Does a prenup expire? It’s one of the most common questions people ask after signing a prenuptial agreement — and one of the most misunderstood. The short answer is no: a prenup does not expire on its own. A prenuptial agreement remains valid and enforceable for the entire duration of your marriage unless you specifically built an expiration date into it, both partners agreed to revoke it, or a court found it invalid for other reasons.
But the longer answer matters, because there is one way a prenup can expire — the sunset clause — and how you handle it can have enormous financial consequences. This guide covers how long a prenup lasts, how sunset clauses work (including the risks most guides ignore), what happens when a prenup does expire, and whether your prenup needs reviewing.
Read: What Makes a Prenup Invalid?
Does a Prenup Expire? The Complete Answer
| Scenario | What happens | Verdict |
| No sunset clause in prenup | Prenup remains valid until divorce or death | Prenup does not expire |
| Sunset clause — 10-year anniversary | Prenup voids automatically on that date | Expires on that date |
| Divorce filed before sunset date but finalized after | Court may rule prenup already expired | High risk of expiration |
| Both partners sign postnuptial agreement | Old prenup replaced by new agreement | Effectively expires |
| Both partners agree to revoke in writing | Prenup voided by mutual consent | Voided |
| Court finds prenup invalid on other grounds | Prenup thrown out regardless of sunset clause | Invalidated |
| Major life change (children, career stop) | Prenup remains valid but may be reviewed for fairness | Still valid — but may need updating |
The table above captures the full picture: a prenup does not expire unless you include a sunset clause or actively revoke it. It activates when you marry and remains in force through the entire marriage — 5 years, 20 years, 50 years — until either the marriage ends by divorce or death, or you take specific steps to modify or revoke it.
How Long Does a Prenup Last Without a Sunset Clause?
Without a sunset clause, a prenup lasts forever — for the entire duration of the marriage. There is no automatic expiration date, no renewal required, and no point at which the agreement simply stops being valid because enough time has passed.
This is true in all 50 states. Whether you’ve been married for three months or thirty years, your prenup is in effect when the marriage ends. Courts don’t apply a ‘freshness’ test or reduce enforcement based on how long ago the prenup was signed.
The agreement activates at the moment of marriage — if you sign a prenup and then never marry, it has no legal effect. Once married, the prenup is live and will govern your financial separation if the marriage ever ends.
What Is a Sunset Clause in a Prenup?
A sunset clause is a provision in a prenuptial agreement that sets an automatic expiration date. When that date arrives, the prenup — or specified provisions within it — automatically becomes void. The marriage continues, but the prenup’s terms no longer apply.
Sunset clauses can be structured in several ways:
- Full expiration — the entire prenup voids on a specific anniversary (e.g., the 10th or 15th wedding anniversary)
- Partial expiration — specific clauses expire while others remain (e.g., an alimony waiver expires after 5 years, but property division terms remain permanent)
- Event-based expiration — the prenup expires upon a specified event, such as the birth of a child or when one partner pays off a named debt
- Phase-in clauses — more assets become jointly owned with each passing year of marriage
| Celebrity Example Beyoncé and Jay-Z reportedly include a sunset clause in their prenup: she earns $1 million extra from the estate for each year of marriage, but the agreement expires after 15 years. This is one of the most publicly discussed examples of a prenup sunset clause. |
Why Do Couples Include Sunset Clauses?
Sunset clauses are most commonly used in three situations:
1. As a compromise when one partner resists the prenup
If one partner is reluctant to sign, a sunset clause can make the prenup more palatable: it protects assets early in the marriage when financial risk is highest, but eventually ‘goes away’ after the relationship has proven itself. This is genuinely useful — but it comes with risks discussed below.
2. When the reason for the prenup is temporary
If the primary purpose of the prenup was to protect one partner’s premarital debt until it’s paid off, or to protect one partner’s assets until a business reaches a certain milestone, a sunset clause that expires when the triggering condition resolves makes logical sense.
3. To reflect evolving financial equality
Some couples expect their financial situations to equalize over time — one partner currently earns much more but expects the other to catch up. A sunset clause can reflect the expectation that the financial imbalance motivating the prenup will resolve itself.
The Hidden Risks of Sunset Clauses Most Guides Don’t Cover
Sunset clauses are more popular than they are wise, and the risks are rarely discussed as honestly as they should be. Here’s what most online prenup vs. sunset clause discussions skip:
Risk 1: Divorce filed just before the sunset date
This is the scenario that has appeared in actual court cases — and it’s the clearest illustration of why sunset clause language matters enormously. Imagine a sunset clause that voids the prenup after 15 years of marriage. The couple separates at 14 years and 10 months. The divorce takes 9 months to finalize. Technically, they were still married on their 15th anniversary.
Courts have ruled — in exactly this type of case — that because the parties were still legally married at the anniversary date, the sunset clause activated and the prenup was void. The partner who wanted the prenup enforced lost. The lesson: if you include a sunset clause, the language must specify exactly what ‘expiration’ means — does it trigger at the date of separation? At the date of filing? At the date of the final decree? Vague language in a sunset clause is a litigation landmine.
Risk 2: Sunset clauses don’t disappear cleanly
Many couples think of a sunset clause as the prenup simply ‘going away.’ What actually happens is that when the prenup expires, your state’s default divorce laws immediately apply — the same laws the prenup was designed to override. In community property states, that means a 50/50 division of everything accumulated during the marriage. In equitable distribution states, it means a judge has broad discretion over everything.
If you’ve accumulated significant assets during a 15-year marriage, the difference between the prenup’s terms and default state law can be substantial.
Risk 3: Sunset clauses affect more than you realize
Many couples include sunset clauses to make an alimony waiver time-limited — ‘if we divorce after 10 years, you get alimony.’ But if the sunset clause expires, the entire prenup, rather than just that provision, may also void business protection clauses, inheritance protection, and debt allocation terms that were never intended to expire.
Precision in sunset clause drafting — specifying exactly which provisions expire and which remain — is critical and requires experienced legal counsel.
| Our Assessment Most couples who include sunset clauses are making a gesture of good faith toward their partner. That’s understandable — but good faith gestures don’t need expiration dates. A fair, mutually agreed prenup that both partners genuinely accept is a better solution than a one-sided prenup with a sunset clause attached. If the terms need a sunset clause to be acceptable, the terms may need renegotiating. |
When Does a Prenup Effectively Expire? (The Non-Sunset Routes)
Beyond sunset clauses, a prenup can effectively expire through several other mechanisms:
Mutual revocation
Both partners can agree to revoke a prenup at any time after marriage. The revocation must be in writing, signed by both partners, and in most states must follow the same execution requirements as the original prenup — written, signed, notarized. A verbal agreement to ‘forget the prenup’ is not legally effective.
Replacement by a postnuptial agreement
A postnuptial agreement is a prenup signed after marriage. It can replace the original prenup entirely, modify specific provisions, or add new terms that the original didn’t address. This is the recommended path for couples whose circumstances have changed significantly since their prenup was signed.
Read: Prenup vs. Postnup
Court invalidation
A court can effectively ‘expire’ a prenup by finding it invalid during divorce proceedings. See What Makes a Prenup Invalid, for a full discussion of those grounds.
Should You Review or Update Your Prenup?
Even though a prenup doesn’t expire, it can become outdated. Here are the life events that should prompt a prenup review:
- You have children — your prenup may not address how assets are protected for them
- One partner leaves the workforce to raise children — the financial balance shifts significantly
- A significant inheritance is received — your prenup may need an updated inheritance clause
- One partner starts or sells a business — business protection terms may need revision
- You move to a different state — especially if moving from a common law state to a community property state or vice versa
- Your financial situations have equalized significantly — the original terms may no longer reflect your goals
- Your sunset clause date is approaching — if you don’t want it to expire, act before the date
The vehicle for updating a prenup is a postnuptial agreement — a new contract that both partners sign after marriage. A well-drafted postnup can replace your prenup entirely or simply modify the provisions that have become outdated, while leaving the rest intact.
| Building or Updating Your Prenup? HelloPrenup makes it easy to draft a state-compliant agreement — with or without a sunset clause. Attorney review available for both partners. All 50 states. From $599 per couple. → Get started with HelloPrenup → |
Frequently Asked Questions
Does a prenup expire after 10 years?
No, a prenup does not expire after 10 years unless it specifically includes a sunset clause setting expiration at the 10th anniversary. Without such a clause, a prenup remains fully valid regardless of how long you’ve been married.
What is a sunset clause in a prenup?
A sunset clause is a provision that sets an automatic expiration date for a prenuptial agreement or specific provisions within it. For example, a prenup might state that it will become void on the couple’s 15th wedding anniversary. Once that date passes, the agreement expires, and state default laws govern financial separation.
Should I include a sunset clause in my prenup?
For most couples, no. Sunset clauses introduce timing risks, potential litigation over exactly when expiration triggers, and the possibility that important protections you never intended to expire will disappear along with the provisions you wanted to limit. If one partner strongly resists the prenup’s terms, renegotiating to fairer terms is usually a better solution than adding an expiration date.
Can a prenup be extended or renewed?
Not technically — but you can replace an expiring prenup with a postnuptial agreement that includes updated terms. If your prenup includes a sunset clause and you don’t want it to expire, you and your partner can sign a postnuptial agreement before the expiration date that replaces the old prenup and reflects your current circumstances.
Does a prenup expire when you have children?
Not automatically — a prenup remains valid after children are born unless it includes an event-based sunset clause that specifically triggers expiration at the birth of a child. However, having children is a significant life change that should prompt a prenup review, since your financial circumstances and goals have likely shifted.
How do you void a prenup after marriage?
A prenup can be voided after marriage by:
(1) mutual written revocation signed by both partners
(2) replacement with a postnuptial agreement
(3) a court finding it invalid during divorce proceedings. A verbal agreement to ignore the prenup is not legally effective in any state.
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