Proving your date of separation
Free. Last updated 10 October 2026
Two people can remember the end of a marriage differently and both be telling the truth. In California the court still has to pick one day, because what each spouse earns after it belongs to that spouse alone — and when one of them has a pension, a few months either way is paid out every month for the rest of a retirement. This page is about California law, the state the episode's story is set in. California is one of nine community property states, and every state draws its lines in its own way; nothing below carries across a state line.
One spouse's words, and that spouse's conduct
California Family Code §70 defines the date of separation as the date a complete and final break in the marriage occurred, shown by both of two things: the spouse expressed to the other spouse the intent to end the marriage, and the conduct of that spouse is consistent with that intent. The court considers all relevant evidence.
Notice what is not in it. Both spouses do not have to agree — the courts' own self-help guide says only one needs to decide the marriage is over. And separate homes are not required: the guide lists living separately while still in the same home as one example, and §70 expressly abrogates two earlier decisions on the point, In re Marriage of Davis (2015) and In re Marriage of Norviel (2002). Moving out is still evidence. It is just not the test.
Why the date is worth money
Property acquired during the marriage, while living in California, is community property (§760), and the court divides the community estate equally (§2550). Earnings and accumulations after the date of separation are the separate property of the spouse who earned them (§771). The date of separation is the line between the two.
For a pension the line works through a fraction. The usual method is called the time rule: months of service during the marriage and before separation, divided by total months of service. That fraction is the community share, and each spouse is entitled to half of it. The California Supreme Court described it in In re Marriage of Lehman (1998) as apparently the method used most frequently, and appropriate where the size of the benefit is substantially related to years of service.
What a few months is worth
A worked example, using round figures. A pension of $6,200 a month after 360 months of service. Two candidate dates of separation, nineteen months apart:
- Earlier date: 177 months of service during the marriage. 177 ÷ 360 = 49.2% community; the other spouse's half is 24.6% — about $1,524 a month.
- Later date: 196 months. 196 ÷ 360 = 54.4% community; half is 27.2% — about $1,688 a month.
The difference is 2.6 percentage points, about $164 a month. Over twenty-five years of payments that is roughly $49,000 — before cost-of-living increases, taxes or any discounting. A nineteen-month disagreement about a date is not a small argument.
What proves a date
When both spouses name different days, the court looks at the whole picture. The self-help guide lists the kinds of facts it weighs: one spouse moving out; living separately in the same home; no longer socializing as a couple; stopping combined finances, opening separate bank accounts, paying your own bills; telling friends, family or coworkers; consulting a lawyer or mediator; and whether the couple's conduct afterward stayed consistent, or they reconciled for a time.
Some of the most useful evidence of those facts is not anything either spouse wrote. It is the ordinary paperwork of a move, created by organizations doing their own jobs:
- a lease or room rental with a start date;
- a new bank account in one name, with its opening date;
- a direct-deposit change at work;
- a change of address with an employer, a union or a licensing body;
- a start-of-service date for utilities at a new address.
California's Evidence Code §1271 allows records like these into evidence, despite the rule against hearsay, when they were made in the regular course of business at or near the time of the event, a qualified witness can explain how they were made, and the way they were made indicates they can be trusted. Their value is that each was made before there was anything to argue about, by someone with no stake in how the argument came out. A note in your own calendar can be written any day and dated any day; a utility's start-of-service record cannot.
The other half of the test cuts both ways. Conduct after the date counts, so a holiday together, a shared account left running, or nights back at the old house are exactly what the other side will point to — and a court is right to consider them. If you mean the break to be final, the paper trail after it matters as much as the one on the day.
Money is sorted by when it was earned, not when it arrived
A payment that lands after the date of separation is not automatically separate. The Supreme Court in Lehman put the rule as time: to the extent — and only to the extent — that a spouse accrues a right to property during the marriage before separation, it is a community asset. Back pay, bonuses or retroactive payments received later are sorted by the period of work they pay for, which may sit on either side of the line, or both.
Dividing the pension itself
A court order is how the share actually gets paid. For private-sector plans that order is a qualified domestic relations order, or QDRO, which tells the plan administrator to pay part of the benefit to the former spouse; California's court forms include a temporary order to protect the plan until the final one is done. The courts' own guide recommends getting a lawyer when either spouse has a retirement plan, especially a pension. Government plans can have their own procedures; ask the plan what it requires.
If the papers name a date you disagree with
Say so early, and in writing. A date in a petition is one spouse's claim, not a finding, but a wrong date left unchallenged for months becomes the date everyone negotiates around. Gather the third-party records while they are easy to get — banks, employers and utilities keep them for a while, not forever.
Where to read the primary sources
- California Family Code §70 — the definition of the date of separation.
- Date of separation — California Courts self-help guide, with the kinds of evidence the court considers.
- Property and debts — the same guide, on community property and retirement plans.
- Form FL-348 — the temporary pension order pending a QDRO.
- In re Marriage of Lehman (1998) 18 Cal.4th 169 — the time rule and the "single concrete fact of time".
- IRS Publication 555 — the nine community property states.
What this page is not
It is not legal advice, and a date of separation is decided on the facts of one marriage, by a judge who hears both sides. What this page can do is tell you what the law asks and which kinds of records answer it, so that you know what to keep before you need it.
