Prenups: produce it a week before the wedding and a court may hold it invalid outright
The most common way a prenuptial agreement fails isn't badly drafted terms, it's signing at the wrong time.
The timing is the validity
Produce the agreement a week before the wedding and ask your partner to sign, and a court may find it signed under duress and therefore invalid.
The reasoning is blunt: by then the invitations are out, guests have booked flights, and the venue deposit is paid. The pressure of "sign or we cancel the wedding" is real, and consent given under it isn't necessarily consent a court will honor.
Sign at least 30 days before the weddingAnd the earlier, the better. Ideally after the engagement and before you start spending money, while both parties still have real room to say no.
Requirements for validity (which vary by state)
The common ones:
- In writingAn oral agreement does not count.
- Both parties voluntaryThis goes back to the timing issue mentioned above.
- Full financial disclosureConcealing assets will bring the whole agreement down.
- Independent counsel for each partySharing a single lawyer is a common reason for an agreement to be ruled invalid.
- Not unconscionable(unconscionable): extremely one-sided terms that courts may simply refuse to enforce.
These requirements differ from state to state; go by the law of the state you expect to apply.
"Separate lawyers" isn't a formality
Plenty of people try to share one lawyer to save money, or have one side's lawyer "take a quick look" for the other. That's the arrangement most likely to get an agreement overturned later.
Typical cost is $1,500 to $5,000 (both parties' lawyers combined). That money buys more than a document; it buys the document holding up later. Save it and render the agreement invalid, and you bought nothing.
Who should particularly consider one
- Anyone with pre-marital assetsThings like real estate, investments, and savings.
- Anyone with a family businessPay extra attention to this one, because it affects more than just the two of you, pulling in other shareholders and family members as well.
- Anyone with children from a prior marriageThe main point is ensuring future inheritance arrangements do not easily get overturned.
- Anyone where one party carries large debtsThis includes student loans too.
If you're both starting out with few assets, a prenup genuinely isn't necessary. But if any of the above applies, it isn't a question of trusting your partner, it's basic finance.
How this relates to community property states
Which state you live in heavily affects how necessary a prenup is. In community property states (Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington and Wisconsin) post-marital earnings are generally half each; other states follow equitable distribution (see item 73 of the checklist).
Moving between states changes which rules apply. A prenup locks things in place regardless of where you live, which is its real value for families on the move.
How to raise it
This is the genuinely hard part, and no technique removes the awkwardness entirely. Two practical approaches:
- Fold it into the financial conversation rather than raising it aloneOnce engaged, you need to talk about money anyway, like who pays for the wedding, how accounts work, and how debts are handled. A prenup is just part of that conversation.
- Make clear it protects both of youA fair agreement clearly sets out rights for both people, rather than serving as a one-sided defense weapon.
In one line
If you are going to sign, do it early, ideally after engagement and before spending begins. Separate lawyers and full financial disclosure are required, and missing any of these three can void the agreement.
Already married: the postnuptial agreement
A prenup can only be signed before the wedding. The equivalent tool for people who are already married is a postnuptial agreement, and it can cover the same ground: how premarital assets are identified, how marital income is divided, and how one spouse's business equity is treated.
Postnuptial agreements are recognized across US states, but the requirements and the standard of review vary by state. One difference from a prenup is consistent: courts generally scrutinize postnups more closely.
The reason is status. While engaged, the two people are still legally separate parties who can bargain freely. Once married, spouses owe each other a fiduciary duty: they must act in each other's interest and disclose assets and debts fully and honestly. An agreement signed under that duty gets a harder look for whether one side was taken advantage of.
California states the standard plainly: spouses owe each other a duty of the highest good faith and fair dealing, neither may take unfair advantage of the other, and each must give the other complete and truthful information about all assets and debts.
Three practical points:
- Separate lawyers matter more here, not less. Sharing one lawyer is already a common reason prenups get thrown out. Under stricter review it holds up even less well.
- Timing still matters. Signing after the relationship is already in trouble, or once divorce is being discussed, carries a much higher risk of being set aside than signing while things are stable.
- Use a family lawyer in your own state. State-to-state variation is wider here than for prenups.
When your spouse is part of the business
This is the situation that gets overlooked most often and costs the most: one spouse founds the company, and the other is an early employee, a co-operator, or an unpaid contributor over many years.
The intuition is "I started the company before we married, so it is mine." That reasoning is incomplete, because two things have to be separated: the business as an asset, and the value the business gained during the marriage.
That gain usually comes from labor contributed during the marriage, capital put in from marital funds, and the spouse's own actual contribution. In many states those are treated the same way as income earned during the marriage.
If this describes you, the time to handle it is while there is no dispute, not after one starts. Concretely:
- Put the spouse's role in the company into a written employment or consulting agreement rather than leaving it as informal help
- Keep written records of ownership and every equity change, with the basis for valuation
- Record the amount and date of any marital funds put into the business
- Write the ownership of the business, and the method for calculating its appreciation, directly into the prenup or postnup
These are basic corporate housekeeping in their own right. They are not only useful in a divorce.