Prenuptial Agreement: What It Is and How It Works

What is a prenuptial agreement?

A prenuptial agreement, or prenup, is a legally binding agreement that partners enter into before they marry. The agreement covers how couples plan to share their assets, debts, and other finances.

For a prenup to be legally enforceable, it must meet certain requirements. For instance, partners must fully disclose their financial situation, each have their own lawyer, and agree to terms without coercion.

How does a prenup work?

To understand how prenups work, you should know about the creation process and key legal aspects. Here’s what you need to know: 

The drafting process

Partners should begin creating the agreement several months before their wedding date. This allows enough time for thorough discussion and legal review. Each partner, by engaging a lawyer, shares their assets, debts, income and financial obligations. 

Next, it is time to draft the terms. There often are multiple rounds of negotiations and revisions. 

While drafting a prenup, you’ll clarify which assets remain separate and which ones will be shared. A prenup also suggests how to address new assets that may be acquired during a long-term commitment. This includes real estate purchases, business investments, inheritances and gifts.

Some prenups also include provisions for periodic reviews around life events such as the birth of children, career changes or a shift in financial situations.

Enforcement

A prenuptial agreement must be viewed as legally enforceable. Courts evaluate many aspects to determine whether an agreement is enforceable. First, both partners must have adequate and separate legal representation. Second, there must be full financial disclosure. Third, partners must sign the prenup voluntarily. Agreements that are signed too close to the wedding date may be viewed as invalid. 

Courts also check whether the prenup is fair and reasonable. It shouldn’t be more favorable to one partner. The agreement must be valid during the course of the relationship despite changing circumstances.

Triggering events 

Certain events may activate the terms of a prenup. For example, separation is the most common scenario. Another trigger event is the death of a partner.

State law

You should familiarize yourself with some additional legal terms. For one, prenups operate “under the ambit” of state laws. This means that the terms of a prenup can’t violate your state’s laws. For instance, despite what’s in a prenup, state laws govern child support and custody. There may be other state-specific requirements for drafting a prenup, including notarization, witness requirements and language requirements. 

In addition, a prenup must be evaluated against state laws, even when they change. This underscores the importance of periodically reviewing your prenup. 

What prenups don’t include 

Prenups don’t cover decisions including career choices, place of residence, diet or exercise habits or division of household responsibilities. It also can’t determine parenting decisions or day-to-day child-rearing choices.

While prenups may address financial responsibilities for children from previous relationships, they can’t dictate educational choices or custody arrangements.  

Who are prenups for?

Prenups are for everyone! A prenup is about financial planning for couples, not divorce. It's a tool for open communication about finances in your relationship and a way to start the conversation early.

Financial clarity

Prenups set clear expectations about financial responsibilities and asset ownership for couples. This builds transparency among couples about financial situations, including assets and debts. Having clarity about finances from the outset can help avoid challenges later.

Building mutual respect

The collaborative process of drafting a prenup underscores that both partners view each other as equals. Rather than one partner dictating the terms, couples work together to create an agreement that honors both of their contributions and needs. 

Establishing shared values 

Prenups are an opportunity for couples to identify and articulate their core values around finances, family, career and life goals. This helps couples align their values for a shared future and lets them discuss and bridge differences constructively. 

Where to get started with prenups?

Prenups are foundational decisions that you need to get right, without the pressure of time and emotions. 

Neptune transforms what's typically a lengthy, stressful process into a structured experience that respects your timeline without compromising on quality. Think of Neptune as the financial concierge that wealth-building couples trust to lay the foundation for their shared future—starting with prenups.

By combining emotionally-intelligent AI, vetted legal experts, and transparent flat-fee pricing, Neptune creates financial alignment, transforming a traditionally tense process into a relationship-strengthening experience. Start the conversation with Neptune today.