The scenario

When RSUs are granted before the marriage but some of the tranches vest during the marriage, California (and other community-property states that follow the same rule — Washington, Texas, and Arizona) apportion the shares between separate and community property. Unvested RSUs at the date of marriage are partly the employee's separate property and partly community; the exact split depends on which apportionment method the court applies.

The examples below use the standard sample grant — 480 shares vesting quarterly from 2020-01-01 through 2024-01-01 — with a marriage date of 2022-05-01 (about 28 months into the grant) and a date of separation of 2023-11-01 18 months later. The marriage is short by California standards, but it sits in the late, steeper stretch of the grant's accrual: every in-marriage tranche has most of its grant-to-vest window sitting in pre-marriage time, so Nelson carves most of each one into SP. A relatively brief marriage, with a disproportionately wide SP carve-out. The employee's hire date is 2017-01-01.

The geometry: curves reset at the marriage axis

When the marriage starts after the grant, every method's CP allocation curve starts at zero on the marriage date. None of the pre-marriage accrual counts as community property, regardless of method — so every curve resets to the X-axis at the marriage line before beginning to climb.

The vesting schedule (the yellow dashed line) doesn't reset — it shows the actual vest events, which keep happening on their original cadence. What changes is how much of each tranche each method counts as community: under every method, the answer for anything before the marriage date is zero.

The light purple shading between the two curves — from the marriage date through the date of separation — marks the region this article exists to highlight: the gap between what the community would receive under Vested Shares and what it actually receives under Vest-Level Nelson, sitting on the in-marriage portion of the timeline.

The darker purple vertical bar at DOS is the legally meaningful measurement: the height of the gap between the two curves at the date of separation. That height — in shares — is the ceiling of any community reimbursement claim. (More precisely, the claim would be assembled tranche-by-tranche, with each in-marriage vest contributing its own SP carve-out; the height at DOS is the sum.)

The numbers: Vested Shares vs. Vest-Level Nelson

Community-property share counts at DOS = 2023-11-01, first with the baseline marriage date that covers the entire grant, then with the marriage moved to 2022-05-01. The same shift happens — to varying degrees — under Grant-Level Nelson, Ratable Vested, and the Hug variants; Vest-Level Nelson is shown here as the representative case because it's California's default method.

Nelson, the default California method, favors the community less here

Most California RSU cases apply some form of the Nelson formula — it's the method courts default to for grants treated as future-service incentives. In the baseline scenario (marriage covers the full grant), Vest-Level Nelson gives the community more shares than Vested Shares does, because it picks up partial credit for tranches that haven't yet vested at the date of separation.

When the marriage starts mid-grant, that relationship inverts. Vest-Level Nelson now divides each tranche by its grant-to-vest window — and the pre-marriage portion of that window is SP. The early tranches whose short denominators normally amplify Nelson's CP allocation now amplify the SP carve-out instead, because most of their accrual window falls before the marriage. The result is that Nelson reports a smaller community share than Vested Shares does in this scenario, even though Vested Shares is usually the more conservative method.

The same pattern applies to the other apportionment methods — Grant-Level Nelson, Ratable Vested, and both Hug variants — to varying degrees. Each one allocates some portion of the accrual window to pre-marriage time, and any tranche whose accrual window straddles the marriage line ends up partly carved out as SP. The Hug methods extend the denominator back to the hire date, so for long-tenured employees the SP carve-out (and the purple band) grows further still.

An open question: community labor and the SP carve-out

Under any of the methods above, some portion of each tranche that vests during the marriage is characterized as separate property. The formulas justify that by allocating the SP share to the pre-marriage accrual period.

But those shares didn't vest automatically. They vested because the employee continued working at the company through the marriage — and an employee's labor during marriage is the textbook example of community effort under California family law. If the employee had quit on the wedding day, none of those tranches would have vested at all; they would have been forfeited under the standard RSU agreement.

So the math produces an odd result: shares that exist only because of in-marriage labor are characterized as the employee's separate property. The formula treats the pre-marriage portion of the accrual window as if it generated the value, even though without continued post-marriage work nothing would have vested at all.

That mismatch — between what the formula assumes about who earned the shares and what actually caused them to vest — is what this article is pointing at. The question of whether a community can recover for that mismatch is a legal one, and not one this article is qualified to answer. What the math can say is exactly how many shares are being carved out, tranche by tranche, on these facts.

What that claim would look like, in numbers

Using the same sample grant and dates, here are the tranches that vested between 2022-05-01 and 2023-11-01. Under Vest-Level Nelson, each is split between community and separate property by the formula's per-tranche fraction. The SP column shows the carve-out the formula attributes to pre-marriage time — the same shares the community might argue it produced by continuing to work during the marriage.

On this fact pattern, Vest-Level Nelson carves out roughly 137 shares (out of 180 shares that actually vested during the marriage) as the employee's separate property. Those 137 shares would not have existed without the employee's continued labor during the marriage — without that labor, the underlying RSU agreement would have caused all of those tranches to be forfeited.

For reference: the Vested Shares method counts all 180 of those in-marriage tranches as community property. The 137-share delta between Vested Shares and Vest-Nelson is, in essence, the ceiling of any community-reimbursement claim — it's the value the Nelson formula carves into SP that Vested Shares would have left in CP.

This is the part of the article where we stop being a calculator and start being a question. The math above is mechanical. The legal argument here is not. If you're litigating or settling a marriage-after-grant case and the SP carve-out is significant, this is a conversation worth having with your attorney.

Common questions

Are RSUs community property in California?

RSUs earned during the marriage are community property under California law. RSUs granted before the marriage are partly community and partly separate property, with the split decided by an apportionment method like Nelson, Hug, or Vested Shares. Whether unvested RSUs at the date of separation count as community depends on the method the court applies.

What happens if my RSUs vest during marriage but were granted before?

Each tranche that vests during the marriage is split between separate and community property based on how much of its grant-to-vest accrual window sat before the marriage versus during it. Under the Nelson formula, the pre-marriage portion of the accrual window is treated as separate property — so tranches whose accrual window mostly predates the marriage end up mostly separate, even though they vested in-marriage.

Are unvested RSUs at the date of marriage divided in a divorce?

Yes — unvested RSUs at the date of marriage are still part of the marital estate to the extent they vest before the date of separation. The pre-marriage accrual is the employee's separate property; the rest is community, with the boundary set by the apportionment method.

How does the Nelson formula treat RSUs granted before marriage?

The Nelson formula apportions each tranche by the fraction of its accrual window that fell during the marriage. For a grant that predates the marriage, the pre-marriage portion of the accrual window is carved out as separate property. The earlier a tranche's accrual window starts relative to the marriage date, the larger the separate-property carve-out for that tranche.

Do Washington, Texas, and Arizona handle RSUs the same way?

The four big community-property states — California, Washington, Texas, and Arizona — follow the same general rule: RSUs earned through labor during the marriage are community property, with pre-marriage accrual treated as separate. The specific apportionment formula and the names courts use for it vary by state, but the math shape of the problem is the same: a fractional carve-out keyed to how much of the accrual window fell during the marriage.