South Dakota No-Fault Divorce: The Consent Rule Most Filers Miss

No-Fault Isn't Automatic in South Dakota

Most states let either spouse file for a no-fault divorce unilaterally — one person says the marriage is broken, and the court accepts that. South Dakota doesn't work that way.

Under SDCL § 25-4-17.2, a court cannot grant a divorce based on irreconcilable differences unless both spouses formally consent in writing. The one exception: if the defendant never responds to the filing and the case proceeds as a default, the court treats their silence as non-opposition and can grant the no-fault divorce without written consent.

This means if your spouse files an Answer objecting to the no-fault grounds, the uncontested pathway is blocked. You'd need to either reach an agreement with your spouse to consent in writing, or amend your complaint and prove one of South Dakota's fault-based grounds at trial.

The Six Fault-Based Grounds

If the no-fault path closes, SDCL § 25-4-2 provides six fault-based alternatives. Each requires specific evidence:

Adultery — voluntary sexual intercourse with someone outside the marriage.

Extreme cruelty — infliction of grievous bodily injury or grievous mental suffering. This isn't limited to physical violence; severe emotional abuse can qualify.

Willful desertion — one spouse voluntarily left the marriage and stayed gone for at least one continuous year.

Willful neglect — persistent failure to provide necessities of life despite having the financial ability to do so, lasting at least one year.

Habitual intemperance — persistent, excessive use of alcohol or controlled substances for at least one year, severe enough to disrupt normal daily functioning or cause intense mental anguish.

Conviction of a felony — the defendant was convicted of a felony during the marriage.

A seventh ground — chronic mental illness requiring confinement in a mental institution for at least five years — exists at the court's discretion but is rarely invoked.

Why the Consent Rule Matters for Your Strategy

If you're filing for divorce and your spouse is cooperative, the consent requirement is a non-issue. They sign the Stipulation and Settlement Agreement (UJS-324 or UJS-325), the jurisdictional affidavit (UJS-319A or UJS-319B), and the case moves through the stipulated track without a hearing.

If your spouse is uncooperative but passive — meaning they won't engage at all — the default path works in your favor. After being properly served, they have 30 days to file an Answer. If they don't respond, you can file for a default judgment once the 60-day waiting period expires. The court grants the no-fault divorce based on their non-response.

The worst-case scenario is a spouse who actively objects. They file an Answer contesting the no-fault grounds, which forces you to either negotiate or prepare for a contested trial on fault grounds. Contested divorces in South Dakota typically cost between $10,000 and $50,000 in legal and expert fees and take 6 to 18 months to resolve.

Fault and Property Division

One common misconception: proving fault gives you a bigger share of the assets. In practice, marital misconduct doesn't affect property division in South Dakota unless the misconduct directly relates to the acquisition, preservation, or dissipation of marital assets. Spending joint savings on an affair partner could shift the property split. Simply proving adultery won't.

Where fault does matter is spousal support. Under South Dakota case law, proven fault remains a relevant factor when the court determines whether to award alimony and in what amount.

The Practical Takeaway

For most self-represented filers, the no-fault consent rule means one of two things: either get your spouse's written consent early in the process, or prepare for the possibility that they default by making sure your service of process is properly executed.

The South Dakota Divorce Filing Process Guide covers both tracks — the consent-based stipulated path and the default path — with the specific forms and deadlines for each.

See more South Dakota guides →