Prenup review: 5 clauses to understand before you sign
Last updated July 27, 2026 · 7 min read
A prenup is signed at the happiest possible moment to plan for the worst possible one, which is why so many people skim it and sign. But a prenuptial agreement is a contract about your financial future, and its clauses can quietly decide what happens to a home, a business, or a career you give up years from now.
The good news is that the terms that matter most are understandable in plain English. Here are the five clauses to read closely before you sign — what to watch for in each, and what to ask for instead.
1. What counts as separate property versus shared — and how does that change over time?
The heart of a prenup is the line between "yours," "mine," and "ours." The trouble is drift: a separate account that later receives shared income, or a house you owned before the marriage that your spouse helps pay down, can quietly become partly marital unless the agreement says otherwise.
Watch for: No definition of how separate property is kept separate, silence on appreciation and income earned during the marriage, or a sweeping clause that converts your premarital assets to joint.
Ask for: A clear rule that separate property — plus its growth and income — stays separate, and defined treatment for any asset both spouses contribute to.
2. Are you waiving spousal support — and do you understand what that means?
Many prenups waive or cap alimony. That can be reasonable between two earners and devastating for a spouse who later leaves the workforce to raise children or support the other’s career. Some courts also refuse to enforce a support waiver that leaves one spouse destitute.
Watch for: A full waiver of spousal support with no exception for a long marriage, caregiving, or a large income gap that develops later.
Ask for: A support provision that scales with the length of the marriage and any career sacrifice, rather than a flat, permanent waiver.
3. Was there full, honest financial disclosure before signing?
A prenup can be thrown out if one spouse hid assets or debts, or if the other never really understood what they were signing. Disclosure and independent understanding are not paperwork formalities — they are what makes the agreement hold up.
Watch for: No attached schedule of each person’s assets and debts, a prenup presented days before the wedding, or one spouse with a lawyer and the other with none.
Ask for: Complete written disclosure from both sides, enough time to review well before the wedding, and independent counsel for each spouse.
4. Does the agreement ever expire or soften over time?
A sunset clause makes the prenup expire, or become more generous, after a set number of years. Without one, terms that felt fair for a two-year marriage still govern a twenty-five-year one, long after the couple’s finances have merged in practice.
Watch for: No sunset or review provision, so the same rigid terms apply forever regardless of how long the marriage lasts.
Ask for: A sunset clause or step-down schedule that loosens or ends the agreement after a defined number of years or milestones.
5. Who is responsible for debts — including ones that come later?
Prenups allocate debt as well as assets. If the agreement is silent, you can end up sharing responsibility for a spouse’s student loans, business borrowing, or credit-card debt — sometimes debt taken on without your knowledge.
Watch for: No clause separating premarital debt, and no protection against liability for debt one spouse takes on individually during the marriage.
Ask for: Clear separation of each spouse’s premarital debt and a rule that individually incurred debt stays with the spouse who took it on.
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Review your prenup freeFrequently asked
What are the most important clauses in a prenup?
How separate versus marital property is defined and kept separate, any spousal-support waiver, financial disclosure, whether the agreement has a sunset clause, and how debts are allocated. These decide who keeps what if the marriage ends.
What can make a prenup unenforceable?
Common reasons include hidden or incomplete financial disclosure, signing under pressure or right before the wedding, a lack of independent legal advice, or terms so one-sided that a court considers them unconscionable. Requirements vary by state.
Do I need a lawyer to review a prenup?
Each spouse having their own attorney both protects you and helps the agreement hold up. A fast, side-aware review can first flag the clauses that lean against you — support waivers, property definitions, missing sunset — so you know exactly what to raise with counsel.
This guide is general information, not legal advice, and Initialed AI is not a law firm. Prenuptial-agreement law varies by state, and enforceability turns on the details. Before signing, each spouse should consult their own qualified attorney.