What Do People Commonly Get Wrong About Prenuptial Agreements?
A wedding is being planned, someone brings up a prenup, and suddenly the room fills with secondhand opinions about what these agreements can and can’t actually do.
In a nutshell
Several common beliefs about prenuptial agreements don’t hold up under closer examination, particularly the idea that they can control child custody decisions or that a signed prenup is automatically unbreakable. Courts generally retain authority over anything involving a minor child regardless of what a prenup states, and a judge can set aside all or part of an agreement if it was signed unfairly or doesn’t meet a state’s legal requirements.
Myth: a prenup can decide custody or child support
Courts consistently treat decisions about a child’s custody and support as something only a judge can determine at the time those issues arise, based on the child’s best interests at that point, not something a couple can lock in years earlier through a private agreement. Provisions attempting to set custody terms in advance are typically unenforceable even if both parties signed them willingly.
Myth: once signed, a prenup can never be challenged
A prenup isn’t automatically bulletproof. Courts can decline to enforce all or part of an agreement if it wasn’t entered into voluntarily, if one party didn’t have a fair opportunity to review it with independent legal counsel, or if financial disclosures were incomplete or misleading at signing. The specific standards a court applies vary by state, which is part of why professional legal guidance during drafting matters more than the document’s existence alone.
Myth: prenups are only for people with significant wealth
Couples without substantial individual assets still sometimes choose a prenup, often to address things like how to handle debt brought into the marriage or how a small business would be treated, rather than to protect a large estate. Couples without much money pursuing a prenup tend to be focused less on dividing wealth and more on setting clear expectations early.
Myth: bringing it up signals a lack of trust
Discussing a prenup is sometimes framed as pessimistic, but many couples treat it as an extension of the broader financial conversations that come with combining a life together, including how to handle a joint account before moving in or being upfront about debt brought into the relationship. Approaching it as one part of a larger financial conversation, rather than an isolated and loaded topic, tends to make the discussion more productive.
Myth: a prenup makes other financial paperwork unnecessary
Signing a prenup doesn’t automatically update beneficiary designations, account titling, or other records that require separate action, such as updating names on financial accounts after a legal name change. The agreement addresses how assets would be treated in specific circumstances, but it doesn’t substitute for the administrative steps a marriage otherwise requires.
Separating fact from fiction
Prenuptial agreements are governed by state law and reviewed by courts, which means they can’t override child-related decisions and aren’t automatically immune to challenge, contrary to some common assumptions. Understanding what a prenup can and can’t actually do, and how state-specific rules shape its enforceability, is a more useful starting point than relying on generalizations often repeated secondhand.