Prenuptial agreements in Texas let two people decide, before the wedding, how their property and income will be treated during the marriage and if it ends. Chapter 4 of the Family Code sets the rules. This page covers what an agreement can include, when a court will not enforce one, and agreements signed after marriage.
A prenuptial agreement in Texas is a written contract between two people who plan to marry, made in contemplation of the marriage and effective only once they marry. The Family Code calls it a premarital agreement. Texas adopted the Uniform Premarital Agreement Act as Subchapter A of Chapter 4, beginning at Section 4.001.
The formal requirements are short. Under Section 4.002, the contract has to be a written document carrying the signatures of both future spouses. No consideration is needed for it to bind them, so neither person has to hand over money or anything else of value to make the deal stick. Under Section 4.004, the agreement takes effect on the wedding day. If the wedding never happens, the agreement never takes effect.
Section 4.003 of the Texas Family Code gives a couple broad room to settle, in advance, who owns what and what becomes of it if they separate, divorce or one of them dies. The same section reaches spousal support and life insurance proceeds.
One limit is absolute. Section 4.003(b) keeps a premarital agreement from reducing the support a child is owed. Child support is set under its own rules, whatever the parents signed before the wedding.
Under Texas Family Code Section 4.006, a court sets a premarital agreement aside only when the spouse attacking it proves one of two things: the signature was not voluntary, or the terms were unconscionable at signing and that spouse was also kept from a fair picture of the other person's finances. The challenging spouse carries the burden of proof.
| Defense | What the challenging spouse must prove |
|---|---|
| Involuntary signature | The spouse did not sign the agreement voluntarily. |
| Unconscionable without disclosure | The terms were unconscionable on the day of signing, and beforehand the spouse (1) was not given fair, reasonable information about the other person's property and financial obligations, (2) did not voluntarily and expressly waive further disclosure in writing, and (3) did not have, and reasonably could not have had, adequate knowledge of those finances. |
Unconscionability is decided by the judge as a matter of law, not by a jury, and the defenses in Section 4.006 are the only defenses available. The statute focuses on voluntariness and financial disclosure. It does not set a signing deadline before the wedding and does not require each person to hire a separate attorney, so whether those steps make sense for a particular couple is a question to raise at a first appointment.
Texas Family Code Section 4.005 allows a premarital agreement to be amended or revoked after the marriage only by a written agreement signed by both spouses. Like the original, the amendment or revocation is enforceable without consideration. A spoken promise to tear up the agreement does not change it.
Couples who are already married can sign what is often called a postnuptial agreement. Texas Family Code Chapter 4, Subchapter B, lets spouses split or swap community property so it becomes separate property, and to agree that income from separate property stays separate. Subchapter C allows the reverse: converting separate property into community property.
A marital property agreement matters most when a marriage ends. It can change which property counts as separate in a divorce, limit or waive claims between the marital estates, and address spousal support, while child support stays protected by statute.
Couples in Conroe and Sugar Land can find local information on those pages, and the Montgomery County family courts page explains where Montgomery County divorces are heard if an agreement is ever tested.
Upholding them is the default: under Section 4.002, a premarital agreement binds the couple once it is put in writing and signed, with no payment or other value required. A court will refuse to enforce it only if the challenging spouse proves one of the two defenses in Section 4.006: an involuntary signature, or an unconscionable agreement signed without fair financial disclosure.
It does not. Section 4.003(b) puts a child's support beyond the reach of any premarital agreement. Any child support is set under the Family Code's support rules, regardless of the agreement.
It can. Section 4.003(a)(4) lets future spouses change or waive spousal support in advance. How such a provision applies in a particular divorce depends on its wording and the facts.
Yes. Chapter 4, Subchapter B, lets married spouses divide community property so it becomes separate property, or agree that income from separate property stays separate, at any point in the marriage. Each of these agreements has to be a writing that both spouses sign.
Yes, but only in writing. Section 4.005 allows a premarital agreement to be amended or revoked after marriage by a written agreement signed by both spouses, and no exchange of value is needed.
Last reviewed: November 8, 2026. Statute sections on this page were checked against the Texas Family Code on the Texas Legislature website on November 7, 2026.
Whether you are drafting an agreement before a wedding or reviewing one you were asked to sign, Jessica Fritz can explain what Chapter 4 requires. Call the office or send a message to set up a first appointment in Conroe.
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