The Community Property Agreement: Washington's Simplest Estate Plan — and Where It Fails

The five-minute version

Washington lets a married couple sign a single document that moves everything they own to the survivor when the first of them dies. No probate. No court. No waiting. It is short, it is inexpensive, and for a great many Washington households it is a sensible piece of planning.

It is also a commonly misunderstood document in Washington estate planning, because of what people believe it does. A community property agreement is frequently described — by banks, by online form providers, occasionally by well-meaning relatives — as the estate plan. It is not an estate plan. It is one instrument that solves one problem extremely well and is silent on almost everything else.

What the document actually does

Washington is a community property state. Property acquired by either spouse during the marriage generally belongs to both of them, half each. Property owned before the marriage, or received during it by gift or inheritance and kept separate, is generally separate property belonging to one spouse alone.

A community property agreement is a contract between spouses about that property. It is generally a three-prong agreement:

• It converts the separate property each spouse currently owns into community property
• It provides that property acquired in the future will be community property too
• It vests all of that community property in the surviving spouse automatically at the first death

A real benefit of the community property agreement is that it avoids probate after the death of the first spouse by automatically vesting all the property in the surviving spouse.

Blind spot: it does nothing at the second death

This is the limitation that surprises people most, and it is not a defect — it is simply the scope of the document. A community property agreement addresses the death of the first spouse.

When the second spouse dies, there is no other spouse for property to vest in. Everything the survivor owns — which by then is everything the couple owned — passes under the survivor's will, or, if there is no will, under Washington's intestacy statute. Probate is squarely back on the table, now with the entire combined estate in it rather than half.

Blind spot: the blended family problem

A community property agreement by itself gives everything to the surviving spouse outright and unconditionally. The survivor then owns it absolutely and may do whatever they like with it — including leaving all of it to their own children and none of it to yours.

They are not required to honor any understanding the two of you had. A promise between spouses about what the survivor will do later is, in most circumstances, not enforceable against them once they own the property outright. The survivor may also remarry, and the new spouse acquires rights of their own.

If your intention is that your children eventually receive something, an outright transfer to your spouse is the wrong instrument for that intention. There are structures that provide for a surviving spouse for life while preserving the remainder for your own children. Talk with an estate planning professional about your options.

Blind spot: it can waste an entire exclusion

Washington levies its own estate tax, entirely separately from the federal one, and the Washington threshold is far lower. The exclusion amount is $3 million as of August 2026. Families nowhere near the federal threshold routinely owe Washington estate tax.

Two features of Washington law combine here, and the combination is the point of this section.

• Washington's exclusion is not portable between spouses. Under federal law, a surviving spouse can generally carry over the unused portion of the first spouse's federal exclusion. Washington has no equivalent mechanism. If the first spouse's Washington exclusion is not used, it is simply gone.
• A community property agreement moves everything to the survivor. Which means nothing passes at the first death that would use the first spouse's exclusion.

Put those together and a couple can lose an entire $3 million exclusion by doing nothing wrong at all — by using an estate planning document for its intended purpose.

The figure that matters is the gross estate: the house at current market value, retirement accounts, business interests, and the death benefit of life insurance you own, all counted together. A paid-off home in Kitsap County, retirement account and a life insurance a policy reaches the Washington threshold very quickly.

Blind spot: it can fight your own trust

If you have a revocable living trust, an old community property agreement sitting in a drawer is a genuine hazard rather than a harmless duplicate.

A trust works by owning things. Assets are retitled into it during your lifetime, and the trust's terms then govern what happens to them. A community property agreement works by vesting community property in the surviving spouse. If both documents are operative and they point different directions on the same asset, you have a conflict — and the people who have to resolve it are your family, after you are gone, possibly in the proceeding you signed the trust to avoid.

This is one of the most common problems we see in reviewing existing plans, and the cause is almost always the same: the couple signed a community property agreement years before the trust and forgot it existed. Well-drafted trust packages address the interaction directly. Documents assembled a decade apart, from different sources, frequently do not.

Blind spot: it converts separate property

Recall the first prong: the agreement converts the separate property each spouse owns into community property. That clause is easy to skim past and it is doing something consequential.

Separate property could be the inheritance from your mother, the house you owned before the marriage, the business you started in your twenties, or the award from a personal injury claim. Characterizing it as community property changes who owns it — and community property is exposed to community debts, which can include obligations incurred by the other spouse.

It also matters if the marriage ends in something other than death. Washington courts divide property in a dissolution, and the character of an asset — community or separate — is part of that analysis. A document signed years earlier converting separate property to community can turn out to have been one of the more consequential things either spouse ever signed, and it was signed at a moment when nobody was thinking about it in those terms.

Blind spot: it does nothing while you are alive

A community property agreement operates at death. It has nothing to say about the years before that, and incapacity is far more likely than most people plan for.

If you cannot manage your own affairs, your spouse does not automatically acquire authority to act for you. Marriage alone does not confer the power to sign on your behalf, manage your separate accounts, deal with your retirement plan, or make your medical decisions. Without the right documents, the route to that authority runs through a guardianship proceeding — public, expensive, slow, and entirely avoidable.

The instruments that address this are a durable power of attorney for finances and a health care directive with a medical power of attorney. They are not part of a community property agreement and are not implied by one.

When it is the right tool

A community property agreement combined with other estate planning documents may be a sound choice for couples after careful consideration of tax issues, prior estate planning, divorce/subsequent marriages, and blended families with an estate planning professional.

What to do this week

Review your estate planning documents. If they are more than two years old, have them reviewed with an estate planning attorney. If you have documents that were prepared at different times, have them reviewed together.

• If you do not have any estate planning in place, schedule an appointment with an estate planning attorney.
• Review the gross value of your estate — house at market value, retirement accounts, business interests, life insurance death benefit. If the combined figure is near or above $3 million and your estate planning documents do not address tax planning, or if you have no estate plan in place, see an estate planning attorney.