Can Married Couples Have Joint Wills?

Married couples in Washington can technically sign a single joint will, but most estate planning attorneys steer couples away from it, because a joint will can quietly tie the surviving spouse's hands for the rest of their life.

For related help, see estate-planning help, power-of-attorney guide, and Washington probate guide.

What a Joint Will Actually Is

A joint will is one document signed by two people, usually spouses, that serves as the will of both. It is different from mirror wills, which are two separate documents that happen to contain matching terms. It is also different from mutual wills, which are two wills the couple agrees not to change after one of them dies. The distinction sounds technical, but it drives a real difference in flexibility. With separate mirror wills, each spouse keeps an independent, revocable document. With a joint will, or a pair of mutual wills backed by a binding agreement, the couple may lock in a plan that the survivor cannot later revise, even when life changes in ways they never anticipated.

Why Joint Wills Are Generally Discouraged

The core problem with a joint will is that it can bind the survivor. When both spouses sign one document setting out how everything passes after both have died, courts may treat that arrangement as a contract, not just a set of wishes. Once the first spouse dies, the survivor can find they are no longer free to change the plan, because doing so would break the agreement embedded in the joint will. That rigidity can be devastating. The surviving spouse might remarry, have a falling out with a named beneficiary, face unexpected medical costs, or simply come to see that a different distribution makes more sense years later. A joint will can foreclose all of those adjustments. For that reason, joint and mutual wills are widely disfavored in modern Washington estate planning, and most couples are better served by separate wills that each spouse can revisit as circumstances evolve.

The Formalities Still Apply

Whatever form a couple chooses, the will has to satisfy Washington's basic requirements to be valid. Under RCW 11.12.020, a will must be in writing, signed by the person making it or by someone else at that person's direction and in that person's presence, and attested by two or more competent witnesses who sign the will in the person's presence. Those formalities exist to prevent fraud and to confirm that the document truly reflects the maker's intent. A joint will does not escape these rules, and packing two people's plans into one signed document does not make the execution requirements any simpler. If anything, it complicates matters, because the single document then has to be probated a certain way and interpreted for both signers, sometimes long after the first death.

Community Property Changes the Picture

Washington is a community property state, and that shapes how much of the marital estate either spouse can actually give away by will. Under RCW 26.16.030, neither spouse may devise or bequeath by will more than one-half of the community property. In practical terms, a will only controls the testator's own half of the community assets, because the surviving spouse already owns the other half. This matters for couples considering a joint will, because such a will can create the impression that the couple is jointly disposing of everything they own together, when in fact each spouse's testamentary reach is limited to their own share. Separate mirror wills, drafted with community property in mind, tend to reflect that reality more cleanly, and they let each spouse dispose of their own half without appearing to reach into the survivor's.

Why Mirror Wills Usually Make More Sense

For most married couples, two coordinated mirror wills accomplish everything a joint will promises without the loss of flexibility. Each spouse signs their own will, the terms line up so that the estate passes the way the couple wants, and after the first death the survivor still holds their own valid, revocable will. If the survivor's situation changes, they can update their document to fit the new reality. Each will independently satisfies RCW 11.12.020, and each respects the community property limits of RCW 26.16.030 by disposing only of that spouse's share. This structure gives couples the coordinated plan they are looking for while preserving the freedom that a joint will can take away. It is the approach most families in Snohomish County end up choosing once they understand the trade-offs.

When Couples Want More Certainty

Sometimes a couple has a genuine reason to want the plan locked in, for example to protect children from a prior marriage. Even then, a binding joint will is rarely the best tool, because there are other planning structures, such as certain trusts, that can provide protection without the blunt inflexibility of a will the survivor can never change. The right choice depends on the family, the assets, and what the couple is trying to guard against, which is exactly why this is a conversation worth having with an attorney rather than a form to fill out.

The Takeaway

A joint will is possible in Washington, but it is usually the wrong fit, because it can bind the surviving spouse and remove the ability to adapt as life unfolds. Separate mirror wills, executed with the formalities of RCW 11.12.020 and drafted with community property under RCW 26.16.030 in mind, give most couples the coordinated plan they want while keeping each spouse's future options open.

If you and your spouse are thinking through how to structure your wills, the Law Office of Chad Foster can help you weigh the options and build a plan that protects both of you without boxing in the one who is left.

This article is general information about Washington law and not legal advice. For guidance on your specific circumstances, please consult a licensed attorney.