Company law is the body of rules that governs how a business comes into existence, how it operates, how it raises money, and how it eventually shuts down. In the United States, most of those rules live in state statutes rather than a single federal code, so the details depend on where the company is incorporated. The framework matters because it creates the legal separation between a business and its owners, defines who owes what to whom inside the company, and sets the ground rules for everything from issuing stock to closing the doors. Getting the basics wrong can cost you liability protection, trigger penalties, or invite lawsuits you could have avoided.
Why Company Law Is State Law
Other countries run their businesses under a single national companies act. The United States doesn’t. Every state has its own business entity statutes covering formation, governance, fiduciary duties, and dissolution. Federal law layers on top for securities regulation, tax, and anti-fraud enforcement, but the core architecture of a company is a creature of whatever state you file in.
This is why Delaware looms so large. More than two-thirds of Fortune 500 companies are incorporated there, not because they operate in Delaware, but because the state offers a well-developed body of case law, a specialized business court (the Court of Chancery), and a legislature that updates its corporate statute regularly. Many other states model their own laws on Delaware’s General Corporation Law or on the Model Business Corporation Act, a template published by the American Bar Association.
You don’t have to incorporate where you operate. It’s standard to form the entity in one state and register as a “foreign” entity in each additional state where you do business. Each of those registrations brings its own filing fees, registered agent requirement, and annual report obligation.
The Main Business Structures
Company law doesn’t treat all businesses the same. The structure you choose determines your tax treatment, your personal exposure to the company’s debts, and how much regulatory overhead you’ll carry. Three forms dominate.
A C-corporation is the default corporate form. It is its own taxpayer, paying the federal corporate income tax on profits. When those after-tax profits are distributed to shareholders as dividends, shareholders pay tax again on the distribution. This double taxation is the trade-off for features like unlimited shareholders, multiple classes of stock, and the ability to go public.
An S-corporation is a corporation that has elected pass-through tax treatment under Subchapter S of the Internal Revenue Code. Profits and losses flow through to the shareholders’ personal returns, avoiding the corporate-level tax. The eligibility rules are strict: no more than 100 shareholders, only one class of stock, and shareholders must be U.S. citizens, resident individuals, or certain trusts and tax-exempt organizations.
A limited liability company (LLC) is a hybrid. It offers liability protection similar to a corporation but with more flexibility in management and taxation. By default, a single-member LLC is taxed as a sole proprietorship and a multi-member LLC as a partnership, though an LLC can elect to be taxed as a corporation. LLCs have no cap on the number of owners and no restrictions on who can be a member.
The right choice depends on your plans. If you expect outside investors or an eventual public offering, a C-corp is the standard vehicle. If you’re running a closely held business with a handful of owners who want pass-through taxation, an S-corp or LLC usually makes more sense. You can change entity type later, but restructuring mid-stream is expensive and sometimes triggers tax consequences.
How a Company Is Formed
Creating a company means filing formation documents with the secretary of state (or equivalent office) in the state you choose. For a corporation, those documents are called articles of incorporation. For an LLC, they’re typically called articles of organization. Filing fees vary widely by state, generally ranging from about $50 to $300.
Articles of incorporation usually require the company’s name, the name and address of a registered agent, a statement of purpose, the number of shares the company is authorized to issue, and the names of the initial directors or incorporators. Most of this is straightforward, but getting the authorized share count and par value wrong can create headaches when you try to bring on investors later.
After filing, a corporation adopts bylaws, which are the internal rulebook for how the company operates. Bylaws cover meeting procedures, voting rules, how officers are appointed, and how stock transfers work. Most states require corporations to have bylaws and to make them available to shareholders on request. An LLC’s equivalent is an operating agreement, which outlines ownership percentages, profit-sharing, management structure, and how the company handles a member’s departure.
The Registered Agent Requirement
Every corporation and LLC must designate a registered agent in the state where it’s formed and in every state where it’s authorized to do business. The registered agent’s job is to receive legal papers, including lawsuits, on behalf of the company. If a process server shows up and nobody’s there, a court may allow the case to proceed without the company ever getting actual notice, which can result in a default judgment. The agent must be available during regular business hours at a physical street address within the state; a P.O. box doesn’t qualify. You can name an individual, use a commercial registered agent service, or in a few states, serve as your own agent.
Limited Liability and How You Can Lose It
Limited liability is the single biggest reason people form a company instead of operating as a sole proprietor. It means the company’s debts and legal obligations belong to the company, not to you personally. If the business is sued or goes bankrupt, your exposure is generally limited to what you invested in your shares or membership interest, and creditors can’t come after your house or savings account to satisfy the company’s obligations.1Legal Information Institute. Limited Liability
That protection is not bulletproof. Courts can “pierce the corporate veil” and hold owners personally liable when the company is really just a shell for the owner’s personal dealings. Veil piercing is most common in closely held companies, and courts carry a strong presumption against it. But when the misconduct is serious enough, they will do it.2Legal Information Institute. Piercing the Corporate Veil
The behaviors that invite veil piercing tend to cluster around a few themes:
- Mixing personal and business funds. Using the company bank account to pay your mortgage, or funneling personal income through the business, erases the line between you and the entity.
- Ignoring corporate formalities. Skipping board meetings, failing to keep minutes, neglecting to file annual reports, or operating without bylaws all signal that the company exists on paper only.
- Undercapitalization. Forming a company with virtually no assets while exposing it to significant liabilities suggests the entity was set up to dodge obligations rather than to run a real business.
- Fraud or injustice. Using the corporate form specifically to commit fraud or evade existing legal obligations is the clearest path to personal liability.
Courts rarely pierce the veil based on a single factor. They look at the overall picture, and the analysis varies by state. The practical takeaway is consistent: if you want limited liability to hold up, treat the company as genuinely separate from yourself.2Legal Information Institute. Piercing the Corporate Veil
Who Runs the Company
Company law assigns three distinct roles inside a corporation. Directors set strategic direction and oversee management. Officers handle day-to-day operations. Shareholders own the company, elect the directors, and vote on major transactions like mergers, charter amendments, and dissolution. In smaller companies these roles often overlap, with the same person serving as sole director, officer, and shareholder. That’s legally permissible in most states, but it makes the formality requirements even more important.
Fiduciary Duties
Directors owe the company two core fiduciary duties. The duty of loyalty requires directors to put the company’s interests ahead of their own. A director who steers a corporate opportunity to a side business, or who votes on a deal where they have an undisclosed personal financial stake, violates this duty.3Legal Information Institute. Duty of Loyalty The duty of care requires directors to make informed decisions with the attention a reasonably prudent person would use in similar circumstances. Rubber-stamping a major acquisition without reading the financial reports, for instance, can breach this duty.
Directors are protected from second-guessing by the business judgment rule, which creates a presumption that decisions were made in good faith, on an informed basis, and in the company’s best interest. The rule doesn’t require directors to be right. It requires them to have gone through a reasonable process before deciding. When a director has a personal conflict of interest, the presumption drops away, and the decision gets much closer judicial scrutiny.
Shareholder Rights
Beyond voting, shareholders have the right to inspect corporate books and records and to receive information about major corporate events. When directors or officers harm the company and the board refuses to act, shareholders can file a derivative lawsuit on the company’s behalf. The shareholder isn’t suing for personal injury; they’re stepping into the company’s shoes because the people running it won’t. Before filing, the shareholder almost always must first demand that the board itself pursue the claim. If the alleged wrongdoing involves the directors themselves, some courts will relax that requirement, since asking people to sue themselves isn’t realistic.
Raising Money
Companies fund their operations through two basic channels. Equity financing means selling ownership interests, whether shares in a corporation or membership units in an LLC, in exchange for capital. Debt financing means borrowing money through bank loans, credit lines, or bonds, with the obligation to repay principal plus interest on defined terms.
Selling equity triggers securities law. Under the Securities Act of 1933, any offer to sell securities to the public must be registered with the Securities and Exchange Commission before the sale goes forward.4U.S. Securities and Exchange Commission. Going Public Registration is expensive and time-consuming, which is why most small and mid-size companies rely on exemptions to raise money without going through the full process. The most commonly used is Regulation D, which allows private offerings to accredited investors and, in some cases, a limited number of other sophisticated purchasers.5eCFR. 17 CFR Part 230 – Regulation D
Dividend payments, the most common way profits reach shareholders, come with their own legal guardrails. Most state statutes prohibit dividends that would render the company insolvent or impair its stated capital. These rules exist to protect creditors, who depend on the company maintaining enough assets to cover its obligations.
How Companies Are Taxed
The structure you choose has a direct impact on how much of the company’s income the government takes and when. A C-corporation pays the federal corporate income tax at a flat 21 percent rate. When the remaining profits are distributed as dividends, shareholders owe individual income tax on the distribution, with qualifying dividends taxed at rates up to 20 percent (plus a 3.8 percent net investment income tax for high earners). The combined effective rate on a dollar of corporate profit that eventually reaches a high-income shareholder can approach 40 percent.
S-corporations and LLCs that elect pass-through treatment avoid this double layer. The company itself pays no federal income tax. Profits and losses pass through to the owners’ individual returns, and the owners pay tax at their personal rates. This is often a significant advantage for smaller businesses, though pass-through owners who actively participate also owe self-employment taxes on their share of income. S-corp owners who work in the business can reduce self-employment tax exposure by taking a reasonable salary and receiving remaining profits as distributions, but the IRS watches closely for salaries set artificially low.
A C-corporation filing on a calendar year generally owes its federal return (Form 1120) by April 15 of the following year, with an automatic extension available to October 15. Missed deadlines produce penalties and interest that compound quickly.
Keeping the Company in Good Standing
Forming the company is only the first step. Maintaining it requires consistent attention to formalities, and this is where a surprising number of businesses slip up. The same behaviors that invite veil piercing are, in practice, failures of ongoing compliance.
Most states require companies to file an annual or biennial report with the secretary of state. The report is usually simple, confirming basic details like the company’s address, registered agent, and officers or directors. Filing fees typically range from under $10 to several hundred dollars depending on the state. Miss the deadline and the company may lose its good standing. Continue to ignore the requirement and the state can administratively dissolve the entity entirely, stripping away its legal existence along with your liability protection.
Corporations in nearly all states must also hold annual meetings of shareholders and directors and document what happens in formal minutes. Auditors, courts, and the IRS may review those minutes in proceedings or investigations. Even LLCs, which face fewer formal meeting requirements, benefit from keeping written records of major decisions to show the entity is operating as a genuinely separate business.
Corporate Transparency Act Reporting
The Corporate Transparency Act, enacted in 2021, originally required most small companies to file beneficial ownership information with the Financial Crimes Enforcement Network (FinCEN). In March 2025, FinCEN issued an interim final rule that fundamentally narrowed the law’s scope. All entities created in the United States are now exempt from beneficial ownership reporting. The obligation applies only to foreign-formed entities that have registered to do business in a U.S. state or tribal jurisdiction.6Financial Crimes Enforcement Network. FinCEN Removes Beneficial Ownership Reporting Requirements for U.S. Companies and U.S. Persons The Treasury Department has also stated it will not enforce penalties against domestic reporting companies or their beneficial owners.7U.S. Department of the Treasury. Treasury Department Announces Suspension of Enforcement of Corporate Transparency Act Against U.S. Citizens and Domestic Reporting Companies
If you operate a foreign-formed entity registered in the United States, you still have a 30-day window from registration (or from the rule’s publication date, for entities already registered) to file a beneficial ownership report with FinCEN. The reporting rules in this area have shifted repeatedly, so verifying your obligations against current FinCEN guidance before assuming you’re exempt is worth the few minutes it takes.
Closing the Company
When a company reaches the end of its life, company law controls how it winds down. The process varies depending on whether the closure is voluntary or forced, but the goal is always the same: convert assets to cash, pay creditors, and distribute anything left over to the owners.
Voluntary Dissolution
The most orderly path is voluntary dissolution, where the owners decide to close the business. This typically requires a board resolution followed by a shareholder vote. Once approved, the company appoints a liquidator (or handles the process internally in smaller companies), sells assets, settles debts, and distributes remaining funds to shareholders. Creditors get paid first, in order of priority, before any owner sees a dollar.
Court-Ordered Dissolution
When a company can’t pay its debts or has violated legal requirements, a court can order compulsory liquidation. A court-appointed liquidator takes over, and the owners lose control of the process. This path is more disruptive and expensive, with the liquidator’s fees and legal costs eating into whatever assets remain. Creditors typically recover less in a compulsory winding-up than they would in an orderly voluntary process.
Administrative Striking Off
A third route involves the state removing the company from its register, usually because the company stopped filing required documents or has been inactive. Striking off is not the same as formal dissolution. It’s appropriate only when the company is solvent, has no outstanding legal actions, and hasn’t been operating. In some states, a struck-off company can be restored to the register within a certain window by filing the overdue paperwork and paying back fees.
Final Tax Filings
Dissolution doesn’t end your obligations to the IRS. A corporation that adopts a plan of dissolution or liquidation must file Form 966 within 30 days of the resolution.8Internal Revenue Service. Form 966 – Corporate Dissolution or Liquidation You’ll also need to file a final income tax return, marked as such, covering the company’s last tax year. Exempt organizations and qualified S-corp subsidiaries are not required to file Form 966, but the final return requirement applies broadly. If an entity is involuntarily dissolved and hasn’t already filed, the 30-day clock starts from the date of the involuntary dissolution.