Dividing RSUs in divorce with Kestrel Bay Retirement Advisors

Signing a gross split before reading the plan can cost $14,000 per tranche

Agreeing a gross share split before checking the plan’s transfer clause is a mistake of order. A decree may award unvested RSUs share for share, yet the employer may refuse to transfer those awards until vesting, leaving the employee with W-2 income for stock the former spouse receives. In Leah’s case, that put $40,000 of vest income on her W-2 and $14,000 of federal tax on shares her former spouse kept. Later tranches could create the same bill again.

Leah (hypothetical) is 38 and works as a senior software engineer at a public cloud company. She now files single after a short marriage ended. Her decree gives her former spouse half the marital part of an 800-share tranche. The tranche vests 36 months after grant, and 18 of those months fell during the marriage, so 18 ÷ 36 = 50%, or 400 marital shares. Half of 400 is 200 shares owed to her former spouse.

At an assumed $200 vest price, 200 × $200 = $40,000 that lands on Leah’s W-2. At an illustrative 35% federal rate, $40,000 × 35% = $14,000 of federal income tax. A gross delivery sends all 200 shares away while Leah still has to find $14,000 from cash, other shares, or her paycheck.

Kestrel Bay Retirement Advisors would put the steps in a different order: obtain the full vesting schedule and plan transfer rules, calculate the marital fraction for every tranche, then have the decree state the tax treatment. That sequence matters because a promise between former spouses does not change what an employer’s payroll system reports. A family law attorney must draft the decree.

The answer flips in the “Leah’s after-tax result on 200” row: gross delivery leaves her with a $14,000 bill, while a net-of-tax delivery leaves 70 shares to cover it.

• Pull the plan’s domestic-relations-order language before negotiating a share count.
• Calculate each tranche separately; one grant can have several vest dates.
• Use the employee’s expected marginal tax rate, not just payroll withholding.
• State who sells, transfers, and pays any remaining tax due.

How much of each unvested RSU tranche is marital?

Many courts use a time rule: divide the months from grant to the separation date by the months from grant to vest. That fraction of a tranche is often treated as marital property, though the fraction comes from state property law and court decisions, not an IRS formula. Your attorney should confirm the rule used where your divorce is filed before a settlement assigns any percentage.

A grant made only a few months before separation may be largely separate property under this approach. A refresher grant awarded during the marriage and substantially earned before separation can be close to 100% marital. Four-year grants frequently produce four different results because each annual or quarterly vest has a different denominator.

Some states use another formula, including approaches that begin at the hire date when a grant is viewed as payment for past service. In community-property states, the marital piece is generally divided equally, but classification and timing still matter. A label in the offer letter, the grant agreement, and local family-law precedent can point in different directions.

The separation date deserves more attention than it usually gets. A difference of three months can change the marital percentage of a large upcoming vest, especially where a grant was made near the end of a marriage. Get that date from the filing or your attorney, not from a calendar estimate.

• Grant date: found in the award agreement.
• Separation date: confirmed by your attorney or court filing.
• Vest date: shown in the stock-plan portal.
• Shares in the tranche: shown beside that vest date.
• Purpose of the grant: described in the award and employer documents.

What do IRS rulings actually say about who owes tax?

The phrase “she gets half, so she pays half the tax” is incomplete. Revenue Ruling 2002-22 says that when nonqualified stock options or deferred compensation are actually transferred incident to divorce, the former spouse who receives the right generally recognizes income when exercising the option or receiving the payment. That rule can work differently from an RSU award that an employer will not transfer while it remains unvested.

Many stock plans prohibit a direct transfer of unvested RSUs. The employee may then hold and later deliver shares under the decree, while the employer reports the full vest value through the employee’s W-2 because payroll paid the compensation to that employee. The decree can allocate the economic burden between former spouses, but it cannot force an employer to issue a different W-2.

Payroll taxes add another wrinkle. Under Revenue Ruling 2004-60, FICA on transferred nonqualified options remains with the employee spouse. Social Security tax applies only up to the $184,500 wage base for 2026, while Medicare tax has no wage cap, so the payroll effect can differ from the income-tax calculation.

An incentive stock option transferred incident to divorce generally loses ISO treatment and is handled like a nonqualified option. That can change both the timing and character of tax, so don’t trade ISO language casually in a settlement. Ask the plan administrator and a CPA how the employer will administer the exact award.

• Ask whether the award is an RSU, nonqualified option, ISO, or deferred-compensation right.
• Ask who will receive the W-2, Form 1099, or payroll reporting.
• Ask whether the plan accepts a domestic relations order.
• Ask what happens if employment ends before the award vests.

Gross or net shares: which split fits the tax bill?

A gross share split gives the former spouse the full number of shares awarded in the decree, while the employee pays tax on any vest income shown on that employee’s W-2. A net split reduces the delivered shares by the employee’s actual marginal tax cost. The former spouse receives fewer shares, but the employee is not left paying tax on stock that has already gone out the door.

In Leah’s example, net delivery means 200 × 65% = 130 shares, worth $26,000 at the assumed $200 price. Leah retains 70 shares, worth $14,000, for the tax bill. Yes, net delivery means your ex receives fewer shares, and that is the point.

An employee in a high tax bracket with several tranches remaining will usually have a strong reason to seek a net-of-tax formula. A former spouse who wants a clean break may reasonably prefer a cash payment or a 401(k) offset today over waiting for years of uncertain vesting. Those choices are judgment calls, but they should be compared after tax, not share for share.

The flat withholding taken at vest may be well below a senior engineer's real marginal rate. A clause that says "net of withholding" can still leave the employee short at filing time. If the plan will not transfer unvested RSUs and the vest income will show up on your W-2, ask that the former spouse's shares be delivered net of tax at your real marginal rate. At Leah's assumed 35%, that is the difference between keeping 70 shares and keeping none.

The non-employee spouse’s attorney often raises the RSUs first by asking for the vesting schedule. Bring a portal printout to mediation, not a recollection of what may vest. It makes the discussion less personal and more verifiable.

• Gross shares: more stock goes to the former spouse; employee may fund tax separately.
• Net shares: delivery is reduced by projected tax; employee retains shares or value for tax.
• Cash offset: immediate separation; requires cash or another asset now.
• 401(k) offset: compare the account’s future tax bill before calling values equal.

Why does a 10-to-15-year retirement horizon change the choice?

With 10 to 15 years before retirement, a tax payment on shares you give away has time to matter. Suppose Leah's $14,000 had stayed invested at an illustrative 5% a year instead: after 14 years it would be roughly $27,700 ($14,000 × 1.05^14). That is not a forecast. Stock prices and investment accounts can fall, and an account can end up worth less than what went into it.

Kestrel Bay Retirement Advisors compares after-tax values before accepting an offset. A dollar of RSUs is generally a taxable-account dollar once vested, while a dollar in a traditional 401(k) still carries future ordinary income tax when withdrawn. Giving up $200,000 of taxable shares for $200,000 in pretax retirement money is not an even trade without estimating the later tax.

The years after age 50 can be a useful rebuilding period, but they are finite. For 2026, the 401(k) employee deferral limit is $24,500, and the age-50 catch-up is $8,000, for a total of $32,500. At ages 60 through 63, the catch-up is $11,250. A person who gives up retirement assets in a divorce needs to see how many higher-contribution years remain before assuming a shortfall can simply be replaced.

Filing status may make the current bill sharper. For 2026, the 37% federal income tax rate begins above $640,600 for a single filer and above $768,700 for married filing jointly. A large grant may justify spreading a settlement arrangement across multiple vest years where the plan and decree allow it; one small tranche left may not justify expensive custom drafting.

Concentrated stock also deserves its own conversation. Keeping a large award to avoid a difficult settlement may deepen the risk that one employer’s stock determines both your settlement value and retirement savings. A concentrated stock positions review can address that exposure after the divorce terms are settled.

• Count the years until age 50, then ages 60 through 63.
• Convert traditional 401(k) amounts to an estimated after-tax value.
• List upcoming vests by calendar year and expected income.
• Separate the property division question from the decision to keep employer stock.

Seven records that make the numbers checkable

Pull records before mediation, when you still have time to correct a missing assumption. The stock-plan portal, usually operated by the brokerage that administers your employer plan, should provide the grant agreements and full vesting schedule. Download documents rather than relying on a screen view that may change after a vest or an employment change.

The grant agreement should show the grant date, vest dates, and shares in every tranche. Request the equity plan document and its transferability clause from HR or stock administration. That clause is often where the practical answer sits: direct transfer, deferred delivery, cash settlement, or no accommodation beyond payroll reporting.

Bring last year’s W-2 and a recent pay stub so a CPA can estimate a more realistic marginal rate. Add Forms 3921 for ISO exercises and 3922 for employee stock purchase plan transactions if either appears in the property list. Those forms do not settle the divorce question, but they prevent an option or ESPP tax issue from being mistaken for an RSU issue.

Obtain the legally relevant separation date from your attorney or filing. Also collect brokerage statements for vested shares, because property transferred under Internal Revenue Code Section 1041 generally keeps the transferor’s original basis. A spouse who receives old shares may later need that basis to calculate gain when selling.

Seven records are usually enough to start: grant agreements, vesting schedule, equity plan, transfer clause, W-2 and pay stub, Forms 3921 or 3922 where applicable, and brokerage statements with basis. Keep the decree drafts beside them. Small wording changes can change who must deliver shares or reimburse tax.

• Stock-plan portal: grant agreements and vesting schedule.
• HR or stock administration: equity plan and transfer clause.
• Payroll portal: W-2 and current pay stub.
• Tax file: Forms 3921 and 3922, if applicable.
• Attorney or court filing: separation date.
• Brokerage account: statements and tax basis for vested shares.
• Mediation file: proposed decree and any asset-offset schedule.

Who should answer the questions before the decree is drafted?

The plan administrator can tell you what the employer will administer, the CPA can model the tax reporting, and an advisor can compare the after-tax value of the choices. None of them replaces the family law attorney, who writes the decree and needs to fit it to state law. Give each person the same grant schedule so their answers refer to the same shares and dates.

A useful meeting does not begin with “What is the stock worth today?” It begins with the award type, the service period, the separation date, the transfer restriction, and the expected tax reporting. Then the value discussion has something solid under it.

Kestrel Bay Retirement Advisors reviews a proposed share division by calculating the tax on each scheduled vest before the document is signed. That is especially useful when a senior employee is near retirement and has several years of grants still outstanding. A Roth conversion planning discussion may also matter later, but it should not be used to paper over a poorly allocated RSU tax bill.

• Ask the plan administrator: Can unvested RSUs transfer under a domestic relations order? If not, will shares remain in my account for later delivery to my former spouse? How are shares withheld for tax at vest?
• Ask the CPA: At my expected income, what marginal rate should the decree use for net delivery? Whose return reports the vest income in the year of the split? How would a Form 1099 issued to my former spouse interact with my W-2?
• Ask the advisor: What is each side of the settlement worth after tax? Given how much of my net worth is tied to one company stock, should I keep RSUs or accept an offset?
• Ask the attorney: Does our state use this time rule for this type of grant, and does the decree match the plan’s actual transfer process?

Bring the vesting schedule to Kestrel Bay Retirement Advisors before signing

Talk with Kestrel Bay Retirement Advisors while the settlement language can still be changed, not after a gross share promise has become a court order. Bring the vesting schedule, the plan’s transfer clause, last year’s W-2, and the separation date.

The request form on this page is the first step. We talk through the fee openly when we first speak and confirm it in writing before any work starts; Kestrel Bay Retirement Advisors requires $400,000 in investable assets to take on a client.