Tax Legal Services · Primary-source case analysis

National Carbide: Corporate Control Does Not Automatically Make a Subsidiary the Parent’s Tax Agent

By Aneeta Mishra and Timothy Chan

Published September 10, 2026

A parent corporation organized subsidiaries, owned their stock, controlled their operations, and received profits under agency agreements. The subsidiaries argued that the income belonged directly to the parent because they acted only as agents.

Incorporation generally creates a separate taxpayer

A corporation carrying on business activity is ordinarily taxed on its income even when one shareholder owns and controls it. Control and consolidated economic purpose do not alone erase separate entity status.

A genuine agency requires more than ownership

An agency relationship must rest on the corporation acting for its principal rather than simply conducting its own business under a label chosen by related parties.

Ownership cannot be the source of agency authority

The purported agent's relations with the principal must not be dependent solely on stock ownership, and the entity's business purpose and dealings must be consistent with a true agency relationship.

The subsidiaries earned the income

They held assets, entered contracts, and produced income in their own names. The contractual obligation to remit profits to the parent did not shift the incidence of tax.

Key takeaways

• Document the business reason and legal role of each related entity.
• Do not rely on an agency label unsupported by actual conduct.
• Trace who owns assets, signs contracts, bears risk, and earns income.
• Evaluate tax consequences before using profit-remittance arrangements.