What Is a Postnuptial Agreement (and Why You Might Need One)

Most people have heard of a prenup—an agreement made before marriage that lays out how assets and debts will be handled if the relationship ends. But what about couples who are already married? That's where a postnuptial agreement comes in.

A postnuptial agreement (or “postnup”) is a legally binding contract created after a couple is married. It serves a similar purpose to a prenup: clarifying how finances, property, and debts will be managed during the marriage and divided in the event of separation or death.

Couples decide to sign postnups for all kinds of reasons. Maybe one spouse received a large inheritance, launched a new business, or took on significant debt. Others might use a postnup as part of rebuilding trust after a rough patch in the marriage. And for blended families, a postnuptial agreement can help ensure that children from a previous relationship are protected financially without causing conflict in the current marriage.

No matter the reason, a postnuptial agreement can have a major impact—especially when it comes to your estate plan and long-term financial security.

Are Postnuptial Agreements Enforceable in Vermont?

Yes—but only if certain legal requirements are met. In Vermont, courts will uphold a postnuptial agreement if it's fair, transparent, and voluntary. That means:

• Both spouses entered into it willingly (without pressure or coercion).

• Each spouse fully disclosed their financial situation.

• The agreement doesn't contain terms that are extremely one-sided or unfair.

Because postnuptial agreements can have serious legal consequences, it's important that each spouse has their own attorney to review and negotiate the terms. That extra step can make the difference between a valid, enforceable agreement and one that doesn't hold up in court.

Why It's Crucial to Align Your Postnuptial Agreement with Your Estate Plan

This is where many people run into trouble. Your postnuptial agreement and your estate plan (things like your Will, trusts, and beneficiary designations) need to work together. If they don't, you could unintentionally create confusion—or even conflict—among your heirs.

Here's an example: Your Will might say that your vacation home should go to your children, but your postnuptial agreement could classify that property as jointly owned. Under Vermont law, your spouse might then have a legal claim to it, even if that wasn't your intent.

The best practice? Every time you sign or update a postnuptial agreement, review your estate documents to make sure they're in sync.

How a Postnuptial Agreement Fits into Estate Planning

When properly drafted, a postnuptial agreement can strengthen your estate plan by clearly defining:

• Which assets are separate vs. joint. For example, you might want to keep an inherited property separate from marital assets.

• Who's responsible for debts and obligations.

• How property will be divided if one spouse passes away.

For blended families, this can be especially valuable. A postnuptial agreement can ensure that children from previous marriages receive what you intend for them—while still providing for your current spouse.

Under Vermont law, a surviving spouse has certain automatic rights to a share of an estate. But those rights can be waived through a postnuptial agreement. Depending on your wishes, that agreement can:

• Direct specific assets to your children or other beneficiaries.

• Waive a spouse's claim to particular property or accounts.

• Clarify trust or beneficiary arrangements.

• Waive the right to act as executor or receive property through probate.

The Bottom Line

A postnuptial agreement isn't just a backup plan—it's a proactive step to protect your assets, reduce uncertainty, and make sure your estate plan truly reflects your intentions.

If you're considering one, consult with an experienced family law or estate planning attorney. They can help you create an agreement that's fair, enforceable, and aligned with your long-term goals—giving both you and your spouse peace of mind for the future.