
A life insurance policy is a unilateral contract because of its one-sided nature, where the insurer makes a promise to pay a benefit to the beneficiary in exchange for a premium payment from the policyholder. This contract is not reciprocal, as the insurer's obligation is to pay the benefit, while the policyholder's obligation is to pay the premium.
The policyholder's payment of premiums is a consideration that gives rise to the insurer's obligation to pay the benefit. This is evident in the policy's terms, which specify the premium amount and payment schedule.
The unilateral nature of the contract is also reflected in the policy's cancellation provisions, which allow the insurer to cancel the policy at any time, but do not provide the policyholder with a similar right to cancel.
In essence, the policyholder's only role is to pay the premium and provide the required information, while the insurer bears the risk of paying the benefit.
What is a Contract?

A contract is an agreement between two or more parties that is legally binding. It's a promise to do something or provide a benefit in exchange for something else. In the case of a unilateral contract, only one party makes a promise to perform a specific action or provide a benefit to another party.
The key characteristic of a unilateral contract is that the offeror, the party making the promise, is the only one bound by the agreement. The offeree, the party to whom the offer is made, is not required to respond or promise anything.
A unilateral contract is typically presented as a "take it or leave it" offer, with no room for negotiation or modification by the offeree. This is in contrast to bilateral contracts, where both parties make mutually binding promises.
One common example of a unilateral contract is an insurance policy, where the insurance company makes a promise to pay a specified amount to the policyholder in the event of a covered loss. The policyholder is not required to make a claim, but if they do and the claim meets the policy's conditions, the insurance company is legally bound to pay out the benefit.
The offeree accepts the contract by completing the specified task or meeting the stated conditions, rather than through a formal agreement or signature. This acceptance is known as "acceptance through performance."
Here are the key characteristics of unilateral contracts:
- One-sided obligation: Only the offeror is legally bound by the promise made in the contract.
- Acceptance through performance: The offeree accepts the contract by completing the specified task or meeting the stated conditions.
- No negotiation: Unilateral contracts are typically presented as "take it or leave it" offers, with no room for negotiation or modification by the offeree.
- Open offers: In many cases, unilateral contracts are open offers that can be accepted by anyone who fulfills the specified requirements.
Bilateral vs Unilateral Contracts
In a bilateral contract, both parties make a promise and are bound by each other's promise, distinguishing it from a unilateral contract. This mutual obligation is the key difference between the two.
In a unilateral contract, only one party is bound by the agreement, and the contract is formed when the offeree performs the act. The offeror makes the promise upfront, and the offeree's action triggers the contract.
A unilateral contract is like a one-way street, where the insurance company promises to pay a specified amount in the event of a covered loss, but the policyholder isn't obligated to make a claim.
Agreement Comparison Table
In a unilateral contract, only one party makes a legally binding promise, whereas in a bilateral contract, both parties make promises to each other.

A unilateral contract is typically presented as a "take it or leave it" offer with no room for negotiation, whereas a bilateral contract allows for negotiation between the parties before acceptance.
Here's a comparison table to help illustrate the key differences:
Bilateral Contracts: Key Differences
Bilateral contracts involve a mutual exchange of promises between two parties, making both parties simultaneously offerors and offerees.
In a bilateral contract, both parties are bound by the agreement, whereas in a unilateral contract, only one party is bound by the agreement.
One of the key characteristics of a bilateral contract is that it requires a mutual obligation, where each party makes a promise and is bound by the other's promise.
Both parties in a bilateral contract make a promise and are bound by the other's promise, creating a more equal and reciprocal relationship compared to unilateral contracts.
In a bilateral contract, the contract is formed when both parties simultaneously agree to the terms and conditions of the agreement, whereas in a unilateral contract, the contract is only formed when the offeree performs the act.
Insurance Contracts

Insurance contracts are a great example of unilateral contracts in action. They're typically governed by a promise from the insurance company to pay out a certain amount of money or provide specific benefits if a predefined event occurs.
In the insurance industry, these contracts are the norm, with policyholders not obligated to claim the benefits. This makes sense, as people often purchase insurance policies for peace of mind, not necessarily expecting to file a claim.
A car accident, house fire, or health issue are all examples of predefined events that trigger the insurance company's promise to pay out. This structure is a fundamental aspect of insurance contracts.
Some aspects of subscription services, like promotional offers, can also be structured as unilateral contracts. For instance, a streaming service might offer a month of free service if a subscriber watches a certain number of hours of content within a specific timeframe.
Key Differences and Enforcement

A unilateral contract, like a life insurance policy, is a one-sided agreement where only one party makes a legally enforceable promise. This promise is binding only when the offeree completes the specified action or meets the stated conditions.
The key differences between unilateral and bilateral contracts are significant, and understanding these differences is crucial for effective contract management. One of the main differences is that unilateral contracts are typically presented as "take it or leave it" offers, with no room for negotiation or modification by the offeree.
Here are the key differences and enforcement characteristics of unilateral contracts:
- One-sided obligation: Only the offeror is legally bound by the promise made in the contract.
- Acceptance through performance: The offeree accepts the contract by completing the specified task or meeting the stated conditions rather than through a formal agreement or signature.
- No negotiation: Unilateral contracts are typically presented as “take it or leave it” offers, with no room for negotiation or modification by the offeree.
- Open offers: In many cases, unilateral contracts are open offers that can be accepted by anyone who fulfills the specified requirements, rather than being directed at a specific individual or entity.
Differences Between Contract
In a unilateral contract, only one party is bound by the agreement, with the offeror making the promise upfront and the contract only forming when the offeree performs the act.
The main difference between unilateral and bilateral contracts lies in who is bound by the agreement. In a bilateral contract, both parties are simultaneously offerors and offerees, each making a promise and being bound by the other's promise.
This mutual obligation is what distinguishes bilateral contracts from unilateral ones, where a single party's promise is enough to form a contract.
Who Enforces Promises in a Contract?

In a unilateral contract, the offeror is the one who makes the legally enforceable promise. The offeree's role is to decide whether to accept the offer by performing the specified task or meeting the stated conditions, but they are not obligated to do so.
The offeror becomes legally bound to fulfill their promise once the offeree accepts the offer by performing the required action. This is a critical distinction to understand in contract law.
In a unilateral contract, only one party makes a legally enforceable promise, which sets it apart from other types of contracts. This can have significant implications for the parties involved.
Unilateral in Insurance
A unilateral contract in insurance is a one-sided promise made by the insurer to pay a specified amount to the policyholder in the event of a covered loss. This type of contract is common in the insurance industry.
The policyholder is not obligated to make a claim, but if they do and the claim meets the policy's conditions, the insurance company is legally bound to pay out the benefit. This is a key characteristic of unilateral contracts.

In a unilateral contract, the offeror's promise becomes binding only when the offeree completes the specified action. This means that the policyholder doesn't have to do anything to receive the benefit, but if they do make a claim, the insurer must pay up.
The insurer promises to pay in the event of a specific occurrence, such as a car accident or house fire, but the policyholder is not obligated to make a claim. This is why unilateral contracts are often used in insurance policies.
A unilateral contract can be structured as a promotional offer, such as a streaming service offering a month of free service if a subscriber watches a certain number of hours of content within a specific timeframe. This is similar to how insurance policies are structured, where the insurer promises to pay a specified amount in the event of a covered loss.
Sources
- https://ironcladapp.com/journal/contracts/unilateral-vs-bilateral-contracts/
- https://www.nextinsurance.com/glossary/unilateral-contract/
- https://www.icertis.com/contracting-basics/what-is-a-unilateral-contract/
- https://www.malbek.io/blog/unilateral-vs-bilateral
- https://www.brainscape.com/flashcards/life-health-1-chapters-1-2-3-4-2592998/packs/4295077
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