Is a prenuptial agreement permitted for a Catholic marriage? A prenuptial agreement typically outlines what happens in the event a marriage ends in divorce or some other dissolution of the marriage. This at first appears to be at odds with the idea of a Catholic marriage being two people vowing to be married "till death do us part" (i.e. they are still married even if they are civilly divorced).

Is a prenuptial agreement permitted for a Catholic marriage? I'm particularly wondering if a prenuptial agreement would be used as grounds for annulment, since it might suggest that they weren't serious about their marriage vows.
No.
From the perspective of God and the Church, a validly contracted marriage is indissoluble, &quot;till death do us part.&quot;
There can be conditions attached to the marriage contract (conditional marriages); however,

Can.  1102 §1. A marriage subject to a condition about the future cannot be contracted validly.
§2. A marriage entered into subject to a condition about the past or the present is valid or not insofar as that which is subject to the condition exists or not.
§3. The condition mentioned in §2, however, cannot be placed licitly without the written permission of the local ordinary.

§1 thus forbids contracts like: &quot;I marry you provided we cease having children 1 decade from now.&quot; etc.
The 1917 Code can. 1092, which permitted future conditions, explicitly specified that a contract &quot;against the substance of marriage&quot; (such as divorce) &quot;renders [marriage] invalid.&quot;
cf.• commentary on 1983 can. 1102 / Dom Augustine's commentary on 1917 can. 1092• Chapter 9 on pre-marital agreements of Ford, S.J.'s Validity of Virginal Marriage