A foreign-owned U.S. subsidiary usually has five sets of obligations: federal income tax returns (Form 1120 for a corporation), related-party reporting on Form 5472, state and local taxes, payroll filings once it has employees, and accounting records that support both its U.S. returns and reporting to the parent. Which rules apply depends on the entity’s tax classification, where it operates and what it does with its parent.
Last reviewed: October 2026
Key takeaways
- Confirm the entity’s federal tax classification first: a C-corporation, a single-member LLC and a foreign company’s U.S. branch file different returns.
- A domestic corporation generally files Form 1120 every year, even without taxable income. The federal rate is 21%; state taxes are separate.
- Form 5472 covers reportable related-party transactions of corporations that are at least 25% foreign-owned and of foreign-owned single-member LLCs. The standard penalty for not filing is $25,000.
- Incorporating in Delaware doesn’t limit obligations to Delaware: employees, sales and property in other states can create registrations and taxes there.
- Price intercompany charges at arm’s length, document them as they happen, and send the parent a monthly reporting package.
- Since August 14, 2026, entities created in the U.S. are exempt from FinCEN BOI reporting. IRS filings are unaffected.
Your U.S. subsidiary has been incorporated. It has an Employer Identification Number (EIN), a bank account and perhaps its first employees.
What happens next?
A foreign-owned U.S. business may have federal tax returns, state obligations, accounting requirements, related-party reporting and employer filings to manage. Exactly which rules apply depends on the entity’s tax classification, ownership, transactions and activities.
There isn’t a single compliance checklist that applies to every subsidiary.
But there is a structured way to work out what your business needs.
1. Start with the entity’s U.S. tax classification
The name of the entity doesn’t tell you everything about its tax treatment.
A U.S. corporation is generally treated as a separate corporate taxpayer for federal income-tax purposes. A limited liability company (LLC), however, may be classified as a disregarded entity, partnership or corporation, depending on ownership and applicable elections.
A foreign company operating directly in the United States through a branch is another distinct situation.
| Structure | Typical federal tax treatment | Main filing question |
|---|---|---|
| U.S. C-Corporation | Separate domestic corporate taxpayer | Does it need to file Form 1120 and additional information returns? |
| Single-member LLC without a corporate tax election | Generally disregarded for federal income-tax purposes | What obligations apply to its owner, and is Form 5472 required? |
| Multi-member LLC classified as a partnership | Generally treated as a partnership | Are Form 1065 and partner-related obligations applicable? |
| Foreign corporation operating directly in the U.S. | Foreign corporation potentially subject to U.S. taxation on effectively connected income | Is Form 1120-F required, including where treaty claims apply? |
The distinctions matter.
For example, the IRS may require a foreign-owned U.S. disregarded entity to submit Form 5472 with a pro forma Form 1120. That is not the same as treating the entity as an ordinary U.S. corporate income-tax filer.
Start by confirming the actual federal tax classification, not just the legal name on the formation documents.
Source: IRS, Single-member limited liability companies.
2. Which federal tax returns does a U.S. subsidiary file?
Form 1120: domestic corporations
Domestic C-Corporations generally use Form 1120 to report federal corporate income, deductions, credits and tax liability.
The standard federal corporate income-tax rate is 21%, but actual liability depends on taxable income, available deductions, applicable credits and other provisions. State corporate taxes are separate.
A domestic corporation generally must file Form 1120 even if it has no taxable income, unless an exception applies.
The usual filing deadline is the 15th day of the fourth month after the end of the tax year, subject to specific exceptions and calendar adjustments. An extension may provide more time to file, but not necessarily more time to pay.
Source: IRS, Instructions for Form 1120.
Form 1120-F: foreign corporations
Form 1120-F is different. It is used by foreign corporations with specified U.S. filing obligations.
A foreign corporation conducting a U.S. trade or business may be required to file, including in situations where it claims treaty protection. Whether its income is taxable and whether a filing is required are related but separate questions.
Having U.S. employees can be relevant to determining whether a foreign corporation conducts a U.S. trade or business. The conclusion depends on the activities performed and other circumstances.
Source: IRS, Foreign corporation Form 1120-F filing responsibilities.
What about LLCs?
LLC treatment requires a separate analysis.
For example, the activities of a disregarded LLC generally flow through to its owner for federal income-tax purposes, while the LLC can still be treated separately for employment taxes and certain information-reporting obligations.
This is one reason a foreign-owned LLC should never be assumed to have the same filing obligations as a foreign-owned C-Corporation.
Explore: Corporate tax.
3. Form 5472: the reporting obligation foreign-owned companies should not overlook
Form 5472 is particularly important for international groups.
It is an information return used by certain reporting corporations to disclose reportable transactions with related parties.
The rules can apply to:
- U.S. corporations that are at least 25% foreign-owned and have reportable related-party transactions;
- certain foreign corporations engaged in a U.S. trade or business;
- wholly foreign-owned U.S. disregarded entities with reportable transactions.
Depending on the structure, reportable transactions can include sales, services, rents, royalties, interest, loans or other transactions involving related parties.
For certain foreign-owned disregarded entities, contributions, distributions and other transactions can also be relevant.
Foreign ownership alone does not mean every corporation automatically files a Form 5472 every year. The reporting corporation’s transactions and applicable exceptions must be reviewed.
The IRS states that the standard penalty for failure to file a required, complete and accurate Form 5472 is $25,000. Additional penalties can arise when a failure continues after IRS notification.
This is why intercompany transactions should be tracked throughout the year rather than reconstructed just before filing.
Source: IRS, Instructions for Form 5472.
4. Which state and local taxes apply?
A U.S. entity’s tax responsibilities are not limited to the IRS.
Depending on the states where it operates, it may face:
- corporate income taxes;
- franchise taxes or other business-level taxes;
- state registrations and annual reports;
- employer withholding and unemployment taxes;
- sales and use taxes;
- local taxes or business licensing requirements.
Incorporating in Delaware does not automatically eliminate obligations elsewhere.
For example, a Delaware corporation employing staff in another state may need to evaluate employer registration, business qualification and state tax nexus in that state.
These are separate questions. Registering for payroll does not necessarily complete every corporate or sales-tax registration that might apply.
Source: SBA, Launch your business.
5. Sales tax: a separate compliance analysis
Sales tax and corporate income tax do not follow the same rules.
A foreign-owned U.S. company may have sales-tax obligations based on physical presence, economic activity or other state-specific criteria.
The tax treatment can also depend on what the company sells. Physical products, SaaS subscriptions and services are not taxed identically across states.
A company might therefore have to register and collect sales tax in a state even where it does not owe that state’s corporate income tax, or vice versa, depending on the facts and the applicable law.
The important point is to assess sales-tax nexus and product taxability independently.
Explore: Sales tax. Related reading: is SaaS taxable in the U.S.?
6. What payroll filings apply when the subsidiary hires?
A subsidiary with employees needs to manage payroll and employment compliance alongside its corporate filings.
Depending on its circumstances, federal obligations can include:
- withholding federal income tax from wages;
- withholding and paying Social Security and Medicare taxes;
- paying federal unemployment tax where applicable;
- filing quarterly or other applicable employment-tax returns;
- issuing Forms W-2 and meeting year-end reporting requirements.
States and localities can impose additional payroll taxes, registrations, wage rules, reporting obligations and insurance requirements.
When a subsidiary hires its first employee in another state, it should review the requirements before payroll begins.
Source: IRS, Understanding employment taxes. Related guide: does hiring one U.S. employee create tax or payroll obligations?
7. What accounting records should the subsidiary maintain?
Reliable accounting is the foundation of reliable tax filings.
Depending on the business, records should cover:
- revenue, invoices and accounts receivable;
- supplier expenses and accounts payable;
- bank and credit-card reconciliations;
- payroll and employee-related expenses;
- fixed assets and depreciation;
- inventory, where applicable;
- sales-tax transactions and liabilities;
- intercompany balances and transactions;
- accruals, adjustments and supporting documentation.
A monthly close can help catch problems early.
For example, if the subsidiary records management fees from its parent without supporting invoices or a consistent accounting policy, that can create complications for financial reporting, transfer pricing and information returns.
The objective isn’t to maintain the largest possible set of records. It’s to maintain accurate, supportable information that serves both U.S. compliance and business decisions.
Explore: Accounting.
8. How should intercompany charges, loans and transfer pricing be documented?
Many international subsidiaries rely on their parent companies.
A European headquarters may provide management support, software development, intellectual property, financing or administrative services to its U.S. entity.
Those transactions should be properly characterized, priced, invoiced and recorded.
Under U.S. transfer-pricing rules, controlled transactions are generally evaluated against the arm’s-length standard. That means their results should be consistent with comparable arrangements between independent parties under comparable circumstances.
Intercompany transactions can also raise withholding-tax and treaty questions.
A finance team should be able to explain:
- what service, right or financing arrangement is involved;
- which entity provides and receives it;
- how the amount was calculated;
- how the transaction was recorded in each entity;
- what documentation supports it;
- whether it triggers additional reporting or withholding.
Source: IRS, Allocation of income and deductions under IRC 482.
9. What should the U.S. subsidiary report to its European parent?
The American entity may have its own statutory and tax requirements, but the group’s finance team needs a consolidated view of operations.
A practical monthly reporting package might include:
| Information | Why the parent needs it |
|---|---|
| Income statement | Revenue, expenses and profitability |
| Balance sheet | Assets, liabilities and equity |
| Cash position | Liquidity, funding needs and cash forecasts |
| Budget versus actuals | Operational performance and deviations |
| Intercompany balances | Reconciliation between group entities |
| Tax and compliance status | Upcoming obligations, risks and required actions |
| Management commentary | Explanation of material developments |
Where the parent uses French accounting standards, Spanish accounting standards or IFRS, adjustments or account mappings may be necessary to support consolidation.
The reporting package should be tailored to the group’s needs rather than simply forwarding an unadjusted U.S. accounting-system export.
Explore: Custom reporting.
10. Beneficial ownership reporting: an important 2026 distinction
Beneficial ownership information (BOI) reporting and foreign-ownership tax reporting are not the same thing.
FinCEN’s final rule, effective August 14, 2026, exempts entities created in the United States from federal BOI reporting requirements. Certain foreign entities registered to do business in the United States remain subject to a narrower reporting regime.
That exemption does not remove unrelated IRS filing obligations, such as Form 5472 when applicable.
Be cautious with older checklists telling every newly incorporated U.S. company to file a FinCEN BOI report.
Source: FinCEN, final BOI rule. Related reading: BOI reporting in 2026.
11. Build a recurring compliance calendar
A useful compliance calendar identifies the obligation, the relevant entity, the jurisdiction, the due date and the person responsible.
| Frequency | Items to review |
|---|---|
| Monthly | Bookkeeping, reconciliations, payroll processing, sales-tax filings where required, parent reporting |
| Quarterly | Applicable payroll returns, estimated tax payments, certain state filings and financial review |
| Annually | Corporate income-tax returns, Form 5472 where applicable, state annual reports, year-end wage reporting |
| When circumstances change | New states, employees, financing, ownership changes, new product lines, intercompany arrangements |
This is a planning framework, not a universal filing timetable. Actual obligations and deadlines depend on the entity, tax year, state, registrations and facts.
For federal corporate income-tax returns, confirm the applicable due date and any extension using the current IRS instructions. An extension to file does not automatically extend the deadline to pay tax.
Frequently asked questions
Does every foreign-owned U.S. company file Form 1120?
No. A domestic corporation generally files Form 1120, but LLCs and foreign corporations can have different federal tax classifications and filing requirements.
Is Form 5472 required simply because a company is foreign-owned?
Not automatically for every company. The reporting-corporation rules, reportable transactions and applicable exceptions must be reviewed. Wholly foreign-owned disregarded entities have special reporting rules.
Does a Delaware subsidiary only pay Delaware taxes?
Not necessarily. Activities, employees, sales and other connections to additional states may create obligations elsewhere.
Does a U.S.-created company have to report beneficial ownership to FinCEN in 2026?
Under the final rule effective August 14, 2026, U.S.-created entities are exempt from federal BOI reporting. This does not eliminate IRS ownership-related information returns.
Does a U.S. subsidiary need separate financial statements?
It needs accurate records sufficient for applicable tax and reporting obligations. Whether separate financial statements under a particular accounting framework are required depends on the entity’s circumstances, contractual obligations, lenders, investors and group reporting arrangements.
What tax and accounting obligations does a new foreign-owned U.S. subsidiary have?
Administrative: an EIN, a bank account, a registered agent, the state annual report and registrations in each state where it operates. Tax: a federal return (Form 1120 for a C-corporation), Form 5472 if it has reportable transactions with foreign related parties, state taxes and sales tax where applicable. Payroll: withholding, unemployment insurance, workers’ compensation and quarterly Form 941 filings once it has employees. Accounting: a monthly close and the reporting package its parent needs.
How should a foreign parent document intercompany charges and loans with its U.S. subsidiary?
Put each flow (services, royalties, loans, cost recharges) in a written intercompany agreement, price it at arm’s length consistent with IRC section 482, invoice it, and record it the same way in both entities. Loans should carry an interest rate and repayment terms. Keep the calculation and supporting documents: the same transactions feed Form 5472 and can trigger U.S. withholding tax.
What payroll and state registrations apply when a foreign-owned subsidiary hires in several states?
In each state where an employee works, the subsidiary generally needs a state withholding account (where the state has an income tax), a state unemployment insurance account and workers’ compensation coverage, and it may need to register to do business there. A new state can also create corporate income or franchise tax nexus. Federally, it withholds income tax and FICA, pays FUTA, files Form 941 quarterly and issues Forms W-2.
Why is U.S. tax compliance harder for foreign-owned companies?
Obligations sit at three levels (federal, state and local) with no single registration, related-party transactions carry their own reporting (Form 5472) and transfer-pricing rules, and U.S. tax years, forms and deadlines rarely line up with the parent’s. Most problems come from tracking intercompany transactions and new-state activity too late.
The bottom line
A foreign-owned U.S. subsidiary needs more than an annual tax return.
Its compliance framework should reflect its legal structure, federal tax classification, state activities, employees, related-party transactions and the reporting needs of its international parent.
The most reliable approach is to coordinate accounting, tax, payroll and intercompany reporting from the beginning, with clear responsibilities and a recurring review process.
Orbiss helps international companies maintain that financial and tax infrastructure as their U.S. operations grow.
Discuss your U.S. subsidiary’s tax and accounting requirements with Orbiss.
Read more: U.S. expansion services: what international companies need · U.S. subsidiary setup checklist · EOR vs. U.S. subsidiary
This article is for general informational purposes only and does not constitute legal, tax, or accounting advice. Rules and requirements vary by company, individual, and jurisdiction, and can change. Please seek advice appropriate to your specific situation.