Business Law

Last reviewed on April 27, 2026.

What business law covers

"Business law" is shorthand for the rules that touch every stage of running a business: choosing a legal form, putting agreements in writing, hiring people, protecting ideas, handling regulators, paying taxes, and unwinding when the time comes. Most of those rules sit at the state level (corporate codes, contract law, employer-employee statutes), with a federal layer on top for things like trademarks, patents, securities, antitrust, and certain employment protections.

For most readers — solo founders, partners launching a small company, owners of an established main-street business — the practical question is rarely "what is the perfect legal answer?" but "what is the cheapest, simplest structure that protects me from the most likely risks?" Almost every chapter of business law can be reframed that way: identify what could go wrong, decide which tools (entity choice, contract clauses, insurance, compliance procedures) reduce that risk, and pick the smallest set that gets the job done.

Business entity types

Choosing between an LLC and a corporation

For most small businesses, the choice that actually matters is between an LLC and a corporation. A few questions usually settle it:

• Are you raising outside investment from venture capital? A Delaware C-corporation is the standard. Almost every institutional investor is set up to fund C-corp stock and not LLC interests.
• Do you want pass-through taxation by default? An LLC is taxed as a sole proprietorship (single-member) or partnership (multi-member) by default, and can elect S-corporation treatment if it meets the eligibility requirements.
• How much corporate formality can you tolerate? Corporations require boards, officers, annual meetings, and minutes. LLCs are far lighter — an operating agreement and an annual filing in most states.
• Will you have employees, or rely entirely on contractors? Either entity can employ people, but payroll, withholding, workers' comp, and unemployment insurance are entity-neutral obligations that often get underestimated by first-time founders.

For state-by-state filing details and step-by-step formation guides, see the LLC formation guides.

Contracts: the spine of every small business

Most disputes a small business runs into can be traced back to a contract that was either not written down or not read carefully. The contracts that matter most are usually:

• Customer-facing terms. What you sell, when you deliver, what counts as acceptance, when payment is due, what happens if either side walks away. Even a one-page document is far better than nothing.
• Vendor and supplier agreements. Pay attention to delivery deadlines, quality standards, indemnification, and the right to terminate.
• Independent-contractor agreements. Make IP assignment explicit (the contractor's work belongs to the company), and don't assume "work made for hire" language alone covers everything in every state.
• Employment offer letters and at-will language. Most US employment is at-will, but written agreements that imply otherwise can change that.
• NDAs. Useful when you're sharing genuinely confidential information; less useful when you're trying to lock in a client. Keep them narrow and time-bounded.
• Partnership / operating / shareholder agreements. Required reading before a co-founder leaves, dies, divorces, or wants to be bought out. The cheapest time to negotiate these terms is when everyone is friends.

Intellectual property in two minutes

• Trademarks protect brand identifiers — names, logos, taglines — used in commerce. You can build common-law rights by using a mark; federal registration with the USPTO adds nationwide protection and stronger remedies.
• Copyrights protect original creative works fixed in a tangible form. Protection arises automatically; registration unlocks statutory damages and the right to sue.
• Patents protect novel, non-obvious, useful inventions for a fixed term. They are expensive to obtain, and pursuing one only makes sense when the invention has clear commercial value and a defensible scope.
• Trade secrets protect anything kept genuinely secret with reasonable security measures. They have no application fee and no expiry — but lose protection the moment the secret leaks.

Regulatory and compliance basics

Even a small business has to satisfy some baseline obligations: a federal Employer Identification Number, the right state and local business licences, sales-tax registration (if you sell taxable goods or services), payroll-tax filings, and any industry-specific permits. Privacy regimes — California's CCPA, the EU's GDPR if you sell to European customers — can apply even to small US businesses that collect personal data online. The cost of catching a compliance gap during quarterly bookkeeping is far lower than catching it during an audit.

Common disputes

• Unpaid invoices. Often handled in small claims court, especially below the state's small-claims dollar limit.
• Co-founder fall-outs. Triggered when one founder wants out and the operating agreement is silent or one-sided.
• Employee separation disputes. Wrongful-termination claims, wage-and-hour claims, non-compete enforcement.
• Vendor non-performance. Late delivery, defective goods, missed milestones.
• Trademark conflicts. Cease-and-desist letters from a senior user with a confusingly similar mark.

When to bring in a business attorney

Hire one before you sign anything that materially changes the structure of the company: forming the entity, taking on co-founders, accepting outside investment, signing a multi-year lease, buying or selling the business, or settling a meaningful dispute. Hire one to review any contract that involves significant money, multi-year commitments, IP assignment, or personal guarantees. The find a lawyer page lists state bar referral services that screen for business-law experience.

Related resources

• LLC formation guides by state
• Court filing fees by state
• Employment law overview
• Business terms in the legal glossary