A subsidiary is a company that another company, called the parent or holding company, controls through majority ownership. Owning more than 50% of a subsidiary's voting shares gives the parent the power to elect its board of directors and direct its operations. A subsidiary that is 100% owned by a parent is called a wholly owned subsidiary. Despite this control relationship, a subsidiary is a legally separate entity with its own balance sheet, tax filings, and liability exposure.
Think of a subsidiary like a franchise location: it carries the parent company's influence but operates as its own legal unit.
The most common reason is liability isolation. Because a subsidiary is legally distinct from its parent, losses or lawsuits at the subsidiary level generally do not automatically reach the parent's assets. If a chemical manufacturing subsidiary faces an environmental lawsuit, that claim attaches to the subsidiary's assets, not the parent's headquarters or other business units.
Companies also use subsidiaries to enter foreign markets without restructuring the parent. A U.S. company can establish a German subsidiary that complies with German employment law, pays German taxes, and operates under German corporate governance requirements, all without changing the parent's structure.
Tax optimization is another driver. A subsidiary in a jurisdiction with lower corporate tax rates can legitimately retain profits there, reducing the group's overall tax burden. Transfer pricing rules govern how companies manage this, but the flexibility remains a real advantage.
When a parent owns more than 50% of a subsidiary, accounting rules under U.S. generally accepted accounting principles require the parent to prepare consolidated financial statements. These combine the assets, liabilities, revenues, and expenses of both entities line by line, as though they were a single company. The portion of the subsidiary not owned by the parent, called the noncontrolling interest or minority interest, is separately disclosed in the consolidated balance sheet.
Intercompany transactions, such as a loan from parent to subsidiary, are eliminated in consolidation to prevent double counting.
A branch is not a separate legal entity. It is an extension of the parent company operating in another location. All liabilities at the branch level are the parent's liabilities directly. A subsidiary is different: it has its own legal identity, and the parent's liability for the subsidiary's obligations is generally limited to the value of the ownership stake.
An associate company is one where the parent holds a significant but non-controlling interest, typically between 20% and 50% of voting shares. Associates are accounted for under the equity method rather than full consolidation.
Sources: