If your husband is demanding a postnup, do one thing before you respond to the proposal in any way: hire your own attorney. A postnuptial agreement is a binding contract that decides how your assets, debts, and spousal support get divided if the marriage ends, and the word “demanding” is itself a warning. Agreements signed under pressure, without independent legal advice, are exactly the kind courts later refuse to enforce. You have more leverage here than you probably think, and almost all of it depends on slowing the process down.
Why He May Be Asking
Before assuming the worst, consider what might be driving the request. Postnups often surface after a major financial change: one spouse launches a business, receives a large inheritance, or takes on significant debt. Some couples use them as a reconciliation tool after infidelity or a rough patch, putting financial expectations on paper as part of rebuilding trust. Others want to protect children from a prior marriage, making sure certain assets pass to those children rather than getting absorbed into the marital estate.
The reason matters because it shapes the negotiation. A husband who wants to ring-fence a new business is asking for something very different from one who wants you to waive spousal support. Understanding the motivation helps you and your attorney judge whether the proposed terms are reasonable or one-sided.
What a Postnup Can and Cannot Cover
Postnuptial agreements typically address how real estate, investments, bank accounts, business interests, retirement funds, and debts get split if the marriage ends. They can define financial responsibilities during the marriage, like who pays the mortgage or how joint accounts are managed. They can also include spousal support terms, including whether one spouse waives alimony, though courts scrutinize those provisions heavily.
What a postnup cannot do is settle child custody or child support. Courts decide both based on the child’s best interests at the time of separation, and no agreement between parents overrides that. Any provision that encourages divorce, such as a financial bonus for filing, is also unenforceable.
Your Biggest Protection: Courts Scrutinize Postnups Harder Than Prenups
Here is something most spouses in your position don’t realize. Postnuptial agreements face tougher judicial review than prenups. Unmarried people negotiating a prenup are essentially two independent parties making a deal. Married spouses, by contrast, owe each other fiduciary duties — a legal obligation of good faith, honesty, and fair dealing. Because of that relationship, courts look closely at whether both spouses had full information, adequate time, and genuinely equal bargaining power when signing.
That heightened scrutiny works for you. It means the agreement has to be demonstrably fair, fully transparent, and free of pressure to survive a challenge later. Several specific requirements have to be met for the document to hold up.
Independent Legal Counsel
Each spouse should have their own attorney. A single lawyer cannot fairly represent both sides of a postnuptial negotiation because the spouses’ interests are directly adverse — what benefits one often comes at the other’s expense. The American Bar Association’s professional conduct rules recognize that representing clients with conflicting interests compromises the loyalty and independent judgment every client deserves.1American Bar Association. ABA Model Rules of Professional Conduct – Rule 1.7 Conflict of Interest Current Clients If your husband hands you a draft prepared by his attorney, that attorney is not looking out for you. Get your own.
Full Financial Disclosure
Both spouses have to lay their finances bare — every asset, every debt, every income stream. That includes the obvious items like real estate, bank accounts, and retirement plans, but also things people often overlook: cryptocurrency, stock options with vesting schedules, business valuations, life insurance policies with cash value, and even expected inheritances. Omitting material information can invalidate the entire agreement.
You cannot make an informed decision about waiving rights to assets you don’t know exist. If your husband’s disclosure feels incomplete, vague business valuations, missing account statements, no mention of a rental property you know about, flag it with your attorney immediately. Incomplete disclosure is one of the most common grounds for getting a postnup thrown out later.
No Duress or Coercion
The agreement has to be signed freely. If your husband threatens divorce, cuts off financial access, or creates an emotional crisis to pressure you into signing quickly, that is exactly the kind of coercion courts look for when deciding whether to enforce the document. A postnup negotiated during calm conditions, with real time for both sides to review, is far more likely to hold up than one signed in the middle of an ultimatum.
There is no universal statutory minimum for review time, but the principle is clear: rushed agreements invite challenges. If you are handed a document and expected to sign that week, the timeline itself can later become evidence of pressure.
Fairness
Even a voluntarily signed postnup can be struck down if a court finds it unconscionable, meaning so one-sided that enforcing it would be fundamentally unjust. Courts evaluate fairness both at the time of signing and at the time of enforcement. An agreement that seemed reasonable at signing can become unconscionable if circumstances change dramatically — for instance, if one spouse leaves the workforce to raise children while the other’s income triples.
Pay Extra Attention to Spousal Support Waivers
If the proposed postnup asks you to waive spousal support, treat that provision with extreme caution. While postnups can include alimony terms, courts in many jurisdictions will refuse to enforce a waiver that would leave one spouse unable to support themselves. Some states require that the spouse giving up support have independent legal representation at signing; without it, the waiver is automatically unenforceable.
Changed circumstances matter here more than almost anywhere else in the agreement. Waiving alimony when both spouses earn similar incomes looks very different from waiving it after one spouse has spent a decade out of the workforce. Your attorney should evaluate not just whether the waiver seems fair today but whether it could become devastating under realistic future scenarios.
Retirement Accounts Follow Federal Rules
Retirement accounts governed by federal law — 401(k)s, pensions, and similar employer-sponsored plans — follow their own rules that override whatever the postnup says. Under federal law, these plans must provide survivor benefits to a married participant’s spouse, and waiving those benefits requires a specific process that goes beyond simply signing a postnuptial agreement.
To validly waive survivor benefits in an ERISA-qualified plan, the spouse must consent in writing, the waiver must designate an alternate beneficiary or payment form that cannot be changed without the waiving spouse’s further consent, and the spouse’s signature must be witnessed by a plan representative or notary public.2Office of the Law Revision Counsel. United States Code Title 29 – Section 1055 Requirement of Joint and Survivor Annuity and Preretirement Survivor Annuity The waiver must also be submitted to the plan during the applicable election period.3Internal Revenue Service. Retirement Topics – Getting Married and/or Having Children A retirement waiver clause buried in the postnup, without the separate plan paperwork, won’t actually waive anything.
Watch for Hidden Tax Costs in Property Transfers
If the postnup contemplates transferring property between you — during the marriage or as part of a future divorce — federal tax law generally treats those transfers as tax-free. No gain or loss is recognized, and the recipient takes over the transferor’s original tax basis in the property.4Office of the Law Revision Counsel. United States Code Title 26 – Section 1041 Transfers of Property Between Spouses or Incident to the Divorce
The basis carryover is the piece people miss. Say your husband transfers you an investment property purchased for $200,000 that is now worth $500,000. You owe nothing at the time of transfer. But when you eventually sell it, your taxable gain is calculated from the original $200,000 basis, not the $500,000 you received. A postnup that gives you “the house” can look generous on paper while handing you a sizeable future tax bill. Any proposed property transfer should be reviewed by your attorney alongside a tax advisor.
What Happens If You Don’t Sign
You need to know what the alternative looks like, because that is the benchmark for whether any proposed postnup is actually a good deal.
Nine states — Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, and Wisconsin — use a community property system. In those states, most assets and debts acquired during the marriage belong to both spouses equally, regardless of whose name is on the account. The traditional approach splits everything 50/50, though some community property states let judges adjust the division for fairness.
The remaining states follow equitable distribution, where courts divide marital property based on what is fair under the circumstances. Fair doesn’t necessarily mean equal. Judges weigh each spouse’s income, earning potential, contributions to the marriage (including homemaking), the length of the marriage, and each spouse’s financial needs going forward.
Run the numbers both ways. If you live in a community property state and your husband earns most of the income, a postnup that departs from a 50/50 split could leave you worse off than doing nothing. In an equitable distribution state, the outcome in court is less predictable, and a well-negotiated postnup might actually give you more certainty. Your attorney can model what you’d likely receive under your state’s default rules and compare that to the proposed terms.
How to Respond
Hire Your Own Attorney First
This is the single decision that most determines the outcome. A family law attorney experienced with postnuptial agreements can review the terms, flag provisions that are unfair or unenforceable, and negotiate on your behalf. Expect fees somewhere in the range of $400 to $1,000 or more depending on the complexity of your finances and where you live. That cost is modest compared to the exposure of signing a bad agreement.
Compile Your Own Financial Records
Don’t rely only on your husband’s disclosure. Gather your own: tax returns, pay stubs, bank and investment statements, property deeds, loan documents, retirement account summaries. This gives you a baseline for verifying that what he’s disclosed is complete.
Take Your Time
You are not obligated to respond on anyone else’s timeline. A postnup negotiated over weeks or months, with both parties fully informed and independently advised, is the kind courts enforce. One signed under a deadline imposed by the other spouse is the kind they don’t. If your husband frames this as urgent, that urgency is itself worth raising with your attorney.
Negotiate the Terms
Everything in a postnup is negotiable. If a provision doesn’t work for you, propose an alternative. Ask your attorney about sunset clauses, which cause the agreement to expire after a set number of years unless both spouses agree to renew. A sunset clause makes the postnup feel less permanent and allows terms to be revisited as circumstances change. You can also negotiate for specific protections like guaranteed minimum support levels, retention of certain assets, or conditions that trigger a renegotiation.
Pay Attention to the Tone
A postnup request doesn’t have to be adversarial. Plenty of couples use the process to get on the same page about money in ways they never managed through casual conversation. But tone matters. A spouse who says “let’s each get lawyers and work through this” is in a different category from one who says “sign this or I’m filing.” If the request feels coercive, your attorney needs to know, both for negotiation strategy and because it can affect whether the agreement is enforceable later.