The US Financial System for European Founders: The Complete Guide

Setting up inside the US financial system looks intimidating from Europe, but the path is well defined once you understand the order of the pieces. Here is the complete map, from entity formation through to your first US bank account and card.

Why European founders bother with the US financial system at all

Most European founders who look into this are not trying to relocate. They are trying to sell software, get paid by US customers, use US payment processors, or simply present a US billing entity to clients who expect one. The US financial system gives you a few concrete things that are hard to replicate from Europe alone.

• A US legal entity that customers, marketplaces, and payment processors recognise without hesitation
• A US bank account that receives USD without the delays or fees of a European bank pulling funds through correspondent banks
• Access to Stripe, PayPal, and similar processors under terms designed for US businesses
• A US business credit card and, over time, a US credit history that opens further financing
• A degree of separation between your personal finances and your business, and often between your business and your home country tax residency for the business itself

None of this requires you to move, hold a US visa, or spend time in the country. The entire journey can be done remotely, which is the whole premise of how European founders now approach the US market.

The five pieces, and the order they go in

The confusion most founders run into is not any single step, it is not knowing how the pieces depend on each other. In practice there is a fixed order.

• 1. Form a US LLC in a chosen state, this creates the legal entity everything else attaches to
• 2. Get an EIN (Employer Identification Number) for that LLC, this is the entity's tax ID and the key that unlocks banking
• 3. Get an ITIN (Individual Taxpayer Identification Number) for yourself, needed in some banking and tax situations though not always required upfront
• 4. Open a US business bank account remotely, using the LLC and EIN
• 5. Apply for a US business card and start building a US credit file

Running alongside all of this is an ongoing compliance obligation, mainly Form 5472, that a lot of founders only discover after the fact. We cover that fully below and in a dedicated guide, but it is worth flagging early because it shapes decisions you make at step one.

Step 1: Forming the US LLC, and choosing a state

A Limited Liability Company is the standard vehicle for a foreign-owned single-member business in the US. It is cheap to set up, gives you liability protection, and by default is treated as a "disregarded entity" for US tax purposes, meaning the LLC itself usually does not pay federal income tax, its activity flows through to the owner.

The harder question is which state. You are not required to form in the state where you do business, and for a remote, non-US-resident founder, the state you pick is really about cost, privacy, and ongoing paperwork, not physical presence.

For most European founders running an online business, a services company, or a small e-commerce operation, Wyoming ends up the practical default. It keeps annual costs and admin low while still giving you a legally solid, bank-friendly LLC. If you are actively raising a funding round from US investors, that calculus changes and a Delaware C-Corp conversation is worth having separately.

Step 2: Getting your EIN

The EIN is issued by the IRS and functions like a social security number for your business. You need it to open a US bank account, to file the annual compliance return, and often to sign up with payment processors.

For a US citizen, this is a five-minute online application. For a non-US founder without a Social Security Number, the process is different and slower: you complete Form SS-4 and, because the IRS's online EIN tool is not available to applicants without an SSN or ITIN, you submit it by fax or mail to the IRS's international unit. There is no requirement to have an ITIN first, and no requirement to visit the US or hold a visa. Processing by fax generally takes a matter of weeks rather than the same-day turnaround US residents get online, so this step is the one most likely to create a bottleneck if you leave it to the last minute.

Some founders get stuck here simply because the SS-4 form asks for information (like a "responsible party" SSN or ITIN field) that does not clearly apply to a foreign individual, and small errors on the form are a common reason for delay or rejection. This is one of the reasons a done-for-you service exists: Founders Credit handles LLC formation and the EIN application together as one flow, so the form is filled out correctly the first time and you are not the one on hold with the IRS.

Step 3: Do you need an ITIN?

An ITIN is a tax processing number for individuals who are not eligible for a Social Security Number but still have a US tax filing obligation or need to be identified to the IRS, for example as the owner of an LLC. It is obtained via Form W-7, generally filed alongside a tax return or a specific qualifying document.

A few things founders often get wrong about the ITIN:

• You do not need a US visa, a US address, or to have ever visited the US to get one
• The EIN for your LLC does not require you to have an ITIN first, the two are independent numbers
• Some banks will open an account with just the LLC and EIN, others will ask for the owner's ITIN or passport as part of their identity verification, this varies by bank
• You will need an ITIN if you personally have a US tax filing requirement, for example if the LLC's income needs to be reported on a personal US return in certain scenarios, or if you want to claim benefits under a tax treaty

In short, the ITIN is not always mandatory on day one, but most founders end up needing one at some point, either for banking or for tax filing, so it is worth planning for rather than treating as an afterthought.

Step 4: Opening a US business bank account remotely

This used to be the hardest step for non-US founders: US banks historically wanted an in-person visit, a US address, and often an SSN. That has changed. Fintech-forward banking providers built specifically for remote founders, such as Mercury, Wise Business, and Relay, now onboard non-US LLC owners entirely online, using the LLC formation documents, the EIN, and a passport for identity verification.

What you typically need ready before applying:

• Your LLC formation documents (certificate of formation, articles of organization)
• Your EIN confirmation letter from the IRS
• A valid passport
• A description of your business activity, since banks run compliance checks on what the business actually does

Each provider has its own risk appetite and industry restrictions, and approval is not automatic, banks periodically tighten or loosen their acceptance of foreign-owned LLCs, so having your paperwork clean and consistent (same business name, same address, same activity description everywhere) meaningfully improves your odds. This is also where a done-for-you setup helps: Founders Credit prepares the LLC, EIN, and supporting documents specifically in the format these banks expect, and manages the application process so you are not guessing which provider will say yes this month.

Step 5: US business cards and building US credit

Once you have a US bank account, a US business debit or charge card usually comes with it. A true credit card, one that reports to US business credit bureaus and helps you build a credit history, is a separate and slightly longer game.

A few realities worth knowing upfront:

• Most fintech business cards for new LLCs are charge cards tied to your cash balance, not revolving credit, at least initially
• Building a US business credit file takes consistent activity over months, not a single application
• Personal credit history from Europe does not transfer to the US, you are starting from zero regardless of your credit record at home
• Paying on time, keeping utilization low, and using the card for real recurring business expenses is what actually builds the file over time

The card itself matters less than the discipline behind it. Founders who treat the first card as a working capital tool rather than a personal expense account tend to build usable US credit faster, which then supports higher limits, better card products, and eventually financing.

Taxes and compliance: the part that catches people out

This is the step European founders most often underestimate, partly because "just an LLC" sounds informal and partly because the LLC itself frequently owes zero US tax. Owing zero tax and having zero filing obligation are not the same thing.

If your LLC is foreign-owned (a non-US person owns all or part of it) and it is a single-member LLC treated as disregarded for tax purposes, the IRS treats it as a domestic corporation solely for reporting purposes. That triggers two things every year:

• Form 5472, an informational return disclosing transactions between the LLC and its foreign owner
• A pro-forma Form 1120 filed as a cover sheet for the 5472

Both are required even if the LLC had zero revenue and zero activity all year. The IRS penalty for failing to file Form 5472 on time is 25,000 dollars, and it applies per form, per year, regardless of whether the business made any money. This is an informational filing, not a tax bill, but the penalty for skipping it is not proportional to your revenue, which is exactly why it surprises dormant or pre-revenue LLCs the most.

Beyond the federal 5472 and pro-forma 1120, expect a small annual state filing (Wyoming's annual report, for example) and possibly a state franchise or licensing fee depending on where you formed and where you do business. None of this is complicated in isolation, but it is easy to lose track of deadlines when you are running a company from a different time zone and a different tax system entirely. This is exactly the kind of ongoing compliance a done-for-you provider like Founders Credit tracks and files on your behalf, so a missed deadline never turns into a five-figure exposure.

How the whole journey fits together, start to finish

Laid out in sequence, a realistic timeline looks like this:

• Form the LLC in your chosen state (days, mostly paperwork and state processing time)
• Apply for the EIN by fax as a non-US applicant (typically several weeks given IRS processing)
• Apply for an ITIN if your situation requires one, either now or when a bank or tax filing asks for it
• Open a US business bank account once the EIN confirmation letter arrives
• Apply for a business card tied to the new account and start using it for real expenses
• Diarise the annual Form 5472 and pro-forma 1120 deadline, plus your state's annual report

Done piece by piece and unassisted, this typically takes a European founder anywhere from a few weeks to a couple of months, with the EIN fax processing usually the longest single wait. Done as a coordinated, done-for-you package, the sequencing problem mostly disappears, because the entity, EIN, banking application, and compliance calendar are set up together from day one rather than assembled reactively.

Where to go deeper

This guide is the map. Each step has enough nuance to deserve its own closer look, particularly EIN processing for non-US applicants, the ITIN application in detail, a side-by-side of Mercury, Wise, and Relay for foreign-owned LLCs, and a full breakdown of Form 5472 and the 5,472 penalty exposure. If you are at the point of actually choosing a state or a bank, those dedicated guides are the next useful read.

Frequently asked questions