Which States Are Community Property States? The 9 Plus Opt-Ins

Nine U.S. states are community property states: Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, and Wisconsin. In each of these states, most property either spouse earns or acquires during the marriage is owned equally by both, no matter whose paycheck it came from or whose name is on the title. Five additional states — Alaska, Florida, Kentucky, South Dakota, and Tennessee — let married couples opt into community property treatment through a written agreement or trust.¹

The Nine Community Property States

These states apply community property rules by default to married couples who live there:

Arizona
California
Idaho
Louisiana
Nevada
New Mexico
Texas
Washington
Wisconsin

Every other state uses common law property rules, also called equitable distribution. In those states, property generally belongs to the spouse who earned it or whose name is on the title, and courts divide marital property at divorce based on what the judge considers fair rather than a strict 50/50 split.¹

The Five Opt-In States

Alaska, Florida, Kentucky, South Dakota, and Tennessee are not community property states by default, but they allow spouses to classify some or all of their assets as community property through a formal written agreement or community property trust. Alaska was the first to offer this option.²

Couples usually elect in for the federal tax benefits, especially the step-up in basis at the death of the first spouse (explained below). Both spouses have to knowingly consent in writing. Simply moving to one of these states does not make your property community property; you have to affirmatively choose it.

What Community Property Actually Means

In a community property state, each spouse holds an undivided half-interest in the marital estate. The core of that estate is income earned through work during the marriage: wages, salaries, commissions, bonuses, and self-employment income. Property bought with that income — a house, a car, furniture — is community too, even if the deed or registration lists only one spouse.

Retirement contributions made during the marriage from community earnings also belong to both spouses, as do investment returns on community property, rental income from jointly owned real estate, and profits from a business either spouse runs during the marriage.³

These states apply a presumption that any asset a spouse holds is community property. A spouse who wants to prove something is theirs alone carries the burden of proof. The standard varies; some states ask for a preponderance of the evidence, others require clear and convincing evidence.

What Stays Separate Property

Not everything a married person owns gets pulled into the community estate. These categories generally remain separate:

Property owned before the marriage, including houses, savings, and investments held while single
Gifts made specifically to one spouse by a third party, even during the marriage
Inheritances received through a will, trust, or intestate succession, whenever received
Personal injury awards for pain and suffering, though the portion that replaces lost wages can be treated differently

Keeping separate property separate takes discipline. Depositing an inheritance into a joint checking account and paying household bills from it is commingling, and once separate and community funds are blended, the separate character of the money can be lost. Courts use a process called tracing to figure out what portion of a mixed account remains separate, and the spouse making the claim has to document it with bank records and account histories. In a contested divorce, that analysis often requires a forensic accountant.

Spouses can also change the character of property through a written transmutation agreement, and prenuptial or postnuptial agreements can override community property rules entirely. A couple in California, for instance, can sign a prenup stating that each spouse’s earnings stay separate.

Debts Are Shared Too

Equal ownership cuts both ways. Debts incurred during the marriage are generally community obligations, which means both spouses can be pursued even if only one signed the loan or opened the credit card. Credit card balances, medical bills, and car loans taken on during the marriage can be collected from community assets, including the non-signing spouse’s share of joint accounts and wages.

The legal theory is that debts incurred during the marriage are presumed to benefit the family. Some states carve out exceptions for debts clearly unrelated to the family’s benefit, such as gambling losses, but the default favors creditors. Most states, community property or not, also follow the necessaries doctrine, which makes each spouse responsible for the other’s essential expenses like food, shelter, and medical care.

How Community Property Gets Divided in Divorce

The common assumption is that community property states split everything 50/50 in divorce. That’s close to right in most of them. California, Louisiana, and several others start from a strict equal-division requirement. Texas uses a “just and right” standard that lets judges divide the community estate unevenly based on factors such as each spouse’s earning capacity, fault, and the needs of the children.⁴

Even in strict equal-division states, the split is of the estate’s total value, not necessarily each asset. One spouse might keep the house while the other takes a larger share of retirement accounts, as long as the totals come out even. Courts also look at whether a spouse wasted community assets, whether selling a particular asset would trigger a large tax bill, and how hard a given holding (a family business, for example) is to divide.

Only community property gets divided. Separate property that was documented and kept separate stays with the spouse who owns it, which is why tracing matters so much. If you cannot prove your inheritance stayed separate, the court treats it as community property and splits it.

The Step-Up in Basis at Death

The biggest financial reason community property status matters outside of divorce shows up when one spouse dies. In a community property state, both halves of a community asset — the deceased spouse’s half and the surviving spouse’s half — get their tax basis reset to fair market value.⁵

In a common law state, only the deceased spouse’s half of a jointly held asset gets stepped up. The surviving spouse’s half keeps its original basis. Take a home bought for $200,000 that’s worth $800,000 when one spouse dies. In a community property state, the surviving spouse’s basis in the whole home resets to $800,000, so an immediate sale produces no capital gains tax. In a common law state with joint tenancy, the surviving spouse’s basis would be $500,000 (their original $100,000 half plus the deceased spouse’s stepped-up $400,000 half), and a sale would generate $300,000 in taxable gain.

This full step-up is the main reason couples in opt-in states like Alaska, Tennessee, and South Dakota set up community property trusts. They are buying access to this tax treatment.⁵

Moving Between Community Property and Common Law States

Property doesn’t automatically change character when you cross a state line. Several community property states — California, Idaho, Louisiana, Nevada, Washington, and Wisconsin — handle this through a concept called quasi-community property, which treats assets you acquired in a common law state as if they had been community property all along, for purposes of divorce or the death of a spouse. If you earned and saved $500,000 while living in New York and then retired to California, a California divorce court would split those savings equally as quasi-community property. Arizona, New Mexico, and Texas do not apply the quasi-community property concept in estate proceedings, though community property principles may still apply in divorce there.

Going the other direction — moving from a community property state to a common law state — raises its own issue. Over a dozen common law states have adopted the Uniform Disposition of Community Property Rights at Death Act, which preserves the community character of property brought in from a community property state so a surviving spouse keeps their half-interest. Without that law, the surviving spouse can lose their community interest under the new state’s rules.

If you are planning an interstate move, review how it will affect ownership of your existing assets, your beneficiary designations, and your estate plan before you go. Updating documents in advance is cheaper than sorting it out after a death or divorce.

One Important Limit: Retirement Accounts

Employer-sponsored retirement plans like 401(k)s and pensions are governed by ERISA, the federal law that overrides state community property rules in several ways. Even though contributions made during the marriage are technically community property, you cannot claim your half simply by pointing to state law. To divide these plans in divorce, you need a Qualified Domestic Relations Order (QDRO), a specific court order that meets federal requirements and tells the plan administrator to pay a portion of benefits to the non-participant spouse.⁶

The same preemption affects beneficiary designations. A plan can pay out to whoever is named on the beneficiary form, even if community property law would give the spouse a claim, and a divorce decree alone does not override the form on file. Keep beneficiary designations current, and update them after any divorce.⁶

1
Internal Revenue Service. Publication 555, Community Property
2
Justia. Alaska Statutes 34.77.030 – Classification of Property of Spouses
3
Louisiana State Legislature. Art. 2338. Community Property – Louisiana Laws
4
Justia. Community Property vs. Equitable Distribution in Property Division Law
5
Office of the Law Revision Counsel. 26 USC 1014 – Basis of Property Acquired from a Decedent
6
U.S. Department of Labor. QDROs – An Overview FAQs