Prenuptial Agreement Impact
Understand how your prenuptial agreement is likely to shape the financial outcome.
What a prenup can and cannot do
A prenuptial agreement is a contract two people sign before marriage that decides, in advance, how money and property will be handled if the marriage ends or one spouse dies. It is not a sign that anyone expects to divorce. For many couples it is simply a way to be clear and fair up front, especially when one person brings significant assets, a business, or children from a prior relationship into the marriage. A prenup mostly works by changing what would otherwise happen under your state's default property rules.
There are real limits on what a prenup can control. It can define what stays separate property, how marital property and debts get divided, and whether either spouse will pay or waive spousal support. It cannot decide child support or child custody, because those are always settled in the child's best interest at the time of the divorce, not locked in years earlier. A court can also throw out a prenup that is unfair or was signed under pressure, so how the agreement is made matters as much as what it says.
Enforceability comes down to a few things courts look for: both people signed voluntarily without pressure, each fully disclosed their finances, the terms were not grossly one-sided, and ideally each spouse had their own attorney. This tool helps you weigh what a prenup could protect against the cost and the enforceability risk in your situation. Pick your state to see the property system a prenup would be modifying where you live.
Your prenup situation
Use 0 if alimony is unlikely in your situation.
This estimate is for planning purposes only and does not constitute legal or financial advice. Consult a licensed family law attorney in your state for guidance specific to your situation.
Prenuptial Agreement Impact by State
Divorce laws, fees, and formulas change at every state line, so the same situation can cost very different amounts depending on where you file. Choose your state for an estimate built on its own rules.
Prenuptial Agreements - Frequently Asked Questions
What does a prenup cover?
A prenuptial agreement can set what counts as each spouse's separate property, how property and debts acquired during the marriage will be divided, and whether spousal support will be paid, limited, or waived. It is especially useful for protecting a business, premarital assets, or an inheritance, and for clarifying responsibility for debts. In short, it lets a couple set their own rules instead of relying on the state's defaults.
What can a prenup not cover?
A prenup cannot decide child support or child custody. Courts settle those based on the child's best interest at the time of the divorce, so any clause trying to fix them in advance is unenforceable. It also cannot include anything illegal or terms a judge would find grossly unfair, and it cannot waive a right that the law does not allow you to give up.
What makes a prenup enforceable?
Courts generally look for four things: both people signed voluntarily and without pressure, each gave full and honest disclosure of their finances, the terms are not unconscionably one-sided, and there was enough time before the wedding to consider it. Having each spouse represented by their own attorney strongly supports enforceability. A prenup sprung on someone days before the wedding is far more likely to be challenged.
How much does a prenup cost?
Cost depends on the complexity of your finances and your location, but a prenup is generally far less expensive than a contested divorce later. Simple agreements cost less, while those involving a business, significant assets, or heavy negotiation cost more. Because each spouse should ideally have their own attorney review it, plan for two sets of legal fees.
How is a postnup different from a prenup?
The only real difference is timing. A prenuptial agreement is signed before the wedding, and a postnuptial agreement is signed after the couple is already married. They cover similar ground, but courts sometimes scrutinize postnups more closely because spouses owe each other a higher duty of fairness once married. Both still require full disclosure and voluntary, fair terms.
Does each spouse need their own attorney?
It is strongly recommended. Independent counsel for each spouse is one of the clearest signs that both people understood the agreement and signed it voluntarily, which is exactly what a court wants to see. One attorney cannot fairly represent both sides, since their interests can conflict. Skipping separate representation is a common reason prenups get challenged later.
This estimate is for planning purposes only and does not constitute legal or financial advice. Consult a licensed family law attorney in your state for guidance specific to your situation.