Your Texas Prenup Is the Foundation of Your Estate Plan — Not a Substitute for It

Oct 1, 2026

A marital agreement answers the question every other estate planning document depends on: what did you actually own? It does not answer who receives it, who manages it, or who speaks for you.

Bustos Family Law PLLC | Austin, Texas

Our firm handles both family law and estate planning, so we regularly meet clients who treat those as unrelated errands. A Texas premarital or marital property agreement is the most consequential estate planning document many couples will ever sign — and, on its own, nowhere near enough.

The distinction is worth stating plainly. A marital agreement decides what you own. A will, a trust, and a beneficiary designation decide who gets it. Clients who stop after the first step often assume the second happened on its own. It did not.

Why characterization matters more in Texas than almost anywhere else

In most common-law states, a surviving spouse unhappy with a will can claim a statutory elective or forced share. Texas has no such right — as Professor Thomas Featherston of Baylor Law School explains, elective share rights “are not granted to surviving spouses in community property states.” Texas protects the survivor through ownership instead: the surviving spouse retains — rather than inherits — their own half of the community estate.

Because there is no percentage backstop, the characterization of each asset as separate or community decides almost everything at death — and a marital agreement is what settles characterization in advance. Texas Family Code § 4.003(a)(1) and (a)(3) let spouses contract about their rights in any property “whenever and wherever acquired” and about the disposition of property on death. The agreement reaches past the marriage, too: under § 3.404(b), a reimbursement claim between marital estates matures on dissolution “or the death of either spouse.”

The statute itself assumes you will also sign a will

This is not our editorial gloss. Section 4.003(a)(5) expressly permits a marital agreement to address “the making of a will, trust, or other arrangement to carry out the provisions of the agreement” — the Legislature drafted Chapter 4 assuming a separate testamentary instrument would follow. Subsection (a)(6) does the same for life insurance: parties may contract about a death benefit, but the contract is not the beneficiary designation. The agreement is the foundation; the Code takes for granted that someone will build the house.

What happens if you stop at the agreement

Consider a second marriage where a carefully drafted prenup confirms the family ranch is separate property, and that spouse dies without a will. Under Texas Estates Code § 201.002(b), a decedent leaving a surviving spouse and children passes only one-third of the separate personal estate to the spouse, who receives merely “a life estate in one-third of the person’s land,” with the remainder going to the children.

The community side is starker. Under § 201.003(c), if the deceased spouse is survived by a child “who is not also a child or other descendant of the surviving spouse,” the decedent’s undivided one-half of the community estate passes to the decedent’s children — not the surviving spouse. The widow and her stepchildren become co-owners of the house she lives in.

In both scenarios the prenup worked exactly as drafted. It characterized the property correctly, then had nothing to say about who receives it — so the statute answered instead. (For how the instruments differ, see Prenup vs. Postnup in Texas.)

Beneficiary designations do not read your prenup

Under Texas Estates Code § 111.052, provisions in insurance policies, retirement accounts and similar instruments directing payment on death are “considered nontestamentary” — they operate outside the will entirely. A marital agreement reciting who should receive a 401(k) does not change the form on file with the plan administrator.

ERISA plans raise a sharper problem. 29 U.S.C. § 1055 permits a married participant’s survivor annuity to be waived only if “the spouse of the participant consents in writing,” witnessed by a plan representative or notary. In Hagwood v. Newton, No. 01-1909 (4th Cir. Feb. 26, 2002), the Fourth Circuit held a premarital waiver failed because when the fiancé signed, “he was not [the participant’s] spouse and therefore could not satisfy the requirement of § 1055(c).” Only an actual spouse can consent.

Our fix is a covenant obligating the prospective spouse to sign the plan’s consent after the wedding, plus a reminder to actually do it. ERISA also preempts state law on plan beneficiary designations, a point addressed in Keen v. Weaver, 121 S.W.3d 721 (Tex. 2003).

Homestead and the family protections cut both ways

Article XVI, Section 52 of the Texas Constitution provides that the homestead “shall not be partitioned among the heirs of the deceased during the lifetime of the surviving husband or wife, or so long as the surviver may elect to use or occupy the same as a homestead.” Estates Code § 102.005 codifies that prohibition and § 102.003 governs how the homestead passes. Texas also sets aside exempt property and allows a family allowance for a year’s maintenance.

Here is what surprises clients on both sides of the table: these rights can be waived in a premarital agreement, and it does not take magic words. In Williams v. Williams, 569 S.W.2d 867 (Tex. 1978), the Texas Supreme Court held that a wife “waived her rights to the probate homestead and exempt property by the premarital agreement in question,” where the agreement said only that each party had “the absolute and unrestricted right to dispose of such separate property, free from any claim that may be made by the other by reason of their marriage.”

A boilerplate waiver clause, in other words, may give away more than a client understood — including the right to stay in the marital home. One caution: Williams addressed homestead and exempt property. Whether the family allowance can be waived is less settled, so we draft that waiver expressly.

Three things a marital agreement structurally cannot do

  1. Create an independent administration. Under Estates Code § 401.001, a testator may direct that no action be had in the probate court beyond probating the will and filing an inventory — but only “in the person’s will.” It is the largest cost saver in Texas probate, and no marital agreement can create it.
  2. Name a guardian for your minor children. Section 1104.053 permits a surviving parent to appoint a guardian “by will or written declaration.” A premarital agreement is neither — and Family Code § 4.003(b) independently bars one from affecting a child’s right to support.
  3. Speak for you while you are living, or state your end-of-life wishes. A statutory durable power of attorney, a medical power of attorney, and a directive to physicians are separately executed instruments in statutorily prescribed form. A durable power of attorney also terminates on divorce from the principal — worth flagging in any family law matter.

The order we recommend

First, the marital agreement, which characterizes property and can also create a right of survivorship — Estates Code § 112.051 lets spouses agree that community property “becomes the property of the surviving spouse,” though § 112.052 warns that survivorship “may not be inferred from the mere fact that an account is a joint account.” Second, wills or trusts disposing of what the agreement characterized. Third, beneficiary designations and ERISA consents aligned with both. Fourth, powers of attorney, directives, and guardian designations — then a review after each marriage, child, business change, or move across state lines.

If you own a company or are marrying with children from a prior relationship, the sequencing matters even more — see Prenups for Business Owners and Blended Families in Texas.

If you signed a marital agreement and never took the next step — or you are about to sign one and want it drafted with the probate consequences in view — our firm handles both halves of that work. 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 relevant court’s website.

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 and probate law is fact-specific, and statutes and case law change. Please consult a licensed Texas attorney about your own circumstances.