The US Federal Tax System: A Quick Guide for Foreign Business Owners
A plain-English overview of US federal taxes for non-resident business owners: entity types, how non-residents are taxed, withholding, payroll taxes, information returns and state taxes.
From abroad, the US tax system can look like a maze of form numbers. But for a foreign-owned company, it comes down to a handful of ideas: who is taxing, what kind of entity you have, what kind of income it earns, and what must be reported even when no tax is due.
This guide gives you the map. The linked articles go deeper on each part.
Three levels of government
- Federal (the IRS): income tax, payroll taxes, withholding on payments to foreigners, and information reporting. The same rules apply in every state.
- States: annual company fees and franchise taxes, state income or business taxes, and sales taxes. Rules differ widely.
- Local governments: some cities and counties add their own sales taxes, business licences or income taxes.
Choosing Wyoming or Delaware affects your state costs. It does not change your federal obligations. See state taxes for foreign-owned LLCs.
How each entity type is taxed federally
| Entity | Default federal treatment | Main annual federal filing |
|---|---|---|
| Single-member LLC | Disregarded: income belongs to the owner | Form 5472 + pro forma 1120 if foreign-owned |
| Multi-member LLC | Partnership: income passes through to partners | Form 1065 + partner statements |
| C-Corporation | Separate taxpayer: 21% on profits | Form 1120 (+ Form 5472 if 25%+ foreign-owned) |
An LLC can elect to be taxed as a corporation. Non-residents cannot use S-Corporation status. See LLC or Inc for non-residents.
How non-residents are taxed
The USA taxes non-resident individuals and foreign companies on two categories of US income:
1. Effectively connected income (ECI)
Income from a US trade or business, such as profits from operations with a US office, staff or dependent agents. It is taxed on net profit at the normal graduated individual rates (or 21% for corporations), and requires a filed return. See effectively connected income explained.
2. Fixed or passive US-source income (FDAP)
Dividends, interest, royalties and rents from US sources. It is generally taxed at a flat 30% on the gross amount, withheld by the payer, often reduced by a tax treaty. See FDAP and 30% withholding.
Income from services you perform outside the USA is generally foreign-source and not taxed by the USA at all, which is why many LLCs run from abroad owe little or no federal income tax.
Corporations: the double layer
A C-Corporation pays 21% federal corporate tax on its profits, wherever the work is done. When it pays dividends to a foreign shareholder, a further 30% (or treaty rate) is withheld. Profits reinvested in the business are not subject to the second layer. See the 21% corporate tax explained.
Tax treaties
The USA has income tax treaties with many countries, including India, the UK, Canada and most of Europe. Treaties can limit US tax on business profits to cases where you have a permanent establishment, and reduce withholding on dividends, interest and royalties. Some popular founder bases, such as the UAE, have no treaty. See US tax treaties.
Payroll taxes
If your company employs people in the USA, it must withhold federal income tax from wages and pay Social Security and Medicare taxes, plus federal and state unemployment taxes. Contractors and staff working outside the USA are handled differently. See hiring in the USA as a non-resident company.
Information returns: where most penalties come from
Even when no tax is due, the IRS requires reports, especially for foreign-owned companies:
- Form 5472 for foreign-owned LLCs and corporations ($25,000 penalty if missed). See Form 5472 explained.
- 1099 forms for payments to US contractors. See 1099 thresholds 2026.
- FBAR if the company has foreign accounts above $10,000. See FBAR for US companies.
For non-resident owners, these reporting rules cause far more problems than income tax itself.
Key dates
For calendar-year companies: partnerships by March 15, corporations and foreign-owned LLCs by April 15, non-resident personal returns without wages by June 15, with extensions available. See the 2027 deadline calendar.
The bottom line
Your US tax position depends on three choices: the entity type, where the work is done, and how money moves between you and the company. Getting these right at the start, and filing the required reports every year, is what keeps a foreign-owned company safe.
How UCB helps
We help you choose the right structure before you form, then handle your annual federal filings through our US tax filing service, with reminders for every deadline.
Want a quick review of how your US company should be taxed? WhatsApp us at +91 8105 199 399 or email info@ucbsolutions.com.
Let our experts handle it for you
Every business is different. Message us with your country, business type and goals, and we will recommend the right structure, state and package. We do the work; you focus on your business.
This article is general information for non-resident business owners and is not legal or tax advice. Rules and fees change; contact us to confirm what applies to your situation.
