What Is No-Fault Divorce?

No-fault divorce is a legal dissolution of marriage in which the filing spouse does not need to prove that the other spouse did anything wrong — such as adultery, cruelty, or abandonment. Instead, the petitioner simply states that the marriage is irretrievably broken, usually citing “irreconcilable differences” or “incompatibility.” All 50 U.S. states now allow no-fault divorce, making it the standard path to ending a marriage in America.

How Does No-Fault Divorce Work?

In a no-fault divorce, one or both spouses file a petition with the court stating that the marriage cannot be saved. The process typically follows these steps:

1. Filing — One spouse (the “petitioner”) files a divorce petition with the local court, citing irreconcilable differences or an irretrievable breakdown of the marriage.
2. Service — The other spouse (the “respondent”) is formally served with the divorce papers.
3. Response — The respondent files an answer, either agreeing or disagreeing with the terms proposed.
4. Negotiation or litigation — The couple resolves issues like property division, custody, and support through negotiation, mediation, or trial.
5. Waiting period — Many states impose a mandatory waiting period (typically 30—90 days, though some require 6—12 months of separation).
6. Final decree — The judge signs the divorce decree, officially ending the marriage.

The key distinction: at no point does either spouse need to prove fault. The court accepts the assertion that the marriage is broken without requiring evidence of misconduct.

History of No-Fault Divorce

No-fault divorce represented a seismic shift in American family law.

Year	Milestone
Before 1970	All U.S. divorces required proof of fault (adultery, cruelty, desertion, etc.)
1970	California becomes the first state to adopt no-fault divorce under Governor Ronald Reagan’s Family Law Act
1970s—1980s	Most states follow California’s lead and add no-fault grounds
1985	South Dakota becomes the 49th state to allow no-fault divorce
2010	New York becomes the last state to adopt no-fault divorce, ending the requirement to prove fault

Before no-fault laws, couples who wanted to divorce amicably often had to fabricate fault allegations — a practice that congested courts and forced families into adversarial proceedings even when both parties agreed to separate.

What Does “Irreconcilable Differences” Mean?

“Irreconcilable differences” is the most common legal ground cited in no-fault divorce petitions. It means the spouses have fundamental disagreements or incompatibilities that cannot be resolved, making the continuation of the marriage impossible.

Courts do not require specifics. You do not need to explain what the differences are or prove that counseling failed. The statement itself is sufficient. Some states use alternative phrasing:

• “Irretrievable breakdown” — Used in states like Colorado, Connecticut, and Montana
• “Incompatibility” — Used in Oklahoma and some other states
• “Insupportability” — Texas’s term for irreconcilable differences
• “Living separate and apart” — Required in some states (e.g., North Carolina mandates 1 year of separation)

No-Fault vs. Fault-Based Divorce

Even though all states allow no-fault divorce, many still permit fault-based filings as an alternative. Here is how they compare.

Feature	No-Fault Divorce	Fault-Based Divorce
Grounds required	Irreconcilable differences	Adultery, cruelty, abandonment, imprisonment, etc.
Proof needed	None beyond the petition	Evidence of specific misconduct
Impact on property division	Typically none	May result in a larger share for the innocent spouse (in some states)
Impact on alimony	Usually not a factor	Fault may increase or bar alimony
Timeline	Generally faster	Often slower due to contested allegations
Cost	Lower on average ($7,000—$15,000)	Higher on average ($15,000—$50,000+)
Emotional toll	Lower	Significantly higher

Filing on fault grounds can still be strategically advantageous in some states. For example, in Virginia, proving adultery can bar the at-fault spouse from receiving spousal support.

Does No-Fault Divorce Affect Property Division?

In most states, filing for no-fault divorce does not change how property is divided. Courts in equitable distribution states still consider the same factors (income, contributions, marriage length) regardless of who is “at fault.”

However, a few states allow judges to consider marital misconduct when dividing property, even in no-fault proceedings:

• South Carolina — Adultery can affect the division of assets
• Connecticut — Judges may consider the “causes for the annulment, dissolution, or legal separation” when dividing property
• Virginia — Fault grounds can influence equitable distribution

In community property states (Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, Wisconsin), assets are generally split 50/50 regardless of fault.

State Waiting Periods for No-Fault Divorce

Waiting periods vary considerably across states:

Waiting Period	Example States
None	Alaska, Montana, South Dakota
30—60 days	California (6 months), Colorado (91 days), Florida (20 days)
6 months	California, Vermont
1 year separation	North Carolina, Virginia (no children)
2 years separation	Pennsylvania (if non-mutual)

These waiting periods are designed to give couples time to reconsider and potentially reconcile. Uncontested no-fault divorces in states with no waiting period can be finalized in as few as 4—6 weeks.

Frequently Asked Questions

Can my spouse stop a no-fault divorce?

In most states, no. If one spouse wants a divorce, the other cannot prevent it simply by refusing to agree. The court will grant the divorce as long as the statutory requirements (filing, waiting period, service) are met. Some states allow the respondent to contest specific terms (like property division or custody) but not the divorce itself.

Is a no-fault divorce cheaper than a fault-based divorce?

Generally, yes. According to a 2023 Martindale-Nolo survey, the average cost of an uncontested no-fault divorce in the United States is approximately $7,000, while contested divorces average $15,000—$30,000. Fault-based divorces that go to trial can exceed $50,000 per spouse due to the cost of proving allegations and presenting evidence.

Does no-fault divorce mean I cannot raise my spouse’s misconduct at all?

It depends on the state and the issue. While no-fault grounds remove the requirement to prove misconduct for the divorce itself, some states still allow fault evidence to influence alimony, property division, or custody decisions. For example, evidence of domestic violence is relevant to custody in every state, and evidence of financial misconduct (dissipation of assets) can affect property division.

How Untie Can Help

Even in no-fault proceedings, financial transparency matters. Courts still need a complete picture of marital assets to divide them fairly. When one spouse suspects the other has hidden accounts, undervalued a business, or dissipated marital funds, Untie’s asset-tracing platform can map the full financial landscape — providing the evidence needed for equitable division regardless of who filed or why.