How to Address RSUs and Stock Options in a Prenup

Why Equity Compensation Needs Its Own Conversation in a Prenup

A prenup lets you and your partner decide, together and in writing, how your RSUs and stock options are classified if the marriage ends, instead of handing that decision to your state's default rules. That's the whole point. You get to write your own rule before anyone else does.

This is a planning conversation, not a defensive one. Two partners sit down, put every grant on the table, and agree on what feels fair to both of them. The clarity you build now is what keeps a hard future moment from turning into a guessing game about who earned what and when.

Equity compensation shows up constantly in tech, startup, finance, and executive households. A software engineer at a pre-IPO company, a founder holding early common stock, a bank vice president with an annual RSU refresh, a physician with performance shares. If a meaningful slice of your compensation arrives as equity rather than cash, that equity deserves its own section in your agreement.

Here's the catch with generic templates. Most of them treat assets like static line items: a house, a savings account, a car. Vesting equity doesn't behave that way. It's tied to your job, it changes value constantly, and the line between "before the marriage" and "during the marriage" runs right through the middle of a single grant. A template that lumps it in with your checking account will miss almost everything that matters.

What RSUs and Stock Options Are and Why Vesting Matters

RSUs and stock options are both forms of equity compensation, but they work differently, and the difference changes how you address them.

A Restricted Stock Unit (RSU) is a promise from your employer to deliver actual shares once you meet certain conditions, usually staying employed for a set period. A stock option is the right to buy company shares at a fixed price, called the strike price or exercise price, within a certain window. If the market price climbs above your strike price, the option has value. If it doesn't, the option can expire worthless.

Vesting is the mechanism that decides when you actually own any of it. A few common structures:

• Time-based cliff vesting: Nothing vests until you hit a milestone (often a one-year cliff), then a chunk vests at once.
• Graded vesting: Equity vests in pieces over time, such as 25% per year over four years, or monthly after the cliff.
• Performance-based triggers: Vesting depends on hitting company or individual targets, a revenue goal, or a liquidity event.

Three words do a lot of work here. Granted equity has been awarded to you but you don't own it yet. Vested equity has cleared its conditions and is yours. Unvested equity is still waiting on the clock or a trigger.

Now picture the timing problem. You receive a four-year RSU grant eight months before your wedding. It keeps vesting for more than three years into the marriage. Part of that single grant was earned while you were single, and part while you were married. Without a written rule, splitting that one grant into separate and marital pieces is exactly where disputes start.

How State Rules Classify Equity Without a Prenup

If you never sign an agreement, your state decides. And states split into two camps.

Nine community property states (California and Texas among them, plus Arizona, Idaho, Louisiana, Nevada, New Mexico, Washington, and Wisconsin) generally treat property earned during the marriage as owned 50/50, regardless of whose name sits on the cap table. Most other states, including New York and Massachusetts, use equitable distribution, which divides marital property in a way a court considers fair, not necessarily equal.

In both systems, equity earned through work performed during the marriage is generally marital or community property. It doesn't matter that the grant is in your name alone or that the shares haven't vested. What matters is when the work happened.

One more distinction that trips people up. State law controls classification (whose property it is), but federal law controls taxation. Under 26 U.S.C. § 1041, transfers of property between spouses incident to divorce are generally tax-free at the moment of transfer, though income tax still comes due later when equity is exercised or sold. Both bodies of law apply at the same time.

The takeaway is simple. If you don't write your own rule, these frameworks write it for you. A prenup is how you and your partner opt into your own terms instead.

How Courts Divide Unvested Equity Using Time-Rule Formulas

When equity straddles the line between single life and married life, courts reach for a coverture or time-rule formula. In plain terms, it's a fraction: the share of the vesting period that overlapped with the marriage, applied to the grant to figure out how much is marital.

The trickier question is what the grant was for. Courts often distinguish between equity that rewards past service and equity that incentivizes future work. A grant meant to compensate you for work you already did tends to pull more toward the marital side if that work happened during the marriage. A grant designed to keep you around and motivated going forward tends to lean more toward the employee spouse.

California illustrates the range of discretion involved. Courts there have used two different time-rule approaches, often referred to as the Hug and Nelson formulas, depending on whether a grant primarily rewarded past service or incentivized future performance. Neither is mandatory, and judges keep broad discretion to adjust based on the facts of a specific case. Other states apply their own versions of the same reasoning.

Here's why that matters to you: the outcome depends heavily on how a court reads intent years after the fact. That's a lot of uncertainty riding on interpretation. A prenup lets you and your partner skip the formula entirely and agree on one clear rule now, while you both have full information and no conflict.

What to Include When Outlining RSUs and Options in Your Agreement

The strongest equity provisions share a handful of elements. Work through these with a qualified attorney rather than relying on a fill-in-the-blank form.

• Full disclosure of current grants. List every existing RSU and option grant: grant date, share count, strike price, vesting schedule, and current or estimated value. Vague disclosure is the fastest way to create a problem later.
• Treatment of future grants. Equity you don't have yet is where many agreements fall short. Decide now how grants awarded after the wedding, including annual refreshes, will be classified.
• Vesting triggers and conditions. Spell out how time-based cliffs, graded schedules, and performance milestones are handled, and what happens to unvested shares if the marriage ends.
• A valuation method. Agree on how equity will be valued and as of what date, since value swings constantly.
• Premarital appreciation. This one matters most for pre-IPO shares and founder stock. Suppose you bring 100,000 shares into the marriage at a $20 strike, and they're worth $200 each at an IPO five years in. Your agreement can address how that growth in value is treated.
• Liquidity events. Plan explicitly for IPOs, tender offers, and acquisitions, since these are the moments paper value turns into real money.
• Division mechanics. Most stock plans prohibit transferring shares directly to a non-employee spouse. Agreements commonly rely on deferred distribution (dividing proceeds when equity eventually pays out) or offsets (trading equity value against other assets).

Two things to underline. First, incomplete disclosure can void an equity clause, and sometimes more of the agreement. Transparency between partners isn't just good faith; it's what makes the document hold up. Second, tax consequences are easy to overlook at drafting time and expensive to discover later, which is why looping in a CPA alongside your attorney is worth it.

Prenup vs. Postnup for Couples With Equity Compensation

A prenup is signed before the wedding. A postnuptial agreement (postnup) is signed after you're already married. Both can address how RSUs and stock options are classified, valued, and divided.

If you're already married and assumed the window closed, it usually hasn't. Postnups can create the same financial clarity around equity that a prenup would have, and they're common for couples whose compensation grew more complicated after the wedding: a promotion into an executive equity package, a move to a pre-IPO startup, a founder round.

Which one fits depends on where you are in your journey, not on whether you missed some deadline. Both are tools for the same goal: two partners understanding exactly how their financial partnership works.

How Neptune Guides Couples Through Equity in a Prenup

Neptune manages the entire process from start to finish. You're not handed a template and left to figure out the hard parts alone.

We pair each couple with experienced family law attorneys who actually understand complex compensation: vesting schedules, pre-IPO equity, founder stock, performance shares, and the tax questions that come with them. When equity is a real part of your net worth, that specific experience changes the quality of the agreement.

Our intake handles the asset and equity disclosure step, walking both partners through documenting every grant so nothing gets missed. Clean disclosure is what makes an equity clause durable, and structured intake keeps it thorough.

Neptune works on a flat fee that covers both partners and two independent state-licensed family law attorneys, so each of you has your own representation. We're full-service, not a marketplace and not a DIY form. Couples who plan together, grow together, and this is what planning together actually looks like.