Startup Expansion to the US: A Practical Checklist

The US is the biggest prize on many founders' maps, and also one of the most confusing places to set up. It is not one market with one set of rules: it is a federal system with 50 states, each with its own registrations, taxes and employment laws. This startup expansion to the US checklist breaks the move into clear stages, so you can win American customers first and add a legal presence without tripping over the details.

A yellow taxi driving down a city street between tall buildings with traffic and pedestrians around it — Entering the US is a series of practical steps, and the first one is finding customers.

Key takeaways

Win a few US customers from your home company before you form a US entity or move anyone.
If you plan to raise from US venture investors, most expect a Delaware C-Corp; an LLC can suit a business that will not raise venture money.
Forming a company in one state does not cover the others: you may need to register, collect sales tax and run payroll wherever you have people or significant sales.
Plan banking, an EIN, payroll, benefits and immigration early, because each can take weeks.

Founders from the UK, Europe and elsewhere often hear two conflicting pieces of advice: "you must have a Delaware company to be taken seriously" and "do not set up in the US until you have to." Both contain some truth. The right timing depends on whether you are raising money from US investors, hiring US staff or simply selling to US buyers. This guide helps you work out which of those applies and what to do in each case.

A quick note: this article is general information about US expansion, not legal, tax or immigration advice. US rules vary by state and change over time, so check official sources such as the IRS, your state's business filing office and USCIS, and work with a US accountant and attorney who know cross-border startups.

Prove US demand before you incorporate

Most software and service businesses can sell to US customers from their existing company. Use that period to learn, not just to sell.

Segment. Which industries, company sizes and regions buy from you? The US is big enough that "the US" is not a target.
Sales motion. US buyers often move fast but expect quick replies, clear pricing and responsive support in their time zone.
Paperwork. Note whether buyers ask for a W-9 or W-8BEN-E form, security questionnaires, insurance certificates or a US contracting entity.
Payments. Track how many customers want to pay in $ by ACH or card, and how often currency conversion slows deals.

If you are reading this in mid April, you will notice US customers are distracted: federal income tax returns for individuals and C-corps are due 15 April 2027. It is a good reminder that the US tax calendar will soon be your calendar too.

Pro tip

Keep a simple "US asks" log. Every time a prospect asks for something you cannot provide, such as a US entity, a local phone number or a specific insurance certificate, add it with the deal size. After a few months, the log tells you exactly which setup steps are worth paying for.

Choose your US entity

When the time comes, the biggest early decision is the type of entity and where to form it.

Delaware C-Corp

Most US venture investors expect a Delaware C-Corp, because it allows preferred stock and option pools and its corporate law is familiar to them. Delaware charges an annual franchise tax, so put that on your calendar. Some foreign founders "flip" their home company so that a new Delaware C-Corp becomes the parent. A flip can have tax consequences in your home country, so get advice on both sides before you start.

LLC

An LLC offers pass-through taxation and simpler early admin, which can suit bootstrapped businesses or service firms. Pass-through treatment can be awkward for foreign owners and is generally not what venture investors want, so check the tax position for your owners before choosing one.

US subsidiary of your home company

If you are not raising in the US, a common middle path is a US subsidiary, often a C-Corp, owned by your existing company. It gives you a US contracting entity and payroll home without restructuring the whole group. You will still need to set intercompany pricing for services between parent and subsidiary.

Common mistake

Assuming a Delaware company lets you ignore every other state. If your team works in California, Texas or New York, your company will usually need to register there as a foreign entity, file reports and possibly pay state taxes. Delaware is where the company is formed, not where it operates.

Your US setup checklist, step by step

Here is a practical order for the core setup. Many steps can overlap, but this sequence avoids the classic delays.

Form the entity. File with the state, appoint a registered agent, adopt bylaws or an operating agreement and issue founder shares.
File any 83(b) election on time. If founders receive restricted stock that vests, an 83(b) election must be filed within 30 days. Missing it can create a painful tax result later.
Get an EIN. The IRS issues an Employer Identification Number, which you need for banking, payroll and tax filings. Founders without a US Social Security number may need to apply by a different route, so allow extra time.
Open a US bank account. Banks will want formation documents, the EIN and identity details for owners. Some accept remote applications; others want an in-person visit.
Register in the states where you operate. Wherever you have employees or an office, check foreign qualification, state tax registration and any local business licenses.
Review sales tax. After the 2018 Wayfair decision, states can require remote sellers to collect sales tax once they pass economic nexus thresholds, which vary by state. Some states tax software or digital services, and many marketplaces collect on sellers' behalf.
Set up payroll and benefits. Choose a payroll provider or a PEO, and decide what health and retirement benefits you will offer, since US candidates often compare these closely.
Build your filing calendar. Add federal tax deadlines, state annual reports, Delaware franchise tax and payroll filings to one shared calendar.

A person walking along a city sidewalk between tall buildings on a bright day — One step at a time: entity, EIN, bank, state registrations, then hiring.

Hiring and moving people to the US

US hiring has a reputation for being flexible, and in some ways it is. Many states follow at-will employment. But there are still federal, state and sometimes city rules on pay, overtime, leave, discrimination and workplace safety, and they differ from place to place.

Employees and contractors

Classify people correctly. The IRS, the Department of Labor and some states each apply their own tests, and a contractor who works like an employee can create back taxes and penalties. If in doubt, ask a US employment attorney.

Paperwork for new employees

Form I-9. Every US employer verifies identity and work authorization for each new hire.
Tax forms. New employees complete federal and, where relevant, state withholding forms.
State new hire reporting and notices. States require new hire reports and workplace posters; check the rules where each person works.
Workers' compensation. Most states require it once you have employees.
Safety. OSHA's general duty clause expects employers to keep workplaces free from recognized serious hazards.

Equity and visas

US employees often expect stock options. Options are usually priced at fair market value based on a 409A valuation, and the choice between ISOs and NSOs affects tax for the employee. If a founder or team member needs to move to the US, visa options depend on their background, the role and the company, and processing times can be long. Speak to an immigration attorney before you announce a relocation date.

Hypothetical example

Imagine Tom and Ayesha, cofounders of a London analytics startup. They sell to eight US customers from their UK company, then raise a seed round led by a US fund that asks for a Delaware C-Corp parent. Their advisers handle a flip, the founders file 83(b) elections within 30 days, and they hire their first US account executive in Texas. Because the employee works there, the company registers in Texas, sets up payroll through a provider and adds the state's annual report to the shared calendar.

Contracts, privacy, banking and credit

Several smaller items make day-to-day operations smoother once you are live.

Contracts. Decide which entity signs US deals and which state's law governs them. Many US buyers prefer US law and a US counterparty.
Privacy. The US has no single federal privacy law like GDPR. Instead, a growing number of US state privacy laws apply based on where customers live and your size or activities. Map which ones may apply and update your privacy notice.
Email marketing. CAN-SPAM requires a clear unsubscribe option and a valid physical postal address in commercial emails.
Business credit. Dun & Bradstreet (D-U-N-S number), Experian Business and Equifax Business keep business credit files. Some enterprise buyers ask for a D-U-N-S number during vendor setup.
Insurance. Customers often ask for general liability, professional liability or cyber cover, sometimes with specific certificate wording.

A US expansion tracker template

Copy this into a spreadsheet so every task has an owner, a state and a date. The rows are made-up examples.

Task	State or agency	Owner	Target date (example)	Status	Recurring?
Form C-Corp and appoint registered agent	Delaware	Founder and attorney	Week 1	Done	Franchise tax yearly
Apply for EIN	IRS	Accountant	Week 2	In progress	No
Register as foreign entity and for payroll tax	Texas (example)	Finance lead	Week 5	Not started	Annual report

Add a column called "deadline source" with the agency name, so whoever takes over the tracker knows where to check each date.

Your first 90 days as a US company

Once the setup is moving, keep your attention on customers.

Days 1 to 30: add a US address and phone number, show $ pricing, set support hours to cover US time zones and give US prospects a W-9 from the new entity.
Days 31 to 60: write a US customer case study, pick one or two trade events and ask happy customers for introductions.
Days 61 to 90: compare US sales cycle, deal size and churn with your home market, and decide whether your next hire should be in sales, support or success.

Your US expansion checklist

Sell to US customers from your home company and keep a "US asks" log
Decide between a Delaware C-Corp, LLC or US subsidiary with advisers on both sides
File any 83(b) elections within 30 days of receiving restricted stock
Get an EIN and open a US bank account
Register in each state where you have staff or an office
Review sales tax nexus and marketplace collection
Set up payroll, benefits, I-9s and workers' compensation before the first hire
Update contracts, privacy notice and email marketing for US rules
Put federal, state and franchise tax dates in one shared calendar

Frequently asked questions

Do I need a US company to sell to US customers?

Often not. Many startups sell from their home company for a long time. You may still have US tax questions, such as sales tax or income tax treaties, so ask an accountant once US revenue becomes meaningful.

Is Delaware always the right state?

Delaware is the common choice for venture-backed startups because investors know it well. If you will not raise venture money, forming in the state where you operate can be simpler. Either way, you register in the states where you actually do business.

Can a foreign founder own a US company?

Generally yes. Owning a company is different from being allowed to work in the US, which depends on your visa or immigration status. Keep the two questions separate and get immigration advice before working on US soil.

The bottom line

A US expansion works best in stages: prove demand from home, choose an entity that matches your funding plans, then work through the EIN, bank, state registrations, sales tax and payroll in order. Remember that Delaware is where you form, not where you comply, and that every state with staff or significant sales may have its own rules.

Start today with the "US asks" log and the tracker template. When the log tells you it is time, bring a US accountant and attorney in together and work through the checklist one row at a time.