As a business and estate planning attorney who has drafted hundreds of marital agreements in Washington State over the past 12 years, I’ve seen firsthand how a well-written postnuptial agreement Washington State residents use can protect families, reduce conflict, and save tens of thousands in future legal fees. In this comprehensive guide, I’ll give you my battle-tested, attorney-drafted post nuptial agreement Washington State template for free, explain exactly when and why couples need one, and walk you through Washington-specific requirements so you can decide if this tool is right for your marriage.
Important Disclaimer: This template and article are for informational purposes only and do not constitute legal advice. Laws change, and your situation is unique. Always consult a licensed Washington family law attorney before signing any marital agreement.
A postnuptial agreement (sometimes called a “post-marital agreement”) is a written contract signed after a couple is legally married or registered as domestic partners. It defines how assets, debts, spousal maintenance, and other financial matters will be handled during the marriage and in the event of separation, divorce, or death.
Washington is a community property state (RCW 26.16.010–030). Without a valid agreement, virtually everything acquired during marriage is presumed community property and split 50/50 in divorce. A properly executed postnuptial agreement Washington State courts will enforce can override those default rules and create separate property where you want it.
In my practice, the most common scenarios that lead clients to my office for a post nuptial agreement Washington State include:
Yes — but Washington courts scrutinize postnups more closely than prenups because the couple already owes each other fiduciary duties at the time of signing.
The leading case is In re Marriage of Bernard, 165 Wn.2d 895 (2009). The Washington Supreme Court adopted a two-prong test:
See also RCW 26.09.070 and the Uniform Premarital Agreement Act (RCW 26.09.080 et seq.), which courts often apply by analogy to postnups.
Download Free Washington State Postnuptial Agreement Template (Word .docx)
(Instant download — no email required. Last updated November 2025 to reflect current Washington community property and spousal maintenance laws.)
Attach Schedule A (Husband’s Separate Property), Schedule B (Wife’s Separate Property), and Schedule C (Community Property) with approximate values. Washington courts will almost certainly invalidate the agreement if either spouse hides assets. See IRS Publication 504 and Form 1040 Schedule A/B for guidance on valuation.
While not 100% required by statute, the absence of independent lawyers is the #1 reason Washington judges set aside postnups. Include the attorney certification paragraph on the last page and have each lawyer sign.
Washington requires two witnesses and notarization for the agreement to be recordable (if you ever want to record it against real property). Use the included acknowledgment pages.
Washington allows waiver or limitation of maintenance if the provision is not unconscionable at the time of divorce (RCW 26.09.070). Be extremely careful with complete waivers if one spouse has little earning capacity.
| Clause | Why Washington Courts Care | Citation |
|---|---|---|
| Characterization of Property | Overrides community property presumption (RCW 26.16.030) | In re Marriage of Hurd, 2009 |
| Full Disclosure & Schedules | Proof of procedural fairness | Bernard (2009) |
| Independent Legal Counsel | Strong evidence of voluntariness | In re Marriage of Matson, 1986 |
| Spousal Maintenance | Courts review for unconscionability at enforcement | RCW 26.09.070 |
| Death & Estate Rights | Can waive homestead, award in lieu, etc. | RCW 11.84 & 11.12 |
| Factor | Prenup | Postnup |
|---|---|---|
| Timing | Before marriage | After marriage |
| Court scrutiny | Lower | Much higher (fiduciary duty already exists) |
| Independent counsel | Strongly recommended | Practically required |
| Typical cost (2025) | $2,500–$7,500 | $5,000–$15,000+ |
Property transfers between spouses pursuant to a postnuptial agreement are generally tax-free under IRC §1041. However:
Can I file a postnuptial agreement with the court?
No need to file unless you want it recorded against real estate (then file with county auditor).
How much does a lawyer charge for a Washington postnup?
Flat fees in 2025 typically range $4,500–$12,000 depending on complexity and whether both parties retain counsel.
Can we write our own postnuptial agreement in Washington?
Technically yes, but courts set aside DIY agreements at an alarming rate. The template I provide is a starting point, not a substitute for personalized counsel.
After more than a decade helping Washington couples protect what they’ve built together, I can tell you this: a fairly negotiated, professionally reviewed postnuptial agreement Washington State couples sign with eyes wide open almost always strengthens the marriage. It removes money fights, aligns expectations, and lets both spouses focus on the relationship instead of “what if.”
Download the free template above, fill in your financial schedules, and take it to separate family law attorneys for review. The peace of mind is worth far more than the legal fees.
Again: This is not legal advice. Consult a licensed Washington attorney before signing any marital agreement.
Need help finding an experienced attorney? The Washington State Bar Association maintains a referral service at wsba.org.