A foreign corporation operating in the US usually needs a separate US checking account, but the requirement depends on where it's incorporated and how it does business

If your foreign corporation has a US presence—employees, an office, customers, contracts—a US bank will almost certainly require you to open a separate account in the corporation's name. Banks treat a foreign corporation as a distinct legal entity from its owners, and they need to verify that entity's tax status and ownership structure before opening an account. A personal checking account in your name does not satisfy this requirement, and mixing personal and business funds creates tax and liability problems that can follow you across borders.

The practical answer is simpler than the legal one: if you are doing business in the US, you need a US business account. If you are only receiving occasional payments or have no US operations, you may be able to use a personal account temporarily, but this creates compliance gaps that grow expensive to fix later.

Key Takeaways

  • A foreign corporation conducting business in the US must open a separate checking account in the corporation's name, not a personal account.
  • US banks require an Individual Taxpayer Identification Number (ITIN) or Employer Identification Number (EIN) for a foreign corporation, plus proof of incorporation and ownership structure.
  • Mixing personal and business funds violates the corporate veil and can expose you to personal liability in US lawsuits and tax disputes.
  • Some banks accept foreign corporations without a physical US office, but many require a US address or registered agent before opening an account.
  • The account must be opened in the corporation's legal name as it appears on your articles of incorporation, not a trade name or abbreviation.

When a separate account is legally required

A foreign corporation is required to maintain a separate business account if it is registered to do business in any US state. Registration happens when the corporation has a physical presence (office, employees, inventory), enters into contracts, or generates income from US sources. Once registered, the corporation is a legal entity in that state, and the state's business laws treat it the same as a domestic corporation—including the requirement to keep business funds separate from personal funds.

If your foreign corporation is not registered in any US state but receives occasional payments from US clients, the legal requirement is less clear, but the practical and tax requirement remains: you must track business income separately and report it to the IRS. A personal account makes this tracking nearly impossible and raises red flags during an audit.

The separation requirement exists to protect you. If you mix personal and business funds, a creditor or plaintiff in a lawsuit can argue that the corporation is not a real entity—that it is just you using a corporate name. If they succeed, they can go after your personal assets, not just the corporation's. This is called piercing the corporate veil, and it happens most often when owners fail to maintain separate accounts.

What US banks require from a foreign corporation

A US bank will ask for several documents before opening an account for a foreign corporation. The exact list varies by bank, but expect to provide: a copy of your articles of incorporation (or equivalent document from your home country), proof of ownership or a corporate resolution authorizing the account, and a tax identification number.

For the tax ID, you have two options. If the corporation has no US employees and no permanent US office, you can obtain an Individual Taxpayer Identification Number (ITIN) by filing Form W-7 with the IRS. If the corporation has US employees or a permanent establishment, you need an Employer Identification Number (EIN), obtained by filing Form SS-4. An EIN is also required if you plan to hire contractors or have ongoing US business activity. The EIN process is faster—you can receive one the same day you file online—while an ITIN takes four to six weeks.

Many banks also require a US address for the account. This can be a registered agent's address, a mail forwarding service, or an office address. Some banks will not open an account for a foreign corporation without a US physical address, so call ahead before explore. A few banks, including some online-only institutions, are more flexible, but they are the exception.

How to open a US checking account as a foreign corporation

Start by obtaining your tax ID (ITIN or EIN) if you do not have one. You can file Form SS-4 for an EIN online at the IRS website and receive a number when ready. If you need an ITIN, file Form W-7 by mail or through an IRS office in your country, and allow four to six weeks.

Next, contact banks directly and ask whether they accept foreign corporations. Large national banks like Bank of America, Wells Fargo, and Chase have processes for this, but their requirements vary by location and by the corporation's home country. Smaller regional banks may be more flexible or may refuse outright. Online banks like Mercury, Wise, and Stripe are increasingly willing to open accounts for foreign corporations, though they may have higher minimum balances or different fee structures.

When you explore, bring your tax ID, articles of incorporation, proof of ownership (such as a corporate resolution or certificate of good standing from your home country), and a US address. Some banks will ask for a personal ID from the owner or authorized signatory. Be prepared to explain what the corporation does and where its income comes from. Banks are required to verify the source of funds under anti-money-laundering rules, so they will ask questions about your business model.

The account opening process usually takes one to two weeks once you submit documents. Some banks will open the account provisionally and then freeze it if they cannot verify your information, so follow up if you do not hear back within a week.

What happens if you use a personal account instead

Using a personal checking account for business income creates three when ready problems: tax reporting errors, loss of liability protection, and difficulty proving business expenses.

The IRS expects business income to be reported on a business tax return (Form 1120-F for foreign corporations), not on a personal return. If income flows through a personal account, the IRS may assume it is personal income and assess additional taxes and penalties. When you are audited—and foreign corporations are audited more often than domestic ones—the IRS will ask to see business records. A personal account with mixed transactions makes it nearly impossible to prove which deposits are business income and which are personal.

Second, mixing funds weakens the corporate structure. If someone sues your corporation, their lawyer will argue that the corporation is not a real separate entity because you did not treat it as one. If they convince a court, you become personally liable for the judgment. This is especially dangerous in the US, where lawsuit judgments are large and enforceable against personal assets.

Third, you cannot deduct business expenses without clear records. If you pay for office supplies, software, or travel from a personal account, you have to prove those expenses were business-related. A business account with business transactions makes this proof automatic.

Special cases: subsidiaries and branches

If your foreign corporation has created a US subsidiary (a separate US corporation owned by the foreign parent), the subsidiary must have its own account. The subsidiary is a different legal entity and must maintain separate finances. This is actually the preferred structure for many foreign corporations because it limits liability to the subsidiary and protects the parent company's assets.

If you have registered your foreign corporation as a branch in the US (rather than creating a subsidiary), the branch is not a separate legal entity—it is part of the foreign corporation. In this case, you still need a separate US checking account, but it is opened in the foreign corporation's name, not a new entity's name. The account should be labeled to show it is a branch account (for example, "XYZ Corporation, US Branch").

Frequently Asked Questions

Can I use a personal account if my foreign corporation is very small?

Not without risk. Even a small corporation is a legal entity, and the IRS expects business income to be reported separately. A personal account creates audit exposure and makes you personally liable if the corporation is sued. If opening a business account is difficult, a business savings account or a second personal account labeled for business use is better than mixing funds in one account.

What if my home country's bank won't let me open a US account remotely?

Some US banks will open accounts for foreign corporations without requiring a visit to a branch. Mercury, Wise, and Stripe are known for accepting remote applications from foreign businesses. You can also use a registered agent service that will hold a US address for you and help with the process. This costs $100 to $300 per year but makes the process much faster.

Do I need a separate account for each US state where I'm registered?

No. One US checking account is sufficient for a foreign corporation registered in multiple states. The account should be in the corporation's legal name, and you can use it for all US business activity. Some corporations open separate accounts for different divisions or projects, but this is optional and usually done for accounting purposes, not legal ones.

What if the bank asks for a Social Security number?

A bank should not require a personal Social Security number for a business account opened in the corporation's name. If they do, ask whether they will accept an ITIN or EIN instead. If the bank insists on a Social Security number, find a different bank. This is a sign they do not have a process for foreign corporations and may close the account later.

How long does it take to get approved?

Once you submit all documents, approval usually takes one to two weeks. Obtaining an EIN takes one day if you file online. An ITIN takes four to six weeks. The longest part of the process is usually gathering and translating your articles of incorporation if they are not in English. Plan for one to two months total if you are starting from scratch.