What the rule says
California is a community property state, and the characterization of property as community or separate has consequential effects at death. Under California Family Code § 760, all property acquired by a married person during the marriage is presumed to be community property unless proven otherwise. Property acquired before the marriage, or during the marriage by gift, devise, or inheritance, is separate property under California Family Code § 770.
At death, the characterization affects intestate distribution under California Probate Code §§ 6401 and 6402:
- Community property passes entirely to the surviving spouse if the deceased dies intestate (Cal. Probate Code § 6401(a)). - Separate property is divided between the spouse and other heirs based on a formula that depends on what relatives survive (Cal. Probate Code § 6401(c)).
When the decedent has a will, the same characterization affects the scope of the testator's testamentary power: the testator can devise their separate property and their one-half interest in community property, but cannot devise the surviving spouse's one-half interest in community property.
How characterization is determined
The characterization of an asset depends on the source of the funds or other consideration used to acquire it:
- Acquired with separate funds: The asset is separate property. - Acquired with community funds: The asset is community property. - Acquired with a mix of separate and community funds: The asset is partly separate and partly community in proportion to the contributions, requiring tracing to allocate. - Acquired with separate funds but used for community purposes: Various complications apply, sometimes resulting in claims for reimbursement to the separate property contributor. - Property acquired during the marriage by gift, devise, or inheritance: Separate property regardless of how the gift or inheritance is used. - Income from separate property: Generally separate property in California (unlike some other community property states). - Wages and earnings during the marriage: Community property unless the spouses have entered into a transmutation agreement converting them to separate property.
The burden of proving that an asset is separate property rather than community typically falls on the spouse claiming separate ownership.
The tracing problem
At death, the executor or administrator must determine the characterization of every significant asset. This is straightforward when records are clear — a house bought with cash inherited by one spouse, an investment account funded entirely with one spouse's pre-marriage savings, a business started before the marriage and never funded with community money. But many assets have complex histories:
- The family home. Often purchased with a mix of pre-marriage savings (separate), community wages, gifts from one spouse's parents (separate of that spouse), inheritances received during the marriage (separate), and refinancing transactions that may transmute property in subtle ways. - Joint bank accounts. Often hold a mix of separate and community deposits over many years, with interest accumulating, withdrawals taken for both separate and community purposes, and intermittent gifts and inheritances added to the balance. - Investment accounts. Similar to bank accounts but with appreciation, dividend reinvestment, and sometimes tax-deferred growth complicating the analysis. - Retirement accounts. Contributions during the marriage are generally community property; pre-marriage contributions are separate; contributions of separate property after marriage may have complex characterization. - Life insurance. Premiums paid with community funds make the proceeds community property; premiums paid with separate funds make the proceeds separate. - Business interests. A business started before the marriage is initially separate but may have community property components if community labor or community funds were invested during the marriage.
The practical effect: characterizing assets at death often requires detailed financial records covering many years, sometimes decades.
Quasi-community property
California has a special category called "quasi-community property" that addresses property acquired in another state that would have been community property if acquired in California. Under California Probate Code § 66, quasi-community property is treated like community property at the death of a married Californian.
This matters for couples who relocate to California from common-law (non-community-property) states. Property acquired during the marriage in the prior state — which would have been the acquiring spouse's separate property under that state's law — is reclassified as quasi-community property in California for inheritance purposes.
The rule produces a more spouse-protective outcome at death for relocating couples. A spouse who would have been treated as the sole owner of property acquired in a common-law state finds that property treated as community-equivalent in California, with the surviving spouse retaining a one-half interest at the acquiring spouse's death.
What this means in practice
The characterization analysis becomes especially important in three scenarios:
- Disputes among heirs. Children from a prior relationship and the surviving spouse may have competing interests in characterizing assets. Children benefit from broader characterization as separate property (which is split with them under intestacy); the spouse benefits from broader characterization as community property (which passes entirely to them). - Surviving spouse's elective decisions. California does not have an elective share like Florida or New York, but the surviving spouse can sometimes elect between alternative characterizations of property (e.g., quasi-community property characterization) that affect the eventual distribution. - Estate tax planning. The federal estate tax marital deduction interacts with property characterization in complex ways. Community property has favorable basis-step-up treatment at death (both halves get a stepped-up basis), which can affect tax planning.
What you can do about it
For married Californians:
- Maintain records of separate property. Documents establishing the source of separate funds — pre-marriage account statements, gift letters, inheritance distributions, etc. — should be preserved. - Avoid commingling when separate character matters. Keeping separate property in segregated accounts simplifies characterization. - Consider transmutation agreements. Couples can enter into agreements that convert separate property to community property or vice versa. The agreements must be in writing and signed by both spouses to be effective (Cal. Fam. Code § 852). - Document significant transactions. When community funds are used to improve separate property, or vice versa, contemporaneous documentation supports later tracing.
For estate planners drafting California estate plans for married couples:
- Address characterization explicitly in the trust or will. Documents can include statements of how the parties characterize their property, which is evidence (though not conclusive) for later analysis. - Consider a community property agreement. A written agreement between spouses can clarify characterization and avoid disputes after death. - Plan for stepped-up basis treatment. The community property character of assets affects post-death basis treatment significantly.
Who this affects most
The characterization rules are most consequential for:
- Married Californians with separate property holdings - Blended families where the deceased spouse's children compete with the surviving spouse for assets - Couples who relocated to California from non-community-property states (quasi-community property treatment) - Households with complex financial histories spanning multiple marriages, gifts, inheritances, and business ventures - Estate planners structuring property holdings to achieve desired outcomes at death
California's community property system produces meaningful spouse protection but requires deliberate record-keeping and characterization analysis. For most ordinary Californian estates, the rules produce predictable outcomes; for complex estates, they can produce litigation that consumes substantial portions of the estate's value.