Prenuptial Agreement in
Washington
Washington is both a community property state and a UPMAA adopter, meaning that without a prenuptial agreement, all income and property acquired during the marriage is presumed jointly owned and subject to a "just and equitable" — often close to 50/50 — division in divorce. Washington's thriving tech economy, anchored by companies in the Seattle metro area, means many couples enter marriage with significant equity compensation, restricted stock units, and business interests that require careful prenuptial planning. Washington courts apply UPMAA standards emphasizing voluntary consent, full financial disclosure, and absence of unconscionability.
Property division
How Washington handles marital property
Washington is a community property state. Property acquired during the marriage is generally owned equally by both spouses.
Legal framework
UPMAA in Washington
Washington adopted the Uniform Premarital and Marital Agreements Act. The agreement must be in writing, signed voluntarily, and both parties should have access to independent counsel. Full financial disclosure is required.
Requirements
What makes a prenup valid in Washington
Understanding these requirements helps ensure your agreement will hold up when it matters most.
Notarization
Notarization is strongly recommended for enforceability.
Witnesses
Witnesses are not required by statute.
Timing
No specific statutory timing requirement. Adequate review time is recommended under the UPMAA framework.
Spousal Support
Spousal support waivers are generally enforceable if the agreement was voluntary and not unconscionable at the time of enforcement.
Coverage
What your Washington prenup can address
A prenuptial agreement in Washington can cover a wide range of financial and property matters.
Best practices
Tips for a strong prenup in Washington
Following these best practices helps ensure your agreement is clear, fair, and enforceable.
Washington's community property rules automatically make all marital income and acquisitions jointly owned — a prenup is essential for anyone entering marriage with significant premarital assets they want to keep separate.
Seattle and Bellevue tech workers often have complex equity structures including RSUs from multiple employers, ESPP shares, and pre-IPO interests — specify in the prenup how each type of equity will be characterized.
Sign the prenup well before the wedding; Washington courts under the UPMAA look carefully at voluntariness, and last-minute signing during the busy pre-wedding period raises scrutiny.
Attach a complete financial disclosure schedule including current valuations of all equity awards, real estate, investment accounts, and business interests to demonstrate full transparency.
Washington does not have a state income tax, but capital gains on the sale of certain assets are taxed — consider how the prenup's asset classification will interact with Washington's capital gains rules in a potential future division.
FAQ
Common questions about prenups in Washington
Washington is a community property state — how does that affect my Amazon or Microsoft RSUs?
RSUs that vest during the marriage are typically community property in Washington without a prenup, meaning your spouse would have a claim to half of them. A prenup can specify that all RSUs, or those granted before marriage, remain your separate property.
Can a Washington prenup protect a pre-IPO startup stake from becoming community property?
Yes. If you hold equity in a startup before marriage, a prenup can designate that stake — including future appreciation — as separate property. This is particularly important for founders and early employees whose equity may appreciate dramatically during the marriage.
Does Washington's UPMAA require both spouses to have lawyers?
No, but courts consider whether each party had a fair opportunity to consult independent counsel. Given the complexity of equity-heavy financial situations in the Seattle tech corridor, having separate attorneys review the prenup is strongly recommended.
Can a Washington community property prenup be modified after marriage?
Yes. Washington allows couples to enter into community property agreements after marriage (a type of postnuptial agreement) that can modify or confirm how property is characterized. These agreements must also meet UPMAA standards for voluntary consent and disclosure.