Prenup Oregon: State Law Essentials

Couples getting married in Portland, Salem, or Eugene often assume a prenuptial agreement is only for the rich. That is no longer how most Oregonians treat it.

A prenup is a practical financial document that lets two people decide in advance how property, debt, and support will be handled if the marriage ever ends.

Oregon law gives these agreements clear legal footing, and when one is drafted correctly, it can save a couple enormous stress and expense later.

This guide explains how prenuptial agreements work in Oregon, what they can and cannot do, and how to put one together that will hold up.

Are Prenuptial Agreements Enforceable in Oregon?

Yes. Oregon has adopted a version of the Uniform Premarital Agreement Act, codified at ORS 108.700 to 108.740.

This set of statutes gives prospective spouses the legal authority to contract about their property and financial rights before they marry, and it tells courts how to treat those agreements during a divorce.

Because the rules are written into statute, Oregon judges have a consistent framework for deciding whether a prenup is valid rather than relying on case law alone.

Under the Act, a premarital agreement is an agreement between two people who plan to marry, made in contemplation of that marriage and effective once they actually wed.

The agreement is enforceable without separate consideration, meaning neither party has to give the other something of value other than the promise to marry.

Oregon courts will enforce a properly executed prenup unless the spouse challenging it can prove one of the specific grounds the statute lays out.

The Oregon Enforceability Test

ORS 108.725 sets the standard for striking down a premarital agreement. A prenup is not enforceable if the party challenging it proves either of the following.

First, that the party did not sign the agreement voluntarily. Oregon law treats “voluntarily” as requiring knowledge of the terms and the property affected, along with the absence of coercion, intimidation, or undue pressure.

Second, that the agreement was unconscionable when it was executed and, before signing, the challenging party was not given fair and reasonable disclosure of the other person’s property and debts, did not expressly waive that disclosure in writing, and did not have and reasonably could not have had adequate knowledge of the other’s finances.

That second ground has three parts, and all of them must be met for the agreement to fail on unconscionability. Whether an agreement is unconscionable is decided by the court as a matter of law.

The practical takeaway is that a voluntary signature plus honest financial disclosure puts an Oregon prenup on solid ground.

What an Oregon Prenup Can Cover

ORS 108.710 lists the subjects prospective spouses may address in their agreement. The range is wide and covers most of the financial questions that arise in a marriage.

What an Oregon Prenup Cannot Do

The statute also draws firm limits. A prenup cannot be used to control certain matters that Oregon reserves for the courts.

• It cannot adversely affect a child’s right to support. Child support belongs to the child, and parents cannot bargain it away.
• It cannot decide child custody or parenting time in advance. A court determines those based on the child’s best interests at the time of the dispute.
• It cannot include terms that violate public policy or require either spouse to break the law.
• It cannot fully waive spousal support if doing so would leave one spouse dependent on public assistance, as explained below.
• It cannot govern non-financial personal matters such as household chores, appearance, or how often relatives visit. Courts will not enforce lifestyle clauses.

Signing Requirements in Oregon

For an Oregon prenup to be valid, it has to meet the formalities in the statute. Some steps are required by law, and others are strongly recommended to make the agreement harder to challenge.

Can You Waive Spousal Support in Oregon?

Yes, but with a meaningful limit. ORS 108.710 lets parties modify or eliminate spousal support in a prenup.

Oregon law, however, builds in a safeguard for the public.

Under ORS 108.725, if a provision that modifies or eliminates spousal support would cause one spouse to become eligible for public assistance or medical assistance at the time of separation or dissolution, the court may order the other spouse to provide support to the extent needed to avoid that eligibility, regardless of what the agreement says.

In plain terms, you can waive spousal support in Oregon, but a court will not let that waiver push a former spouse onto public benefits. The taxpayer is not meant to absorb a private contract.

Outside of that scenario, a clearly written and properly disclosed support waiver is generally enforceable.

Full Financial Disclosure in Oregon

Disclosure is the heart of a defensible Oregon prenup. The enforceability test in ORS 108.725 ties unconscionability directly to whether each party received fair and reasonable disclosure of the other’s property and financial obligations.

If one spouse hides assets or debts, the agreement becomes far easier to attack later.

The safest practice is to attach a schedule of assets, income, and debts to the agreement for each party. Each person should list bank accounts, real estate, retirement accounts, business interests, and outstanding loans.

If a party wants to skip detailed disclosure, the statute requires that they expressly waive the right to that disclosure in writing and that the waiver be voluntary.

Even then, full transparency is the better path because it removes a common reason agreements get challenged.

What Happens in Oregon Without a Prenup

If a couple divorces without a prenup, Oregon law decides how property is divided. Oregon is an equitable distribution state, not a community property state.

Under ORS 107.105, the court divides real and personal property in a way that is just and proper in all the circumstances. Just and proper does not mean automatic, but it does start from a strong default.

That default is the rebuttable presumption of equal contribution.

ORS 107.105 presumes that both spouses contributed equally to property acquired during the marriage, whether it is held jointly or separately, and it treats work as a homemaker as a contribution to the marital estate.

A spouse who wants a larger share must prove by a preponderance of the evidence that the other did not contribute equally to a particular asset.

Without a prenup, this presumption shapes the outcome, and a court decides what is fair after reviewing the evidence. A prenup overrides this default by letting the couple set their own terms in advance instead of leaving the division to a judge.

Prenup or Postnup in Oregon?

A prenup is signed before marriage. A postnuptial agreement is signed after the wedding and addresses the same financial questions.

Oregon’s Premarital Agreement Act governs prenups specifically, but Oregon also recognizes marital and postnuptial agreements through general contract law and family law principles.

Courts will look closely at fairness, voluntary signing, and full disclosure for a postnup, much as they do for a prenup.

If you are already married and never signed a prenup, a postnup can still accomplish many of the same goals.

The cleaner option, when there is time, is to handle these decisions before the marriage so the agreement falls squarely under the statutory framework. A prenup signed without pressure and with honest disclosure is generally the stronger document.

Common Reasons Oregon Prenups Get Thrown Out

Most invalid prenups fail for predictable reasons. Avoiding these mistakes is how you build an agreement that lasts.

• One spouse signed under pressure, often when the agreement was presented days before the wedding with no real chance to review it.
• Financial disclosure was incomplete or false, so the other party never knew what they were giving up.
• The agreement was unconscionable when signed and the disclosure requirements were not met.
• One party had no opportunity to consult independent counsel and did not understand the terms.
• The agreement tried to control child support or custody, which the statute does not allow.
• The document was never properly signed in writing, or key terms were left vague and unenforceable.

How Much Does a Prenup Cost in Oregon?

Cost depends on how complex your finances are and whether you hire attorneys. Here is a realistic range for Oregon couples.

Online services such as HelloPrenup let couples build a state-aware agreement at a fraction of attorney rates, which works well when finances are relatively simple.

For higher net worth, a business, or blended family concerns, paying for separate attorneys is money well spent because it also reinforces the voluntary, well-counseled signing that Oregon courts respect.

How to Create an Oregon Prenup, Step by Step

1. Start early. Begin the conversation months before the wedding so neither person feels rushed.
2. List your finances. Each party prepares a full schedule of assets, income, and debts.
3. Decide your terms. Agree on how to handle separate property, marital property, debt, and spousal support.
4. Put it in writing. Draft the agreement in writing as ORS 108.705 requires, using clear and specific language.
5. Exchange full disclosure. Attach each party’s financial schedule so disclosure is documented.
6. Get independent review. Have each party review the draft with their own attorney where possible.
7. Sign and notarize. Both parties sign well before the wedding, ideally before a notary.
8. Store it safely. Keep signed originals where both spouses can locate them later.

Final Thoughts on an Oregon Prenup

A prenuptial agreement is not a sign that a marriage will fail. It is a clear-eyed financial plan that protects both people and removes uncertainty.

Oregon’s Premarital Agreement Act gives couples a reliable framework, and the rules reward honesty and fairness.

If you sign voluntarily, disclose your finances, and give each other time to review the terms, your Oregon prenup stands on firm legal ground. Whether you work with attorneys or use an online platform, the time to handle this is before the wedding.

Sources

• Oregon Revised Statutes Chapter 108, Premarital Agreements (ORS 108.700 to 108.740)
• ORS 108.725, Party may prove agreement unenforceable; unconscionability and support
• ORS 108.705, Agreement to be in writing
• ORS 108.715, Agreement effective upon marriage
• ORS 107.105, Provisions of judgment, division of property and equal contribution presumption