Contracts

A handshake deal can be just as legally binding as a signed document — the real trick is proving what was actually agreed to.

Cheat Sheet

A contract is a legally enforceable agreement between two or more parties, creating obligations that courts will step in to enforce if one side fails to hold up their end.
For a contract to be legally valid, it generally needs an offer, acceptance of that offer, and 'consideration' — something of value exchanged between the parties.
Contracts don't have to be written down to be legally binding in many situations; verbal agreements can also be enforceable, though written contracts are far easier to prove and enforce.
A breach of contract occurs when one party fails to fulfill their agreed-upon obligations without a legally valid excuse, potentially entitling the other party to damages or other remedies.
Certain types of contracts, such as those involving real estate or agreements lasting longer than a year, are generally required by law to be in writing to be enforceable.
A contract can be voided or deemed unenforceable if it involves fraud, was signed under duress, or requires one party to do something illegal.

The 60-Second Version

A contract is a legally enforceable agreement between two or more parties, creating obligations that courts will step in to enforce if one side fails to hold up their end. For a contract to be legally valid, it generally needs an offer, acceptance of that offer, and "consideration" — something of value exchanged between the parties. Contracts don't have to be written down to be legally binding in many situations; verbal agreements can also be enforceable, though written contracts are far easier to prove and enforce. A breach of contract occurs when one party fails to fulfill their agreed-upon obligations without a legally valid excuse, potentially entitling the other party to damages or other remedies. Certain types of contracts, such as those involving real estate or agreements lasting longer than a year, are generally required by law to be in writing to be enforceable. A contract can be voided or deemed unenforceable if it involves fraud, was signed under duress, or requires one party to do something illegal.

The Long Version

What Makes an Agreement a Contract

A contract is a legally enforceable agreement between two or more parties, creating real obligations that courts will step in to enforce if one side fails to hold up their end, distinguishing a contract from a casual promise that carries no legal weight behind it.

The Three Basic Ingredients

For a contract to be legally valid, it generally needs three core elements: an offer proposing specific terms, acceptance of that offer by the other party, and "consideration," meaning something of genuine value exchanged between the parties, whether money, goods, services, or a mutual promise to act. Without all three elements present, an agreement generally isn't legally enforceable as a contract.

Written vs. Verbal Agreements

Contracts don't have to be written down to be legally binding in many everyday situations; verbal agreements can also be enforceable under the law. In practice, however, written contracts are far easier to actually prove and enforce, since a written document removes much of the ambiguity and disputed memory that verbal agreements are prone to when disagreements arise later.

When Agreements Break Down

A breach of contract occurs when one party fails to fulfill their agreed-upon obligations without a legally valid excuse, potentially entitling the other, harmed party to damages or other legal remedies through the courts. Certain categories of contracts, such as those involving real estate transactions or agreements that by their terms cannot be completed within a year, are generally required by a legal doctrine called the Statute of Frauds to be in writing in order to be enforceable at all, regardless of what was verbally agreed.

When a Contract Isn't Actually Valid

Even a contract with all the right formal elements can still be voided or deemed unenforceable under certain conditions, specifically if it involves fraud, was signed under duress or undue pressure, or requires one party to do something illegal, since courts generally won't enforce agreements built on deception, coercion, or unlawful terms.

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Why People Care

Contracts quietly govern an enormous share of everyday life, from signing a lease to accepting a job offer, and understanding the basic requirements that make an agreement enforceable helps people recognize what they're actually agreeing to before they sign.

Glossary

Offer: A clear proposal by one party to enter into an agreement on specific terms, one of the basic requirements for a valid contract.
Consideration: Something of value exchanged between parties to a contract, such as money, goods, or a promise to act; a legal requirement for most valid contracts.
Breach of contract: A failure by one party to fulfill their agreed-upon contractual obligations without a legally valid excuse.
Damages: Monetary compensation a court may award to a party harmed by another party's breach of contract.
Statute of Frauds: A legal doctrine requiring certain types of contracts, such as those involving real estate, to be in writing to be enforceable.