What Is a Corporation? Definition & Key Concepts

A corporation is a legal entity formed under state law that exists separately from its owners. That separation gives shareholders limited liability protection and allows the business to own property, enter contracts, and continue operating regardless of leadership changes. This article covers the core definition and what employers need to know about operating as a corporation.

What Is a Corporation?

A corporation is a business entity formed under state law that has a legal identity separate from its owners. That separation is what gives corporations their defining characteristics:

• Owned by shareholders, governed by a board of directors, and operated by officers (CEO, CFO, and similar roles)
• Can own property, enter contracts, and sue or be sued in its own name
• Limited liability is when a shareholders' personal assets are generally protected from business debts and legal claims

To maintain that liability protection, corporations must follow ongoing requirements, including holding annual meetings, keeping accurate records, and filing required state documents. Commingling personal and business funds or ignoring these formalities can expose owners to personal liability in a process courts call "piercing the corporate veil."

C Corp vs. S Corp: Key Differences at a Glance

The two most common corporation types are C corps and S corps. The primary difference is taxation: C corporations are taxed at the entity level, while S corporations pass profits and losses directly to shareholders' personal returns.

The "Best for" guidance above is general in nature. Consult a tax advisor to determine the right structure for your business.

Other corporation types worth knowing: nonprofit organizations (organized for charitable or public purposes) and professional corporations (PCs), used by licensed professionals such as doctors, attorneys, and accountants.

What Employers Need To Know About Operating as a Corporation

Choosing to operate as a corporation carries specific payroll, tax, and compliance obligations that differ from other business structures.

• EIN Requirement: Corporations must obtain a federal Employer Identification Number (EIN) before hiring or opening a business bank account.
• Payroll Obligations: All corporations (including owner-employees) must run payroll and withhold employment taxes. Owners cannot simply take draws the way a sole proprietor might.
• Reasonable Compensation: S corp owner-employees are required by the IRS to pay themselves a reasonable salary before taking distributions. Paying an artificially low salary to minimize payroll taxes is a common audit trigger.
• Benefits Administration: Health insurance deductibility differs between C and S corps. C corp owner-employees can generally deduct premiums as a business expense; S corp shareholders who own more than 2% have different rules.
• Corporate Formalities: Failing to maintain meeting minutes, annual filings, and separation between personal and business finances can void the liability protection the corporate structure provides — putting owners' personal assets at risk. These are not optional housekeeping tasks; they are what keeps the structure intact.

How Paychex Can Help

Running payroll is extremely important for a corporation, where compliance requirements are higher and the IRS scrutinizes owner compensation more closely. Paychex offers payroll solutions built to handle corporate structures, including officer compensation and employment tax withholding.