scrutiny. If your business is in a higher-risk sector, be prepared to supply licenses and more detailed compliance docs.
Apply with clear, matching information: names, addresses and ownership percentages must match formation documents and IDs.
If you’re missing an SSN, note that many non-US owners have opened Mercury accounts using passports and EINs, but results vary. Consider obtaining an ITIN if you plan more banking in the US — consult a tax professional.

Mercury account features: what to expect

Cards: Physical debit cards and virtual cards for teams and vendors. Virtual cards are useful to segregate subscriptions or vendor payments.
Transfers: ACH, domestic and international wires (Mercury supports wires and ACH rails). Processing times follow standard US banking timelines.
Integrations & API: Mercury is developer-first — you can integrate via API for payouts, automate transfers, and connect to payment processors and accounting tools. It also supports Plaid for integrations in many cases.
Multi-user access: Invite team members with role-based permissions and multiple cards/accounts for internal control.
Fee structure: Historically Mercury promotes low/no monthly fees for basic services, but confirm current fees and wire costs on their website.

(Note: always verify current feature sets and fees directly with Mercury because products evolve.)

Mercury vs Relay — quick comparison

Feature	Mercury	Relay Bank
Foreign-owner friendliness	Generally known to accept non-US owners with EIN and passports (varies)	Also popular; eligibility criteria can differ for non-US owners — check current policies
Cards & virtual cards	Physical + virtual, developer API	Physical + virtual, strong account/subaccount structure
API & integrations	Strong developer API, popular with startups	Good integrations, excels at multi-account/sub-account bookkeeping
Best for	Startups needing API, virtual cards, developer tooling	Teams needing granular subaccounts and bill pay tools

Both are solid choices; if Mercury rejects, Relay can be a good alternative — and vice versa. Specific acceptance decisions depend on KYC outcomes, business model and documentation. If unsure, Rely’s plans include help opening accounts with Mercury or Relay in some packages.

Cómo Rely te ayuda

Rely simplifies the whole path from forming a US LLC to opening a US bank account. Sus planes (desde USD 449 hasta USD 649) incluyen la constitución de la LLC, registered agent, obtención del EIN, Operating Agreement y BOIR, además de soporte por email o chat. El proceso es 100% online: no necesitás viajar a EE. UU.

Algunos planes de Rely incluyen apertura de cuenta bancaria con Mercury o Relay; el tiempo estándar para formar la LLC es de 5–7 días hábiles, y si necesitás velocidad podés usar el servicio express para formar la LLC en 1 día y estar operativo en menos de 5 días. Esto reduce mucho la fricción al solicitar una cuenta en Mercury como Mercury non-US owner.

What to do if Mercury rejects your application

Request the denial reason: ask Mercury compliance what specific documents or concerns caused the rejection.
Address gaps: supply requested ID, clearer source-of-funds documentation, contracts, or licenses.
Reapply or appeal: once you have the missing docs, submit a supplemental application or appeal.
Consider alternatives: Relay, Wise Business, traditional US banks (if you can visit), or fintechs that support non-residents. Each has different KYC thresholds.
Get professional help: if rejections persist, consult a compliance consultant or an attorney who specializes in cross-border banking. Rely can help coordinate LLC formation and bank introductions as part of some plans.

Próximos pasos

If you want a fast, guided path to form your US LLC and open a Mercury or Relay account, start with Rely. They’ll handle formation, EIN, required documents and can assist with the bank application so you can focus on growing your business.