Most people think of a prenuptial agreement as permanent. Once it is signed, it governs the marriage from the wedding day forward, and it applies whether the couple divorces after two years or after thirty. That is the default approach, but it is not the only option. Some couples choose to build an expiration date into their agreement, so that some or all of its terms end after a set number of years or when a particular event occurs. These provisions are known as sunset clauses.
Sunset clauses have become a frequent topic of conversation among engaged couples, especially those who feel uneasy about signing an agreement that will limit their rights for the entire length of the marriage. The idea has intuitive appeal. A prenup can protect one spouse during the early years, when the marriage is new and the risk of a short-lived union is highest, and then fall away once the relationship has proven itself. In practice, however, sunset clauses raise important questions about property division, alimony, estate rights, and timing. Understanding how they work under Florida law is essential before deciding whether one belongs in your agreement.
What Is a Sunset Clause in a Prenuptial Agreement?
A sunset clause is a provision stating that a prenuptial agreement, or specific parts of it, will terminate at a defined point in the future. After that point, the terms covered by the sunset clause no longer apply, and the spouses are generally treated as though they had no agreement on those issues.
The most common version is based on time. An agreement might state that it expires on the couple’s tenth wedding anniversary, for example, or that it terminates if the marriage lasts fifteen years without either spouse filing for divorce. Other sunset clauses are triggered by events rather than dates. The birth or adoption of a child, one spouse leaving a career to care for the family, or a move to another state for the other spouse’s job are all examples of events that some couples use as triggers.
Sunset clauses can also be partial. Rather than ending the entire agreement, a partial sunset clause might end only the waiver of alimony, only the provisions dealing with a particular asset, or only the restrictions on a spouse’s inheritance rights. The rest of the agreement continues in force.
The purpose behind a sunset clause is usually fairness. The spouse with fewer assets may be willing to accept limited rights at the start of the marriage, but may not want to be bound by those limits after decades together, particularly if their career or earning capacity has been affected by the marriage. The spouse with more assets, meanwhile, may be most concerned about a short marriage in which the other spouse could receive a significant financial benefit. A sunset clause is one way to balance those competing concerns.
Are Sunset Clauses Legal in Florida?
Florida law permits sunset clauses in premarital agreements. The governing statute is section 61.079 of the Florida Statutes, which is Florida’s version of the Uniform Premarital Agreement Act. That statute gives couples wide latitude to decide what their agreement covers, including property rights, spousal support, estate matters, and any other matter involving their personal rights and obligations, so long as the terms do not violate public policy or a statute imposing a criminal penalty.
Nothing in Florida law prohibits a couple from agreeing that some or all of those terms will end on a particular date or upon a particular event. Because the sunset clause is part of the original agreement, it is treated as one of the agreed terms rather than as a later change. This distinction matters because Florida law provides that once the marriage takes place, a premarital agreement may be amended or revoked only by a written agreement signed by both spouses. A sunset clause does not require a new signed document when it takes effect, because both parties already agreed to it before the wedding.
A prenuptial agreement with a sunset clause must still meet all of the standard requirements for enforceability. It must be in writing and signed by both parties. It can be challenged if a spouse proves that it was not signed voluntarily, that it was the product of fraud, duress, coercion, or overreaching, or that it was unconscionable when signed and the challenging spouse did not receive fair and reasonable financial disclosure, did not waive that disclosure in writing, and did not otherwise have adequate knowledge of the other spouse’s finances.
In some cases, a sunset clause can actually make an agreement more defensible. A spouse who later argues that the agreement was unfair may have a harder time making that case if the agreement was designed to limit its own reach and to restore default legal rights after a period of time. That benefit depends heavily on how the clause is drafted and how the rest of the agreement is structured, which is why working with an experienced Tampa prenup lawyer matters.
Common Types of Sunset Provisions
There is no single form of sunset clause. Couples can structure these provisions in several different ways depending on their goals.
Full expiration clauses. Under this approach, the entire prenuptial agreement terminates at a set point. After that date, Florida’s default rules on property division, alimony, and inheritance apply as if the couple had never signed an agreement, unless the clause says otherwise. This is the simplest version, but it can create the most dramatic change in outcomes.
Partial expiration clauses. These provisions end only specific terms. A common example is an agreement that waives or limits alimony for the first ten years of marriage, after which the alimony waiver expires while the property provisions continue. Another example is an agreement that protects a family business as separate property permanently, but allows the waiver of estate rights to lapse after a certain number of years.
Event-based triggers. Some sunset clauses are tied to life events rather than the calendar. The birth of a child is a frequent trigger, since many couples recognize that one spouse may reduce work hours or leave the workforce entirely to raise children. Other possible triggers include a spouse’s disability, a relocation for the other spouse’s career, or a spouse’s decision to leave a job to work in the family business.
Combined triggers. Couples can also combine time and events. For example, an agreement might provide that the alimony waiver ends either on the twelfth anniversary or upon the birth of a second child, whichever occurs first.
Conditional sunsets. Some agreements provide that the sunset only takes effect if certain conditions are met, such as the absence of a pending divorce petition on the sunset date or the continued cohabitation of the spouses. These conditions help prevent disputes about whether a marriage that was already breaking down reached the milestone.
Each of these approaches carries different consequences. The right choice depends on the assets involved, the couple’s plans for children and careers, and how much predictability each spouse wants.
What Happens When a Florida Prenup Expires?
When a sunset clause takes effect, the terms it covers stop applying. The practical question is what replaces them. In most cases, the answer is Florida’s default law.
For property division, that means equitable distribution under section 61.075 of the Florida Statutes. Florida courts begin with the premise that marital assets and liabilities should be divided equally, unless there is a justification for an unequal distribution based on factors such as each spouse’s contributions to the marriage, the duration of the marriage, and the economic circumstances of each party. Marital assets generally include property acquired during the marriage, while nonmarital assets generally include property owned before the marriage, gifts, and inheritances kept separate.
This raises one of the most important drafting questions in any sunset clause: does the expiration apply retroactively or only going forward? Suppose a couple’s agreement states that income earned during the marriage will remain each spouse’s separate property, and the agreement expires after ten years. If the couple divorces in year twelve, a court will need to decide whether the income earned in years one through ten remains separate, or whether the expiration converts it into marital property subject to division. The answer should come from the agreement itself. A clause that fails to address this question invites litigation.
Another practical issue involves appreciation and commingling. Even without a prenup, premarital property is generally nonmarital in Florida. However, the enhancement in value of a nonmarital asset can become marital if it results from marital funds or the efforts of either spouse, and separate funds that are mixed with marital funds can lose their separate character. A couple that relied on their prenup to keep assets separate for years may find, after the sunset date, that the default rules treat some of those assets very differently.
Timing also matters. Florida law generally uses the earlier of the date of a valid separation agreement or the date a divorce petition is filed as the cutoff for identifying marital assets. A well-drafted sunset clause should specify that the sunset date is measured against the filing date, so there is no dispute over whether the agreement was still in effect when the divorce began.
Sunset Clauses and Alimony in Florida
Spousal support is often the central issue in a sunset clause discussion. Many couples who consider an alimony prenup in Tampa are specifically interested in limiting support during the early years of the marriage, while leaving room for support if the marriage lasts a long time.
Florida allows couples to modify or eliminate spousal support in a premarital agreement. There is an important exception, however. If eliminating or reducing support would leave a spouse eligible for public assistance at the time of separation or divorce, a court may order support despite the agreement’s terms, to the extent necessary to avoid that result. This safeguard applies regardless of whether the agreement contains a sunset clause.
Florida’s alimony law was significantly revised in 2023. The legislature eliminated permanent alimony and set limits on the duration of durational alimony based on the length of the marriage. Under the current framework, a marriage of less than ten years is considered short-term, a marriage of at least ten years but less than twenty years is moderate-term, and a marriage of twenty years or more is long-term. Durational alimony generally may not exceed fifty percent of the length of a short-term marriage, sixty percent of a moderate-term marriage, or seventy-five percent of a long-term marriage. The length of the marriage is measured from the date of marriage to the date the divorce petition is filed.
These categories often influence how couples structure a sunset clause. A couple might, for example, set the alimony waiver to expire on the tenth anniversary, aligning with the point at which the marriage would move from short-term to moderate-term under Florida law. Others choose a later date to give the higher-earning spouse more protection, or tie the sunset to the birth of children rather than a specific anniversary.
It is also important to remember that the expiration of an alimony waiver does not guarantee that alimony will be awarded. After the sunset date, a court would apply Florida’s standard alimony analysis, which requires a showing that one spouse has an actual need for support and that the other spouse has the ability to pay. The court would then consider factors such as the standard of living during the marriage, each spouse’s earning capacity, and each spouse’s contributions to the marriage. A sunset clause restores the right to request alimony, but the outcome still depends on the facts.
Temporary support while a divorce is pending is another area where caution is warranted. Florida courts have long been reluctant to enforce waivers of temporary support and attorney’s fees during the pendency of a case, and the law in this area has developed over time. Couples should not assume that a sunset clause will control temporary support in the same way it controls final alimony.
Sunset Clauses and Estate Planning Rights
Prenuptial agreements do not only govern divorce. Many agreements also address what happens when one spouse dies, and this is an area where sunset clauses require particular care.
Under Florida law, a surviving spouse has several important rights. These include the elective share, which generally allows a surviving spouse to claim thirty percent of the deceased spouse’s elective estate, as well as rights related to homestead property, exempt property, a family allowance, and the right to inherit if the deceased spouse’s will was made before the marriage and did not provide for the new spouse. Many prenuptial agreements waive some or all of these rights, particularly when one or both spouses have children from a prior relationship and want to ensure their estate passes to those children.
Florida law specifically allows spouses to waive these rights by written agreement, and a waiver signed before marriage does not require the same financial disclosure that would be required for a waiver signed after the wedding. If the prenuptial agreement contains a sunset clause that ends these waivers, the surviving spouse’s statutory rights may be restored after the sunset date. That result can dramatically change the distribution of an estate.
For this reason, couples should think carefully about whether a sunset clause should apply to divorce provisions, estate provisions, or both. Some couples want inheritance waivers to remain permanent while allowing divorce-related limits to expire. Others want the opposite. There is no right answer, but the agreement should state clearly which terms expire and which do not.
A sunset clause also makes coordination with estate planning documents essential. Wills, revocable trusts, beneficiary designations, and life insurance policies should all be reviewed as the sunset date approaches. A Tampa prenuptial agreement attorney can work alongside an estate planning attorney to make sure the documents remain consistent before and after the sunset takes effect.
The Cliff Effect and Other Timing Risks
One of the most frequently discussed drawbacks of a sunset clause is sometimes called the cliff effect. When an agreement expires on a single date, the financial outcome of a divorce can change dramatically overnight. A spouse who files for divorce one day before the sunset date may receive a very different result than a spouse who files one day after.
That sharp change can create incentives that work against the marriage. A spouse who expects to benefit from the expiration may be motivated to delay filing until after the sunset date, even when the relationship has already ended. A spouse who expects to lose protection may feel pressure to file before the deadline, even when the couple might otherwise work through their difficulties. In either case, the clause can influence decisions that should be driven by the relationship rather than the calendar.
There are also practical disputes that can arise near the sunset date. One spouse may argue that the couple had effectively separated before the sunset, while the other argues the marriage remained intact. Questions may arise about whether a divorce petition that was filed and later dismissed should count. Without clear language, these disputes can become expensive and contentious.
Careful drafting can reduce these risks. The agreement can specify that the sunset date is measured by the date a petition for dissolution is filed, and it can address what happens if a petition is filed and later dismissed. It can also state that the sunset does not take effect if a petition is pending on the sunset date. These details may seem technical, but they often determine whether a sunset clause works as intended.
Alternatives to a Traditional Sunset Clause
Because of the cliff effect, many Florida prenup attorneys suggest alternatives that achieve similar goals with more gradual results.
Graduated or tiered provisions. Instead of ending the agreement all at once, a tiered provision increases the lower-earning spouse’s rights over time. For example, the agreement might provide a fixed lump sum payment or a percentage of certain assets that increases with each year or each five-year period of marriage. This approach rewards the length of the marriage without creating a single high-stakes date.
Step-up alimony terms. An agreement might set a modest level of support for a short marriage and gradually increase the amount or duration as the marriage continues. This allows alimony rights to grow in a predictable way rather than switching from none to full statutory rights at once.
Review clauses. Some couples include a provision requiring them to review the agreement at a set interval, such as every five or ten years, with the assistance of counsel. A review clause does not change the agreement by itself, but it creates a structured opportunity to update the terms through a written amendment.
Postnuptial agreements. Couples can always amend or revoke a prenuptial agreement after the wedding by signing a written agreement. A postnuptial agreement allows the terms to reflect the couple’s actual circumstances years into the marriage rather than predictions made before the wedding. Postnuptial agreements are evaluated somewhat differently than prenuptial agreements, and waivers of estate rights signed after marriage require fair disclosure, so legal guidance is important.
Event-based adjustments. Instead of a single expiration, the agreement can modify specific terms when particular events occur, such as the birth of a child. This targets the circumstances that most often justify a change in financial rights.
These alternatives can be combined with each other or with a limited sunset clause. The best structure depends on the couple’s goals and the assets involved.
Drafting a Sunset Clause That Works
A sunset clause is only as effective as the language used to create it. Several drafting considerations come up in nearly every agreement.
Identify exactly what expires. The clause should state whether the entire agreement ends or only certain provisions. If only certain provisions expire, the agreement should list them specifically, rather than relying on general language that a court may interpret differently.
Address retroactivity. The agreement should explain whether property characterized as separate before the sunset date remains separate, or whether the expiration applies to all property regardless of when it was acquired. This single issue often has the greatest financial impact.
Define the measuring date. The clause should state whether the sunset is measured from the date of marriage and against the date a divorce petition is filed, the date of separation, or some other event. Using the filing date provides the clearest standard.
Address pending and dismissed cases. The agreement should explain what happens if a petition is pending on the sunset date, and whether a petition that is later dismissed affects the sunset.
Consider death as well as divorce. The clause should state whether estate waivers expire along with divorce provisions, and the couple’s estate planning documents should be coordinated accordingly.
Include a severability clause. If a court finds any part of the agreement unenforceable, a severability clause helps preserve the rest of the document.
Ensure full disclosure and independent counsel. A sunset clause does not cure problems with the way the agreement was signed. Both spouses should provide fair and reasonable financial disclosure, and each should have the opportunity to consult an independent attorney well before the wedding. Florida does not impose a mandatory waiting period, but presenting an agreement shortly before the ceremony increases the risk of a claim that it was signed under duress.
Who Should Consider a Sunset Clause?
A sunset clause is not right for every couple, but it can be a useful tool in certain situations.
Couples who are uncertain about signing a permanent agreement may find that a sunset clause makes the negotiation more comfortable. The spouse with fewer assets may feel more willing to accept limited rights if those limits do not last forever, while the spouse with more assets gains meaningful protection during the period when a short marriage is most likely.
Couples who expect significant life changes may also benefit. If one spouse plans to leave the workforce to raise children, a sunset clause or event-based trigger can recognize that sacrifice by restoring rights that would otherwise be waived.
On the other hand, some couples should be cautious. Business owners who want permanent protection for a company, individuals with children from a prior relationship who want to guarantee an inheritance, and people with substantial family wealth held in trusts may find that a full sunset clause undermines the very protections they wanted. For these couples, a partial sunset or a graduated approach may be a better fit.
A Tampa prenup lawyer can evaluate these considerations, explain how Florida courts in Hillsborough County and elsewhere are likely to interpret different structures, and help design an agreement that reflects both spouses’ goals.
Frequently Asked Questions
Can a prenuptial agreement expire in Florida?
Yes. Florida law allows couples to include a sunset clause that ends some or all of a prenuptial agreement after a set period or upon a specific event. The clause must be part of the signed agreement, and the agreement must meet all of Florida’s standard requirements for enforceability.
What happens to our property after a prenup sunset clause takes effect?
After the sunset date, the terms covered by the clause generally stop applying, and Florida’s default equitable distribution rules take their place. Whether property characterized as separate before the sunset remains separate depends on how the clause is written. A well-drafted agreement addresses this question directly.
Does a sunset clause mean my spouse will automatically receive alimony?
No. If an alimony waiver expires, the spouse regains the right to request alimony, but a court still decides whether support is appropriate. Florida courts consider need, ability to pay, the length of the marriage, and other statutory factors before awarding alimony.
Is ten years a common length for a sunset clause?
Ten years is a common choice, partly because Florida’s alimony law treats marriages of less than ten years as short-term. However, there is no required length. Couples can choose any period that fits their circumstances, or they can tie the sunset to an event such as the birth of a child.
Can a sunset clause apply only to part of the prenup?
Yes. Many agreements use partial sunset clauses that end only specific provisions, such as an alimony waiver, while leaving other terms, such as protection of a family business, in place permanently. The agreement should clearly identify which provisions expire.
What happens if we file for divorce right before the sunset date?
Generally, the agreement would still apply if the divorce petition is filed before the sunset date, but the outcome depends on the agreement’s language. A well-drafted clause specifies that the sunset is measured against the filing date and addresses what happens if a petition is filed and later dismissed.
Does a sunset clause affect inheritance rights?
It can. If the clause ends a waiver of the elective share, homestead rights, or other spousal inheritance rights, the surviving spouse’s statutory rights may be restored after the sunset date. Couples should decide whether estate provisions should expire and coordinate their estate planning documents accordingly.
Can we remove or extend a sunset clause after we are married?
Yes. Florida law allows spouses to amend or revoke a prenuptial agreement after marriage through a written agreement signed by both of them. This can be done through a postnuptial agreement, which should be prepared with the assistance of counsel.
Planning for the Long Term
A sunset clause reflects a simple but important idea: the financial arrangement that makes sense at the start of a marriage may not make sense decades later. By allowing some or all of an agreement to expire, couples can protect against the risks of a short marriage while recognizing the contributions each spouse makes over a long one.
At the same time, sunset clauses introduce complexity. Questions about retroactivity, the cliff effect, alimony under Florida’s updated law, and estate rights all require careful thought. Graduated provisions, partial sunsets, review clauses, and postnuptial agreements offer additional ways to achieve similar goals with fewer drawbacks.If you are engaged and weighing whether your prenuptial agreement should include an expiration date, speaking with a knowledgeable Florida prenup attorney can help you understand your options and design an agreement that holds up over time.
Written by Damien McKinney, Founding Partner
Damien McKinney is the Founding Partner of The McKinney Law Group Family & Divorce Lawyers, bringing nearly two decades of experience to complex marital and family law matters. He is licensed in both Florida and North Carolina and has been repeatedly recognized as a Rising Star by Super Lawyers.