Stock Options and RSUs in Divorce: How Unvested Equity Gets Divided

Stock options, RSUs, and other equity compensation create one of the most contentious valuation disputes in divorce. The complication isn't the vested shares sitting in a brokerage account — it's the unvested grants that may or may not materialize over the next three to five years. Both spouses have a claim, but the value is uncertain and the tax treatment is complex.

Vested vs. Unvested: Why It Matters

Vested stock options and RSUs have already been earned. The employee can exercise the options or sell the shares now. These are treated like any other marital asset — valued at current market price (minus exercise cost for options) and divided.

Unvested grants are the problem. They represent future compensation that depends on the employee continuing to work for the company. If the employee leaves before vesting, the grants are forfeited. Courts must decide: Is this marital property or future income? How much of it was earned during the marriage?

Most courts treat unvested options as marital property to the extent they were granted during the marriage — even though they haven't vested yet. The reasoning is that the grants were awarded for past service and loyalty, not just future work.

The Coverture Fraction

Courts use a coverture fraction to determine the marital share of each grant:

For options/RSUs granted before marriage: Marital share = (months from marriage date to vesting date) ÷ (total months from grant date to vesting date)

For options/RSUs granted during marriage: Marital share = (months from grant date to separation date) ÷ (total months from grant date to vesting date)

Example: An RSU grant of 1,000 shares was awarded during the marriage with a 4-year vesting schedule. The couple separates 2.5 years after the grant. The marital share is 2.5 ÷ 4 = 62.5%, or 625 shares. The non-employee spouse's share is half of that: 312.5 shares (or their cash equivalent).

Three Division Methods

Deferred distribution (if/when). The non-employee spouse receives their share only when each tranche actually vests. If the employee leaves the company and shares are forfeited, the non-employee spouse gets nothing from those tranches. This puts the risk on both spouses equally and avoids arguments about future value — but it keeps the spouses financially linked for years.

Immediate offset. A financial expert values the unvested options today (using Black-Scholes or a binomial model) and the employee spouse buys out the non-employee spouse with other assets. This gives a clean break but requires both parties to agree on a present value for something inherently uncertain.

Reserve jurisdiction. The court retains authority to divide the options later, once their value becomes clear. This is less common and creates ongoing legal involvement.

ISOs vs. NSOs: Tax Treatment

Incentive Stock Options (ISOs) receive favorable tax treatment if holding period requirements are met (held at least 2 years from grant and 1 year from exercise). A divorce-related transfer of ISOs to the non-employee spouse may disqualify them from ISO treatment, converting them to NSOs and increasing the tax bill.

Non-Qualified Stock Options (NSOs) are taxed as ordinary income when exercised. The spread between the exercise price and market price at exercise is taxed at the employee's marginal income rate — which can be 35-37% federal plus state taxes.

RSUs are taxed as ordinary income when they vest. The company typically withholds taxes automatically. After vesting, any further appreciation is taxed as capital gains when the shares are sold.

Private Company Equity

Dividing equity in a private company adds another layer of complexity. There's no public market price, so valuation requires a professional appraisal. The appraiser applies discounts for lack of marketability (the shares can't be easily sold) and minority interest (the employee typically holds a small percentage of the company).

If the company is pre-IPO, the value could change dramatically in either direction. Some couples agree to a deferred division — wait for a liquidity event (IPO, acquisition, or secondary sale) and split the proceeds at that point.

Practical Steps

1. Get the complete grant history. Request the employee spouse's equity compensation summary from the company's stock plan administrator (Schwab, E*Trade, Morgan Stanley). This should show every grant — exercised, vested, unvested, and expired.

2. Calculate the marital coverture for each grant. Each grant may have a different marital share depending on when it was awarded relative to the marriage.

3. Choose a division method. Deferred distribution is most common for unvested grants; immediate offset works better when both spouses want a clean financial break.

4. Address taxes explicitly in the settlement. Specify who bears the tax liability on exercise or vesting. Without clear language, the employee spouse may end up paying taxes on shares they had to give away.

The Marital Asset & Debt Division Worksheet includes fields for tracking equity compensation — grant dates, vesting schedules, exercise prices, and coverture calculations — alongside all other marital assets.