A UK Founder's Guide to Registering a Company in the US

Before you even think about paperwork, there are two massive decisions you need to get right: what kind of company you’ll form and which state you’ll register it in. These aren't just tick-box exercises; they fundamentally shape your US tax obligations, personal liability, and, crucially, your ability to attract investment down the line.

Getting these right from the start saves a world of headaches later.

Choosing Your US Business Structure and State

For most UK founders heading Stateside, the choice boils down to two structures: the Limited Liability Company (LLC) or the C Corporation. Each has its place, and picking the right one depends entirely on your vision for the business.

Let's break down what that means in practice.

LLC vs C Corporation for UK Founders

Think of the LLC as your go-to for simplicity and flexibility. It gives you personal liability protection, just like a UK Limited Company, meaning your personal assets are kept separate from the business's debts. Tax-wise, it’s a "pass-through" entity. This means profits flow directly to you as the owner, and you report them on your personal tax returns, neatly sidestepping corporate-level taxes in the US.

The C Corporation, on the other hand, is a much more formal beast. It's a completely separate legal and tax entity. This structure leads to what’s often called "double taxation"—the corporation pays tax on its profits, and then shareholders pay tax again on any dividends they receive. So why would anyone choose it? Simple: it’s the only structure that lets you issue different classes of stock, making it the non-negotiable standard for any startup aiming to raise money from US venture capitalists.

For a UK founder, the decision often boils down to this: An LLC is ideal for operational simplicity and tax flexibility, perfect for e-commerce, consulting, or holding companies. A C-Corp is the non-negotiable choice for any business with ambitions of securing US venture capital funding.

This visual should help clarify that key decision point.

Ultimately, your long-term goal—be it straightforward operations or a VC-funded rocket ship—should guide this choice.

To make it even clearer, here's a side-by-side comparison tailored for UK entrepreneurs.

LLC vs C Corporation at a Glance for UK Founders

Feature	LLC (Limited Liability Company)	C Corporation
Best For	E-commerce, consultants, solo founders, and service-based businesses.	Startups planning to raise VC funding or go public (IPO).
Taxation	Pass-through. Profits are taxed once on the owner's personal return.	Double taxation. The corporation pays tax, then shareholders pay tax on dividends.
Ownership	Flexible. Owned by "members." Can have one or many.	Rigid. Owned by shareholders. Required to have a board of directors.
Fundraising	Difficult to attract VC investment.	The standard for US venture capital. Can issue multiple classes of stock.
Admin	Lower admin, fewer formalities required.	Higher admin burden. Requires annual meetings, minutes, and bylaws.
Privacy	Can offer excellent anonymity, especially in states like Wyoming.	Ownership is generally more public.

This table simplifies the main differences, but your specific circumstances will always be the deciding factor.

Why Your Choice of State Matters

Once you’ve settled on a structure, you need to decide where to register it. In the US, you don’t register a company nationally like you do with Companies House in the UK. Instead, you incorporate in a single state, and that state’s laws will govern your business.

The good news? You don't have to live or even have an office in the state you choose. This is exactly why most international founders flock to a handful of business-friendly states.

Here are the three most popular options for UK founders:

• Delaware: The undisputed king for C Corporations. Investors love Delaware because its specialised business court, the Court of Chancery, has a long-established history of handling corporate legal matters predictably and fairly. It’s no surprise over 68% of Fortune 500 companies call it home.

• Wyoming: The top choice for LLCs, hands down. It offers incredible privacy protection (owner names aren't listed on public records), has no state corporate or personal income tax, and keeps annual fees incredibly low.

• Nevada: Another strong contender, especially for those seeking privacy. Like Wyoming, Nevada boasts no state income tax, making it an attractive and low-cost alternative.

Picking the wrong state can saddle you with higher taxes, more paperwork, and unexpected legal issues. To get a much deeper look at the options, check out our guide on the 10 best states for LLC formation for UK founders in 2026. Nailing these foundational decisions is the first real step to building a successful and compliant US business.

Getting Down to Brass Tacks: Paperwork and Your EIN

Alright, you've decided on your business structure and picked a state. Now comes the part where your US company goes from being an idea to a real, legal entity. This is all about filing the right documents with the state and getting your tax number from the IRS.

It’s not rocket science, but it’s a process that demands you get the details right. I've seen simple mistakes on a form snowball into weeks, or even months, of delays for founders. A little precision now saves a massive headache later.

Making It Official: Filing Your Formation Documents

The first piece of paper you’ll file is what officially creates your company. The name of this document changes depending on your business structure:

• For an LLC, you'll file the Articles of Organization.

• For a C Corporation, it's the Articles of Incorporation.

Think of this document as your company’s birth certificate. It lays out the basics: the business name, its official address in the state, and the details of your Registered Agent. Thankfully, most states have straightforward online filing systems now, which makes things much quicker than the old days of snail mail.

My Two Cents: Before you even think about filing, do a quick name search on your chosen state's Secretary of State website. It takes five minutes and can save you from having your application rejected right out of the gate because someone else already has your name.

Once the state approves your filing, they'll send back a stamped, official copy. Guard this document with your life. You’ll need it for just about everything that comes next, from getting a bank account to setting up payment processors.

The Non-Negotiable: Your Registered Agent

Every single US state requires you to have a Registered Agent. This is a person or company with a physical street address in your state of incorporation, appointed to receive official mail and legal notices on your company's behalf.

As a UK founder, you won't have a physical presence, so hiring a commercial Registered Agent service is your only real path forward. Their job is to be your official point of contact on the ground, making sure you get critical documents like tax notices or, in a worst-case scenario, a legal summons.

Don't treat this as a box-ticking exercise. If you fail to maintain a Registered Agent, the state can administratively dissolve your company for being non-compliant. It’s a foundational piece of your US setup.

The All-Important EIN

With your company officially formed, your next mission is to get an Employer Identification Number (EIN) from the IRS. This unique nine-digit number is essentially a tax ID for your business. It's absolutely mandatory for:

• Opening a US business bank account

• Hiring any US-based employees

• Filing your federal tax returns

• Simply looking credible to American suppliers and partners

Now, here's the catch for UK founders. Because you don't have a US Social Security Number (SSN), you can't use the simple online EIN application. Instead, you have to file Form SS-4, Application for Employer Identification Number, and this is where many non-residents get stuck.

The form needs to be filled out perfectly, especially the sections on the "responsible party" and your UK address. The smallest error can get your application bounced right back to you. We break down exactly how to handle this in our guide on how UK founders can get an EIN.

Your submission method also makes a huge difference. You can mail the form, but be prepared to wait two months or more. The pro move is to fax it. By faxing the Form SS-4, you can usually get your EIN back from the IRS in just one to two weeks. Once that number is in your hands, you’re truly ready to start operating in the US.

Building Your US Operational and Financial Footprint

Alright, the legal paperwork is done and your EIN is in hand. Your US company officially exists, but right now, it's just a name on a few documents. The next step is what makes it real—giving it a proper address and a place to handle its money.

This isn't just about ticking boxes. Getting these two pieces right is fundamental to building trust with American customers, suppliers, and especially the banks. For a founder back in the UK, this is the bridge from a legal concept to a fully operational US business.

More Than Just a Mailbox: Your US Business Address

Here’s a common pitfall I see UK founders stumble into: they assume their Registered Agent's address is all they need. It isn’t. That address is purely for official legal mail and using it for your day-to-day business operations looks unprofessional.

What you actually need is a virtual business address. This gives you a unique suite number in a real commercial building, projecting a credible, professional image. When a potential US client looks you up, they'll see a legitimate business location, not a generic office shared by thousands of other companies.

A professional virtual address is a signal of legitimacy. It’s what allows US banks, payment gateways like Stripe, and suppliers to verify your operational presence, often unlocking services that would otherwise be unavailable to a company with a non-US address.

These services also scan and digitise your mail, so you can manage everything from your laptop in the UK. It’s an essential tool for running a company from thousands of miles away.

Getting a US Bank Account Without the Jet Lag

Not long ago, opening a US bank account as a non-resident meant booking a flight. Thankfully, that's changed. The rise of fintech platforms and banks built for international founders has made remote setup the new standard.

The challenge now isn't if you can open an account, but which one to choose. Most traditional high-street banks still want you to walk into a branch, which is a non-starter. The clear winners are the modern digital banks and fintechs who have built their entire onboarding process around founders just like you.

To get started, you’ll need a few key documents on hand:

• Articles of Organization/Incorporation: This is your company’s birth certificate.

• EIN Confirmation Letter: The official tax ID document from the IRS (Form CP 575).

• Passport: Standard personal ID for the business owner.

• US Business Address: This is why that virtual address is so important.

This move toward borderless business is huge. The global market for international company registration is set to hit $9.97 billion by 2025, growing at a massive 12.64% CAGR. This explosion is driven by founders aggressively expanding into new markets, and you can read the full research on this market growth to see just how big this trend is.

Choosing the right bank is a critical decision, so we've put together a full breakdown of the best options. For a deep dive, check out our expert guide to opening a U.S. bank account online for non-residents. With an account open, you’ll have the financial engine to get paid, manage expenses, and keep your books clean for both the IRS and HMRC.

Managing Your Ongoing US Tax and Compliance Obligations

Getting your US company registered is a huge milestone, but now the real work begins. Think of your formation documents as your company's passport—it gets you in the door. Your ongoing compliance filings are the visas that keep you there legally.

For a UK founder, this means staying on top of requirements from two different governments: the IRS in the US and HMRC back home. Dropping the ball on this isn't an option. It can lead to fines, penalties, and even the state dissolving your company, wiping out all your hard work.

Your Core Annual US Checklist

Every year, you'll have a set of non-negotiable tasks to keep your US company in good standing. While the exact details can shift depending on your state and whether you're an LLC or C-Corp, a few key duties will be on your calendar without fail.

• Federal and State Tax Returns: This is the big one. Your company structure dictates the forms you'll file with the IRS. For foreign-owned single-member LLCs, this usually means filing a Form 1120 pro-forma return along with the critical Form 5472 to report transactions with foreign owners. You'll likely have state-level tax returns to worry about, too.

• Annual Reports: Most states require an annual or biennial report to keep your company's information current. It’s a simple filing to confirm details like your address and registered agent, but failing to submit it is one of the fastest ways to lose your good standing.

• Franchise Taxes: Don't let the name fool you—this isn't just for franchises. States like Delaware charge a "franchise tax," which is essentially a fee for the privilege of being incorporated there. You have to pay it every year, even if your company made no money.

Getting these fundamentals right is the absolute bedrock of your US presence.

The Sales Tax Nexus Puzzle for E-Commerce Sellers

If you're selling anything online to US customers, you need to get familiar with the term "sales tax nexus"—fast. It’s a legal concept that establishes your business has a strong enough connection to a state to be required to collect and remit sales tax on its behalf.

It's no longer just about having a physical office. Today, nexus can be triggered by a few different tripwires:

• Economic Nexus: Hitting a certain sales volume in a state, often $100,000 in revenue or 200 separate transactions.

• Physical Nexus: Simply storing your inventory in a state—for example, in an Amazon FBA warehouse—is often enough to create a physical presence.

• Affiliate Nexus: Using affiliates or salespeople within a state to drive sales can also pull you into their tax system.

Sales tax is easily one of the trickiest areas for UK founders to navigate. Every state has its own rules, rates, and deadlines. If you ignore your nexus obligations, you could be hit with a massive bill for back taxes and penalties years down the line.

Juggling the IRS and HMRC: The Double-Taxation Myth

One of the biggest worries for UK founders is the fear of being taxed twice—once by the IRS on US profits, then again by HMRC on the same income.

Fortunately, the US-UK tax treaty was created specifically to prevent this nightmare scenario. The treaty allows you to claim a foreign tax credit, meaning taxes paid to the IRS on your US profits can generally be deducted from your UK tax bill. The end goal is that you pay the higher of the two countries' tax rates, not both.

This dual-country compliance is becoming more common. For context, across the European Union, Q2 2025 saw a 4.6% quarter-over-quarter jump in business registrations, a clear sign of the growing appetite for cross-border expansion. This mirrors the trend of UK founders looking to the US, and you can explore more insights on European business trends to see the bigger picture.

Why Pristine Bookkeeping Is Your Best Defence

None of this is manageable without one thing: clean, accurate, and up-to-date books. From day one, you have to treat your US entity's finances with military precision. That means a strict separation between business and personal expenses—no exceptions.

Using accounting software like QuickBooks or Xero isn't just a good idea; it's essential. These tools are the only way to:

1. Keep a real-time pulse on your income and expenses.

2. Reconcile your bank accounts to ensure your books are flawless.

3. Generate the financial reports your accountant needs to file your returns correctly and on time.

Trying to piece together a year's worth of financials from messy bank statements right before a deadline is a recipe for disaster. It guarantees errors, missed deductions, and a much larger bill from your accountant. For a UK founder running a US business, professional accounting support isn't a luxury—it's a necessity for staying compliant on both sides of the Atlantic.

Estimating Timelines, Costs, and When to Get Expert Help

https://www.youtube.com/watch?v=I0wnP_mwGbY

Alright, let's talk about the two biggest questions on every founder's mind: how long is this going to take, and what's it going to cost me? Planning your US launch depends entirely on getting realistic answers to these questions. The process is straightforward, but it’s definitely not instant, and the costs can vary quite a bit.

How Long Does It Really Take?

Getting your US company up and running happens in a few distinct stages. Knowing what to expect from each one helps you plan your launch without any nasty surprises.

First up is the state formation itself, and honestly, this is usually the quickest part of the whole journey. Filing your Articles of Organization or Incorporation in a go-to state like Wyoming or Delaware can be done in just a few business days to a week. If you're in a real hurry, most states offer an expedited service for an extra fee that can get you approved in as little as 24-48 hours.

Next comes the wait for your EIN. As a non-US resident without a Social Security Number, this is almost always the longest pole in the tent. After your company is officially formed, we file Form SS-4 with the IRS. If you were to mail it, you’d be looking at a painful 8-12 week wait. That's why we fax it—it’s far more efficient and typically gets your EIN confirmation back in 7-15 business days.

Once that precious EIN letter is in your hands, the final step is opening your US business bank account. The good news is that modern fintechs have made this part incredibly fast. You'll submit your formation documents and new EIN, and you can expect account approval in another 3-5 business days.

So, all in, a smooth, professionally managed process takes roughly two to four weeks from the day you start to the day you can take your first payment. Be warned, though: a single mistake on a form can easily stall the process and turn that month-long timeline into a three-month headache.

Breaking Down the Costs

Budgeting for your US expansion involves a few key costs. There shouldn't be any hidden fees, but you need to account for both the initial setup charges and the yearly costs to keep everything running.

Your one-time setup costs will generally include:

• State Filing Fee: This is the fee you pay directly to the state to register your company. It can be as low as $50 in Kentucky or over $300 in Massachusetts. Popular choices like Delaware and Wyoming sit around the $100-$125 mark.

• Professional Service Fee: When you work with a specialist like Set Up Stateside, this fee covers all the expert handling of your filings, document prep, and the crucial EIN application.

After you're set up, you’ll have a couple of ongoing annual costs to maintain your company's good standing:

• Registered Agent Fee: This is mandatory. Every US company needs one. Expect this to cost between $100 and $300 per year.

• Annual Report/Franchise Tax: Most states require an annual filing to keep your company’s information up to date. The fees can range from $0 in Ohio to several hundred dollars in a state like Delaware, depending on your company type.

The Tipping Point: When DIY Becomes a Liability

Technically, yes, you could try to navigate this process on your own. But the real question isn't can you, it's should you? For a non-resident, the path is loaded with potential traps.

Attempting a DIY US company formation from the UK can be a classic case of being 'penny wise and pound foolish.' A small mistake on an IRS form or a misunderstanding of state requirements can lead to months of delays and potential compliance issues, wiping out any initial savings.

So, when is it time to call in the experts?

• Your time is better spent on your business. You should be focused on your product, marketing, and sales—not sitting on hold with the IRS or trying to figure out a state’s clunky filing portal.

• You need it done right the first time. A delayed EIN or bank account can bring your entire US launch to a screeching halt, costing you vital momentum and early revenue.

• You're not a US tax or compliance expert. Getting details wrong on forms like the SS-4 or the annual 5472 can trigger serious red flags with the IRS.

The value of an expert partner isn’t just about filling out paperwork. It's about having someone who knows the system inside and out. An efficient business registration process is a magnet for entrepreneurs globally. Just look at Hong Kong, which registered a staggering 195,343 new companies in 2026—proof that a streamlined system fuels growth. You can discover more about Hong Kong's business registration surge to see how it's done on a massive scale.

By partnering with a firm like Set Up Stateside, you're investing in a smooth, error-free launch. It frees you up to concentrate on the only thing that matters: making your expansion into the US market a huge success.

Frequently Asked Questions

When you're looking to expand from the UK to the US, a lot of questions pop up. It's a well-trodden path, but it has its quirks. Here are the answers to the questions we hear most often from British founders just like you.

Do I Need a US Visa to Register a Company in the US from the UK?

This is a big one, and the short answer is no. It’s a common misconception that you need a visa to get started, but you absolutely don't.

As a non-resident, you have every right to own and run a US LLC or C Corporation from the comfort of your UK office. The company formation process is completely separate from personal immigration. You can get your business set up, open bank accounts, and start trading without ever stepping foot in the States.

Of course, if you later decide you want to move to the US to run the company in person, that’s when you’d need to look into getting the right visa, like the E-2 investor visa.

Which US State Is Best for a UK Founder to Register In?

There’s no single "best" state—the right choice really depends on your business model and your ambitions. That said, for UK founders, the decision almost always comes down to one of three states.

• Delaware: This is the gold standard if you plan on raising venture capital. US investors know and trust Delaware's corporate laws and its specialised Court of Chancery. It's simply what they expect to see.

• Wyoming: A fantastic choice for e-commerce brands, online businesses, or holding companies. It offers incredible privacy, charges very low annual fees, and has no state income tax.

• Florida: We see a lot of service-based businesses and consultants choosing Florida. The main draw is the lack of a state personal income tax, which can be a huge plus if you have a pass-through entity like an LLC.

Thinking through your funding plans and how much administrative work you're willing to handle will point you to the right answer.

Can I Open a US Bank Account from the UK?

Yes, you can, and it's gotten much easier over the past few years. While most high-street American banks will still insist you show up in person, a new wave of fintech platforms and digital banks has changed the game.

These modern banking partners are built for international founders and allow for a fully remote setup. You'll just need your official company formation documents, your EIN confirmation letter from the IRS, and your passport.

A quick tip: Having all your documents perfectly in order is key to a smooth process. Working with a service that has existing relationships with these banks can be a massive help, letting you skip the common hold-ups and get your account open faster.

What Are My Main Tax Obligations as a UK Director of a US Company?

Your tax situation will depend on your company structure and what you’re actually doing in the US. For a C Corporation, it’s fairly straightforward: the company pays US corporate tax on its profits. You, as the director, would then be taxed in the UK on any dividends you take.

An LLC can be a bit more complex. If you're the sole owner, the IRS treats it as a "disregarded entity." This usually means you'll have to file a US federal return (a pro-forma Form 1120 with Form 5472) to report the company's activity, even if there's no tax to pay. You may also have filing requirements in your state of registration.

This is one area where you really don’t want to guess. Getting professional advice that covers both US and UK tax law is critical to staying compliant with the IRS and HMRC—and making sure you use the US-UK tax treaty to avoid paying tax twice on the same income.

---

Ready to launch your US venture with confidence? The team at Set Up Stateside offers end-to-end formation, accounting, and tax compliance services specifically for UK founders. We handle every detail, from state selection and EIN filing to ongoing bookkeeping and tax returns, so you can focus on growth. https://www.setupstateside.com