Can a Prenup Address an Inheritance You Expect to Receive?

Why Couples Address Future Inheritance Before Marriage

For engaged couples who expect family wealth, a trust distribution, or a share of a family business, the question comes up early and often: what happens to that inheritance once we're married? It's one of the most common financial conversations couples have before the wedding, and it makes sense. An inheritance usually carries both emotional and financial weight. It might represent a parent's life savings, a business built over decades, or a legacy meant to stay in the family.

Talking about it before marriage lets both partners enter with the same understanding. You're deciding together how a future asset fits into your shared life, and you're doing it when things are calm rather than during a stressful moment years down the road. According to J.P. Morgan Private Bank, it's always wise to make important decisions when things are good, as opposed to in times of crisis. A prenup is one of those decisions.

As Michael C. Cotugno, Esq., Managing Partner, Neptune Legal, puts it: "For conscious partners, wealth is not merely a collection of assets; it's a powerful tool with the potential for profound purpose." Planning for an inheritance together is part of directing that purpose on your own terms, as a partnership.

How Inheritance Is Treated as Separate Property by Default

In most states, an inheritance received by one spouse, whether before or during the marriage, is classified as separate property. That means it belongs to the person who received it and is generally not divided if the marriage ends. This default rule applies in both community property states and equitable distribution states, though the details differ.

California spells this out directly. According to California Family Code Section 770, separate property includes "all property acquired by a married person after marriage by gift, bequest, devise, or descent." In plain terms, that's inheritance. Equitable distribution states, which cover most of the country, reach a similar default: inherited assets stay with the recipient rather than getting split.

Here's the catch. State law varies, and where you live can change over the course of a marriage. J.P. Morgan Private Bank notes that even if the laws where a couple is domiciled at the time of marriage are favorable, ZIP codes change, and the laws of another state may treat the same inheritance differently. A default rule is not the same as a guarantee. It's a starting point that can shift based on geography and, more often, based on how you handle the money.

How an Inheritance Loses Its Separate Status Through Commingling

The most common way a separate inheritance becomes marital property is commingling, which means mixing separate funds with marital funds until the two can't be told apart. This happens more easily than most people expect.

Depositing an inherited check into a joint checking account that pays the mortgage, groceries, and utilities is the textbook example. Within a few months, the inherited dollars are indistinguishable from marital dollars, and tracing them back becomes expensive and sometimes impossible. Most people inherit money fully intending to keep it separate, then life happens. They need cash for a roof repair or a family medical bill, and the boundary quietly dissolves.

Joint purchases create the same issue. If you use inherited funds as a down payment on a home titled in both names, the marital estate may acquire an interest in that property even though the source was your separate inheritance. Once funds are mixed or used for a shared purpose, a court may treat all or part of the inheritance as marital property subject to division.

Appreciation is the detail people overlook most. If an inherited asset grows in value during the marriage, or if a spouse contributes work or money to maintaining it, the growth can create a shared interest even when the original asset stays separate. A family business that increases in value over ten years of marriage is a classic case. Without clear language written down in advance, courts are left to interpret intent, which can turn into a slow and costly dispute.

What a Prenup Can Say About an Inheritance You Have Not Received Yet

You do not need to have the money in hand to address it. A prenup can include a general clause stating that all future inheritances received by either spouse, before or during the marriage, remain the separate property of the recipient, regardless of how they're later handled.

This answers the worry many people have: you don't need to know the amount, the source, or the timing. When someone asked a licensed New York attorney on Avvo how to address an inheritance they might never receive, the guidance was that a general clause can state that all future inheritances to one spouse will be considered that spouse's separate property. The same answer stressed not doing a prenup without an attorney.

A well-drafted clause can go further than the basic separate-property statement. It can address the appreciation of the asset, any income the asset generates (dividends, rent, business profits), and what happens if inherited funds are used for a shared purchase. It can define whether that shared use creates a reimbursement right or simply converts the funds. The point is that the agreement is a contract. It can override the default commingling rules, so even if you later deposit inherited funds into a joint account, the clause gives you a contractual backstop that state law alone can't provide.

Two conditions matter for enforceability. First, both partners need full and fair financial disclosure of assets and debts. Second, independent counsel for each partner is highly recommended for an enforceable prenup. A one-sided agreement drafted without disclosure or representation is far more likely to be challenged later.

Comparing How a Prenup Handles Inheritance Scenarios

The value of explicit language becomes clear when you line up common situations. The table below shows how the same inheritance can play out very differently depending on whether a prenup addresses it. These are general illustrations; outcomes depend on your state and the specific facts.

The pattern is consistent. Default rules give you a fragile starting position that erodes the moment funds move. Explicit language holds regardless of how the money is handled.

How Neptune Helps Couples Plan for Future Inheritance Together

An inheritance clause isn't only a legal question. It's a legal, financial, and tax decision all at once, and those three angles need to line up. How the clause is written affects your estate plan. How the asset is held affects your taxes. How you title future purchases affects both. Handling one piece in isolation is how gaps appear.

Neptune pairs couples with experienced attorneys, CFPs, and CPAs (each with 20+ years of experience) and manages the full process from start to finish. This isn't a DIY template or a marketplace where you're left to coordinate specialists yourself. Along the way, AI-guided education and conversations help both partners understand what the agreement actually says and why, so the plan is something you build together rather than something one person hands the other.

That coordination matters most when a future inheritance ties into a larger picture. Aligning a prenup clause with your broader estate and financial planning means the inheritance provision fits the whole, from how a family trust distributes to how your own estate documents read. The result is clarity: two partners who understand the plan and entered marriage having talked it through. If you expect an inheritance, the time to address it is now, calmly and together, rather than leaving it to default rules and hoping the money never gets mixed.