Texas Family Code § 4.006 gives a challenger only two ways out of a premarital agreement — and closes off every other one. Understanding those two grounds is how good agreements get drafted.
Bustos Family Law PLLC | Austin, Texas
A premarital agreement is only worth what a court will enforce. The good news for couples signing one in Texas is that the statute is unusually favorable to enforcement. The narrower news is that the two available escape hatches are precisely the ones a rushed, one-sided signing process tends to open.
Texas law starts on your side
Texas Family Code § 4.006(a) places the entire burden on the party resisting enforcement: an agreement “is not enforceable if the party against whom enforcement is requested proves” one of two things. There is no burden on the spouse seeking enforcement to establish validity in the first instance.
Texas appellate courts have applied that allocation consistently. In Marsh v. Marsh, 949 S.W.2d 734 (Tex. App.—Houston [14th Dist.] 1997, no writ), the court rejected each of the challenger’s attacks, holding that signing shortly before the wedding “does not make the agreement unconscionable” where the terms had been discussed previously, and that the challenger’s lack of independent counsel “is not dispositive.”
Just as important, § 4.006(c) provides that the remedies and defenses in the section are “the exclusive remedies or defenses, including common law remedies or defenses.” The Austin Court of Appeals confirmed the effect of the parallel provision in Sheshunoff v. Sheshunoff, 172 S.W.3d 686 (Tex. App.—Austin 2005, pet. denied): a disappointed spouse cannot plead around the statute with common-law fraud or duress claims.
Ground one: the agreement was not signed voluntarily
The Family Code does not define “voluntarily.” Texas courts have supplied the meaning: an action taken intentionally or by the free exercise of one’s will, assessed on the circumstances and their mental effect on the signing party. Martin v. Martin, No. 05-07-01571-CV (Tex. App.—Dallas Apr. 13, 2009). No separate showing of common-law fraud or duress is required. Sheshunoff, 172 S.W.3d 686.
Two cases mark the boundaries. In Moore v. Moore, 383 S.W.3d 190 (Tex. App.—Dallas 2012), the agreement was held unenforceable. The document was presented to the bride hours before the ceremony in Martha’s Vineyard; the final draft omitted asset values her attorney had requested; the groom falsely told her that her own lawyer had approved it; and the groom had selected and paid for that lawyer. In Izzo v. Izzo, No. 03-09-00395-CV (Tex. App.—Austin May 14, 2010, mem. op.), our own Third Court of Appeals invalidated a marital property agreement where the wife signed after her husband threatened to end the marriage, applying a totality-of-the-circumstances test that weighed undue influence, unequal bargaining power, and her lack of understanding of the agreement’s effect.
On the other side, Sheshunoff enforced an agreement where both parties were sophisticated, represented by counsel, and had negotiated extensively with professional advisors. The pattern across the cases is not about the calendar alone — it is about whether the signing spouse had real information, real advice, and a real ability to say no.
Ground two: unconscionable and undisclosed
The second ground is conjunctive, and its structure is frequently misread. Under § 4.006(a)(2), the agreement fails only if the challenger proves it was unconscionable when signed and that, before signing, that party:
- (A) was not provided a fair and reasonable disclosure of the other party’s property or financial obligations;
- (B) did not voluntarily and expressly waive, in writing, any right to disclosure beyond what was provided; and
- (C) did not have, and could not reasonably have had, adequate knowledge of the other party’s property or financial obligations.
All three subparts must be established, on top of unconscionability itself. The Austin court set out this three-element structure in Sheshunoff. Defeating any single element defeats the challenge — which is why disclosure practices matter so much more than most couples assume.
Note also § 4.006(b): an issue of unconscionability “shall be decided by the court as a matter of law.” It is a question for the judge, not the jury. See also Pletcher v. Goetz, Nos. 2-98-179-CV & 2-98-201-CV (Tex. App.—Fort Worth Dec. 16, 1999).
Five practices that make an agreement durable
- Start sixty to ninety days out. There is no statutory waiting period, and Marsh confirms that late signing is not automatically fatal. But showing evidence that you and your fiancé have discussed and worked on your prenup in advance is evidence of voluntary signing.
- Attach real schedules. A complete list of assets, debts, and income for each party, incorporated as exhibits, is the single most effective answer to a § 4.006(a)(2) challenge.
- Include the written disclosure waiver anyway. Even with full schedules, the express written waiver contemplated by § 4.006(a)(2)(B) is worth including as a backstop.
- Say what you mean, item by item. Courts construe these agreements narrowly in favor of the community estate and will not add language. Jimenez v. Jimenez, No. 01-23-00087-CV (Tex. App.—Houston [1st Dist.] Apr. 22, 2025).
- Respect the formalities — then and later. Writing and both signatures under § 4.002 (Ruiz v. Ruiz, No. 04-16-00016-CV (Tex. App.—San Antonio Dec. 28, 2016)), and written amendments only under § 4.005.
Two provisions worth knowing about
If a marriage is later determined to be void, § 4.007 provides that what would have been a premarital agreement is enforceable “only to the extent necessary to avoid an inequitable result.”
And under § 4.008, limitations on a claim for relief under a premarital agreement are tolled during the marriage — but the second sentence preserves equitable defenses including laches and estoppel. Tolled does not mean unlimited.
Texas has been enforcing these agreements for decades; the Texas Supreme Court validated the modern framework in Beck v. Beck, 814 S.W.2d 745 (Tex. 1991). An agreement drafted with attention to § 4.006 is very likely to be enforced. One drafted the week of the wedding, without schedules and without separate counsel, is the one we see litigated.
If you would like your agreement drafted — or an existing one reviewed — with these standards in mind, our firm is here to help. Schedule a consultation with Bustos Family Law PLLC.
Authorities Cited in This Post
Every link below was verified to resolve to the cited authority. Statutory links go to public.law; case links go to Justia, FindLaw, CourtListener, or the Texas courts website.
- Texas Family Code § 4.006 — texas.public.law
- Texas Family Code § 4.007 — texas.public.law
- Texas Family Code § 4.008 — texas.public.law
- Marsh v. Marsh, 949 S.W.2d 734 (Tex. App.—Houston [14th Dist.] 1997, no writ) — findlaw.com
- Sheshunoff v. Sheshunoff, 172 S.W.3d 686 (Tex. App.—Austin 2005, pet. denied) — justia.com
- Martin v. Martin, No. 05-07-01571-CV (Tex. App.—Dallas Apr. 13, 2009) — justia.com
- Moore v. Moore, 383 S.W.3d 190 (Tex. App.—Dallas 2012) — findlaw.com
- Izzo v. Izzo, No. 03-09-00395-CV (Tex. App.—Austin May 14, 2010, mem. op.) — justia.com
- Pletcher v. Goetz, Nos. 2-98-179-CV & 2-98-201-CV (Tex. App.—Fort Worth Dec. 16, 1999) — findlaw.com
- Jimenez v. Jimenez, No. 01-23-00087-CV (Tex. App.—Houston [1st Dist.] Apr. 22, 2025) — justia.com
- Ruiz v. Ruiz, No. 04-16-00016-CV (Tex. App.—San Antonio Dec. 28, 2016) — findlaw.com
- Beck v. Beck, 814 S.W.2d 745 (Tex. 1991) — courtlistener.com
This article is provided for general educational purposes by Bustos Family Law PLLC and is not legal advice. Reading it does not create an attorney-client relationship. Texas marital property law is fact-specific, and statutes and case law change. Please consult a licensed Texas attorney about your own circumstances.