What is a prenuptial agreement

A simple definition

A prenuptial agreement (often called a “prenup”) is a contract a couple signs before they marry. It lays out what happens to certain property or debts if the marriage ends.

Prenups are part of family law in the United States. The details can vary by state, so the rules where you live matter. This page gives general information, not legal advice.

• Signed before marriage
• Usually about property, debts, and sometimes support
• State laws and court rules affect whether it’s enforced

What a prenup can cover

Many prenups focus on financial matters. For example, they may list which assets each person brought into the marriage (like a house, savings, or investments) and how those assets should be treated later.

A prenup can also address debts—such as student loans or credit card debt—so both sides understand what is separate and what is shared. Some agreements include rules about how to handle income during the marriage, or how property should be divided if the marriage ends.

In some states, prenups may cover spousal support (sometimes called alimony), but courts may still review the terms. Because family law varies, it’s important to check your state’s approach and how courts look at these agreements.

Why people consider a prenup

For some couples, a prenup is about clarity. It can reduce uncertainty about money and property by writing expectations down in advance.

For others, it’s about protecting specific assets. For example, someone who owns a business, has an inheritance, or has children from a previous relationship may want to explain how those interests will be handled.

A prenup can also be a practical way to talk about finances before marriage. These conversations can be emotional, especially if one partner is worried about the future. Even when a prenup is not required, it can help couples agree on basics early.

Key requirements and common reasons prenups are challenged

Because a prenup is a contract, courts look at whether it was made fairly and correctly. While each state has its own rules, common issues include whether both people had enough time to consider the agreement before signing.

Courts may also consider whether each person had full and honest financial information. If one partner didn’t understand the terms, didn’t get proper information, or felt pressured, the agreement may be harder to enforce.

Another common factor is that the agreement must be written in a way that follows state law. Sometimes the terms need to be specific and balanced. If a prenup includes provisions that conflict with public policy (the state’s core fairness rules), a court may limit or reject certain parts.

Timing: when to talk and when to sign

It’s best to plan early. Prenups generally need time for both people to review the document and ask questions. Rushing can raise concerns that one person didn’t have a fair chance to consider the agreement.

Timing can also matter for how well the agreement is supported. If changes happen close to the wedding, or if one partner is only given the document shortly before signing, that may lead to problems later.

If you’re thinking about a prenup, consider starting the conversation with calm, practical goals: what you each want clarified, what information you both need, and what questions you want answered. For more divorce basics, you can visit our divorce guide.

Next steps: getting answers and matching with help

If you’re considering a prenup, you may want to learn how family law works in your state and what courts commonly expect for enforceability. You can start with family law guides for general background and plain-language explanations.

When you’re ready, we can help you find a qualified family-law attorney in the US through get-matched. An attorney can explain state-specific rules, review what you plan to include, and help you understand how to protect your rights and interests.

Remember: this is general education. A prenup can be personal and complex, so professional guidance can make a big difference.