Inheritance usually starts out as your separate property — the problem is that ordinary married life quietly converts it into shared property, one joint deposit at a time. A prenup stops the clock. Here's how the protection works, and the mistakes that defeat it.
Mostly, at first: nearly every state treats inheritance as separate property — but that protection erodes through commingling, and proving what's left of it is your burden, years later.
It's true that inheritances (and gifts made to one spouse) start out as separate property almost everywhere, even in community-property states. So why does anyone need a prenup for this? Because the default protection is fragile in three specific ways.
First, commingling: mix inherited money with marital money — deposit it in the joint account, put it toward the family home, use it for a renovation — and it can transmute into marital property. Second, appreciation: even a cleanly separate asset's growth during the marriage can become divisible, especially if either spouse's effort contributed to that growth. Third, the burden of proof: if you divorce, you are the one who must trace every dollar of the inheritance through years of accounts and transactions. Records go missing; memories differ; tracing fights are exactly the kind of expensive, ugly litigation people get prenups to avoid.
And in a handful of states, courts have the power to reach even properly separate property when dividing a marriage's assets. The default rules are a decent start — they're just not a plan.
The typical inheritance isn't lost in court — it's lost years earlier, through ordinary decisions that mixed it into the marriage.
The pattern is remarkably consistent. An inheritance arrives — $80,000 from a parent's estate, say. It sits briefly in a personal account, then life happens: it becomes the down payment on a jointly titled house, or it pays off the joint mortgage, or it flows through the joint checking account on the way to somewhere else. Each of those steps felt natural and generous in the moment. Each one also handed the other spouse a claim to it.
By the time a divorce lawyer sees the file, the question isn't 'was this an inheritance?' — everyone agrees it was. The question is whether anything legally separate is left of it, and the answer turns on title, tracing, and state doctrine rather than on what anyone intended. That's the precise gap a prenup closes: it writes the intention down while everyone still agrees on it.
Nobody inherits their grandmother's house planning to split it with an ex. But without paperwork, that's what commingling does — quietly, and usually years before anyone notices.
— Trusted Prenup Editorial Team
The clause designates inheritances and family gifts — past and future, plus their growth — as the receiving spouse's separate property, whatever the default rules would have said.
A well-drafted inheritance provision does four things. It classifies inheritances and family gifts you've already received as your separate property. It does the same for ones you may receive in the future — critical, since most people's inheritances haven't arrived yet when they marry. It extends the protection to appreciation, so the inherited brokerage account's growth stays as separate as its principal. And it sets the rules for what happens if separate funds do get used for shared purposes — for example, a right of reimbursement if inheritance money goes into a jointly owned home.
That last piece deserves emphasis, because a prenup doesn't have to mean living like financial roommates. You can use inherited money for your shared life and keep a documented claim to it — the agreement just makes the terms explicit instead of leaving them to inference. This matters especially for a family business or property expected to pass to you: the agreement can keep it in your family's line entirely, which is often as much your parents' concern as yours.
A prenup protects inheritance if the marriage ends in divorce; a will or trust controls where property goes at death — a complete plan coordinates both.
A prenup is a divorce instrument, not an estate plan. It decides what's yours if the marriage ends while you're both alive. Your will or trust decides where property goes when you die — and marriage changes that picture too, because most states give a surviving spouse an 'elective share': the right to claim a portion of the estate regardless of what the will says. A prenup is one of the few instruments in which spouses can agree to waive or modify those rights, which is why estate lawyers often ask engaged clients whether they have one.
If your family's wealth involves trusts — or a family business with a succession plan — coordinate the prenup with the estate attorney who manages them. The prenup keeps the inheritance out of a divorce; the trust structure governs how it reaches you at all. They're complementary documents, and the strongest protection uses both. What a prenup can and can't reach is covered more broadly in what does a prenup cover.
93% of Trusted Prenup couples keep inheritances separate in their agreement — making it the closest thing to a universal choice in our data.
Some prenup topics split couples down the middle — spousal support famously so. Inheritance isn't one of them. In our questionnaire data, 93% of couples choose to keep inheritances separate. The intuition is shared on both sides of the table: family money is felt to belong to the family line it came from, and neither partner typically expects to claim the other's.
That makes inheritance one of the easiest places to start the prenup conversation — you'll almost certainly agree. Raise it as a mutual protection ('your family's money stays yours, mine stays mine'), and the harder topics get easier from there. Our guide on how to talk to your partner about a prenup is built around exactly that approach.
Disclose what you've received and expect, choose separate-property treatment in the questionnaire, and sign a state-compliant agreement before the wedding.
In the Trusted Prenup questionnaire, inheritance is a dedicated topic: you disclose what you've received and what you reasonably expect, and choose how it should be treated — for nearly everyone, as separate property, growth included. The agreement is assembled to meet your state's formalities, you both review it, and you sign and notarize online. Flat $599.
Two practical notes. Sign well before the wedding — every part of a prenup is stronger with time and daylight, and inheritance clauses are no exception. And after the wedding, honor the structure you built: keep inherited funds in separate accounts where the agreement assumes they'll be. The prenup makes the legal answer clear, but clean habits make it effortless.
Protect inheritances you have — and ones still to come — with a state-specific prenup. Flat $599, done online.
Start Your Prenup →Partially. Most states treat inheritance as separate property by default — but commingling it with marital finances can convert it, its growth during the marriage may be divisible, and you carry the burden of tracing it years later. A prenup replaces that fragile default with a contractual guarantee.
Yes. A prenup can classify future inheritances and family gifts as separate property in advance, including their growth. That's one of its main advantages over relying on default rules, since most people marry before their inheritances arrive.
Commingling is mixing separate property with marital property — depositing an inheritance into a joint account, or using it for a jointly owned home. It can transform separate property into divisible marital property. A prenup can preserve your claim even when funds are used for shared purposes, by making the treatment explicit.
No — they do different jobs. A prenup governs divorce; a will or trust governs death. But a prenup can include waivers of spousal inheritance rights (like the elective share), which is why it should be coordinated with your estate plan rather than written in isolation.
Very. Parents passing down businesses, property, or savings often see the prenup as protecting the family's plan, not doubting the marriage. Some family trusts effectively expect one. It's among the most common and least adversarial reasons couples come to us — and at 93%, keeping inheritance separate is the choice almost every couple makes anyway.
Trusted Prenup is not a law firm and does not provide legal advice. This page is general information about prenuptial agreements and pricing and is not a substitute for advice from a licensed attorney about your situation.