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Prenuptial Agreement Cost in Washington

Last updated 5 min read

A prenuptial agreement in Washington typically costs $1,500 – $3,000 for a simple agreement and up to $6,000 – $10,000 for complex estates. Washington prenup costs depend on attorney rates, how complex your finances are, and whether both spouses retain their own lawyer. This page isn't legal advice — it's a plain-English summary of how a prenup in Washington works, what it costs, and what the state requires.

Cost breakdown

Complexity Typical cost Who this fits
Simple $1,500 – $3,000 W-2 income, no business, no kids from prior relationships
Moderate $3,000 – $6,000 Real estate, retirement accounts, modest separate property
Complex $6,000 – $10,000 Business interests, multi-state property, expected inheritance

Average attorney rate in Washington: $250–$400/hr. Both spouses hiring separate attorneys typically adds 50–75% to the total bill.

What Washington law requires

  • In writing: Yes — required.
  • Notarization: Not required, but recommended for evidentiary purposes.
  • Independent counsel: Strongly recommended (and often outcome-determinative if litigated).
  • Community property state: Yes — without a prenup, property acquired during marriage is presumptively split equally.

The controlling statute is Wash. Rev. Code ch. 26.16; enforceability per Friedlander v. Friedlander — read the full text on the Washington legislature site.

Washington applies the Friedlander framework: a prenup must be either substantively fair OR procedurally fair (full disclosure + independent counsel + voluntary execution). As a community property state, the default rule absent a prenup is that earnings and acquisitions during marriage are jointly owned — relevant context for any out-of-state reader.

A notable Washington case

Friedlander v. Friedlander, 80 Wn.2d 293, 494 P.2d 208 (1972). Washington Supreme Court established the substantive-or-procedural-fairness framework: a prenup must be either substantively fair OR procedurally fair (full disclosure + independent counsel + voluntary execution).

Read the full Friedlander v. Friedlander case explanation →

Timeline

Start the conversation at least 90 days before the wedding and sign at least 30 days before.

Washington prenup costs by metro

Major Washington metros have local rate variations:

  • Seattle — ~20% above Washington state average

Find a prenup attorney in Washington

The single most important hire for a Washington prenup is your own family law attorney. We partner with LegalMatch to connect readers with vetted family law attorneys in their state.

Find a prenup attorney in Washington

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Frequently asked questions

How much does a prenup cost in Washington?
A prenuptial agreement in Washington typically costs $1,500 – $3,000 for a simple agreement, $3,000 – $6,000 for a moderate one, and $6,000 – $10,000 for complex estates with businesses or multi-state property. Average attorney rates in the state run $250–$400/hr. Both spouses hiring separate attorneys adds 50–75% to the total — and is strongly recommended.
Does Washington require a notary for a prenup?
No, Washington does not require notarization by statute. A prenup must be in writing and signed by both parties; notarization is a best practice for evidentiary reasons but not a legal requirement.
Do both spouses need their own attorney in Washington?
Independent counsel for each spouse is strongly recommended (and often outcome-determinative if litigated). Joint representation — one attorney for both spouses — is among the most common grounds for a court to invalidate a prenup later. Even where it isn't strictly required, paying one lawyer to "save money" frequently costs the entire agreement.
What statute governs prenups in Washington?
Washington prenups are governed by Wash. Rev. Code ch. 26.16; enforceability per Friedlander v. Friedlander. The full statute text is available on the state legislature site.

Washington prenup attorneys

What to look for, typical rates.

Will my prenup hold up?

60-second check applying Washington rules.

Compare states side-by-side

Compare Washington with other states.

Friedlander v. Friedlander case

Washington Supreme Court established the substantive-or-procedural-fairness framework: a p…

How to get a prenup

6-step process.

What makes a prenup invalid?

5 reasons courts reject them.