California No Fault Divorce

California Is a Pure No-Fault State

California was the first state in the country to adopt no-fault divorce, back in 1970. Under Family Code § 2310, there are exactly two legal grounds for dissolution of marriage:

1. Irreconcilable differences that have caused the irremediable breakdown of the marriage
2. Permanent legal incapacity to make decisions (requires competent medical testimony and is extremely rare in practice)

In practical terms, nearly every California divorce is filed under irreconcilable differences. The petition includes a checkbox — you check it, and that's the extent of your legal burden. You don't need to prove anything specific happened in the marriage.

What "No Fault" Actually Means

A single spouse can decide the marriage is over, file the petition, and the court will grant the divorce even if the other spouse objects. There's no defense against irreconcilable differences. If one person says the marriage can't be saved, the court accepts that at face value.

You don't need to prove infidelity, cruelty, abandonment, or any other form of misconduct. Under Family Code § 2335, evidence of specific acts of marital misconduct is inadmissible in dissolution proceedings. A judge literally cannot consider an affair, spending habits, or personality conflicts when deciding whether to grant the divorce.

This means the divorce itself is never really in question — the court will dissolve the marriage. What gets contested in California is never "should we get divorced?" but rather "on what terms?"

Where Fault Still Matters

While fault doesn't affect whether you get divorced, certain types of misconduct do factor into specific financial and custody decisions:

Domestic violence and custody. When a court finds that a parent seeking custody has perpetrated domestic violence within the preceding five years, Family Code § 3044 creates a rebuttable presumption that awarding that parent sole or joint physical or legal custody is detrimental to the child's best interest. The presumption may be rebutted only by a preponderance of the evidence.

Domestic violence and spousal support. Under Family Code § 4325, a spouse with a domestic violence conviction against the other spouse within the past five years faces a rebuttable presumption that they should not receive spousal support.

Asset dissipation. If a spouse wasted, hid, or deliberately squandered community assets — funding an extramarital relationship with community funds, transferring assets to a friend in anticipation of divorce, gambling away savings — the court can adjust the property division to compensate the other spouse. This falls under the fiduciary duties spouses owe each other under Family Code § 721.

These are narrow exceptions, not general fault considerations. An affair doesn't change property division unless community money was spent on it. Bad behavior doesn't affect spousal support unless it rose to criminal domestic violence.

How to File Under Irreconcilable Differences

The process is the same whether you're filing a traditional petition (FL-100), a joint petition (FL-700), or a summary dissolution (FL-800).

On the FL-100, there's a single checkbox asking for the grounds for dissolution. Check "irreconcilable differences." You don't need to explain what those differences are, provide examples, or submit evidence.

On the FL-700 joint petition, both spouses jointly declare irreconcilable differences. Same checkbox, same simplicity.

There's no hearing on grounds. No testimony required. The court treats the checked box as sufficient.

Common Misconceptions

"I need to prove my spouse was at fault to get more in the divorce." In California, that's not how it works. Property division follows the community property framework — all community assets and debts are split equally regardless of behavior. Spousal support is determined by a list of statutory factors (Family Code § 4320) that focus on needs, earning capacity, and marriage length — not misconduct.

"My spouse can stop the divorce." They can't. They can make the process more complicated by refusing to cooperate (forcing a contested path), but they cannot prevent the divorce from being granted. An unresponsive spouse leads to a default judgment, not a denial.

"Irreconcilable differences means we have to disagree on something specific." It doesn't. It simply means one spouse believes the marriage is past the point of repair. No further definition or proof is needed.

For a step-by-step guide through the actual filing process — from choosing your path through assembling the judgment packet — the California Divorce Filing Process Guide walks through each phase in chronological order.

See more California guides →