What Does a Prenup Cover? Everything You Can and Can't Include

A prenup covers money and property. At its core, a prenuptial agreement lets you decide in advance who owns what, who owes what, and what each spouse will or won't receive if the marriage ends in divorce or death. It can reach almost any financial matter between two spouses — property, debts, spousal support, inheritance, and a business. What it cannot do is decide things that belong to a court or to your children: it cannot set child custody or child support, and it cannot enforce personal, non-financial demands. No, a prenup does not "cover everything."

Because prenuptial agreements are governed by state law — not a single federal statute — the exact boundaries shift depending on where you live. The categories below hold true broadly across the country, but your state may treat a specific clause differently. This page is the hub for our prenup coverage guides; each section links to a deeper article on that topic.

What a Prenup Can Cover

These are the areas a properly drafted prenup can address in most states:

Property you bring into the marriage

A prenup can confirm that assets you owned before the wedding — a home, savings, investments, retirement accounts — stay yours as separate property rather than becoming marital property subject to division. This is the most common reason people sign one. See how a prenup can protect your house.

Property and earnings acquired during the marriage

You can decide in advance how income, savings, and assets built during the marriage will be classified and divided. A prenup can keep future earnings or a future asset separate instead of marital — within the limits your state allows. See whether a prenup covers future assets and earnings.

Debt

A prenup can shield one spouse from the other's debts — student loans, credit cards, business liabilities — by assigning responsibility for each debt and confirming which debts stay separate. See how a prenup covers debt.

Spousal support (alimony)

In most states a prenup can waive, cap, or define alimony in advance. But this is one of the most heavily scrutinized clauses: some states limit or refuse to enforce an alimony waiver if it would leave a spouse destitute, and a court may set it aside if enforcing it would be unconscionable at the time of divorce. See how a prenup handles alimony and spousal support.

Inheritance and estate rights

A prenup can protect a family inheritance, coordinate with a will or trust, and waive the right a surviving spouse would otherwise have to claim a share of the other's estate. It works alongside — not instead of — your estate planning documents. See how a prenup protects inheritance.

A business or professional practice

If you own a business, a prenup can keep it (and its future growth) separate, spell out whether your spouse gets any interest, and prevent a co-owner spouse from disrupting operations in a divorce.

Other financial arrangements

• How household bills and accounts are managed during the marriage
• Whether one spouse will be the beneficiary of a life insurance policy
• How a specific item of property (a vacation home, an heirloom) is handled
• Which state's law governs the agreement
• How disputes over the agreement will be resolved

What a Prenup Cannot Cover

Some terms a court will ignore no matter how clearly you write them. These limits exist in every state, even if the details differ.

Child custody and parenting time

You cannot lock in custody or a parenting schedule through a prenup. When parents separate, a court decides custody based on the child's best interests at that time — a standard the court applies independently, and that no advance contract between the parents can override. A custody clause in a prenup is simply disregarded.

Child support

Child support belongs to the child, not the parents, so parents cannot bargain it away in advance. A prenup cannot waive, cap, or pre-set child support. A court calculates it under state guidelines based on the parents' circumstances when support is actually ordered.

Anything illegal or against public policy

A prenup cannot require anything that violates the law or your state's public policy. Terms a court is likely to strike include anything designed to encourage or reward divorce and anything that tries to limit a parent's obligations to a child.

Personal, non-financial demands ("lifestyle clauses")

Clauses about chores, weight, frequency of intimacy, in-laws, or who does the dishes are generally unenforceable. Courts treat a prenup as a financial contract, not a rulebook for the marriage. Even if such a clause is written in, a judge will usually refuse to enforce it.

Penalty clauses for behavior — use caution

"Infidelity clauses" or other penalty-for-conduct provisions live in a gray zone. Some states enforce a narrow financial penalty for cheating; many do not, viewing it as contrary to no-fault divorce principles. Enforceability varies widely by state. See whether infidelity and cheating clauses are enforceable.

Does a Prenup Cover Everything? No — Here's the Line

The simplest way to remember the boundary: a prenup governs the financial relationship between the two spouses. It does not govern the relationship between a parent and a child, and it cannot bind a court on issues the law reserves for the court's independent judgment — chiefly child custody, child support, and basic fairness. Anything financial and between the two of you is usually fair game; anything involving the kids or the public interest is not.

Why "It Depends on Your State" Keeps Coming Up

Prenups are creatures of state law. Many states follow a version of the Uniform Premarital Agreement Act or the newer Uniform Premarital and Marital Agreements Act, but states adopt and modify these model laws differently, and some follow neither. That is why an alimony waiver enforceable in one state might be limited in another, and why notarization is required in some states but not others.

A few practical consequences of this for what your prenup can cover:

• Disclosure rules vary, but a written waiver matters. Most states require each spouse to disclose their finances. Under the Uniform Premarital Agreement Act, weak disclosure by itself is not enough to throw out a prenup — it is examined as part of whether the agreement was unconscionable, and a knowing, voluntary written waiver of disclosure can defeat a later disclosure-based challenge. Other states are stricter. Either way, full written disclosure is the safest path.
• Alimony waivers get extra scrutiny. Whether — and how far — you can waive spousal support depends on your state.
• Formalities differ. Whether the agreement must be notarized or witnessed depends on your state. See whether a prenup must be notarized or witnessed.

What You Can Do

1. List what you actually want to protect. Before talking to anyone, write down the assets, debts, inheritance, or business interests you care about. That list tells you which coverage areas above apply to you.
2. Start early — timing is critical. A prenup must be signed before the wedding, and an agreement sprung on a partner days before the ceremony invites a claim that it was signed under pressure. Begin months ahead, not weeks. (Already married? You may want a postnuptial agreement instead — see getting a prenup-equivalent after marriage.)
3. Disclose everything in writing. Attach a complete financial schedule — every significant asset, debt, and income source — as an exhibit. This protects the parts of the agreement you care most about if it is ever challenged.
4. Have your own lawyer. Each spouse should have independent counsel; it strengthens enforceability and helps you understand what each clause really does. See whether you need a lawyer for a prenup and what a prenup costs.
5. Confirm your state's rules. Notarization, witnessing, and the limits on alimony waivers all turn on state law. A family-law attorney licensed where you live can tell you exactly what your prenup can and cannot cover.
6. Skip the unenforceable stuff. Leave out child custody, child support, and lifestyle clauses. Loading a prenup with terms a court will toss can weaken confidence in the rest of the document.

Related Prenup Questions

Use these guides to go deeper on whether and how a prenup works for you:

• Do I need a prenup?
• Is a prenup enforceable?
• Can a prenup be voided?
• Can you get a prenup after marriage (postnup)?

Time-sensitive: a prenup only counts if it is signed before the marriage, and signing too close to the wedding date is one of the most common reasons courts later refuse to enforce one. Give yourself months of lead time.

This article is general legal information, not legal advice. Prenup law varies by state — consult a licensed family-law attorney in your state about your specific situation.