Community property states and the 50/50 rule
Key numbers
- Nine states are community property states: Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington and Wisconsin (IRS Publication 555).
- In those states, property acquired during the marriage while you live there is generally community property, owned by both of you, whatever name is on it (IRS).
- Separate property generally means what you owned before the marriage, plus gifts and inheritances received during it, kept separate (IRS).
- Five more states, Alaska, Florida, Kentucky, South Dakota and Tennessee, let couples opt in to community property through a special trust. It does not happen automatically (J.P. Morgan Private Bank).
- Everywhere else, and in DC, the rule is equitable distribution instead. See fair does not mean equal.
There are two property systems in the United States, not fifty. Which one your state uses changes the starting point of every conversation about the 401(k), the house and the credit cards. This page covers the first system.
The nine community property states
| State | Code |
|---|---|
| Arizona | AZ |
| California | CA |
| Idaho | ID |
| Louisiana | LA |
| Nevada | NV |
| New Mexico | NM |
| Texas | TX |
| Washington | WA |
| Wisconsin | WI |
That is the whole list. If your state is not one of these nine, you are in an equitable distribution state, along with the District of Columbia.
The opt-in states, in one paragraph
Alaska, Florida, Kentucky, South Dakota and Tennessee are sometimes called opt-in community property states, because they let a married couple create a community property trust and put assets into it (J.P. Morgan Private Bank). This is a deliberate estate planning step, usually taken for tax reasons. Living in one of those states does not make your property community property. Unless you and your spouse signed a trust like that, treat your state as an equitable distribution state. Our calculator does the same.
What the 50/50 presumption actually means
Community property starts from a simple idea: what the two of you built during the marriage belongs to both of you equally, so the community half of the estate is presumptively split down the middle. Two things about that sentence do a lot of work.
It applies to the community portion, not to everything you own. Step one is always sorting what is community from what is separate. Step two is the split.
It is a presumption, not a guarantee. States apply it differently, agreements between spouses can change it, and specific assets can be traded rather than sliced in half. Nothing on this page tells you what a court in your county will do, and nobody who is not your attorney can tell you that either.
The 401(k) and the pension
Retirement accounts are the usual biggest asset for couples over 50. What matters is not whose name is on the account, it is when the money went in. Contributions and growth during the marriage are generally community property; a balance that existed before the wedding is generally separate.
Two mechanics follow from that. For an account with a balance, the common approach is subtraction: today's balance minus the balance on the wedding date. For a pension, the common approach is the coverture fraction: months married during plan participation divided by total participation months. Our Marital Share Estimator runs both methods and applies the 50/50 starting point when you pick a community property state.
Dividing an employer plan such as a 401(k), a 403(b) or a private pension needs a separate court order called a qualified domestic relations order. Dividing an IRA does not; that happens through the decree (IRS).
The house
A home bought during the marriage with earnings from the marriage is normally community property, even if only one name is on the deed. It gets complicated when a house was owned before the marriage and then paid down with marital earnings, or when a down payment came from an inheritance. Those are tracing questions, and they are exactly the kind of thing a CDFA or a forensic accountant is hired for.
Before you decide to keep it, run the after-tax comparison in the House vs. 401(k) Comparison. An even split on paper is often not even in your hand.
The debt
Debt follows the same logic as assets. Debt taken on during the marriage is generally community debt, and a card in one spouse's name alone can still be community debt if it was run up during the marriage. The important practical point is separate from the legal one: a divorce decree binds the two of you, it does not bind the bank. If your name is on a joint loan, the lender can still come to you when the other person stops paying. Ask about refinancing and about closing joint accounts early, not at the end.
Separate property, in plain English
The IRS definition is the clearest short one. Separate property generally includes property you or your spouse "owned separately before your marriage," money earned while living in a non-community-property state, and property "received separately as a gift or inheritance during your marriage," plus anything bought with separate funds (IRS Publication 555).
Three things that trip people up:
- Commingling. An inheritance deposited into the joint checking account and spent on the household is very hard to trace back. Separate property that was kept separate stays easier to identify.
- Growth on separate property. States treat the increase in value of premarital assets differently, and it can turn on whether the growth came from market movement or from marital effort. This is why our calculator shows the premarital balance as a flagged figure rather than pretending one rule fits everywhere.
- Property that cannot be identified as separate. IRS Publication 555 notes that property which cannot be identified as separate is treated as community property. In practice, records win arguments.
What to do with this
Find your state in the list above, then run the Marital Share Estimator with your wedding date and the account balances you can see. It will show the marital portion, the 50/50 starting point, and whether a QDRO is needed. Take that number to whoever is advising you. If you are not sure who that should be, start with who you actually need.
Keep reading
- Equitable distribution states: fair does not mean equal
- Divorce after 50: the money guide
- What is a CDFA, and do you need one?
- Divorce money statistics for women (2026)
- All free calculators
Sources: IRS Publication 555, Community Property · IRS, Retirement Topics QDRO · J.P. Morgan Private Bank, on opt-in community property states. Fetched and checked September 2026. This page explains how the two property systems generally work. It is not legal advice, and it does not tell you what you are entitled to.