Almost nobody enjoys bringing this up. Asking for a prenuptial agreement feels like announcing you’ve already planned the exit, and most people who call me about one have been putting off the conversation for weeks. So I’ll say the useful part first. A prenuptial agreement is a property document. It decides what belongs to whom and what happens to it later. It is not a prediction, and in Texas it is considerably narrower than people assume.
Here’s what Chapter 4 of the Texas Family Code actually allows, what it refuses to let you touch, and why these agreements are so hard to undo once signed.
What Texas lets you put in one
Under Texas Family Code section 4.003, you and your future spouse can agree about:
- Each person’s rights and obligations in property either of you owns now or acquires later, wherever that property sits.
- How property can be bought, sold, used, leased, or managed during the marriage.
- What happens to property on separation, divorce, death, or another event you name.
- Spousal support, including modifying or eliminating it.
- Ownership of a life insurance policy and the rights to its death benefit.
- Making a will or trust to carry out the agreement.
- Which state’s law governs the agreement.
That last category is broader than it sounds. The statute allows almost any other matter as well, including personal rights and obligations, as long as it doesn’t violate public policy or a statute imposing a criminal penalty.
What a prenup cannot do
This is the part worth reading twice, because it is where expectations and the law part company.
It cannot adversely affect a child’s right to support. Section 4.003 says so directly. You can sign whatever you like about child support and a court will disregard it. Support belongs to the child, not to the two adults negotiating.
It cannot settle custody in advance. Conservatorship, which is the legal term for a parent’s rights and duties, and possession and access, which is the schedule, are decided on the child’s best interest at the time the question comes up. A judge is not bound by what two people agreed before that child existed.
It cannot be changed on a handshake. Under section 4.005, once you’re married the agreement can be amended or revoked only by a written agreement signed by both of you. Years of behaving as though a term no longer applies does not retire it. I have watched couples operate for a decade on an understanding that was never written down, and the written document is the one that governs.
It does nothing until you marry. Section 4.004 is short and absolute. A premarital agreement becomes effective on marriage. If the wedding doesn’t happen, neither does the agreement.
The formalities are simple, which surprises people
Section 4.002 requires only that the agreement be in writing and signed by both parties. No consideration is required, meaning neither of you has to give the other anything of value to make it binding. There is no notary requirement in the statute, no witness requirement, and no waiting period.
The low bar to create one is exactly why the next section matters so much.
Setting one aside is harder than most people expect
Texas gives you two grounds, and only two, under section 4.006. The person resisting the agreement has to prove one of them.
The first is that they did not sign voluntarily.
The second is harder. The agreement must have been unconscionable when it was signed, and before signing, that person must also show all three of the following: they were not given a fair and reasonable disclosure of the other party’s property and financial obligations, they did not knowingly and expressly waive further disclosure in writing, and they did not have and could not reasonably have obtained adequate knowledge of the other party’s finances. Those three are joined by “and,” not “or.” Missing one of them is enough to defeat the challenge.
Whether an agreement is unconscionable is decided by the court as a matter of law, not by a jury. And section 4.006 says its remedies and defenses are exclusive, which closes off the common law arguments people often expect to fall back on.
The practical translation is that a Texas prenup is durable. That cuts both ways. It means a carefully built agreement will probably hold. It also means you should not sign one assuming you can argue your way out later.
What that means for how you build one
Because disclosure sits at the center of the only real challenge, the disclosure is the work. A complete schedule of assets, debts, income, and business interests attached to the agreement does more to protect it than any amount of careful drafting in the body.
Separate counsel for each person matters for the same reason. So does timing. Voluntariness is a question of fact, and the circumstances in which someone signed are part of that picture, so an agreement presented days before the wedding invites an argument that a document signed months earlier does not.
Where one of you owns a business, holds equity, or expects an inheritance, this is also where the financial and legal sides have to talk to each other. Our firm keeps civil and business counsel in house, so the valuation and entity questions get handled alongside the family law drafting rather than referred out and reassembled later. You can read more about our work on prenuptial agreements for couples in Collin, Dallas, and Denton counties.
If you’re already engaged and the date is close, say so at the start rather than at the end. It changes what we can responsibly do, and there is usually still a version that works.