Foreign-Owned US Businesses: Tax Rules for ECI, FIRPTA, Branch Profits Tax, and Treaty Benefits

By Yarik Yarosh, CPA ·September 5, 2026 ·7 min read

Written by Yarik Yarosh, CPA (US & Canada) September 5, 2026 · FL CPA license AC61704 · CPA Ontario

Foreign ownership of a US business triggers a web of tax rules that domestic owners never encounter. The starting point is IRC 871 (for individuals) and IRC 882 (for corporations): a foreign person engaged in a US trade or business is taxed on effectively connected income (ECI) at the same graduated rates as a US person, with a filing obligation (Form 1040-NR or 1120-F). Income that is not effectively connected (FDAP, which includes passive income like dividends, interest, rents, and royalties) is subject to a flat 30% withholding tax at the source, with no deductions allowed. This creates a two-track system where the same foreign person may owe graduated tax on business profits and flat-rate withholding on investment income. Beyond this basic framework, foreign-owned US businesses must navigate FIRPTA withholding on real property sales, the branch profits tax on foreign corporations operating through a US branch, transfer pricing rules (IRC 482) on transactions with related foreign parties, the annual reporting requirements (Form 5472 for foreign-owned US corporations, with a $25,000 penalty per failure), and the potential benefits of income tax treaties between the US and the foreign person’s home country.

✓Key takeaway

US tax framework for foreign-owned businesses:

Income Type	Tax Treatment	Rate	Form
Effectively Connected Income (ECI)	Net basis (income minus deductions)	Graduated (10-37% individual; 21% corporate)	1040-NR (individual) / 1120-F (corporation)
FDAP (dividends, interest, rents, royalties)	Gross basis (no deductions)	30% withholding (reduced by treaty)	1042-S (payer reports), 1040-NR
US real property gain (FIRPTA)	Treated as ECI	15% withholding at closing; then taxed at graduated rates	8288/8288-A (withholding); 1040-NR/1120-F (return)
Branch profits tax (foreign corporations)	Tax on deemed repatriation of branch earnings	30% (reduced by treaty)	1120-F, Schedule H

Key reporting obligations:

Form	Who Files	Penalty for Failure
Form 5472 (foreign-owned US corporation)	US corporation with 25%+ foreign ownership	$25,000 per form, per year
Form 1120-F (foreign corporation)	Foreign corporation with US trade or business	Standard failure-to-file penalties
Form 1040-NR (nonresident alien)	Foreign individual with US income	Standard failure-to-file penalties
Form 8833 (treaty-based position)	Any taxpayer claiming treaty benefits to reduce US tax	$1,000-$10,000 penalty for failure

How are foreign-owned US businesses taxed?

Hypothetical example

Round numbers. A Canadian corporation owns a US subsidiary (a US C-Corp) that operates a consulting business. The US subsidiary earns $1,000,000 in net income and pays a $200,000 dividend to the Canadian parent.

Scenario 1: US subsidiary (C-Corp)

Item	Amount
US subsidiary net income	$1,000,000
US corporate tax (21%)	$210,000
After-tax earnings	$790,000
Dividend to Canadian parent	$200,000
US withholding on dividend (30% default)	$60,000
US withholding on dividend (US-Canada treaty: 5% for 10%+ ownership)	$10,000
Total US tax (corporate + withholding with treaty)	$220,000
Canadian tax on the dividend (foreign accrual property income rules, with foreign tax credit)	Varies

Scenario 2: US branch (no subsidiary)

Item	Amount
US branch net income	$1,000,000
US corporate tax on ECI (21%)	$210,000
Branch profits tax (30% x deemed repatriation)
Dividend equivalent amount (DEA)	$790,000 (after-tax earnings not reinvested in US assets)
Branch profits tax (30% x $790,000)	$237,000
Branch profits tax (US-Canada treaty: 5%)	$39,500
Total US tax (corporate + BPT with treaty)	$250,500

The branch profits tax makes operating as a US branch generally more expensive than using a US subsidiary, especially when the foreign corporation repatriates all earnings.

FIRPTA withholding example: A foreign individual sells a US commercial property for $2,000,000 with an adjusted basis of $800,000.

Item	Amount
Sale price	$2,000,000
FIRPTA withholding at closing (15% of sale price)	$300,000
Actual capital gain	$1,200,000
Depreciation recapture (assume $200,000)	$200,000 at 25% = $50,000
Capital gain tax ($1,000,000 x 23.8%)	$238,000
Total actual tax	$288,000
FIRPTA withholding exceeds actual tax	$300,000 - $288,000 = $12,000 refund

The foreign seller must file a 1040-NR to claim the $12,000 refund. If the seller does not file, the $300,000 withholding is the final tax (no refund).

Withholding certificate (Form 8288-B): The seller can apply for a reduced withholding amount before closing if the actual tax will be less than 15% of the sale price.

Transfer pricing (IRC 482): Foreign-owned US businesses transacting with related foreign parties must price transactions at arm’s length.

Transaction	Transfer Pricing Risk
Management fees paid to foreign parent	Must be at arm’s length; excessive fees reduce US taxable income
Loans from foreign parent	Interest rate must be at arm’s length (AFR minimum); thin capitalization rules may limit interest deduction
Royalties paid to foreign parent for IP	Must reflect arm’s length value of the IP
Cost-sharing arrangements	Must comply with IRC 482 cost-sharing regulations
Intercompany product pricing	Must use comparable uncontrolled price, resale price, cost-plus, or other approved methods

Penalty for non-compliance:

Violation	Penalty
Underpayment due to transfer pricing adjustment > $5 million or 10% of gross receipts	20% penalty (IRC 6662(e))
Underpayment due to transfer pricing adjustment > $20 million or 20% of gross receipts	40% penalty (IRC 6662(h))
Failure to maintain contemporaneous documentation	20% penalty cannot be avoided (no reasonable cause defense)

Structure comparison for foreign investment in US business:

Structure	US Tax	Advantages	Disadvantages
US C-Corp subsidiary	21% corporate tax + 5-30% withholding on dividends	Limited liability; treaty benefits on dividends; no branch profits tax	Double taxation (corporate + withholding)
US branch (no entity)	Graduated tax on ECI + 30% branch profits tax	No separate entity formation; direct offset of losses against foreign income	Branch profits tax; unlimited liability
US LLC (disregarded)	Pass-through to foreign owner; ECI taxed at graduated rates	Simplicity; no entity-level tax	Foreign owner must file US return; may not get treaty benefits
US LLC (electing corporate treatment)	Same as C-Corp subsidiary	Flexibility; treaty benefits	Double taxation
US LP (limited partnership)	Pass-through; withholding on foreign partner’s ECI	Can limit liability as LP; pass-through of losses	Complex withholding rules (IRC 1446); publicly traded partnership rules

Treaty benefits (US-Canada example):

Income Type	Without Treaty	With US-Canada Treaty
Business profits (without PE)	Taxed if trade or business	Exempt (no permanent establishment)
Dividends (10%+ ownership)	30% withholding	5% withholding
Dividends (under 10% ownership)	30% withholding	15% withholding
Interest	30% withholding	0% withholding (most types)
Royalties	30% withholding	0-10% withholding (depending on type)
Capital gains (non-real property)	Taxed if ECI	Exempt (generally taxed only in residence country)
Real property gains (FIRPTA)	15% withholding, then graduated rates	Not overridden by treaty (FIRPTA applies regardless)
Branch profits tax	30%	5%

Illustrative numbers only, not a real client and not advice for your facts.

Related guides:

Selling a Cross-Border STR: The Exit Checklist
Canadian Buying US Property: The Complete Tax Picture
Form 8288: FIRPTA Withholding on US Real Property Sales

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Cite this page

Yarik Yarosh, CPA. "Foreign-Owned US Businesses: Tax Rules for ECI, FIRPTA, Branch Profits Tax, and Treaty Benefits." Blue Cloud CPA, September 5, 2026. https://bluecloudcpa.com/guides/small-business-foreign-owned-us-business-tax-eci-firpta-branch-profits

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.