Few couples sign a prenuptial agreement expecting their financial lives to stay exactly the same. Careers take off. A side business turns into a company with real value. Stock options vest. A parent passes away and leaves an inheritance. Within a few years, one spouse may earn several times what the other earns, or hold assets worth far more than anything either person owned on the wedding day.
When that happens, the questions change quickly. Who owns the growth? Does the spouse who stayed home with the children, or who took a lower-paying job to support the other’s career, have a claim to it? Does the prenup still hold up when the numbers look nothing like they did when it was signed?
These questions come up in Tampa more often than many people realize. The Tampa Bay economy includes a large number of business owners, physicians, real estate investors, technology professionals, and corporate executives whose income can change dramatically over the course of a marriage. A Tampa,FL prenup lawyer regularly encounters agreements that were drafted with modest assets in mind and are now being applied to very different circumstances.
Florida law provides a default framework for answering these questions, and a carefully drafted prenuptial agreement can change that framework substantially. Understanding both is the starting point for anyone who is planning to marry, is already married, or is facing a divorce in which one spouse’s wealth has grown significantly.
How Does Florida Law Treat Wealth Acquired During Marriage?
Florida is an equitable distribution state. Under section 61.075 of the Florida Statutes, a court dividing property in a divorce first identifies which assets and debts are marital and which are nonmarital, then divides the marital portion. The law starts from the premise that the division should be equal. A judge may order an unequal distribution when it is justified by factors such as each spouse’s contributions to the marriage, the economic circumstances of each party, the duration of the marriage, and whether either spouse intentionally wasted or dissipated assets.
Marital Assets
As a general rule, assets acquired and income earned by either spouse during the marriage are marital, regardless of whose name appears on the account or title. If one spouse’s salary rises from $90,000 to $900,000 during the marriage, the savings, investment accounts, retirement contributions, and property purchased with that income are typically marital. The fact that only one spouse earned the money does not, by itself, make it separate property. Florida law recognizes contributions as a homemaker and parent as real contributions to the marriage, even when they do not show up on a paycheck.
Nonmarital Assets
Nonmarital assets include property owned before the marriage, gifts and inheritances received by one spouse individually, assets excluded by a valid written agreement between the spouses, and income derived from nonmarital assets, unless that income was treated, relied upon, or used by the couple as marital property.
Active Versus Passive Appreciation
This distinction matters a great deal when one spouse becomes wealthier during the marriage. Florida treats the enhancement in value of a nonmarital asset as marital when that growth results from the efforts of either spouse during the marriage, or from the contribution or expenditure of marital funds. Growth that results purely from market forces, such as inflation or a rising stock market, is generally passive and remains nonmarital.
Consider a spouse who owned a small company before the wedding. If the company grows from $500,000 to $8 million because that spouse worked in the business full time during the marriage, a significant portion of that growth may be marital. If the same spouse instead owned a brokerage account that grew on its own without any marital funds or management effort, the appreciation would likely remain separate.
Commingling
Separate property can also lose its protected status through commingling. Depositing an inheritance into a joint checking account, using premarital savings to pay down the mortgage on the marital home, or retitling a separately owned property into both names can convert assets that started out nonmarital into marital property. Tracing the source of funds becomes critical, and the outcome often depends on financial records that couples rarely keep with divorce in mind.
Without an agreement, these statutory rules decide the outcome. With a valid agreement, the couple can largely decide for themselves.
What Are the Most Common Ways One Spouse Becomes Significantly Wealthier?
Wealth disparities rarely appear overnight. More often they build over years, and the way they develop affects how a Florida court treats them.
A Business That Grows Rapidly
Closely held businesses are among the most contested assets in any divorce. Disputes arise over whether the business was premarital, how much of its growth came from the owner’s labor, whether the owner took a below-market salary while reinvesting profits in the company, and how to value goodwill. Florida distinguishes between enterprise goodwill, which belongs to the business itself and may be divided, and personal goodwill, which is tied to an individual’s skills, relationships, and reputation and generally is not divided. A medical practice, consulting firm, or professional services company may carry substantial personal goodwill, which can shift a valuation by millions of dollars.
Stock Options, Restricted Stock, and Deferred Compensation
Equity compensation creates difficult timing questions. Options granted during the marriage may vest after a divorce is filed, and awards granted before the marriage may vest during it. Courts look at when the compensation was earned and what it was intended to reward, whether past performance or future service. Unvested awards can be partly marital and partly nonmarital, and they are often allocated using a time-based formula.
Professional Career Growth
A spouse who finishes a residency, makes partner, or rises into executive leadership may see income multiply. Florida does not treat a professional degree or license as divisible property. The income it generates during the marriage, however, and the assets purchased with that income, are generally marital. The resulting earnings gap also becomes central to any alimony analysis.
Inheritances and Family Wealth
An inheritance received by one spouse is nonmarital at the outset. It can remain that way for decades if it is kept in a separate account titled in that spouse’s name alone. It can also become marital quickly if it is used to buy a jointly titled home or deposited into shared accounts that both spouses use for household expenses.
Sudden Windfalls
Lottery winnings, the sale of a cryptocurrency position, or a large legal settlement can create wealth almost instantly. Characterization depends on when the asset was acquired and what funds were used to acquire it. For personal injury settlements, the portion compensating for lost wages during the marriage is typically treated differently than the portion compensating for pain and suffering.
Each of these situations raises its own issues. That is why an experienced prenuptial agreement attorney in Tampa will typically ask detailed questions about career trajectory, business plans, equity compensation, and expected inheritances before drafting anything.
What Happens Without a Prenuptial Agreement?
When a couple has no agreement, a Hillsborough County family court applies the default rules described above. For the spouse whose wealth grew, the result can be surprising. Income earned during the marriage, retirement contributions, the marital home, and the active growth of a premarital business may all be subject to division. Valuation experts, forensic accountants, and lengthy discovery are common in these cases, and litigation costs can climb quickly when a business must be appraised.
For the spouse who earned less, the default rules provide meaningful protection. Florida does not reward one spouse simply because that person’s name was on the paycheck. The law recognizes that a marriage is an economic partnership, and the lower-earning spouse is often entitled to an equal share of the wealth built during it.
How Does a Prenup Change the Outcome?
A prenuptial agreement allows a couple to replace many of these default rules with terms they choose together. Under the Florida Uniform Premarital Agreement Act, found in section 61.079 of the Florida Statutes, parties may contract regarding their rights in property acquired before or during the marriage, how property will be divided upon separation or divorce, the modification or elimination of spousal support, and other matters that do not violate public policy. An agreement cannot adversely affect a child’s right to support, and child custody and timesharing remain subject to the court’s review of the child’s best interests.
Provisions that commonly address the possibility of future wealth include:
- Treating each spouse’s earnings during the marriage as that spouse’s separate property
- Declaring that all appreciation of a premarital business remains separate, whether that growth is active or passive
- Identifying specific accounts as separate and requiring them to stay titled in one name
- Providing the other spouse with a set payment, or a payment that increases with the length of the marriage, instead of a share of the business
- Limiting, capping, or waiving alimony
- Addressing how the marital home will be handled if separate funds are used toward it
An agreement that a Tampa prenup lawyer drafts for a business owner will look very different from one drafted for two salaried professionals, and both will look different from an agreement designed to protect anticipated family wealth.
Will a Prenup Hold Up When the Wealth Gap Becomes Large?
Many people assume that a prenup becomes unfair, and therefore unenforceable, once one spouse’s wealth grows far beyond what anyone anticipated. Florida law generally does not work that way. Under section 61.079, a premarital agreement is not enforceable if the challenging spouse proves one of the following:
- The spouse did not sign the agreement voluntarily.
- The agreement was the product of fraud, duress, coercion, or overreaching.
- The agreement was unconscionable when it was signed, and before signing, the challenging spouse was not provided fair and reasonable disclosure of the other spouse’s property and financial obligations, did not voluntarily and expressly waive in writing any right to further disclosure, and did not have, and reasonably could not have had, adequate knowledge of the other spouse’s property and obligations.
The critical phrase is “when it was signed.” Unconscionability is measured at the time of execution, not at the time of divorce. A prenup that was fair when signed generally does not become invalid simply because one spouse later became very wealthy. That is exactly the situation many prenups are designed to address.
There is one important statutory safeguard. If a provision modifying or eliminating spousal support would cause one spouse to become eligible for public assistance at the time of separation or divorce, the court may require the other spouse to pay support to the extent necessary to avoid that result.
Courts also look closely at how an agreement came to be signed. An agreement presented days before the wedding, financial disclosures that left out major assets or understated income, and situations in which one spouse had no opportunity to consult independent counsel all invite challenges. When the stakes are high, the wealthier spouse has every reason to make the signing process as clean as possible, because a prenup is only as strong as the record behind it. A Tampa prenup lawyer focused on enforceability will typically recommend full written financial disclosure, separate attorneys for each spouse, and signing well in advance of the wedding date.
How Does Alimony Work When One Spouse Earns Far More?
A large income gap is often the foundation of an alimony claim. In 2023, Florida substantially rewrote its alimony statute, section 61.08. Permanent alimony was eliminated, leaving bridge-the-gap, rehabilitative, and durational alimony as the available forms of support.
Under the current statute, the length of the marriage drives the analysis. Florida now classifies a marriage of less than 10 years as short term, 10 to 20 years as moderate term, and 20 years or more as long term. Durational alimony is not available for marriages lasting less than 3 years. Where it is available, its length generally may not exceed 50 percent of the length of a short-term marriage, 60 percent of a moderate-term marriage, or 75 percent of a long-term marriage. The amount is generally limited to the lesser of the recipient’s reasonable need or 35 percent of the difference between the parties’ net incomes.
The party seeking alimony must first show an actual need for support and that the other spouse has the ability to pay. Courts then weigh factors that include the standard of living established during the marriage, each spouse’s age and health, financial resources, earning capacity, education, vocational skills, and contributions to the marriage, including homemaking, child care, and support of the other spouse’s career or education.
That last factor carries weight in cases where one spouse became significantly wealthier. A spouse who relocated, paused a career, or handled the household so the other could build a practice or company has a recognized contribution. At the same time, the 35 percent cap and the duration limits mean that even very high earners now face more predictable exposure than they did under the prior law.
Can a Prenup Waive Alimony in Florida?
Yes. Florida courts have long enforced alimony waivers in valid premarital agreements, subject to the public assistance safeguard discussed above. Many agreements go further than a simple waiver and instead set a fixed amount, a formula tied to the length of the marriage, or a cap on total support. A thoughtful structure can give the wealthier spouse predictability while giving the other spouse a guaranteed level of security that does not depend on litigation.
Because the 2023 changes altered the default rules, couples who signed agreements before the reform may want a Tampa prenup lawyer to review how their alimony provisions now compare to what the statute would provide. In some cases, the agreement offers less than current law. In others, it offers more.
How Should a Prenup Be Drafted to Account for Future Wealth?
The agreements that hold up best when circumstances change are the ones written with change in mind. Rather than freezing a snapshot of each spouse’s finances on the wedding day, a well-structured agreement anticipates how wealth might grow and states clearly what happens if it does.
Define Separate Property Precisely
Vague language invites litigation. A strong agreement identifies separate assets by name, describes how future income from those assets will be treated, and states whether active appreciation, passive appreciation, or both remain separate. It should also address successor assets, so that a business sold and reinvested, or a home sold and replaced, keeps its separate character.
Address Earnings and Equity Compensation
If the parties intend for each spouse’s salary, bonuses, stock options, and retirement contributions to remain separate, the agreement must say so directly. Equity awards deserve their own provisions, including how unvested awards are treated if a divorce is filed before vesting.
Consider Graduated or Escalating Provisions
Some couples choose terms that change with the length of the marriage. For example, the lower-earning spouse might receive a set payment that increases at each anniversary milestone, or a percentage of marital savings that grows over time. These provisions reflect the reality that a 15-year marriage looks very different from a 2-year marriage, and they often make an agreement feel fairer to both sides, which can reduce the risk of a later challenge.
Plan for the Marital Home
The family residence is frequently where separate and marital funds become entangled. An agreement can specify how a down payment from separate funds will be credited, how mortgage payments made with marital income will be treated, and who keeps the home if the marriage ends.
Include Sunset or Review Clauses Thoughtfully
A sunset clause ends some or all of the agreement after a set number of years. A review clause encourages the couple to revisit terms at certain milestones, such as the birth of a child or the sale of a business. Both can be useful, but they must be drafted carefully. A poorly worded sunset clause can leave the wealthier spouse unprotected at precisely the point when the gap is largest.
Document Disclosure Thoroughly
Full financial disclosure is the single best defense against an enforceability challenge. Attaching detailed schedules of assets, liabilities, and income to the agreement, along with business valuations where appropriate, creates a clear record that both spouses understood what they were signing.
What If We Are Already Married?
Couples who did not sign a prenup, or whose prenup no longer reflects their lives, can enter into a postnuptial agreement. Florida courts enforce postnuptial agreements, though they evaluate them under case law rather than the premarital statute. Because spouses already owe each other duties of good faith, a postnuptial agreement generally requires full and fair financial disclosure, and courts may look at whether the terms are fair and reasonable to the spouse giving up rights.
Postnuptial agreements are often used when one spouse starts a business, receives a significant inheritance, takes on an ownership interest in a family company, or experiences a sharp increase in income. A prenup attorney in Tampa can also draft amendments to an existing premarital agreement, which must be in writing and signed by both spouses to be effective.
How Can the Lower-Earning Spouse Protect Their Interests?
A prenuptial agreement is not only a tool for the spouse with more assets. The spouse who earns less, or who expects to step back from work to raise children, has just as much reason to negotiate carefully. Several protections are worth considering:
- Retain independent counsel. Each spouse should have a separate attorney who reviews the agreement solely on that spouse’s behalf. An agreement reviewed by only one lawyer is more vulnerable to challenge and less likely to protect the unrepresented spouse.
- Insist on complete disclosure. Ask for tax returns, business financial statements, account balances, and information about equity compensation and expected inheritances. A waiver of disclosure should be a deliberate choice, not an oversight.
- Negotiate for security that grows with the marriage. Escalating payments, a share of marital savings, life insurance requirements, or a guaranteed interest in the marital home can provide meaningful protection if the other spouse’s wealth grows substantially.
- Account for career sacrifices. If one spouse plans to relocate, reduce working hours, or leave the workforce, the agreement can provide compensation tied to that decision.
- Take enough time. A spouse who receives the agreement weeks or months before the wedding is in a far better position to negotiate than one who receives it days before.
A prenup that treats both spouses fairly is also more durable. Agreements that leave one spouse with little or nothing after a long marriage tend to draw closer scrutiny, while balanced agreements are easier to defend and less likely to end up in prolonged litigation.
Why Local Experience Matters
Prenuptial agreements are governed by state law, and Florida’s statutes, alimony framework, and appellate decisions differ in important ways from those of other states. Couples who signed agreements elsewhere and later moved to Florida should have those agreements reviewed, since choice-of-law provisions and execution requirements can affect how a Florida court will treat them.
Working with a Tampa prenup lawyer who regularly handles both agreement drafting and divorce litigation offers a practical advantage. Attorneys who see how agreements are tested in Hillsborough County courtrooms understand which provisions hold up, which ones invite disputes, and how judges in the Thirteenth Judicial Circuit approach issues such as business valuation, commingling, and alimony waivers. That perspective informs how an agreement is written from the beginning.
Whether the goal is protecting a growing company, preserving family wealth, or making sure a spouse who sacrifices career opportunities is treated fairly, the time to address these questions is before they become disputes. A prenuptial or postnuptial agreement built around realistic expectations of future wealth can give both spouses clarity, reduce conflict, and avoid the cost and uncertainty of litigating these issues later. Couples with questions about how their circumstances might be treated can benefit from a consultation with a Tampa prenup lawyer who can review their specific situation under current Florida law.
Frequently Asked Questions
Does a prenup become invalid if one spouse becomes much wealthier than expected?
Generally, no. Florida measures unconscionability at the time the agreement was signed, not at the time of divorce. A prenup that was voluntary, fairly disclosed, and reasonable when executed will usually remain enforceable even if one spouse’s wealth grows dramatically.
Is a business started during the marriage automatically marital property?
In most cases, yes, unless a valid prenuptial or postnuptial agreement provides otherwise. A business formed with marital funds or marital effort is typically treated as a marital asset subject to equitable distribution. A Tampa prenup lawyer can draft provisions that designate a future business as separate property if both spouses agree.
Can the growth of a business I owned before marriage be divided?
It can. Florida treats the increase in value of a nonmarital asset as marital when it results from either spouse’s efforts during the marriage or from the use of marital funds. Passive growth caused by market conditions generally remains separate.
Can a prenup protect stock options and restricted stock units?
Yes, but the agreement should address them specifically. Clear language about granted, vested, and unvested awards, and how each is treated if a divorce is filed before vesting, helps avoid disputes over timing and allocation.
Does Florida still award permanent alimony?
No. Florida eliminated permanent alimony in 2023. Courts may now award bridge-the-gap, rehabilitative, or durational alimony, with limits on both the amount and the length of durational awards based on the length of the marriage.
Can a prenup waive alimony entirely in Florida?
Yes. Florida courts generally enforce alimony waivers in valid prenuptial agreements. A court may still order support if enforcing the waiver would leave a spouse eligible for public assistance at the time of separation or divorce.
What can I do if we are already married and my income has grown significantly?
A postnuptial agreement can address assets and income that developed during the marriage. These agreements are enforceable in Florida when they are entered into voluntarily with full and fair financial disclosure. Speaking with a Tampa prenup lawyer about a postnuptial agreement or an amendment to an existing prenup is a practical first step.
How far before the wedding should a prenup be signed?
There is no fixed deadline in Florida law, but signing well in advance is strongly recommended. Many attorneys suggest finalizing the agreement at least 30 days before the wedding. Allowing time for negotiation and independent review reduces the risk of a later claim of duress or coercion.
Should both spouses have their own attorney?
Yes. Florida does not strictly require independent counsel, but separate representation significantly strengthens enforceability. It also ensures each spouse fully understands the rights being exchanged, particularly when one spouse has substantially greater assets or earning potential.
How often should a prenup be reviewed?
Reviewing an agreement after major life events is a sound practice. A business sale, a large inheritance, the birth of a child, a significant change in income, or a move from another state are all good reasons to have a Tampa prenuptial lawyer confirm that the agreement still reflects the couple’s intentions.
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.