Do You Need a Prenup Without Assets? What to Consider

Picture the balance sheet of a couple in their late twenties getting engaged. Two salaries that cover rent and the student loan payments. One car with a few years left in it. A savings account holding somewhere between three and eight thousand dollars. Maybe a 401(k) with two years of contributions in it. Nothing that would fill a page.

Couples in that position often conclude a prenup would be pointless, and the logic seems sound: an agreement about dividing property is worth something only when there is property to divide. But the timeline runs the other way. The U.S. Census Bureau puts the median age at first marriage at 28.4 for women and 30.8 for men, which means most people marry near the beginning of their earning years. The house, the raises, the vested equity, the retirement balance, the second car, the small business: nearly all of it arrives after the wedding. A prenup written when the balance sheet is thin has little to say about that balance sheet. Its work is setting the rules that will govern everything stacked on top of it later.

Those rules exist whether or not you write them. Every state has a default scheme for dividing property at divorce, and it applies automatically to couples who never sign anything. Our companion piece on creating a prenup when you have no assets takes on the threshold question of whether to bother. This one walks through the mechanics, category by category, of what the defaults do to money that does not exist yet.

What "no assets" looks like five years in

Run the tape forward on that couple. Both get promoted once. One switches employers, and the new job carries a 401(k) match and a small grant of company stock. Together they assemble a down payment: part from a savings account one partner opened in college, part from money the two of them saved after the wedding, part from a gift by one set of parents. They buy a condo. One of them picks up consulting work on weekends, registers a single-member LLC for it, and by year five that side business covers a meaningful slice of the household budget.

Five years after a wedding at which they owned nothing worth listing, they own a home with equity in it, two retirement accounts, a block of company stock, and a business. None of it existed on the day they signed the marriage license. All of it is on the table if the marriage ends, and how it gets divided is governed today by a set of rules neither of them has read.

That gap is the case for writing something down early. The categories below are the ones that come up most for couples who start with little, and each has a default rule already waiting.

What your state does with the money you earn during the marriage

This is the mechanic that surprises people most, so it deserves precision. In every state, income you earn from working during the marriage is generally treated as belonging to the marriage rather than to the spouse who earned it. The label differs by state. The effect rarely does.

Nine states run a community property system, per the IRS's Publication 555: Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, and Wisconsin. In those states the rule is stated flatly. California Family Code section 760 provides that all property acquired by a married person during the marriage while domiciled in the state is community property, which gives each spouse an undivided one-half interest in it. Section 770 carves out separate property: what you owned before the marriage, anything you receive during it by gift or inheritance, and the rents, issues, and profits of those things. Texas draws the same line in chapter 3 of its Family Code, where community property is everything acquired by either spouse during marriage other than separate property.

The remaining states use equitable distribution, which Cornell's Legal Information Institute describes as dividing marital property in a way the court considers fair rather than necessarily equal. Fair is the operative word, and a judge decides it by weighing factors such as the length of the marriage, each spouse's contributions, and each spouse's earning capacity. That discretion cuts both ways. It can produce a result that reflects your circumstances closely, and it can produce a result neither of you anticipated.

Either way, your paycheck during marriage is in scope. If one of you earns $180,000 and the other earns $60,000, no default system treats the larger paycheck as the earner's private property. If one of you steps back from paid work to raise children, no default system treats those years as a hole in your contribution. A prenup is where a couple can adopt a different rule, keep the default on purpose, or split the difference by treating salary as marital while keeping bonuses or equity separate. Our explainer on community property versus separate property goes deeper on the distinction.

The first home, and the down payment nobody writes down

Buying a first home is where a thin balance sheet turns into a real one, and it is the most common place couples discover their money has quietly changed character. That purchase now tends to land well into a marriage rather than before it: the National Association of Realtors reported the first-time buyer share of the market falling to a historic low of 21%, with the median first-time buyer age rising to 40.

Here is the problem in miniature. One partner brings $40,000 from a savings account funded before the wedding, which is separate property, cleanly. That money goes into the down payment on a house titled in both names, and the mortgage is paid for the next eight years out of a joint account fed by both salaries. What happens to the $40,000?

The answer depends on where you live and on what you can prove. California addresses it head on: Family Code section 2640 gives a spouse the right to reimbursement, without interest, for separate property contributed to the acquisition of community property, unless that spouse waived the right in writing. Reimbursement covers down payments and improvements. It does not carry a share of the appreciation. Other states handle identical facts differently, some through tracing rules and some by treating a contribution to jointly titled property as a gift to the marriage. Undocumented, that $40,000 becomes an argument about bank statements from eight years earlier.

A prenup can settle it in a paragraph: the contribution is reimbursed first, or it is credited with a proportional share of the appreciation, or it is a gift to the marriage and nobody counts it again. Each of those is a legitimate choice. The trouble comes from not choosing. Our guide to prenups for first-time homeowners covers the purchase in more detail, and buying a home before marriage handles the version where the house comes first.

Retirement balances that grow from zero

Retirement accounts are the quietest asset in a young marriage and often the largest one by the time anybody looks closely. The mechanics are straightforward and still catch people off guard: contributions made during the marriage, along with the growth on them, are generally marital property, even though the account carries one name and one Social Security number.

A 401(k) holding $9,000 on the wedding day and $260,000 fifteen years later is mostly marital, with the premarital $9,000 and its growth typically treated as separate when it can be traced. Dividing an employer plan is its own procedure. Under federal rules, a plan pays a portion to a spouse or former spouse only through a qualified domestic relations order, the court order described in the Department of Labor's QDRO guide. A prenup does not replace that order and cannot override the federal rules governing the plan. What it can do is record what the two of you decided each account is meant to represent, so the later paperwork carries out your agreement instead of a judge's read on it.

Retirement is also where the default rule can feel furthest from a couple's intent. Two people who kept separate accounts their whole marriage, contributed at different rates, and thought of retirement savings as personal may find the law takes a different view. Gaps between what a couple assumes and what the state provides are the circumstances people plan around.

Student debt you brought in versus debt you take on together

Debt draws less attention than assets in prenup conversations and produces at least as much anxiety. Student loans are among the largest categories of household debt the Federal Reserve Bank of New York tracks in its Household Debt and Credit report, and for couples marrying in their late twenties and thirties they are often the biggest line either partner brings to the table.

The general rule is friendlier than people fear. Debt one partner took on before the marriage usually stays that partner's separate obligation, and a spouse does not become liable on a loan by marrying the borrower. The complications arrive later, from three directions.

The first is repayment with marital money. Eight years of payments from a joint account fed by both salaries is marital income servicing a separate debt, and states differ on whether the marital estate can claim reimbursement for it. The second is refinancing. A borrower who consolidates or refinances a premarital loan during the marriage, especially with a spouse cosigning, can turn a clean separate obligation into something much harder to characterize. The third is debt taken on during the marriage, which in community property states can reach community assets even when one spouse alone signed, and which in equitable distribution states a court allocates alongside the property.

A prenup can address all three: this loan stays mine, payments from joint funds create no reimbursement claim, and debt either of us takes on for a purpose the other has not agreed to in writing belongs to whoever took it on. Couples in the middle of this can read our post on what to do when one partner has debt, and the everyday version of these questions turns up in prenups for student loans and pets.

The business or equity that does not exist yet

The hardest asset to divide is often the one that had not been founded when the couple married. The U.S. Census Bureau publishes Business Formation Statistics tracking new business applications nationwide, and a business started during a marriage carries a characterization problem that a business started before it does not.

A company founded during the marriage is, under most default schemes, a marital asset. It was built with time, and usually with money, that the law already treats as belonging to both spouses. That holds even when one spouse did all the work, carried all the risk, and holds all the shares. Startup equity poses a sharper version of the same question, because options and restricted stock units are granted at one moment and vest over years, so a single grant can straddle the engagement, the marriage, and a separation. Courts have built formulas for apportioning grants across those periods, and the formulas vary by state.

Writing terms for a business that does not exist sounds abstract, and it is easier than it sounds, because you are describing a category rather than valuing a company. A prenup can provide that any business either partner founds and operates stays that partner's separate property, that the non-owner spouse receives a defined offset instead of an ownership interest, or that appreciation attributable to marital effort is shared while the entity itself is not. Deciding this before there is a valuation to fight over also removes the incentive problem, since neither of you knows yet which one will be the founder. For deeper treatment, see what happens to your business without a prenup and the separate property clause in a prenup.

Why agreeing now is easier than agreeing later

Every section above shares a shape. There is a default rule, the default rule stays invisible until it applies, and by the time it applies the two people it applies to want opposite things. Writing an agreement while you own little means the second and third parts of that shape have not happened yet.

Symmetry is the practical version of the argument. When neither partner holds significant assets, nobody is shielding a fortune from anyone, and the terms tend to come out reciprocal because neither of you knows which side of them you will end up on. The partner who wants businesses kept separate might turn out to be the founder, or might turn out to be married to the founder. Negotiating from behind that uncertainty produces terms both people can live with, and it removes the dynamic that makes prenups tense when one party arrives with a balance sheet and the other arrives without one.

The legal case points the same direction. Enforceability turns on factors set out in the Uniform Premarital Agreement Act, a model law adopted in 29 states plus the District of Columbia, and the two that matter most here are voluntariness and disclosure. Voluntariness means neither partner was pressured or rushed into signing. Disclosure means each had a fair picture of the other's finances beforehand. Both are easier to satisfy months before a wedding than weeks before one, and disclosure in particular takes far less work when the finances fit on a single page. Courts weigh enforceability case by case, so no agreement is beyond challenge, but time and candor are the conditions that tend to hold up.

None of this is unusual anymore. A 2026 Harris Poll conducted for Bloomberg found that 53% of engaged or married Americans under 45 had signed a prenup. If you want the version of this argument written for households that are comfortable rather than wealthy, do middle-income couples need a prenup takes it on directly, and how much a prenup costs covers the price side of the decision.

Frequently asked questions

Is a prenup worth it if we do not have any assets?

For many couples, yes, because the agreement governs what you build after the wedding rather than what you bring to it. Wages earned during marriage, a first home, retirement contributions, and a business founded later are all shaped by state default rules, and a prenup is where a couple can set different terms while agreeing is still easy.

What happens to money we earn during the marriage without a prenup?

State law decides. In the nine community property states listed in IRS Publication 555, income earned during the marriage is generally community property, giving each spouse a one-half interest. In equitable distribution states, a court divides marital property in a way it considers fair, which does not always mean equal.

Can a prenup cover a house we have not bought yet?

Yes. A prenup can set how a future purchase is characterized and how a separate-property down payment is treated, including whether the contributing partner is reimbursed and whether that partner shares in appreciation. California Family Code section 2640, for example, provides reimbursement without interest unless the right was waived in writing, and other states handle the same facts differently.

Am I responsible for my spouse's student loans?

Marrying someone does not make you liable on a loan they took out before the marriage, and premarital debt is generally treated as separate. Complications tend to come from paying that debt with joint income, refinancing it during the marriage, or taking on new debt afterward. A prenup can state how each of those is handled.

Can a prenup cover a business that does not exist yet?

It can, by describing the category rather than valuing a company. Terms can provide that a business either partner founds stays that partner's separate property, or that the other partner receives a defined offset, or that appreciation from marital effort is shared while ownership is not. Agreeing before there is a valuation to argue about is considerably simpler.

When should we sign if we are starting from nothing?

Earlier is generally better. Enforceability factors under the Uniform Premarital Agreement Act include voluntariness and fair financial disclosure, and both are easier to demonstrate months before a wedding than in the final weeks. Disclosure is also lighter work when there is not much to disclose, which is one more reason a sparse balance sheet is a good starting point.

Getting started with First

If your finances fit on one page today, you are at the easiest possible moment to write down how you want to handle the next twenty years of them. No hourly billing, no PDFs going back and forth, no lawyering-up before you have decided what you want. Compare First's packages to see which one fits where you are.

Sources

• IRS Publication 555, Community Property: the nine community property states.
• California Family Code section 760: property acquired during marriage while domiciled in California is community property.
• California Family Code section 770: definition of separate property, including premarital property, gifts, and inheritances.
• California Family Code section 2640: reimbursement without interest for separate property contributed to the acquisition of community property, absent a written waiver.
• Texas Family Code, Chapter 3: Texas definitions of separate and community property.
• Cornell Legal Information Institute, Equitable Distribution: equitable distribution divides marital property fairly rather than necessarily equally.
• U.S. Census Bureau, Estimated Median Age at First Marriage (Table MS-2): median first-marriage age of 28.4 for women and 30.8 for men.
• National Association of Realtors, first-time home buyer share: first-time buyer share at a historic low of 21% and median first-time buyer age of 40.
• U.S. Department of Labor, QDROs: The Division of Retirement Benefits Through Qualified Domestic Relations Orders: how employer retirement plans are divided between spouses.
• Federal Reserve Bank of New York, Household Debt and Credit Report: student loans among the largest categories of U.S. household debt.
• U.S. Census Bureau, Business Formation Statistics: national tracking of new business applications.
• Uniform Premarital Agreement Act, Uniform Law Commission: enforceability factors including voluntariness and disclosure, and adoption by 29 states plus the District of Columbia.
• Young Couples Are Driving a Prenup Boom: Harris Poll for Bloomberg, 2026; the 53% figure for engaged or married Americans under 45.

First is not a law firm. The information and tools provided by First on this site are not legal advice and not a substitute for the advice of an attorney. Property rules and enforceability standards vary by state and are decided case by case, so couples may want independent legal review.