A domestic company is any corporation, LLC, partnership, or similar business entity formed under the laws of a US state or the District of Columbia. Under Internal Revenue Code Section 7701(a)(4), the label turns entirely on where the entity was created, not where it operates, keeps its headquarters, or earns its money.1Office of the Law Revision Counsel. 26 USC 7701 – Definitions That single formation event triggers US tax on worldwide income at a flat 21% corporate rate and a set of compliance obligations that follow the business for as long as it exists.
The Formation Test
The tax code defines “United States” for this purpose as the 50 states and the District of Columbia.2Office of the Law Revision Counsel. 26 USC 7701 – Definitions File articles of incorporation in Wyoming or organize an LLC in DC and you have a domestic entity. File under the laws of Canada, the UK, or the Cayman Islands and you do not, no matter how much of your business ends up happening in America.
People often assume “domestic” means “doing business here.” It doesn’t. A corporation can be headquartered in Tokyo, sell only in Europe, and employ nobody on US soil. If it was incorporated in Delaware, it is a domestic corporation for federal tax purposes. Run the mirror image: a company organized overseas with thousands of US employees and billions in US sales stays a foreign corporation. The IRS draws the line at the filing that created the entity.
This is why so many businesses pick their state of formation based on corporate governance rules, filing fees, or the reputation of a state’s courts rather than any physical tie to the state. Delaware is the familiar example. The choice affects internal governance, but every US state formation produces the same federal result: domestic status and everything that comes with it.
Which Entities Count
The domestic label applies across common business structures. Corporations, limited liability companies, general partnerships, limited partnerships, and statutory trusts are all domestic entities when formed under US state law. Corporations typically file articles or a certificate of incorporation, LLCs file articles of organization or a certificate of formation, and limited partnerships file a certificate of limited partnership.
Federal tax election is a separate question. A corporation that elects S corporation treatment passes income through to its shareholders’ personal returns but remains a domestic corporation. An LLC that elects to be taxed as a corporation files the same Form 1120 a traditional C corporation files.3Internal Revenue Service. Instructions for Form 1120 Domestic status is set at the state formation level; the tax election is a federal choice layered on top.
Worldwide Income and the 21% Rate
The largest consequence of domestic status is the worldwide income rule. A domestic corporation owes federal income tax on every dollar of taxable income no matter where in the world it originates. The rate is a flat 21% under Internal Revenue Code Section 11.4Office of the Law Revision Counsel. 26 USC 11 – Tax Imposed Profits from a factory in Ohio and profits from a subsidiary’s operations in Germany both land on the same return.
Every domestic corporation must file Form 1120 annually, whether or not it had taxable income. The return is generally due by the 15th day of the fourth month after the tax year ends (April 15 for calendar-year filers), with a six-month extension available.5Internal Revenue Service. Instructions for Form 1120 (2025)
How Foreign Companies Are Taxed Differently
The contrast with foreign companies is where the domestic definition earns its weight. A foreign corporation engaged in a US trade or business pays tax only on income effectively connected with that business, not on its worldwide earnings.6Office of the Law Revision Counsel. 26 USC 882 – Tax on Income of Foreign Corporations Connected With United States Business That effectively connected income is taxed at the same rates a domestic corporation would pay, but everything the foreign company earns outside the US stays outside the US tax net.7Internal Revenue Service. Effectively Connected Income (ECI)
For passive US-sourced income that is not connected with a US business, foreign corporations face a flat 30% withholding tax on dividends, interest, rents, and royalties from US sources. Treaties between the US and the foreign company’s home country often reduce that rate or eliminate it.8Office of the Law Revision Counsel. 26 USC 881 – Tax on Income of Foreign Corporations Not Connected With United States Business A domestic corporation never faces that withholding regime on its own income because it files a full return reporting everything.
The Foreign Tax Credit
Because domestic companies owe US tax on worldwide income, the same foreign profits can be taxed twice: once by the country where earned and again by the US. The foreign tax credit prevents that outcome. A domestic corporation that pays income taxes to a foreign government can claim a dollar-for-dollar credit against its US tax liability, subject to a limitation that keeps the credit from exceeding the US tax that would have been owed on that foreign income.9Internal Revenue Service. Instructions for Form 1118 (Rev. December 2025)
Corporations claim the credit on Form 1118.10Internal Revenue Service. About Form 1118, Foreign Tax Credit – Corporations Individual owners of pass-through entities that earn foreign income use Form 1116. For a globally operating domestic company, this credit is often the single biggest factor in how much additional US tax actually comes due.
GILTI Rate Changes in 2026
Domestic companies that own controlled foreign corporations face an extra layer of tax designed to discourage parking profits in low-tax countries. Under the Global Intangible Low-Taxed Income rules in IRC Section 951A, US shareholders of controlled foreign corporations must include the corporation’s GILTI in gross income each year, even when no cash is distributed back to the US.11eCFR. 26 CFR 1.951A-1 – General Provisions
For tax years beginning in 2026, the deduction domestic corporations can claim against their GILTI inclusion drops from 50% to 37.5%. That pushes the effective tax rate on GILTI from 10.5% up to 13.125%.12Internal Revenue Service. Concepts of Global Intangible Low-Taxed Income Under IRC 951A The rate increase was written into the 2017 tax law and takes effect automatically.
Corporate shareholders are also deemed to have paid 80% of the foreign income taxes their controlled foreign corporation paid on the income that generated the inclusion. Those deemed-paid taxes offset some of the US liability, but the GILTI foreign tax credit sits in its own basket, and unused credits in that basket cannot be carried forward or back. Any credit you don’t use in the year is permanently gone.12Internal Revenue Service. Concepts of Global Intangible Low-Taxed Income Under IRC 951A
Federal Domestic Is Not State Domestic
Federal domestic status does not give a company automatic permission to operate everywhere in the US. Each state treats entities formed elsewhere as “foreign” to that state, even though the entity is fully domestic under federal law. A corporation formed in Delaware that opens an office in California is a domestic corporation federally, a domestic corporation in Delaware, and a foreign corporation in California, all at once.
To legally do business in a state other than the one where it was formed, a company must register (often called qualifying) with that state’s business filing office. The process usually involves filing an application for a certificate of authority, designating a registered agent in the state, and paying filing fees that vary by state and entity type. Skip this step and most states will bar the unqualified company from using their courts to enforce contracts or file lawsuits, and many impose recurring civil fines.
Watch for State Tax Nexus
Qualification is the corporate-law side of crossing state lines. Tax nexus is a separate question. Since the Supreme Court’s 2018 decision in South Dakota v. Wayfair, states no longer need a company to be physically present before requiring it to collect sales tax. Most states apply an economic nexus threshold, commonly $100,000 in sales or 200 transactions within the state during a year, though the specific numbers and whether both tests apply vary.
For state income tax, Public Law 86-272 protects companies whose only in-state activity is soliciting orders for tangible goods, provided orders are approved and shipped from outside the state. Several states have taken the position that common digital activities such as placing cookies on visitors’ browsers or providing online chatbot support go beyond solicitation and strip away that protection. Any domestic company selling across state lines needs to track where it has nexus.
Staying in Good Standing
Forming a domestic entity is not a one-time event. Every state requires ongoing compliance to keep the entity in active, good-standing status. The specific obligations vary but generally include some combination of annual or biennial report filings, franchise tax payments, and maintenance of a registered agent with a physical address in the state of formation. Annual report fees across states typically range from about $25 to $150, though states with franchise taxes based on authorized shares or revenue can charge much more.
A domestic company that misses these requirements faces administrative dissolution or revocation of its charter. A dissolved entity generally cannot conduct normal business or file lawsuits, and people who continue acting on its behalf may be held personally liable for debts incurred while the entity was dissolved. In some cases the entity’s name becomes available and another business can claim it during the period of dissolution.
Beneficial Ownership Reporting No Longer Applies
The Corporate Transparency Act originally required most small domestic companies to file Beneficial Ownership Information reports with the Financial Crimes Enforcement Network (FinCEN). That requirement no longer applies to domestic entities. An interim final rule published on March 26, 2025, exempted all entities created in the United States from BOI reporting.13Federal Register. Beneficial Ownership Information Reporting Requirement Revision and Deadline Extension FinCEN revised the definition of “reporting company” to cover only entities formed under foreign law that have registered to do business in a US state.14FinCEN. Beneficial Ownership Information Reporting
Domestic companies do not need to file initial BOI reports, update prior filings, or correct old ones. FinCEN has said it intends to issue a final rule confirming the exemption, but as of early 2026 the interim rule is in effect and no domestic filing obligation exists.13Federal Register. Beneficial Ownership Information Reporting Requirement Revision and Deadline Extension