Prenuptial Agreements and Estate Planning: The Risk of Misalignment

Prenuptial agreements and estate plans are often drafted at different times, under different circumstances, and, in some cases, with different counsel. When these documents are not carefully coordinated, the result can be internal inconsistency that undermines both.

A prenuptial agreement may address waiver of elective share rights, define separate and marital property, and establish expectations regarding inheritance. An estate plan, by contrast, governs the actual disposition of assets at death. When these two frameworks diverge—even subtly—the consequences can be significant.

Courts are frequently asked to reconcile these documents, particularly where a surviving spouse asserts rights that appear inconsistent with the parties’ earlier agreement. In such cases, the analysis turns not only on the language of the agreement but also on whether the estate plan reflects—or contradicts—that understanding.

The issue is not enforceability in the abstract but alignment in practice.

A well-drafted prenuptial agreement should inform the structure of the estate plan. If spousal rights are waived or modified, the estate plan must be constructed with that waiver in mind. Conversely, if the estate plan contemplates benefits for a spouse, those provisions should be consistent with, and not inadvertently undermine, the agreement.

The failure to coordinate these documents is rarely intentional. It is, more often, a function of timing or compartmentalization. But the effect is the same: uncertainty at precisely the moment when clarity is most needed.

Proper planning treats these instruments as parts of a single framework, not separate exercises.