Washington Divorce Financial Planning: Community Property, No-Income-Tax, RSU Division at $500K+

Washington is one of nine community-property states in the United States, governed by RCW Title 26. The single most important consequence: assets acquired during the marriage are owned 50/50 by both spouses by operation of law, regardless of which spouse's name appears on the account, the title, or the W-2. For Seattle, Bellevue, Redmond, and Kirkland tech professionals — where Microsoft, Amazon, Meta, T-Mobile, F5, and Boeing routinely grant $200K–$2M+ of RSUs and PSUs as part of compensation — the community-property treatment of equity comp is the dominant financial issue in nearly every high-asset Washington divorce.

Layer on Washington's no-state-income-tax structure (RCW 82, which excludes a general individual income tax), the 7% capital gains tax on gains over $262K (RCW 82.87, effective 2022 and upheld in Quinn v. State, 2023), and the $2.193M state estate tax threshold with a 20% top rate (RCW 83.100 — the highest top rate of any state), and the planning matrix for a $1M+ Washington divorce is unique.

Community property under RCW 26.16.030: the 50/50 default

RCW 26.16.030 defines community property as "property not acquired or owned, as prescribed in RCW 26.16.010 [separate property of the wife] and 26.16.020 [separate property of the husband], acquired after marriage by either husband or wife or both, is community property."

The presumption under Washington case law is that all property acquired during the marriage is community unless proven separate by clear and convincing evidence. Separate property under RCW 26.16.010 and .020 includes:

• Property and pecuniary rights owned before marriage
• Property acquired during marriage by gift, bequest, devise, or descent
• Rents, issues, and profits of separate property (with significant case-law nuance on the active vs. passive distinction)
• Property acquired with separate funds (tracing required)

At dissolution under RCW 26.09.080, the court shall make a "just and equitable" division of all property — both community and separate — "after considering all relevant factors including but not limited to: (1) The nature and extent of the community property; (2) The nature and extent of the separate property; (3) The duration of the marriage; (4) The economic circumstances of each spouse at the time the division of property is to become effective." This is the Washington-specific wrinkle: the court can divide separate property if equitable, unlike pure community-property regimes (e.g., California) where separate property is largely off-limits.

RSU characterization at vest: the dominant Washington tech-divorce issue

Tech compensation in Seattle is heavily weighted toward equity. Microsoft, Amazon, Meta, and Google all grant RSUs on multi-year vest schedules (typically 4-year ratable). A senior Microsoft engineer may have $500K of unvested RSUs at the time of divorce. The dollar value is unrealized, the shares are not yet owned, and they may be forfeited if the employee leaves the company before vesting. How does Washington characterize this?

Under DewBerry v. George (Wash. App. 2003) and subsequent Washington case law, unvested equity granted during the marriage is community property to the extent it compensates work performed during the marriage. The court applies a time-rule formula:

Community percentage = (months married during the vesting period) ÷ (total months of the vesting period)

Worked example: A Microsoft engineer received a $200K RSU grant on January 1 of year 1 of marriage (a 4-year ratable vest, 48 months total). The couple separates 30 months into the marriage. The community percentage on this grant:

• Months of marriage during vesting period: 30
• Total months of vesting period: 48
• Community percentage: 30/48 = 62.5%
• Community share: 62.5% × $200K = $125,000
• Each spouse's share of the community portion: $62,500
• Employee's separate portion (vesting post-separation for post-separation work): 37.5% × $200K = $75,000

A generalist family law attorney applying a flat 50/50 to the entire $200K grant overstates the non-employee spouse's share by $37,500 ($100K vs. correct $62.5K). At a $500K total equity comp position, the error is six figures. The forensic CPA or Certified Divorce Financial Analyst (CDFA®) who specializes in Washington tech-divorce equity allocations is a critical hire.

Performance-based grants (PSUs) and the "measurement period" wrinkle

Microsoft, Amazon, and other large tech employers also grant Performance Share Units (PSUs) with multi-year measurement periods. PSUs typically vest based on company performance metrics over a 3-year measurement period.

The Washington court applies a similar time-rule formula but uses the measurement period instead of the vesting period:

Community percentage = (months married during the measurement period) ÷ (total months of the measurement period)

For a 3-year PSU measurement period where the couple was married for 18 months of the 36-month period: community percentage = 18/36 = 50%. If the PSU pays out at $300K, the community share is $150K, with each spouse receiving $75K.

The Washington 7% capital gains tax under RCW 82.87

Washington enacted a 7% tax on long-term capital gains exceeding $262K per year per individual (2024 threshold, indexed annually) under RCW 82.87. The tax was upheld in Quinn v. State, 526 P.3d 1199 (Wash. 2023). Key features:

• Applies to long-term capital gains only (held more than one year)
• Exempts gains from sales of: (a) real estate, (b) interests in qualified family-owned small businesses, (c) certain retirement account distributions, (d) cattle, horses, and breeding livestock if related to the taxpayer's trade or business
• Charitable contribution deduction up to $107,762 (2024 amount)
• Tax applies at the individual level, not the household — so divorce can split a single $400K gain across two ex-spouses, with neither necessarily crossing the threshold

Divorce planning implications: a Microsoft executive who plans to sell $400K of vested RSU shares in the year of divorce will face Washington capital gains tax of 7% × ($400K − $262K) = $9,660 if the sale happens pre-divorce as a single spouse, OR potentially $0 if the spouses split the shares and each sells under their own threshold post-divorce. Pre-divorce sales should be modeled against the threshold.

Sale of the marital home: Washington's capital gains tax exempts real estate sales (RCW 82.87.050). So even a $2M Bellevue home sale with a $1M+ gain triggers no Washington capital gains tax — federal §121 and federal LTCG/NIIT are the full picture.

Washington estate tax: the 20% top rate and the $2.193M threshold

Washington's estate tax under RCW 83.100 has the highest top rate of any state — 20% on the amount above $9M of taxable estate. The exclusion is $2.193M (2026, indexed annually). The rate schedule is progressive, starting at 10% and rising to 20%.

For a Seattle tech couple with $10M combined estate, the Washington estate tax on a single estate at death (just one spouse's death with everything left to the surviving spouse) is deferred via the unlimited marital deduction. But on the second death, the entire $10M is subject to Washington estate tax: roughly $1.4M.

Divorce as estate-tax planning: dividing a $10M combined estate into two $5M individual estates produces approximately $448K of Washington estate tax per individual = $896K total — still less than the $1.4M on a single $10M estate, saving about $500K. For couples with $5M combined estates, the savings are even more dramatic: two $2.5M individual estates each owe roughly $36K = $72K total vs. approximately $448K on a single $5M estate. Divorce saves about $376K in this case.

The double step-up under IRC §1014(b)(6) in Washington

One of Washington's most valuable tax features for high-net-worth couples is the full double step-up in basis under IRC §1014(b)(6). In community-property states, when the first spouse dies, BOTH halves of community property receive a basis step-up to date-of-death FMV — not just the deceased spouse's half (which is the rule in non-community-property states).

For a Washington couple holding $1M of appreciated stock in community property (original basis $200K, current value $1M, $800K embedded gain): on the first spouse's death, the entire $800K embedded gain is wiped out. The surviving spouse can sell immediately and pay zero tax.

Divorce implication: post-divorce, the community-property regime ends. The full double step-up is lost on future appreciation. Pre-divorce, the couple should consider whether to sell appreciated assets that would benefit from the double step-up timing — especially if one spouse is in poor health.

The federal QDRO and Microsoft 401(k) mechanics

For a Microsoft, Amazon, or Boeing 401(k), the federal QDRO mechanism applies — ERISA §206(d)(3) and IRC §414(p). The sequence:

• The Washington Superior Court issues the dissolution decree allocating the 401(k) (typically 50% of the community portion).
• The QDRO is drafted using the plan's pre-approved model. Microsoft, Amazon, and Boeing all have standard forms.
• The plan administrator reviews and accepts.
• The Washington judge signs.
• The plan implements the division.

The QDRO must be drafted, plan-approved, and judge-signed BEFORE the dissolution decree is final. The 10% early-withdrawal penalty under IRC §72(t)(2)(C) is waived for QDRO distributions to alternate payees.

Microsoft Mega-Backdoor Roth wrinkle: Microsoft (and Amazon, Boeing, and most large tech employers) allow after-tax 401(k) contributions up to the IRC §415(c) limit ($72K total employer + employee + after-tax in 2026), with in-service Roth conversions. A Microsoft employee may have a substantial after-tax sub-account within the 401(k). The QDRO can split this sub-account, and the alternate payee can roll the after-tax portion directly to a Roth IRA. This is a powerful planning move that requires explicit QDRO language identifying the sub-account.

The §121 exclusion and the Bellevue marital home: timing matters

Federal IRC §121 allows a $250K capital-gain exclusion on the sale of a primary residence ($500K MFJ). For a Bellevue couple who bought at $700K and is selling at $1.8M (gain $1.1M):

• Sell pre-decree as MFJ: $1.1M − $500K = $600K taxable. Federal LTCG 15-20% + NIIT 3.8% on the portion of gain above $250K MAGI = approximately $130K. Washington capital gains tax: exempt (real estate is exempt under RCW 82.87.050). Total: $130K.
• Sell post-divorce as singles: each spouse's gain is $550K, exclusion $250K, taxable $300K. Federal at 15% LTCG + 3.8% NIIT = approximately $56K per spouse = $112K total.

Post-divorce in this case saves $18K. The result depends on each spouse's post-divorce income (which determines LTCG bracket and NIIT applicability) and timing of the sale. The Washington-specific quirk: the real-estate exemption from RCW 82.87.050 means the state-tax dimension is zero either way.

Spousal maintenance under RCW 26.09.090: no statutory formula

Washington calls alimony "spousal maintenance" and does not have a statutory guideline formula. RCW 26.09.090 directs the court to consider:

• The financial resources of the party seeking maintenance
• The time necessary to acquire sufficient education or training
• The standard of living during the marriage
• The duration of the marriage
• The age, physical and emotional condition, and financial obligations of the spouse seeking maintenance
• The ability of the spouse from whom maintenance is sought to meet payor needs and pay maintenance

Washington courts have significant discretion. Long-term marriages (20+ years) with significant income disparity frequently produce indefinite maintenance (though modifiable under RCW 26.09.170). Shorter marriages typically produce durational maintenance covering education/transition periods (3–7 years).

Post-TCJA, federal alimony deductibility is gone — Washington's no-state-income-tax means no additional state-level adjustment is needed. The federal treatment is the full picture.

Key takeaways

• Washington is a community-property state under RCW 26.16.030 — the default is 50/50 for assets acquired during marriage, regardless of name on title or account.
• Tech RSUs and PSUs at Microsoft, Amazon, Boeing, and Meta are characterized at vest using a time-rule formula: months married during the vesting period divided by total vesting period months × award value = community share. The error band for generalist attorneys applying flat 50/50 is six figures on $500K+ equity positions.
• Washington has no general state income tax but does impose a 7% capital gains tax on gains over $262K per individual (RCW 82.87). Real estate is exempt — only RSU sales, brokerage liquidations, and business sales hit the threshold.
• Washington estate tax has a $2.193M threshold and a 20% top rate (the highest of any state, under RCW 83.100). Divorce-as-estate-tax-planning saves $400K+ for couples with $5M+ combined estates.
• The full double step-up under IRC §1014(b)(6) applies pre-divorce in Washington — a powerful tax advantage that ends with the dissolution of the community.
• The federal QDRO mechanism applies for Microsoft, Amazon, Boeing 401(k)s. The Mega-Backdoor Roth sub-account within these 401(k)s can be split via QDRO and rolled to Roth IRA by the alternate payee.
• Spousal maintenance under RCW 26.09.090 has no statutory formula — Washington courts have broad discretion. Post-TCJA federal treatment governs entirely since Washington has no state income tax to layer on top.